Air Source Heat Pumps

albyota

Sorry, we are a bit out of phase with the posts....lets leave this for your solicitor and Danfoss to sort out... wish you luck with it... you should see better savings for the hot water side of things in the summer,

maybe the zoning of the system needs to be looked at if you are running Rads (50C) as well as UFH ( 35/40?) is there a buffer tank?

nethertonhall

Hermann - yes thats our old web site - check out nethertonhall.co.uk

Albyota - yes I appreciate this and will do so, It may be worth others watching the outcome!!

We are running 2 floors of UFH and 1 floor of rads - sized for GSHP I could get them to look at zoning and a buffer tank - I will ask the question.

Thanks for your help

Hermann

Wow looks like a fantastic place!

Congratulations on on all the green aspects and also the use of local labour!

Although I understand your issues about the original claims it certainly sounds as if the heat pumps work well for you, which is encouraging to hear.

Looks like you could site a wind turbine somewhere in the garden. Generate your own electric to run those heat pumps (maybe a bit of PV too!) Then it really would be an incredible setup!

nethertonhall

Hermann - it is and will be great when the cottages and pool are finished - Thanks.

We have planning permission for PV cells on th pool hall and have quotes for the wind turbine - they will have to wait until we get the other finished.

Yes the heat pumps work well - that I admit, hence buying more - my issue is the claim Danfoss made that canot be shown to me!

Hermann

Also spotted a reference to a brook on site.

Any possibility of some Hydro? Simple reliable technology that can produce the most consistent supply of self generation! Total c@ck up on the FIT/Hydro front though seems there's nothing MCS accredited (including installers)!!

Can't think of a better solution ... self generating the leccy and running heat pumps!

albyota

Hermann wrote: »

Also spotted a reference to a brook on site.

Any possibility of some Hydro? Simple reliable technology that can produce the most consistent supply of self generation! Total c@ck up on the FIT/Hydro front though seems there's nothing MCS accredited (including installers)!!

Can't think of a better solution ... self generating the leccy and running heat pumps!

Non visible Solar PV (FIT 30-40p/kWh) on the proposed swimming pool roof would give a far greater return / quicker payback rather than wind / hydro etc...as planning permission/restrictions in a beautiful setting like this would be an issue. The manufacturers are looking at providing 'ASHP/GSHP Solar packages'. the banks/gvmt' hopefully should support this with 'renewable/green loans'.

albyota

nethertonhall wrote: »

Hermann - it is and will be great when the cottages and pool are finished - Thanks.

We have planning permission for PV cells on th pool hall and have quotes for the wind turbine - they will have to wait until we get the other finished.

Yes the heat pumps work well - that I admit, hence buying more - my issue is the claim Danfoss made that canot be shown to me!

I think, for Danfoss to have documented in a contract that you would get a COP of 4 for 25 years rather than 'up to', is a case for your solicitor. I have heard of ground conditions not performing very well after a couple of years, especially if there has been little rain /no sun/ previous year / water table? unstable ground conditions, boreholes and slinky's, however there are so many variables as to 'why' that cannot be discussed on a forum like this, as others have said, a COP of anything more than 2.5 is very good. Quoted Annual/seasonal average COP's of between 3.0 and 3.6 from ASHP manufacturers is as close as you can get to actually be confident, however, again, this will all depend on heat load, heat loss, U values, hot water use, how the system to which it is connected to, UFH, larger correctly sized radiators, fan coils etc... has been designed and is operated.

nethertonhall

Thanks guys, I looked into Hydro - the stream flows all year but does not have the volume in the summer - the winter would be fine.

Lets look at other options forthe pool - I was going down the Heatstar gemini.

eugeneg

How can output be measured please ? I can get the input to my NIBE Fighter 2005 ASHP, but to see what COP I am getting I need to know the output too.

http://www.nibe.co.uk/NIBE-Heat-Pump.../FIGHTER-2005/
http://www.nibe.co.uk/NIBE-Heat-Pump...Pumps/VVM-300/

nethertonhall

Hi Eugeneg - Danfoss installed output meters on both my units - they give figures in KW, sorry cant tell you how.