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Ground source heat pumps

Discuss Ground source heat pumps at UK Plumbers Forums; The main difference with renewables is you really do have to do your maths properly with regards to heat loss as the amount of energy harnessed is often fixed by ...
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    Default Re: Ground source heat pumps

    The main difference with renewables is you really do have to do your maths properly with regards to heat loss as the amount of energy harnessed is often fixed by how much solar radiation a patch of ground can absorb, which direction your roof is facing etc... You have to remember a large part of the domestic heating industry only install combi boilers use a mears calculator to size and rarely use pipe above 22mm, if you use the same logic with renewables you will not get great results.

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    Default Re: Ground source heat pumps

    i suppose gakmonkey's comments should have been followed by the government as most windfarms only seem to profitable due to their funding, most of the turbines i have passed are always at a standstill!!!!!!!!!!

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    Default Re: Ground source heat pumps

    Approximately you need a plot of land 2-2.5x the area of your house. For a 10Kw GSHP you would need 3 trenches 50m long 5m apart and 2.5m from any boundary. Vertical slinkys need to be installed in a 2m deep trench, horizontal slinkys in a 1.2m deep trench. Vertical bore holes are another way, but a lot more expensive. This info is approximate as it does depend on ground conditions. Insulate, insulate, insulate. is the way forward not just for renewables.

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    Default Re: Ground source heat pumps

    Heat pumps can be a nightmare if not setup correctly the ground water has to be
    The right flow and not too cold I've been to some installations and they didn't have
    A constant flow so the unit cut out on evap flow and it can use massive amounts of
    electricity if just put in and switched on .

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    Default Re: Ground source heat pumps

    Quote Originally Posted by stevetheplumber View Post
    personally im of the opinion that if your using renewables because it will ease your green concious fine if your thinking it will save you money think again
    installed pv on roof 6 years ago, paid itself back and this year my energy costs total will be in the region of £750 but the pv will pay me £1500 so it does work,

    Have just had a few quotes for GSHP and will be going ahead, it is a refurb and the insulation will be over and above current recommendations so the GSHP will pay for itself (if works to 75% of expectation) within the 7 years
    Last edited by Spanish; 01-04-2016 at 01:33 PM.
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    Default Re: Ground source heat pumps

    This site is mainly hung on natural gas, oil or lpg. there are not many of us who are fitting renewables which is what most gas engineer fear
    Worcester likes this.

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    Default Re: Ground source heat pumps

    Quote Originally Posted by quality View Post
    This site is mainly hung on natural gas, oil or lpg. there are not many of us who are fitting renewables which is what most gas engineer fear
    Over the years I've seen some renewable installations which worked pretty well and many others which were completely pants. Some retrofit jobs should never have been taken off the drawing board and end up costing a sight more to run and install than equivalent oil/lpg. I've also found not all major contractors/consultants are clued up on them either so going to the big boys doesn't always equate to a good installation!

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