Comments on: Organic Rankine Cycle http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/ Mike Harding's Blog Thu, 08 Jan 2009 00:23:39 +0000 http://wordpress.org/?v=2.6.1 By: esad http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/#comment-34527 esad Tue, 11 Mar 2008 07:42:52 +0000 http://www.montaraventures.com/blog/?p=246#comment-34527 Hi, I am Esad, working on ORC in Bosnia for my postgraduate study. Can anyone please provide my with proper explanation on this: I read from many ORC related articles that ORC working fluids should have a high molecular weight to avoid the need for high turbine rotational speed. I do not understand it well, how the molecular weight of organic fluid relates to low rotational speeds? Thanks Esad Hi,
I am Esad, working on ORC in Bosnia for my postgraduate study.

Can anyone please provide my with proper explanation on this:
I read from many ORC related articles that ORC working fluids should have a high molecular weight to avoid the need for high turbine rotational speed.

I do not understand it well, how the molecular weight of organic fluid relates to low rotational speeds?

Thanks

Esad

]]> By: Daniel Steinert http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/#comment-13407 Daniel Steinert Sat, 05 May 2007 17:57:00 +0000 http://www.montaraventures.com/blog/?p=246#comment-13407 I am searching for a method of "screening for optimal working fluids for ORC-technology". Can anyone send me some information upon. Thank you I am searching for a method of “screening for optimal working fluids for ORC-technology”. Can anyone send me some information upon. Thank you

]]> By: Richard Biddle http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/#comment-5954 Richard Biddle Thu, 08 Feb 2007 14:44:42 +0000 http://www.montaraventures.com/blog/?p=246#comment-5954 Suspect you have misunderstood gross heat power reqd for purecycle, and , if it is on the market yet , it certainly isn't at 50 hz, which is mandatory for Europe. Furthermore the refrigerant used is very strictly controlled in thee EEC. You may care to look at Freepowers web site, pretty hard work at present , but about to be rebuilt, and at least the ORC is built in UK. There is a downrated 120 kW system and a 50/60 kWe system coming on stream at the end of the year. They are very compact, easily forkliftable and about the most efficient available anywhere. Suspect you have misunderstood gross heat power reqd for purecycle, and , if it is on the market yet , it certainly isn’t at 50 hz, which is mandatory for Europe. Furthermore the refrigerant used is very strictly controlled in thee EEC.
You may care to look at Freepowers web site, pretty hard work at present , but about to be rebuilt, and at least the ORC is built in UK. There is a downrated 120 kW system and a 50/60 kWe system coming on stream at the end of the year. They are very compact, easily forkliftable and about the most efficient available anywhere.

]]> By: mike http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/#comment-5535 mike Sun, 04 Feb 2007 15:59:29 +0000 http://www.montaraventures.com/blog/?p=246#comment-5535 John, I'd suggest you look at the Pure Play 280 units from United Technologies (UTC.) They generate gross 280kw and net of parasitic load 240kw. Effectively, the unit is an industrial chiller run in reverse. Up to 40 can be ganged into a pod - sounds like you'd need 2 units. The only gotcha I can think of is access to water for cooling the working fluid during the cycle. If you have access to water though it should work out. The good thing about the water is that it simply runs through a heat exchanger, so there's no pollution added in the process and can be reused on the other side. Good luck. John, I’d suggest you look at the Pure Play 280 units from United Technologies (UTC.) They generate gross 280kw and net of parasitic load 240kw. Effectively, the unit is an industrial chiller run in reverse. Up to 40 can be ganged into a pod - sounds like you’d need 2 units.

The only gotcha I can think of is access to water for cooling the working fluid during the cycle. If you have access to water though it should work out. The good thing about the water is that it simply runs through a heat exchanger, so there’s no pollution added in the process and can be reused on the other side.

Good luck.

]]> By: John Atkins http://montaraventures.com/blog/2006/12/13/organic-rankine-cycle/#comment-5506 John Atkins Sun, 04 Feb 2007 08:10:41 +0000 http://www.montaraventures.com/blog/?p=246#comment-5506 I have a 500kw biomass district heating plant fired with virgin woodchip in England Can anyone point me toward a manufacturer of a system that would allow me to generate electricity and provide CPH on this sort of scale. Thanks I have a 500kw biomass district heating plant fired with virgin woodchip in England
Can anyone point me toward a manufacturer of a system that would allow me to generate electricity and provide CPH on this sort of scale.
Thanks

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