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Excess DHW heat to generate electricity | 34 comments (34 topical, editorial)

Re: Excess DHW heat to generate electricity (3.00 / 0) (#3)
by wdyasq on Sat Mar 29th, 2008 at 04:52:18 AM MST
(User Info)

Damon,
The second part is known as a 'Rankin Cycle' engine and the entire thing is waiting for someone to only figure out how to eliminate friction to make it practical. The 60C is a 'low delta'. The collection and dissipation devices will need to be quite large to overcome the inefficiencies. BUT-it has been demonstrated on a larger scale. AND - no, I'm not going to look up the examples.

Ron
Adventure is just bad planning." -- Roald Amundsen

Re: Excess DHW heat to generate electricity (3.00 / 0) (#4)
by DamonHD (d@hd.org) on Sat Mar 29th, 2008 at 06:27:41 AM MST
(User Info) http://www.earth.org.uk/

Thanks for the Rankin Cycle clue.

Googling already!

Rgds

Damon

[ Parent ]

Re: Excess DHW heat to generate electricity (3.00 / 0) (#5)
by DamonHD (d@hd.org) on Sat Mar 29th, 2008 at 07:32:38 AM MST
(User Info) http://www.earth.org.uk/

A smaller version of the Rankine machine in yourownpower.com looks possible in principle, and I've seen a number of other suggestions that solar thermal plus heat engine of some sort should beat solar PV in terms of overall efficiency and cost.

So perhaps a very small geothermal power unit which is designed for these sorts of temperatures and low-delta-Ts might be the most practical to avoid much re-engineering.

Rgds

Damon

[ Parent ]

Excess DHW heat to generate electricity | 34 comments (34 topical, 0 editorial)

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