Green Building Forum |
Home Books GBEzine Subscription News HelpDesk Your Cart Register |
Welcome to the Green Building Forum. Reading any of the public conversations is free but if you want to join in the discussions then you need to register first to obtain a code for which there is a small charge. Please follow the link on the left. OR:
Logout | ||
© Green Building Press |
||
Comments
http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9264
Unfortunately, the link djh gave there is now broken.
Does anyone have a good source of figures for primary energy usage in the domestic UK housing stock to compare against?
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/49402/dukes1_1_6.xls
Natural Gas: 1.1
Wood: 0.2
Electricity (mains): 2.7
(Electricity (PV): 0.7)
So, in your example, it would be:
Mains electricity - 50kWh/m2/year = 50*2.7 = 135kWh/m2.a
Mains gas - 50kWh/m2/year = 50*1.1 = 55kWh/m2.a
Wood pellets - 20kWh/m2/year = 20*0.2 = 4kWh/m2.a
Total 120kWh/m2/year = 194kWh/m2.a
The PE ratio for wood is very low, presumably because they are not taking into account the energy from the sun to make the tree grow in the first place.
The numbers may have changed in the newer version of PHPP but I doubt that they are very different.
Hope this helps.
Mark, your figures look correct to me, thanks for digging them out.
I have been hunting high and low looking for Total Primary Energy figures per property in relation to existing UK housing stock and there seems to be little out there - very surprising - the best I can get to at the mo is a figure of about 450kWh/m2/year for a typical UK home - more hunting required I think :-)
http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=7131&page=1#Item_0
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/48195/3224-great-britains-housing-energy-fact-file-2011.pdf