Ground Source Heating
- Thread starter Old Tup
- Start date
24/7 farming
Member
- Location
- Donegal
I'm heating a 250sqm new build with 6 100m pipes laid in trenches 50m long 1.2m wide with the pipe down one side up the other and the trenches 1.2m(ish) apart, works out about 15m x 50m, 750sqm. I have it laid in the field beside house so nice rectangle shape, but I know folk that have trenched it all within their site by going around the house basically. All needs to be calculated out for each property, can't see it being very efficient in a house with little insulation tho, pump would be running 24/7 to retain heat levels
Not as much land as you might think at first. However, the ground loop will be sized to suit the pump, which in turn will be sized for your needs.
Unless you can find one of the new type GSHP, that produce appreciably hotter water than that traditionally produced in a heat pump. Not sure if they are even in the market though...??
If using a low temp heat pump, you will need oversize rads. Again, they will be sized to suit.
However, insulation is the key to a successful install....
Unless you can find one of the new type GSHP, that produce appreciably hotter water than that traditionally produced in a heat pump. Not sure if they are even in the market though...??
If using a low temp heat pump, you will need oversize rads. Again, they will be sized to suit.
However, insulation is the key to a successful install....
Timbo
Member
- Location
- Gods County
It wont be cost effective. Stay with oil or gas, and spend the money on insulation / double glazing whatever you can improve FIRST
renewablejohn
Member
- Location
- lancs
Our house is very old (approx 1650) and listed but that has not stopped use becoming VERY insulated all with Listed Building Consent. We looked at GSH but PVT with heat pump was a more viable cheaper option as our Listed Building Consent also allowed us to switch from traditional radiators to UFH.
- Location
- Boroughbridge, york
Some Heat pumps can have a hot gas take off to produce proper hot water but the efficiency isnt good.
Probably still more than an emersion water heater though.
My pump has the hot gas option but its not used those pipes are blanked off.
4 acres of land for a 260kw pump which would be huge for domestic
Efficiency ranges from 3 to 4:1
Down to three when working hard in cold weather for a period of weeks
Average efficiency after 12mths 3.6.
I cant see myself installing gshp in farmhouse without major works first insulating floors adding underfloor pipes etc,
Doing the above would cut the lpg bill vastly . Id probably stop on lpg
One difference is I buy at commercial lpg rates so get an excellent price, no where near the standard domestic price.
Probably still more than an emersion water heater though.
My pump has the hot gas option but its not used those pipes are blanked off.
4 acres of land for a 260kw pump which would be huge for domestic
Efficiency ranges from 3 to 4:1
Down to three when working hard in cold weather for a period of weeks
Average efficiency after 12mths 3.6.
I cant see myself installing gshp in farmhouse without major works first insulating floors adding underfloor pipes etc,
Doing the above would cut the lpg bill vastly . Id probably stop on lpg
One difference is I buy at commercial lpg rates so get an excellent price, no where near the standard domestic price.
Exfarmer
Member
- Location
- Bury St Edmunds
Only 3.6 return, are you happy with that? It would mean the cost is roughly twice what I pay for mains gas/electric
- Location
- Boroughbridge, york
Its slightly cheaper than commercial lpg heating, the rhi does the rest.
Solar panels cut the leccy bills also.
Solar panels cut the leccy bills also.
Exfarmer
Member
- Location
- Bury St Edmunds
I hoonnestlly expected you would g3et a better return from GSHP. Certainly my Air pump in the Summer gives very good returns although even this is probably no cheaper than I would pay for mains gas.
- Location
- Boroughbridge, york
Efficiency dips when the pumps work 24/7 when chicks are due/small.
- Location
- North Staffordshire
24/7 Farming is about right although the ground loop design and sizing is critical to the work the heat pump unit will do. If your house is very old and you are limited on what you can do about insulation then is a heat pump the right technology for your property? Most modern heat pumps can supply a (heating) water flow temp of 65 - 70C but they work damn hard and use a lot of electricity to do that, meaning high electricity bills for you. Renewable energy is all about the right technology for the right building and a heat pump for an old draft and leaky house may not be the best solution. Have you considered a biomass (pellet or chip) boiler? These would happily churn out 75-80C all day long.
We design and install heat pumps and biomass boilers so happy to talk some more if you wish to for further advice.
[email protected]
We design and install heat pumps and biomass boilers so happy to talk some more if you wish to for further advice.
[email protected]
renewablejohn
Member
- Location
- lancs
If you have a stream nearby it could be a more reliable heat source than a ground loop.
- Location
- North West Wales
What’s the legalities or hoops to jump through if going down that route, we have a spring feeding a mill pond above the house which then runs through a clay pipe to where the water wheel used to be, it’s now piped through the garden using 9” twin wall and is usually running 1/3+ full all year. It’s really something we could look into in years to come as piping it into and out of the heat pump room would be a doddle. Something reminds me that the EA or NRW state that you can only harvest 4 degrees?
4course
Member
- Location
- north yorks
Just wondering the world has gone down the route of reducing co2 emmissions etc , fine ,but what is the ultimate effect of reducing the earths inner core temperature, is it earth cooling and or mass loss thus eventually drifting of into the universe or is it as the buzz word sustainable with ground source heat extraction
- Location
- Boroughbridge, york
Gripple in Sheffield have a heat pump,which draws its water from the river Don and returns it,all using the extraction licence and pipe work dating back to when cooling water was used by the factory. They do have to monitor river temps to prove they are not over cooling the water.
You would probably need an abstraction license to use the water flowing under your lawn, even though you are returning it all immediately.
Gripple run the water through a heat exchanger no bigger than a car radiator and have some large heat pumps
You would probably need an abstraction license to use the water flowing under your lawn, even though you are returning it all immediately.
Gripple run the water through a heat exchanger no bigger than a car radiator and have some large heat pumps
Speedstar
Member
- Location
- Scottish Borders
That would be a big no ,no in scotland, not aloud to put pipes in any kind of water course ,
Or a nice pond...
We did look into this here, but the installers were dubious (for which read, had no experience) of such setups... As it is fed by running drains most of the year, I suspect it would have worked too.
renewablejohn
Member
- Location
- lancs
Have a look on the Navitron site there is an excellent case study on there by one of the forum members. As for officialdom in these sort of cases I am a great believer in stealth. Especially if mill ponds etc already exist. Who is going to notice a copper coil in a mill pond.
renewablejohn
Member
- Location
- lancs
Plenty of off gridders do it. Stealth is your friend.
Speedstar
Member
- Location
- Scottish Borders
If you like jail if it ever leaks