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Recommended steam turbine

Monday, January 23, 2017   By: steamer [2050] 1 Stars
Hello, and thank you for reading my post. I am in the process of designing a Co gen system. This will include a low pressure multi fuel gasifying steam boiler that will run a turbine, 2 kw permanent magnet motor or the like, a 3 kw inverter that will power only the high energy use appliances as needed like dish and clothes washer, air conditioner and also charge small battery bank at night when solar panels are not feeding. The battery bank will be big enough to power lights, fans and small to medium electronics for at least a couple days on full charge. The steam after or by passing the turbine will feed the radiators upstairs and the return condensate will feed a floor hydronic heating system in the basement. My main focus is on a turbine and generator that will supply 2kw nominally. Any recommendations on these 2 components?

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Sunday, January 29, 2017   By: old timer [21] 4 Stars
Nice conceptual proposal. Examine your loads better. Little steam turbines are not efficient. Consider using a different medium other than water in boiler.

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Monday, January 30, 2017   By: steamer [2050] 1 Stars
Thanks for replying to my post! I was planning on using a anti-freeze mixture what would you suggest? What do you think the smallest turbine that Has a good efficiency?

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Tuesday, January 31, 2017   By: old timer [21] 4 Stars
Not sure about glycol water mixture to boil let alone turn a small steam turbine. Focus on compounds with the right boiling point and that are intrinsically safe. Tiny steam turbines or very small steam turbines are not efficient, and choosing one over another for efficiency seems funny since they are not chosen for efficiency but for a need or application. I do not know if they are made anymore under 25 kw. Good luck.

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Wednesday, February 01, 2017   By: steamer [2050] 1 Stars
I have been researching other medium options, but the only other thing I have found for steam boilers so far that is proven safe and not destructive is pre treated water. Maybe there is a mixture of water and something else. If anybody has any mixes, please chime in. The reason I am considering a larger/more efficient turbine is because I would be willing to use the increased amount of power available by running all the loads I planned on on using one at a time on the small turbine, and running them all at the same time instead. Maybe a turbine isnt practical for my needs. Maybe I should just build a hot water boiler to heat my home and a much larger battery bank and solar array to power everything else. Any thoughts?

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Wednesday, February 01, 2017   By: old timer [21] 4 Stars
What do you consider a small turbine?

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Thursday, February 02, 2017   By: steamer [2050] 1 Stars
One that can run a to kw generator.

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Thursday, February 02, 2017   By: steamer [2050] 1 Stars
2 kw generator*

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Thursday, February 02, 2017   By: old timer [21] 4 Stars
Well a tiny steam microturbine of 2kw is definitely not going to be efficient with steam. Maybe there s someone else who has more experience with micro turbines using steam or other fluid.

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Friday, February 03, 2017   By: steamy [2050] 1 Stars
Thanks for all your insight old timer! if you have any new thoughts, questions or ideas, please share :

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Is Cp/Cv applicable to steam to calculate?
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The reason that isobaric Cp heat capacity is greater than isometric Cv is that isobaric involves expansion. Remember our atmosphere has mass, so in order for a system to expand it must displace that mass. And this requires work. So Cp requires work plus the energy to heat the gas , while Cv only requires the energy to heat.

So for all gases and/or steam the work required to expand a given volume is the same that being the work required to displace our atmosphere by a given volume.

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