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Blinking big heat pump
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tahir



Joined: 28 Oct 2004
Posts: 45389
Location: Essex
PostPosted: Tue Mar 10, 15 12:00 pm    Post subject: Reply with quote
    

dpack wrote:
if the electricity for the pumps was from tidal would it be an energy neutral system?


I guess so

dpack



Joined: 02 Jul 2005
Posts: 45384
Location: yes
PostPosted: Tue Mar 10, 15 12:05 pm    Post subject: Reply with quote
    

im sure a huge chunk of the global population live close to suitable big water .

what nice tech

Behemoth



Joined: 01 Dec 2004
Posts: 19023
Location: Leeds
PostPosted: Tue Mar 10, 15 12:38 pm    Post subject: Reply with quote
    

I'm wondering about it's economic scalability and application by the water industry. We already use sludge as fuel, would be nice to use the cold water entering treatment works to power them.

vegplot



Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
PostPosted: Tue Mar 10, 15 12:41 pm    Post subject: Reply with quote
    

Nice system and a good demonstrator of a large scale application.

dpack



Joined: 02 Jul 2005
Posts: 45384
Location: yes
PostPosted: Tue Mar 10, 15 12:43 pm    Post subject: Reply with quote
    

i suspect the max temp of the transfer gas(nh3) which is 120c in this kit would be too low for efficient steam generation (for leccy) .

i assume the water industry uses gravity to shift liquids ,i would think that the moving water tech would be one way to get leccy

tahir



Joined: 28 Oct 2004
Posts: 45389
Location: Essex
PostPosted: Tue Mar 10, 15 12:46 pm    Post subject: Reply with quote
    

Behemoth wrote:
I'm wondering about it's economic scalability and application by the water industry. We already use sludge as fuel, would be nice to use the cold water entering treatment works to power them.


You must have potential for heat exchange all over the place

Behemoth



Joined: 01 Dec 2004
Posts: 19023
Location: Leeds
PostPosted: Tue Mar 10, 15 12:52 pm    Post subject: Reply with quote
    

Might be able to sell heating to locals though?

We do use gravity where possible but there's a lot of mechanical equipment and people in flat places that requires power and pumping. We have investigated in line turbines on gravity fed supplies in pennines etc but returns at great and it can affect the pressure of supply. Raw water transfer systems may offer more potential but the Victorians generally designed them with low gradients. We are putting some hydro trubines in when some remedial work is done on the weirs on the river aire which will allow migratory fish up it again. Have you seen the new wid turbine in East Leeds?

dpack



Joined: 02 Jul 2005
Posts: 45384
Location: yes
PostPosted: Tue Mar 10, 15 2:37 pm    Post subject: Reply with quote
    

selling heating to locals might be a good idea ,all the hot bathwater etc is under their homes so the heat is quite local to the consumer and if the kit could be developed to work in a main sewer getting some of the energy back might be possible

Nick



Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
PostPosted: Tue Mar 10, 15 8:50 pm    Post subject: Reply with quote
    

Falstaff wrote:
Ammonia @ 120 degrees C and 50 Bar (700 lbs/sq inch)

Don't want any "Gas-safe plummers" working on THAT !


Because they're Polish?

Mistress Rose



Joined: 21 Jul 2011
Posts: 15542

PostPosted: Wed Mar 11, 15 8:21 am    Post subject: Reply with quote
    

Interesting article. There is a lot of potential for extracting heat from 'waste' from all sorts of systems, and I think this is often preferable to extracting it from ordinary water, both in terms of efficiency and ecological effects. It is well known that dischargin warm water affects the ecology of an area, and extracting too much heat must have an effect too. Where you have tidal flow, such as London, or a large volume of water running out of a river, this would be far less marked though.

mal55



Joined: 15 Jul 2009
Posts: 168
Location: Erewash or in the dog house
PostPosted: Wed Mar 11, 15 12:47 pm    Post subject: Reply with quote
    

It seems a pretty good idea to me. The Norwegians are also looking at producing electricity using the interface between saline and fresh groundwater. That would give them practically free heat once the system was in place.

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4562
Location: Lampeter
PostPosted: Wed Mar 11, 15 4:14 pm    Post subject: Reply with quote
    

Does make you think why they still mine coal near the artic circle,in a big way.

dpack



Joined: 02 Jul 2005
Posts: 45384
Location: yes
PostPosted: Wed Mar 11, 15 4:44 pm    Post subject: Reply with quote
    

you cant make steel with heat pumped heat.

coal to coke +iron ore is one of the reasons coal is popular in sweden

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4562
Location: Lampeter
PostPosted: Wed Mar 11, 15 4:54 pm    Post subject: Reply with quote
    

Agree,but they also export a lot of it as well,

And considering the conservation area its mined in,one would think it was better to obtain it from the other side of the World[as we do] where Green issue`s don`t come into it.

dpack



Joined: 02 Jul 2005
Posts: 45384
Location: yes
PostPosted: Wed Mar 11, 15 5:12 pm    Post subject: Reply with quote
    

Sweden first hadeeth Sweden green


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