Go back to Red Rock Energy.
*
EREN has a web site that defines the heat cycles.
Ever since I started the Heliostat Array project it became clear to me that some form of electric power generating capability was needed. Physics says that all forms of energy can be expressed in equivalent units. While this is true, some forms of energy are more $$$VALUABLE$$$ than others. I usually rate the value of heat lowest with mechanical higher and electricity the highest. In the process of generating any of the higher forms of energy some is wasted and eventually ends up as heat anyway.
The first and most obvious method I examined for electric generation was high concentration factor PV cells. Due to some specific problems encountered when used with my heliostat arrays I had to abandon PV cells in my system. See:
The next best method would be some form of heat engine. There are several that make good candidates:
I have worked with all of these except the for the Rankine turbine and thermionic generators. All engines have advantages and disadvantages. For use with my heliostats I have chosen either the Steam Rankine piston engine or the Rankine rotary expansion engine using propane as the working fluid.
However, the thermionic generators have great potential.
Steve Spence <sspence@green-trust.org> posted this list of thermodynamics studies on the web. Thanks Steve.
The question that was posed was in reference to the Carnot cycle and the efficiencies that can be obtained.
theorem which says that a maximum efficiency of heat engine can be obtained by a reversible engine, and that efficiency depends only on the temperatures of the hot and the cool sources of the engine. This theorem played an essential role for the subsequent development of thermodynamics (Clapeyron, Kelvin, Rankine, and Clausius, to mention only a few), leading eventually to the discovery and mathematical formulations of the first and the second law of thermodynamics.
Students should understand the second law of thermodynamics, the concept of entropy, and heat engines and the Carnot cycle so they can:
1. Determine whether entropy will increase, decrease, or remain the same during a particular situation.
2. Compute the maximum possible efficiency of a heat engine operating between two given temperatures.
3. Compute the actual efficiency of a heat engine.
4. Relate the heats exchanged at each thermal reservoir in a Carnot cycle to the temperatures of the reservoirs.
physics The steam turbine would be very nice because they turn at a relatively high speed. Generally high speed is another one of those valuable qualities. Hi speeds equate to small and efficient alternators. Two big down sides for turbines are the extreme extremely expensive cost and that the unavailability of small units. (If anyone has any references to small cost effective units please write and inform me.)
A bunch of sites that desscribe the math and physics behind heat engines:
turbine
Rankine turbine generator.
| * Turbine Technologies Advanced Steam Turbine Powerplant |
reliable
Reliable Steam Engine Co.
| * Reliable Steam Engine Co. Impulse-Reaction Turbine New type of turbine suitable for small power systems or waste heat energy recovery from diesel engine exhaust and other heat sources. |
newton stonepath
* C. Christopher Newton
This is a beautiful example of a Solar Dish Steam Turbine Electric Generator.
This was his masters thesis project.
Attached is a copy of his thesis paper which is on a concentrated solar thermal steam system.
In the appendices of the paper, you will find the diagrams for the steam turbine.
With the proper amount of steam supplied, the turbine is capable of 5 hp.
Stonepath power Systems Ltd.
*
Manufacturer of low power electric generators that operate from wood or other fuels.
<sales@stonepathpower.com>
#9 - 4275 - 78Avenue S.E.
Calgary, Alberta, Canada T2C 2Y4
Telephone (403)-201-8555
I don't know if they do this stuff anymore though.
piston The piston steam engine has a long track record. I can purchase a working modern 5hp steam engine from Jade Mountain. Unfortunately this is also too expensive for my system.
steam1910 This was built by Arthur Freeman who was the plant manager at the Lace Mill in Coventry RI around 1910. This was passed on to me from the man I bought it from and I have known him for years so I trust his info.
steamtwinboat bash This is a very interesting uniflow steam engine with bash intake valves. It is built using components from a 3 cylinder Diesel engine. The steam is obtained from a large concentrating parabolic dish.
rotary "The Steam Outlet" Another company is:
Rankine piston engine generator.
* Tiny Power
Steam engine kits.
I just bought this steam engine on EBAY
Live Steam Engine Lathe Bed Model
Early Lathe Bed Steam Engine
About 15" L and 6 1/2 T 1 3/4 stroke 1 bore with a locomotive style crosshead guide 4 1/2 x 1/2 flywheel with a 2 1/2 x 1" belt pully. Main frame is solid steel with and interesting curve to off set the crankshaft to allow for the crank pin disc to align with the crosshead. 90% of the bolts are square head. Valve pivot is brass also the cylinder. It has a flat steel base. Engine is tight as the day it was built and it runs extremely well. The weight is about 20 pounds.
I just bought another steam engine on EBAY
Twin Cylinder Steam Boat Engine
Requires cylinder heads, class as for restoration, 6 x 3 x 7 inches
*
Erik Rossen quotes from The White Cliffs Solar Steam Engine report.
Rankine rotary expansion generator.
vane
Rotary steam vane expanders have been described by a company called:
P.O. Box 1426
Thonotassassa, FL 33592
This company describes several engines and steam boilers.
Catalog $5.00
Reliable Steam Engine
P.O. Box 671
Waldport, OR 97394
(541)563-2535
| Click the Scroll Image to see the Animation. Notice that in this Compressor Animation that a crescent shaped area is captured and compressed into smaller areas toward the center. This action is completely reversible when rotated in the opposite direction operating as an expander. * Copeland Compliant Scroll Compressor Technology. * Copeland Compliant Scroll Compressor Line. The new web page requires a password for product specifications. |
| The Copeland scroll compressor is housed in a sealed canister. The scroll is connected to an integral induction motor. When operated as an expander the induction motor acts as an induction generator capable of generating AC power. |
| Sanden International (USA) Inc. * Sanden is a company that makes automotive air conditioning scroll compressors. |
|
| Atlas Copco Makes scroll air compressors. * Atlas Copco Scroll Compressor Technology. |
denso mitsubishi Edgar Moreno <empenter@caribe.net> supplied us with this table of OEM part numbers and automotive manufacturers that have scroll and vane air conditioning compressors.
Thanks Edgar!
acparts truckair mkj vrs fx105v
Denso vane compressors are made by Nippondenso. They makes automotive air conditioning moving vane compressors.
Mitsubishi is a company that makes automotive air conditioning scroll compressors.
* A/C Products
has an extensive listing of automotive make & model applications for air conditioning compressors, including scrolls.
* Truck Air Parts has some application information.
* M. K. J. Sourcing & Supply Ltd. has drawings of Sanden compressors.
* Sanden TRS090R3015 Stamped F90R
* Sanden TRS090A3016 Stamped F90P
* Sanden TRS090N3018 Stamped S90N/F90J
* Sanden TRS090P3019 Stamped F90P
* TRS090 Spare parts exploded view
* Sanden TRS105E3206 Stamped 105E
* Sanden TRS105R3211 Stamped S105R
* TRS105 Spare parts exploded view
* 4 Seasons has some pictures of Sanden compressors.
Disasemmbled Mitsubishi FX105V
The check valve that needs to be removed to allow operation as an expander.
Bearing and compliant eccentric mechanism.
| Sanden Scroll Compressors | |||
| Model # | OEM# | Make | Used in |
| TRF090(MOD.2050) | - | Honda Honda Honda Honda Honda Hyundal | Accord 2.7 93-97 Civic 90-95 CRX 1.6 92-93 Del Sol 93 Prelude 92-93 Elantra 92-93 |
| TRS090 Sanden OEM# 44950,44961 | 4595666 | Chrysler Honda Honda | Cirrus 95-98 Accord 95-96 Honda Civic, Del Sol 93-96 |
| TRS090 Sanden | - | Chrysler Dodge Ford Honda Honda Honda Mazda Plymouth | Sebring conv 2.0 96-98 Stratus 2.0, 2.4, 2.5 95-98 Taurus 96-98 3.4L Civic 1.6 92-98 Del Sol 93-95 Prelude 93-95 Protoge 95-98 Breeze 96-98 |
| TRF105 | - | Dodge Vans Saab | Full Size Series A, B, CB, MB, 92-94 98-99 |
| Mitsubishi Scroll Compressors | |||
| Model # | OEM# | Make | Used in |
| FX80 | MB630342 MB630342 | Mitsubishi Mitsubishi | Montero 92-94 Pick-up 90-94 |
| FX105V | AKA201A201 AKA201A205 | Chrysler Dodge Dodge Eagle Mitsubishi Mitsubishi Mitsubishi Plymouth Plymouth | Vista Colt 1.5, 1.6, 1.8 89-92 Stealth 3.0 91-93 Summit 1.5 89-92 Diamonte 3.0 91-93 Galant 2.0 89-93 Mirage 89-93, 89-94 Colt 1.5, 1.8 89-92 Colt 1.6 89-90 |
| MSC90C | - | Chrysler Dodge Eagle Mitsubishi Mitsubishi Mitsubishi | Sebring 95-98 Colt 1.8 16V 94-95 Summit 1.5,1.8 93-93 Eclipse 98 Mirage 89-92 Mirage 1.5, 1.8 93-97 |
| Denso Vane Compressors (Nippondenso) | |||
| Model # | OEM# | Make | Used in |
| TV10C | - | - | - |
| TV12C | - | Toyota Toyota Toyota Mazda Chevrolet Chevrolet | Corolla GTS 87-91 Paseo 91-95 Tercel 86-94 Miata 89-93 Prism SL 88-92 Nova SL,4 Cyl 1988 |
| TV14C | - | Toyota Toyota | Corolla GTS with Power Steering 87-91 Tercel with Power Steering 86-88 |
If any of you have more information on these compressors would you be so kind as to tell me about them.
The big advantage of the Sanden and Mitsubishi automotive compressors over the Copeland is that it can be disassembled.
henry
* An interesting rotary engine useful with steam
| Sterling Thermal Power Originator of Non-Mechanical Feedpumps for Rankine Cycle Power Plants. |
| New 2 hp version. |
lmmhd
Rankine LMMHD generator.
Preliminary drawing of a solar powered LMMHD.
An interesting variation on the Rankine heat engine is the Liquid Metal Magnetohydrodynamic generator, or LMMHD. I have been studying these for several years and I think they may have good possibilities for generating electricity when used with my heliostat arrays.
Here are a bunch of patents that relate to this subject.
* US3878410: Two-phase liquid-metal magnetohydrodynamic (MHD) generator
* US4191901: Method and system for converting solar energy into electricity
* US4200815: MHD Generating system
* US4287443: Liquid-metal magnetohydrodynamic converter
* US4388542: Solar driven liquid metal MHD power generator
* US5637934: High expansion magnetohydrodynamic liquid metal generator of electricity
brayton
Brayton gas turbine generator.
I have done some experimentation with Brayton turbine engines. In order to learn about these engines I and Tim Roman <mustang2@pclink.com>, a friend of mine, built a jet engine using an automotive turbocharger. I learned a lot about Brayton engines from this setup. The primary conclusion was that the single stage turbines don't have enough compression ratio along with high enough efficiencies to be used at the low temperatures obtained from my heliostat array solar concentrators. Maybe some day, but they are not here yet.
| * Capstone Turbogenerators. * A series of Capstone pictures. |
| * GE MicroGen Gas Turbine Cogenerators. |
igti
International Gas Turbine Institute.
| * International Gas Turbine Institute. |
turbtecbrayton
Turbine Technologies
|
| * Turbine Technologies Turnkey Propulsion Laboratory- Mini-Lab |
I have experimented with a form of piston engine suggested to me by Gene Townsend called a rubber diaphragm piston Brayton engine. This rubber engine essentially is built from flat cone of silicon rubber backed by a shaped metal plate. This type of piston is completely sealed, a very desirable quality. I haven't had enough time to work on this engine to completion so I can't report on the how well it works. Gene suggests this construction technique would work better as a steam Rankine engine.
Rankine type Rubber Engine
Electrically Operated
Intake Exhaust
H | H H | H
H\|/H H\|/H
HHHHHHH - HHHH - HHHHHHH H=Head
H H D=Diaphragm
H H B=piston Backer
H H
HHHHH HHHHHH
DDDDDD DDDDDDDDDDDDDDDDDDDDDD DDDDDDD
D DBBBBBBBBBBBBBBBBBBBBBBD D
DB BD
B B
B B
Rankine Flywheel Assembly
FFF FFF
NNN FFF FFF F=Flywheel assembly
BBBBBFFF FFF N=Needle Bearings
BBBBBFFF FFF T=Thrust bearing
NNN FFF FFF B=piston Backer journal
FFF T T FFF
FFF T NNNN NNNN T FFF
FFFFFFFFFFFFFFFFFFFFFFFFFF
FFFFFFFFFFFFFFFFFFFFFFFFFF
FFF T NNNN NNNN T FFF
FFF T T FFF
FFF FFF
FFF FFF
FFF FFF
FFF FFF
FFF FFF
--------------------------------------------------------
Brayton type Rubber Compressor
Exhaust Reed Valves
RRRRR RRRRR R=Reed Valves
HHHHHHH HHHH HHHHHHH H=Head
H H D=Diaphragm
H H
H Intake Read Valves H B=piston Backer
HHHHH RRRRR RRRRR HHHHHH
DDDDDD DD DDDDDDDDDDDD DD DDDDDDD
D DBB BBBBBBBBBBBB BBD D
DB BD
B B
B B
Brayton type Rubber Expander
Intake Reed Valves
RRRRR RRRRR R=Reed Valves
HHHHHHH HHHH HHHHHHH H=Head
H H D=Diaphragm
H Bash H P=bash Pins
H P Pins P H B=piston Backer
HHHHH RRRRR P P RRRRR HHHHHH
DDDDDD DD P DDDDDDDDDDDD P DD DDDDDDD
D DBB P BBBBBBBBBBBB P BBD D
DB P Exhaust P BD
B P Bash P B
B P pins P B
Flywheel Assembly
FFF FFF
NNN FFF FFF F=Flywheel assembly
NNN BBBBBFFF FFF N=Needle Bearings
PPPPPBBBBBFFF FFF T=Thrust bearing
PPPPP NNN FFF FFF B=piston Backer journal
NNN FFF T T FFF NNN C=Compressor journal
FFF T NNNN NNNN T FFFCCCCC P=exhaust bash Pin eccentric
FFFFFFFFFFFFFFFFFFFFFFFFFFCCCCC
FFFFFFFFFFFFFFFFFFFFFFFFFF NNN
FFF T NNNN NNNN T FFF
FFF T T FFF
FFF FFF
FFF FFF
FFF FFF
FFF FFF
David Wells and I have discussed the use of these expanders for use in Rankine engines. Here is my concept. Take a Copeland Scroll Compressor complete with its 3 phase induction motor almost off the shelf. This complete assembly is in a sealed metal container. If high pressure gas is connected to the expander it rotates and applies torque to the induction motor. The induction generator can be directly connected to the power grid.
One disadvantage of using the Copeland unit is the inability to use steam. The induction generator and bearings are exposed to the working fluid. Steam will destroy these components. This requires fluids other than steam.
propane These gases are compatible with refrigeration oils which are used for scroll and bearing lubrication. The oil is pumped from the low pressure sump to the inlet where it passes through the scroll. This pump operates continuously whenever the expander is turning to provide lubrication. Some of the oil will pass through the boiler as dissolved oil in the fluid and return as a mist which also passes through the scroll. The boiler must be designed properly to prevent oil accumulation. One method could be the use of float type oil separators in low trap sections that let the oil pass through to the boiler outlet.
A second pump pressurizes the condensate and injects it into the solar boiler. The quantity of fluid injected is regulated by the quantity of fluid in the boiler. The objective is to make sure that the boiler is not so full as to let liquid pass out of the boiler and into the expander. This would be called liquid slugging and is detrimental to the expander.
The oil used in the system must be capable of sustained operating temperatures in excess of 600 F. without deterioration.
The solar boiler has some special requirement and advantages over fired boilers.
One of the biggest advantages of the solar boiler is the absence of high temperature corrosive flue gases. If a fired boiler looses its water it could fail from high temperature weakening of the steel. The solar boiler will typically never get hot enough to be damaged.
One of the biggest problems is caused when the sun is intermittently covered by clouds. Fired boilers generally have steady heat inputs. A small amount of thermal storage in the collector is desirable.
Several people have suggested that the best solar boiler be constructed of large diameter stainless steel tubing wound into a loose coil of a few turns. This tubing is then cast inside a heat spreader of aluminum 2 inches thick. The aluminum has a large thermal mass which holds enough heat for several minutes of operation. The aluminum has high thermal conductivity which evens out the heliostat influx variations.
I am looking into aluminum casting shops to inquire about the cost of such a receiver. The shape for my system would be about 2.5 ft x 8 ft. If a boiler for a 12 ft dish was required the boiler could be about 2 ft in diameter.
I have chosen propane as it is low in cost and has about the right working pressure. Butane or pentane are also candidates. These fuel gases are a much better choice than the standard refrigerants primarily because of cost but also because they are non ozone depleting gases. The total system must be completely sealed to retain the gases.
boiler
Aluminium Solar Boiler.
diesel
Diesel Engines.
bio
Bio Diesel Engines.
| * Solar Frost A Breakthrough in Solar Refrigeration Technology. |
<Bob Gilbert> posted this responce to an inquiry on the alt.energy.homepower news group. Thanks for the info Bob.
The name is followed by a number which indicates millions of btu's released per unit (Million BTU/Unit). Assuming 100% burning efficiency ... which ain't gonna happen in real conditions. i.e. the figure for kerosene shows that with 100% burning efficiency one might get 131,000 btu's of heat per gallon.
Second number is the number of units one needs to burn to produce one million btu's, assuming the 3rd number .... which is average efficiency for all installed devices. Keep in mind, one might have a new natural gas furnace capable of much better than the 80% assumed in the figures I show. I do, for instance. However, overall, figuring all natural gas furnaces installed, 80% is a fair figure as an average. Recalculate the numbers if your stove, furnace, fireplace or whatever is a newer, better, more efficient device.
| Fuel | MBtu/unit | units/MBtu @ | Efficiency |
|---|---|---|---|
| #2 Fuel oil | 0.143/gal | 8.77 | 80% |
| Kerosene | 0.131/gal | 9.56 | 80% |
| Charcoal | 0.0125/lb | 107 | 75% |
| Coal, Anthracite | 26.3/ton | 0.051 | 75% |
| Coal, Bitumenous, low volatiles | 28.7/ton | 0.046 | 75% |
| Coal, Bitumenous, high volatiles | 24.7/ton | 0.054 | 75% |
| Coal, Subbitumenous | 19.2/ton | 0.069 | 75% |
| Coal, Lignite | 13.9/ton | 0.096 | 75% |
| Apple | 29/cord | 0.063 low smoke low spark | 55% efficiency and average 20% moisture content |
| Aspen | 17/cord | 0.110 med smoke hi spark | 55% efficiency and average 20% moisture content |
| Cottonwood | 16/cord | 0.115 med smoke low spark | 55% efficiency and average 20% moisture content |
| Elm | 20/cord | 0.092 med smoke med spark | 55% efficiency and average 20% moisture content |
| Fir, Douglas | 26/cord | 0.069 hi smoke med spark | 55% efficiency and average 20% moisture content |
| Hickory | 28/cord | 0.066 low smoke low spark | 55% efficiency and average 20% moisture content |
| Maple | 22/cord | 0.084 low smoke low spark | 55% efficiency and average 20% moisture content |
| Oak | 26/cord | 0.069 low smoke low spark | 55% efficiency and average 20% moisture content |
| Pine, lodgepole | 17/cord | 0.106 med smoke med spark | 55% efficiency and average 20% moisture content |
| Pine, pinion | 31/cord | 0.058 med smoke med spark | 55% efficiency and average 20% moisture content |
| Pine, ponderosa | 19/cord | 0.097 med smoke med spark | 55% efficiency and average 20% moisture content |
| Pine white | 15/cord | 0.125 med smoke hi spark | 55% efficiency and average 20% moisture content |
| Spruce, Englem | 16/cord | 0.114 med smoke hi spark | 55% efficiency and average 20% moisture content |
| Electricity | 0.003/kWh | 308 | 95% |
| Natural gas | 1.05/Mcf | 0.839 | 80% |
| Propane | 2.53/Mcf thousand cubic foot | 0.5 | 80% |
sanimation
Stirling Engine Animations.
http://www.qrmc.com/hydralinkanimation.gif
http://www.qrmc.com/model2animation.htm
Will Rausch <wrausch@lanminds.net> was kind enough to supply this list of Stirling engine links.
Thanks, Will, from all of us.
Not all the links work, but most do. Some may be off line at different times of the day or week. Have patience.
neat
A link to my Stirling Patent page
http://www.redrok.com/neat.htm#stirling
pm
PM Research Inc.
Working Model Steam Engine & Machine Tool Kits, Model Supplies and Finished Model Hot Air & Stirling Cycle Engines.
http://www.pmresearchinc.com/home.htm
omachron
Omachron
Low-Cost, Mass-Production Stirling-Based Engine.
http://www.omachron.com/papers.html
emachineshop
The E Machine Shop
An ultra low differental temperature Stirling engine, similar to Senft's, but with a rotary displacer.
Jim Lewis sells a kit of parts.
http://www.emachineshop.com/engine/index.htm
bobsier
Bob Sier's Stirling and Hot Air Engine pages
http://www.argonet.co.uk/users/bobsier/inde.html
gambit
Gambit
http://www.gambit.ch/engines/engines.html
qrmc
Quiet Revolution Motor Company L.L.C.
http://www.qrmc.com/index.html
A realy neat 3 cylinder Ringbom Stirling engine.
And a great animated graphic at:
http://www.qrmc.com/animationtext.htm
They have another engine and animation at:
http://www.qrmc.com/model2animation.htm
liquidpiston
LIQUID PISTON, VTC: LIQUID PISTON ENGINE
http://www.ifdt.uh.edu/vtc/liquidpiston/main.html
stm
STM Corporation
STM 4-120
http://www.stmcorporation.com/
uwemoch
250 WATT-SHAFT POWER ENGINE
UWE MOCH Plans & Parts Available
http://www.uwemoch.de/
http://www.geocities.com/Viebachstirling/
http://members.aol.com/UweMoch/UWE3.GIF
stirling-tech
5 HP STATIONARY ENGINE, STIRLING TECHNOLOGY HOME PAGE
http://www.stirling-tech.com/
5 HP PRODUCTION ENGINE
Multi & Solid Fuel Burners
Has built in air compressor to charge the system to operating pressure of 72psi
http://www.stirling-tech.com/stirling.htm
stirleengl
500 WATT-SHAFT POWER PRODUCTION ENGINE BY THE STUDY GROUP STIRLING
Plans Available?
http://members.aol.com/bkammerich/stirleengl.htm
dish-stirling
A COMPENDIUM OF SOLAR DISH/STIRLING TECHNOLOGY
http://solstice.crest.org/renewables/dish-stirling/index.html
jcrouch
A LOOK AT THE STIRLING CYCLE
Nice set of links
Pages under construction when last visited 3/14/97
http://www.concentric.net/~Jcrouch/
primer
A PRIMER ON STIRLING ENGINES
http://www.tiac.net/users/pcag/solar/primer.htm
stirlingcycle
stirlingengine
AMERICAN STIRLING COMPANY
Down loadable Catalog
HOME PAGE
http://www.stirlingcycle.com/
http://www.stirlingengine.com/
HOW DO THEY WORK
http://www.stirlingcycle.com/how_do.htm
http://www.stirlingengine.com/how_do.htm
STIRLING FAQs
http://www.stirlingcycle.com/faq.htm
http://www.stirlingengine.com/faq.htm
LINKS
http://www.stirlingcycle.com/links.htm
http://www.stirlingengine.com/links.htm
ahaffner
ANDREAS HAFFNER - STIRLING ENGINE PAGE
LINKS PAGE
http://home.online.no/~ahaffner/stirling.htm
BOOKS & MAGAZINE ARTICLE REFERENCE PAGE
http://home.online.no/~ahaffner/selitref.htm
tachemier
ANIMATION: STIRLING-MOTOR/STIRLING ENGINE
ANIMATION & P/V DIAGRAMS WITH VARIABLE PRAMATERS/CACULATOR
http://techni.tachemier.uni-leipzig.de/~stirling/
ANIMATION: STIRLING-MOTOR/ STIRLING ENGINE
ANIMATION BY ITC AND NUD
Animation illustrates the functioning of a Stirling Engine with the Phases of the Cycle
displayed and a P-V diagram for the current part of the cycle time in %.
http://techni.tachemie.uni-leipzig.de/~stirling/
baileycraft
BAILEY CRAFTSMAN SUPPLY
Stirling Cycle Engine Kits
Books & Plans
Model Engineering
Links-To Related Sites
http://www.baileycraft.com/
bcs
BCS STIRLING ENGINE and METAL WORKING ???
Model Kits & Books/Plans
http://www.summitinfo.com/bailey/
bomin BOMIN SOLAR RESARCH philips book eschmidt stirlingde exergia yosemite stirl olinks james kockums lakens jmcent malone tamin tiac cryocoolers miser mit greve prayer sigma solo whispergen pancake HOME PAGE - Plans - Theory - Info - Etc. STIRLING ENGINE OF SAITAMA UNIVERSITY nasa olympics sunpower saitama TERA.MECH.SAITAMA-U.AC.JP/KIRIKI, PAGE 2 OF 2 ??? test-tube little engine steveb xess stirling_news wrench_ten bohm boehm stirling-motoren symanski nederpelt alamos cloquet sbp THIS IS THE END OF THE STIRLING LINKS. Thermionic generators produce electricity by heating one surface and cooling and removing heat from another surface. There is a vacuum between the surfaces or plates. The hot surface emits electrons from one plate called the cathode and collected on the other plate, the anode.
These devices are governed by the heat engine limitations of Carnot. Further limitations are caused by the considerable work function of sending electrons across the vacuum and the poor quality of the electron emissions from the cathode.
Classically these devices required very high temperatures and has efficiencies of less than 1%. McDonald Douglas had done considerable work with thermionic generator at the focus of parabolic dishes.
A company that has made significant advancements in thermionic generators is * Thermionic Conversion and Related Basic Physics
BOMIN SOLAR: LOW TEMP STIRLING BREAKTHROUGH
From Bomin Solar, a Swiss/German company -
HOME PAGE
http://www.bominsolar.com
Mid & Low Temp Stirling Engines
http://www.bominsolar.com/hp/
SUNPULSE - Low Temp Stirling
Designed To Run On Unconcentrated Sun Light - Diagrams & Details
http://www.bominsolar.com/sp
BOOK, THE PHILIPS STIRLING ENGINE ???
http://www.elsevier.nl/inca/publications/store/5/0/4/6/8/3/
BOOK, THERMODYNAMICS AND GAS DYNAMICS OF THE
STIRLING CYCLE MACHINE
http://www.cup.org/Titles/413/052141363X.html
E. SCHMIDT STIRLING ENGINES
Stirling Model Engine Manufacture
Stirling Books, Literature, Drawings, and Plans
Gallery of Model Engines
FOR SALE: Model Engines, Books (long list), Drawings
http://www.rhein-main.com/stirling/
E. SCHMIDT
HOME PAGE
For Sale:
Model Engines
Literature & Books (Long List)
Plans For Some Engines to 300Watt
http://members.aol.com/stirlingde/
EXERGA, PANCAKE SOLAR ENGINE ???
HOME PAGE
Stirling, Joule & Rankine Engines
http://www.exergia.de/wkm/wkm.html
STIRLING ENGINE
Explanation Of Theory & Construction
Mechanical Drawing
PHOTO OF ENGINE
EXTERNAL COMBUSTION ENGINES
HOME PAGE
http://www.geocities.com/yosemite/rapids/2068/index.html
STIRLING ENGINES
5CC DEMO ENGINE
PHOELIX ENGINE
PIGLET ENGINE
WHIPPET ENGINE
WHIGMALEERIE ENGINE
http://www.geocities.com/yosemite/rapids/2068/MC.html
RHOMBIC DRIVE STIRLING
Good close up photos and details
http://www.geocities.com/yosemite/rapids/2068/Rhombic1.html
HORIZONTALY OPPOSED TWIN STIRLING ENGINE
Good close up photos and details
http://www.geocities.com/yosemite/rapids/2068/HOTS.html
STEAM POWERED OUT BOARD ENGINE
Close up photos and details
http://www.geocities.com/yosemite/rapids/2068/TW.html
HISTORY, MIT ME 2.670 STIRLING ENGINE HISTORY
http://me.mit.edu/2.670/Stirl/stirl.html
INTERESTING STIRLING ENGINES SITES AROUND THE WORLD
Links-to many Stirling related sites. (some OK/some not so great)
http://www.cris.com/~Jcrouch/olinks.shtml
JAMES STIRLING, HISTORY
Biography, Formulas, & Numbers
http://www-groups.dcs.st-andrews.ac.uk/~history/Mathematicians/Stirling.html
KOCKUMS
HOME PAGE
This Company Builds Stirlings For 500 Ton French Research
Submarines & The Royal Swedish Navy Submarines.
They Also Builds Automobile Stirling Engines.
Stirling Engines
http://www.kockums.se/
THE STIRLING PAGE
http://www.kockums.se/stirling.htm
KOCKUMS SUBMARINE SYSTEMS
http://www.sds.se/org/kockums/subs.htm
http://www.quicknet.se/home/q-118290/
Lakens hobbypage
http://www.quicknet.se/home/q-118290/
BUILD YOUR OWN STIRLING ENGINE
Pictures, Drawings & AutoCad File (Both Detailed), for 2 engines
LASER - LINEAR ANALYSIS OF STIRLING CYCLE ENGINES
AND REFRIGERATORS
http://bell.mma.edu/~jmcent/laser.html
MALONE MODIFICATIONS - WATER AS WORKING FLUID
This is a unique and different design that may not be completely a Stirling Cycle
http://www.mech.ed.ac.uk/research/wavepower/malone.html
MANUFACTRUE, TAMIN ENTERPRISES
Manufactures a 1KW engine as their smallest, others/larger
are in Design/Development or Testing phases. Nice set of
Pictures, drawings, & descriptions at this site.
Home Page
http://www.tamin.com/index.html
Stirling Engines
http://www.tamin.com/stirling.html
MANUFACTURE, TIAC ???
Moved to Bomin Solar Research
http://www.bominsolar.com/
MICROMINIATURE STIRLING CRYOCOOLERS AND ENGINES
http://www.cns.ohiou.edu/~mcab/
MISER HOT AIR ENGINE
Easy to build, Pancake, model Stirling
Plans Available & so are Hard-To-Find Parts
http://www.ultranet.com/~ginger/miser.htm
MIT ???
STARTING PAGE
http://web.mit.edu/2.670/
TUTORIAL INCLUDING:
Power going to the engine
Heat transfer
LaPlace's Equation
Spreadsheet
Iterative Loops
Incorporating the piston
Calculating the theoretical input power
PANCAKE ENGINE, CHRIS GREVE
Pancake Engine Runs On Top Of Monitor Or In Palm Of Hand
Email for Plans
AVI Movies Of Engine Running
Links
http://ourworld.compuserve.com/homepages/GTD
Prayer Tin Can Engine
Cute Model Engine, Easy To Make
http://www.bobblick.com/bob/stirling/
SIGMA ELEKTROTEKNISK A.S.
"PERSONAL COMPUSTION POWERPLANT"
http://www.sigma-el.com/
PCP1-130
9KW Electric Out Plus Heat Out, 50K Hour Operating Life, Sealed Unit.
http://www.sigma-el.com/pcp130.html
SOLO INNOVATIONS
Builder of 10KW Stirlings For Industrial & Solar Use
http://www.solo-germany.com/english/frames/frame_innovation2.html
Whisper Tech Limited
(MANFACTURES OF STIRLING POWERED ELECTRIC GENERATORS)
HOME PAGE
http://www.whispergen.com/
STEAM & ENGINE OF AUSTRALIA
A NOVEL STIRLING CYCLE HOT AIR ENGINE TO BUILD
Complete Plans/Drawings & Instructions for a Lo-Temp/Pancake Engine
PLANS, INSTRUCTIONS & FULL SIZE DRAWINGS FOR A MODEL "PANCAKE ENGINE"
Simple to construct.
http://www.webmania.com.au/se/info/stirling/buildme.html
http://www.bekkoame.or.jp/~khirata/indexe.htm
MAP OF STIRLING ENGINE HOME PAGE
http://www.bekkoame.or.jp/~khirata/english/s_index.htm
WHAT'S NEW
Links, many new ones and other new info
http://www.bekkoame.or.jp/~khirata/english/what.htm
STIRLING ENGINES FOR BEGINNERS
http://www.bekkoame.or.jp/~khirata/english/begin.htm
VIEW OF MODEL STIRLING ENGINES
Contains Pictures, Descriptions & Mechanical Drawings
http://www.bekkoame.or.jp/~khirata/english/modele.htm
LSE-01
http://www.bekkoame.or.jp/~khirata/english/lse01e.htm
MSE-01
8 cylinder / 2 piston type
http://www.bekkoame.or.jp/~khirata/english/mse01e.htm
MSE-02
5 Watt Class
http://www.bekkoame.or.jp/~khirata/english/mse02e.htm
MSE-03
Variable Phase Angle Stirling Engine
Has 2 counter rotating output shafts
http://www.bekkoame.or.jp/~khirata/english/mse03e.htm
MSE-04
Variable Stroke Engine
http://www.bekkoame.or.jp/~khirata/english/mse04e.htm
MSE-05
http://www.bekkoame.or.jp/~khirata/english/mse05e.htm
ROTARY DISPLACER TYPE STIRLING ENGINE
http://www.bekkoame.or.jp/~khirata/english/rotarye.htm
SECTION OF ROTARY DISPLACER
http://www.bekkoame.or.jp/~khirata/english/rot_se.htm
FREE PISTON TYPE STIRLING ENGINE
Much Info On How It Works
http://www.bekkoame.or.jp/~khirata/english/fpse.htm
BUILDING MODEL STIRLING ENGINES
http://www.bekkoame.or.jp/~khirata/english/make.htm
LET'S BUILD A CAN STIRLING ENGINE
http://www.bekkoame.or.jp/~khirata/english/mk_can.htm
LSE-01
A 2 piston type, can run at 3K RPM
http://www.bekkoame.or.jp/~khirata/english/mk_l01.htm
TSE-03
A 1 hour project
http://www.bekkoame.or.jp/~khirata/english/mk_t03.htm
PLANS OF ROTARY DISPLACER TYPE STIRLING ENGINE
http://www.bekkoame.or.jp/~khirata/english/mk_rot.htm
ESE-10
2 Piston type & runs @ 4K RPM
http://www.bekkoame.or.jp/~khirata/english/mk_e10.htm
GALLERY OF ENGINES
Pictures of several models
http://www.bekkoame.or.jp/~khirata/english/gallery.htm
LINKS - OTHER STIRLING ENGINE WEB SITES
In groups by type of site, Models/Theory/Societies/Etc.
http://www.bekkoame.or.jp/~khirata/english/others.htm
OVERLAP VOLUME OF THE BETA TYPE STIRLING ENGINE
Theory & & Gas Flow In A Beta Engine
http://www.bekkoame.or.jp/~khirata/overlap/overlape.htm
HOME PAGE, ACADEMIC EDITION - UNDER CONSTRUCTION AS OF 6/98
http://www.bekkoame.or.jp/~khirata/academic/indexe.htm
DESIGH & PREFORMANCE PREDICTION METHODS FOR MINIATUREZED STIRLING ENGINE
http://www.bekkoame.or.jp/~khirata/academic/docpaper/indexe.html
STIRLING ENGINES OF SAITAMA UNIVERSITY
http://www.bekoame.or.jp/~khirata/academic/kinki/home.html
BUILDING OF MODEL STIRLING ENGINE
Plans & Instructions
http://www.bekkoame.or.jp/~khirata/academic/seminar/indexe.html
Intro.
5 Low Temp Differential Stirling Engines To 1KW Class
3 Hi Temp Differential Stirling Engines
The One Way Piston Ring
Analysis of Stirling Engines & Analysis Software
Model Engines Made By Staff & Students ???
http://www.bekkoame.or.jp/~khirata/academic/kinki/home.html
ECOBOY-SCM81 - 100 WATT CLASS STIRLING ENGINE
Several Developmental Situations
http://www.bekkoame.or.jp/~khirata/academic/kinki/indexe.html
SCHMIDT THEORY FOR STIRLING ENGINES
The Theoretical Thermodynamic Model For Starlings
http://www.bekkoame.or.jp/~khirata/academic/schmidt/schmidt.htm
SIMPLE PREFORMANCE PREDICTION METHOD FOR STIRLING ENGINE
http://www.bekkoame.or.jp/~khirata/academic/simple/simplee.htm
STIRLING TECHNOLOGY @ NASA's POWERWEB
Lots of links and Info on Stirling Cycle Stuff
HOME PAGE
http://powerweb.lerc.nasa.gov/stirling/home.html
THE STIRLING CYCLE -DESCRIPTION W/PV CURVES
http://powerweb.lerc.nasa.gov/stirling/DOC/strlcycl.html
SOLAR STIRLING
http://powerweb.lerc.nasa.gov/stirling/DOC/ascs.html
LARGE FREE-PISTON STIRLING ENGINES, 12.5 KW/CYLINDER
http://powerweb.lerc.nasa.gov/stirling/DOC/lrgfp.html
SMALL RADIOISOTOPE STIRLING ENGINES
http://powerweb.lerc.nasa.gov/stirling/DOC/comptech.html
STIRLING PERFORMANCE CODES
http://powerweb.lerc.nasa.gov/stirling/DOC/codes.html
STIRLING THERMODYNAMIC LOSS RESEARCH AND CONE DEVELOPMENT
http://powerweb.lerc.nasa.gov/stirling/DOC/osflow.html
AUTOMOTIVE STIRLING ENGINE DEVELOPMENT PROJECT
http://powerweb.lerc.nasa.gov/stirling/DOC/ase.html
POWER TECHNOLOGY EARTH APPLICATIONS
http://powerweb.lerc.nasa.gov/DOC/earth-apps.html
SUMMER GAMES '96
Stirling/Dish technology used at the 96 Olympics - nothing great
http://www.nrel.gov/data/pix/olympic/olym2.htm#Stirling
SUNPOWER INC. ???
HOME PAGE
Has several papers, pictures/schematic, brochures online
http://www.sunpower.com
BOOK LIST
List 70 text
http://www.sunpower.com/pubs.html
TERA.MECH.SAITAMA-U.AC.JP/KIRIKI, PAGE 1 OF 2 ???
HOME PAGE
http://tera.mech.saitama-u.ac.jp/kiriki/home.html
WHAT'S NEW
http://tera.mech.saitama-u.ac.jp/kiriki/new.html
INTRODUCTION FOR BEGINNERS
A very complete introduction and history (to the present) of the
Stirling Cycle & it's implementations
http://tera.mech.saitama-u.ac.jp/kiriki/begin/index.html
LOW TEMP DIFFERENCE ENGINES
300 W CLASS LOW TEMPERATURE DIFFERENCE STIRLING ENGINE
W/plans, documentation, etc.
http://tera.mech.saitama-u.ac.jp/kiriki/yama1/
10 W CLASS LOW TEMPERATURE DIFFERENCE STIRLING ENGINE
With drawings & specks.
http://tera.mech.saitama-u.ac.jp/kiriki/10wse/index.html
SOLAR STIRLING ENGINE'S PAGE
With drawings & specks.
http://tera.mech.saitama-u.ac.jp/kiriki/solar/index.html
HIGH TEMP DIFFERENCE ENGINES
VERTICAL 2 PISTON TYPE STIRLING ENGINE (1OO WATT CLASS)
http://tera.mech.saitama-u.ac.jp/kiriki/nse/index.html
STIRLING ENGINE FOR USING EXHAUST GAS
http://tera.mech.saitama-u.ac.jp/kiriki/exhaust/index.html
DRAWING & SPECIFICATIONS FOR ABOVE
http://tera.mech.saitama-u.ac.jp/kiriki/exhaust/kozo.html
HORIZONTALLY OPPOSED TYPE STIRLING ENGINE
http://tera.mech.saitama-u.ac.jp/kiriki/expse/index.html
100 W CLASS SMALL STIRLING ENGINE
http://tera.mech.saitama-u.ac.jp/kiriki/ecoboy/index.html
THE ONE WAY PISTON RING
This ring has little friction & little leakage
http://tera.mech.saitama-u.ac.jp/kiriki/ring/index.html
ANALYSIS OF STIRLING ENGINES
http://tech.mech.saitama-u.ac.jp/kirki/analysis/index.html
ANALYSIS PROGRAMS
http://tera.mech.saitama-u.ac.jp/kiriki/programs/index.html
MODELS - 6 VARIOUS MODELS OF THE STIRLING ENGINE
http://tera.mech.saitama-u.ac.jp/kiriki/models/index.html
MODELS - STUDENT WORKS 1996
http://tera.mech.saitama-u.ac.jp/kiriki/1996/index.html
LINKS
http://tera.mech.saitama-u.ac.jp/kiriki/links/index.html
THE 1ST STIRLING ENGINE TECHNO-RALLY
http://tera.mech.saitama-u.ac.jp/kiriki/tecno/index.html
INTRODUCTION OF OUR LABORATORY
http://tera.mech.saitama-u.ac.jp/kiriki/staff/index.html
TEST-TUBE STIRLING ENGINE
STARTING PAGE
Description of operation, Photos & Sketches, Etc.
http://www.webcom.com/sknkwrks/stirling.htm
THE LITTLE ENGINE PAGES
HOME PAGE
http://www.geocities.com/CapeCanaveral/Launchpad/5465/
MY ENGINES
Pictures & Detailed Info On Engines He Designed/Made
Includes Free Piston Stirling Engine & Flame/Vacuum Engine
http://www.geocities.com/CapeCanaveral/Launchpad/5465/engines.html
RICHARD'S ENGINES
2 Cylinder Stirling Using A Modified Scotch Yoke Linkage
http://www.geocities.com/CapeCanaveral/Launchpad/5465/richard.html
ENGINES THAT OTHERS HAVE BUILT
Some Nice Work & Unique Designs
One is built from a Hard Disk Drive
http://www.geocities.com/CapeCanaveral/Launchpad/5465/oth_eng.html
STIRLING ENGINE REFERENCES
Book List
http://www.geocities.com/CapeCanaveral/Launchpad/5465/reference.html
LINKS
http://www.geocities.com/CapeCanaveral/Launchpad/5465/links.html
THE MAD SCIENTIST'S LAIR
HOME PAGE
http://www.iinet.com.au/~steveb/
STIRLING CYCLE DEVICES
http://www.iinet.com.au/~steveb/stirling/st_eng.html
STIRLING CYCLE PUMP
http://www.iinet.com.au/~steveb/stirling/st_pump.html
A STIRLING CYCLE PUMP & A STIRLING CYCLE LIQUID PISTON MOTOR
from Popular Science, January 1975. Pictures, Descriptions, and Info on:
Stirling Cycle Pump - Magazine Reprint
Stirling Cycle Engine - Hi Power Out Put
http://www.iinet.com.au/~steveb/stirling/stirling.html
TUTORIAL, USING SPREADSHEETS AND XESS
This is a tutorial that goes through the thermal dynamics of a Stirling Engine
http://me.mit.edu/2.670/Tutorials/Xess/lecture/index.htm
Stirling Engine Society USA
http://sesusa.hypermart.net/
WRENCH TEN'S STUDY OF EXTERNAL COMPUSTION ENGINES
HOME PAGE
http://www.geocities.com/Yosemite/Rapids/2068
STEAM POWERED OUT BAORD FISHING ENGINE
http://www.geocities.com/Yosemite/Rapids/2068/TW.html
STIRLING ENGINES CREATED BY MICK COLLINS (6 ENGINES)
http://www.geocities.com/Yosemite/Rapids/2068/MC.html
RHOMBIC DRIVE STIRLING ENGINE
http://www.geocities.com/Yosemite/Rapids/2068/Rombic1.html
HORIZONTALLY OPPOSED TWIN STIRLING
http://www.geocities.com/Yosemite/Rapids/2068/HOTS1.html
V-TWIN SCOTCH YOKE STIRLING
http://www.geocities.com/Yosemite/Rapids/2068/Rosinante1.html
TIN CAN & RUBBER DIAPHRAM STIRLING
http://www.geocities.com/Yosemite/Rapids/2068/LBQuartz.html
COLLECTION OF OTHER'S STIRLING ENGINES, MODELS & FULL SIZE
http://www.geocities.com/Yosemite/Rapids/2068/KB.html
Bohm Stirling Engines
High End Stirling Engine Models.
http://www.stirling-technik.de/index.html
BOEHM & DAUM GERMANY
Model Engines, Good Pictures.
http://www.sendner.com/stirling/index.htm
Stirling-Motoren
In German
http://www.solnet.ch/stirling/
DS Stirling Cycle Page
By Dustin Symanski
http://www.symanski.net/
Stirling Cycle Engines
By Robert P. Nederpelt
He put a Stirling Fan at the prime focus of a dish
http://www.starwon.com.au/~rpned/index.html
http://www.starwon.com.au/~rpned/stirling_engines.html
thermoacoustic
Thermoacoustic Stirling Engine
Backhaus-Swift engine
Department of Energy's Los Alamos National Laboratory
Energy-efficient engine with no moving parts.
Looks like a metal baseball bat.
http://www.lanl.gov/worldview/news/releases/archive/99-084.html
http://www.newpower.org/xnews/99/05/283.shtml
http://www.newpower.org/xnews/99/06/011.shtml
http://unisci.com/stories/19992/0527991.htm
http://www.newswise.com/articles/1999/5/ENGINE.LAL.html
http://www.sciencedaily.com/releases/1999/05/990527043210.htm
http://www.redrok.com/neat.htm#stirling
http://www.redrok.com/neat.htm#US5901556
http://www.redrok.com/neat.htm#US4953366
The Stirling Outlet
By Robert P. Nederpelt
He put a Stirling Fan at the prime focus of a dish
http://members.aol.com/tstirlingo/
Myranda, a Stirling powered desk fan kit.
http://members.aol.com/tstirlingo/tsokg.htm
Luffin, a low temperature differential Stirling motor.
http://members.aol.com/tstirlingo/tsokg.htm
Schlaich Bergermann und Partner
7.5m streatched membrain dish driving a solar sterling engine.
http://www.sbp.de/solar/stirling/
thermoelectric
Thermoelectric generator.
thermionic
Thermionic generator.
Noble Physics 1928
The prize was reserved and awarded in 1929 to:
Richardson, Owen Willans, Sir, Great Britain,
b. 1879, d. 1959,
London University,
"for his work on the thermionic phenomenon and especially for the discovery of the law named after him".
* Borealis Technical Limited. The major breakthrough is in improving the efficiency and cost reduction of the devices. Their devices have efficiencies approaching 20%.
kornich
Kornich Discrete Power Converter - Source of Renewable Energy
|
This is new patented technology
You can obtain without electricity and fuel:
It may be as a fluid or a free-flowing mass as natural or artificial origin. Alex Kornich <alex.kornich@home.com>; <alex_kornich@yahoo.com> |
Schematic of a Self Excited Single Phase AC Induction Generator built from a 3Ø AC induction Motor. This schematic is for a 50Hz 220VAC application.
While these generators look quite simple they do require careful planning and design. The primary problem is choosing the required shunting capacitors.
smith "Motors as Generators for Micro-Hydro Power" This book is packed full of practical, hands on, real world construction advice and still technical enough for one to be able to design and trouble shoot your own system.
Thank you Nigel.
Here is a link to another reference on induction generators (in Adobe PDF form): And another by Joe Cole: And yet another: None of these links work anymore.
BUILDING A PHASE CONVERTER PHASE CONVERTERS and STARTING CIRCUITS Understanding and Selecting a Phase Converter The Homebuilt Dynamo: Dynamo Design and Construction with Ceramic Magnets This is one of the most comprehensive books on the construction of alternators I know about.
* Portable Lightplants and Generators.
woodmill
The best book I have found for designing and correcting induction motors for use as induction generators is a small book:
Nigel Smith <nigel.smith@clara.net>
Intermediate Technology Publications Ltd.
103-105 Southampton on Row
London WC1B 4HH, UK.
ISBN 1 85339 286 3
82 Pages
Printed in the UK by The Russell Press Ltd.
* Operating 60 cycle induction generators.
* Wiring schematic.
* Capacitor selection chart.
* Micro-Hydro Power.
A fairly through explanation of Induction Generation along with the Ossberger A-Regulator.
* Portable Lightplants and Generators.
* An Easy to Build and Operate Induction Generator.
converter
motor
Run 3Ø AC Induction Motors on Single Ø and Starting Circuits.
Includes Self Starting
By Jim Hanrahan
* Building a phase converter.
Includes Self Starting.
This page also has several possible motor connection diagrams.
This page contains links to several circuits for building phase converters and magnetic starters.
by George Carlson
* Phase Converters and Starting Circuits.
by Gary A. Werner, President GWM Corporation
* Phase Converters.
alternator
Some Alternator information.
by Alfred T. Forbes
* $65us (includes USA shipping) 182 pages (hard cover book), over 300 illustrations and photographs.
* All Wooden Wind Generator.
intertie
netmetering
Grid Intertie Documentation.
| * FERC Federal Energy Regulatory Commission Fow to get started |
Parallel Operation of Customer-Owned Generation
Revision 2, July 1999
Northern States Power Company
| * NSP Intertie Document Beware! This page takes a long time to load. |
|
| * NSP Intertie Document The whole scanned document in .ZIP form, about 9MBytes. |
| * Home Power Net Metering laws by state. |
| * Omnion Power Omnion Power Engineering Corporation has been developing advanced power systems, power system components, and system controls since 1971. |
| * SymCom Motor Saver Model 601 is a fully programmable electronic voltage monitor designed to monitor three phase systems. |
| * Watt-hour Meter Maintenance And Testing Watt-hour Meter Operating Principles And Construction * Bureau of Reclamation |
| * Forcefield Sellers of all ckinds of permanent magnets |
