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Author Topic: Water Source Heat Pump Project  (Read 5927 times)
nowty
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« Reply #45 on: October 10, 2018, 11:10:26 AM »

Nice job!!   genuflect
I like the use of coloured cable ties for identifying the flows, I'm going to replace all the bits of scribbled-on tape now. Smiley

Ah yes I should have provided a key, hysteria

Red = Hot Water
Blue = Cold Water
Yellow = Heating Flow
Green = Heating Return
Red/Blue = Pre heated water from unvented tank as it could be hot or cold.
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10kW of PV installed and 45+ MWh generated.
Usable battery storage of 50+ kWh.
Heat storage of 25+ kWh.
6kW Ground Source Heatpump.
200,000+ litres of water harvested from underground river.
A few cold frames and raised beds.
nowty
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« Reply #46 on: October 10, 2018, 11:18:02 AM »

My main point in posting relates to the inevitable narrowing of E7 prices as time goes on. It doesn't take a genius to work out that as more use is made of cheap E7 rate electricity the cost will go up thus reducing the level of savings we all carefully calculate in advance as part of the argument for making the changes we do.

Yes, in the past E7 night rate used to be less than half price but now it is normally more than half price and usually with high standing charges.

I suspect that in future with more Solar in day, expensive Nuclear plants come on stream, more overnight use for domestic batteries and EVs it might narrow even more. But I think we will inevitably be in a situation where peak early evening costs will be prohibitably higher making domestic batteries possibly viable for the masses even if you don't have any PV.
« Last Edit: October 10, 2018, 01:12:53 PM by nowty » Logged

10kW of PV installed and 45+ MWh generated.
Usable battery storage of 50+ kWh.
Heat storage of 25+ kWh.
6kW Ground Source Heatpump.
200,000+ litres of water harvested from underground river.
A few cold frames and raised beds.
nowty
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« Reply #47 on: October 19, 2018, 06:13:01 PM »

Project Update


I have yet to wire up the thermostats, etc, but I tested the heat pump today with all the plumbing complete and solely powered by PV with the autumn sunshine on both my new hot water tank and my central heating.




Works fine, ran it constantly for 3 hours, first heated 300 litre tank to about 50 degrees in around two hours and then I ran it on the heating circuit and house was very toasty. All radiators heated up to 35 degrees in little time.




Ground loop stayed several degrees above zero throughout and difference in flow and return temps for both ground and heating loops was 4 degrees.
So ground loop is big enough, water pump size is ok and I definitely do not need a buffer tank. Very happy. ralph
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10kW of PV installed and 45+ MWh generated.
Usable battery storage of 50+ kWh.
Heat storage of 25+ kWh.
6kW Ground Source Heatpump.
200,000+ litres of water harvested from underground river.
A few cold frames and raised beds.
biff
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An unpaid Navitron volunteer who lives off-grid.


« Reply #48 on: October 19, 2018, 06:59:57 PM »

Well done Nowty,
            This is a great help to the members like me who are considering like minded projects.
                                                Biff
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An unpaid Navitron volunteer,who has been living off-grid,powered by wind and solar,each year better than the last one.
Nickel2
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Method mixed with Madness


« Reply #49 on: October 19, 2018, 08:21:29 PM »

Great Admiration! When life gives you lemons, forget lemonade, hold a cocktail party. I'd love to be in your position, but without the pre-courser stress of using your house foundations as a surfboard on the River Styx.
My your sun shine bright and your river flow clear for ever! genuflect
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1.140kW mono south-facing at 49*
EpEver 4210A at 24v
24V 400 Ah battery. (4x200Ah FLA)
EpEver STI1000-24-230 pure sine inverter
Of course it'll work. (It hasn't caught fire yet).
todthedog
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« Reply #50 on: October 20, 2018, 06:44:45 AM »

A fantastically​ interesting thread.
An example on how to turn a potential disaster into a long term benefit.
As well as having us on the edge of our seats along the way. genuflect genuflect genuflect
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offthegridandy
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« Reply #51 on: October 20, 2018, 06:41:40 PM »

Thanks for sharing all  this and brilliant result.
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8 KVA Lister TS2 Startamatic Genny
24 Volt 1000amp battery bank
Outback VFX3024
4.6 Kw PV array permanently ground mounted
Outback Flexmax 80
2 X Flexmax 30 PV CC
0.75 Kw wind turbine H Piggot design 2.4 Mtr Dia
12 Mtr lattice Tower.
u/floor heating from oil boiler cross linked to 12 Kw WBS
desperate
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Backache stuff!!


WWW
« Reply #52 on: October 20, 2018, 07:11:45 PM »

A fantastically​ interesting thread.
An example on how to turn a potential disaster into a long term benefit.
As well as having us on the edge of our seats along the way. genuflect genuflect genuflect

Same as that, had me bricking it when you were underground, but  genuflect  ....nuff said Smiley

Desp
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www.jandhbuilders.co.uk

still a crazy old duffer!
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