Steam Engine/Correspondence
Letter to VK Desai of Tinytech Plants (Tinytech are an Indian company that make steam engines)
Dear VK,
Can you share your knowledge of steam power with us?
In order to make our solar turbine a success, we need to build the steam engine at low cost - in house. If I do my own labor, use our machine shop, and use casting in house, then the price for the engine parts should be about $150 for a 3 hp engine. Do you think that is realistic?
Please share with me your basic design. Simple drawings on the back of an envelope would do. I am smart at studying design. Please just give me the essentials and material specifications.
Please respond, or put your notes up directly at:
http://openfarmtech.org/index.php?title=Steam_Engine_Construction_Set
If you have any pictures of steam engines in fabrication, please share.
Sincerely,
Marcin
Response from Mike Brown Steam engines
Nick,
Skip Goebel is in Peru, do you have the DVD he did on building a prototype boiler?
I doubt if your solenoid valve will last six months on a steam engine.
Sorry, we don't get involved in other people's engineering projects (we average two emails like yours a day).
Best wishes, Mike
nick wrote:
Mr. Brown,
I have been working lately on developing a simple horizontal uniflow steam of 3" x3.5" bore and stroke that is controlled by an electronic solenoid valve and a small programmabale logic controller. My full intention is to power this engine with a gasifier monotube style boiler and utilize the exhaust in a 750 gallon thermal storage tank for home heating purposes. In my research in this project I found reference to Skip Goebel's work through your site.
that Skip Goebel may already be building a boiler of similar design, if possible could you give me his contact info? I would also be interested to know if you have given any thought to developing an electronically valved steam engine? I intend to try an asco 1/2" direct acting steam valve that claims to cycle at 800cycles/min for a million plus cycles. I intend to run my engine at 100rpm which in theory may give my controll of the cutoff ratio in increments of .25. This obviously will not be efficient but I want to try the concept first. Perhaps you know more about what this actually would take? In any case I do appreciate your time to read this email and I hope you keep up the good work in small scale steam power development.
Sincerely,
seek out mike brown steam engins on google
Skip Goebel Sensible Steam Peru s.a.c. Lima, Peru Lima 51 996 984 741 US· 559 922 2410 www.sensiblesteamperu.com
To: info@sensiblesteamperu.com Sent: Monday, January 26, 2009 10:22:16 AM Subject: Wood Fired Monotube Boiler
I came across your site in studying the works of Skip Goebel in home powered steam systems. I intend to build a 3kW cogeneration DC system for home and experimental use. All my research leads me to conclude that Mr. Goebel may have pioneered this idea the furthest and I would be interested in purchasing any information that he has made available on the subject.
I'm not unfamilar with steam, I worked 2 years as Mechanical Engineer at a 400MW coal fired power plant, but am now envisioning working on something a little more decentralized. In any case I strongly feel the case for more self sufficient energy systems is here and given the fuel flexibility and reliability of the steam engine I wish to pursue this idea further. My plan is to construct a simple monotube fired 3kW mechanical valve steam engine to charge my DC battery bank and thermal storage tank. After I am comfortable with this design I would like to investigate the potential improvements of using a low cost programable logic controller for boiler control. Additonaly I am looking for a a high speed durable solenoid valve and the right steam valve to investigate the possibility of electronically conrtolling steam into the engine.
Right now I am thinking that I could use a control loop to continously vary the cutoff ratio of the steam engine for my governor. This would optimize efficiency by running with the lowest allowable cutoff ratio. In any case it seems at least feasible to think that in the future steam engines efficiencies can be improved by better steam control which is one more reason that this technology attracts me. So if Sensible Steam has any information avaialable by Skip Goebel on steam engine system construction and experiences with it I would be very eager to hear more about it how to get it.
Sincerely,
Letter to Valve manufacturer; We do not have any valves capable of handling 600F steam.
Alan Nelson, Fluid Process Control Corporation
Sent: Saturday, January 31, 2009 12:30 PM To: Alan Nelson Subject: Atkomatic Solenoid Valve Response Times
Alan, I am looking at your atkomatic line of solenoid valves and would like to know if you offer anything suitable for the a 2-way continous duty pulse cycle valve for saturated steam up to 600 deg. The valve also needs to have a very fast response time of 75ms for open and 75 ms for close. Is there anything in the atkomatic line that might fulfill that response time requirement? If not do you know what other type of valve I might try looking at for that desired response time? Thank you for your time.
Regards, Marcin Jakubowski