Mon, 25 May 2026 22:11:00 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237627#Comment_237627 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237627#Comment_237627 Sun, 13 Mar 2016 07:42:44 +0000 cjard
Buuut, as best I can determine (one reference in a sales brochure) the coil is 24kw on the 300l. The solar option has an additional 1sqm coil and, as far as I can find, you multiply the area by 33.333 and you get your kW, which means the solar coil is actually a greater transfer capacity than the primary coil..

So, i'm confused.. A dedicated heat pump cylinder (there seems no dedicated "low grade heat" version of a Tribune - the sales brochure mentions renewables as biomass, micro-chp, solar thermal, wbs) from a rival co will have a 3 to 3.3 sqm coil, knocking on for 110kw. Apparently, a large coil is used for a better reheat time with low grade heat but surely if the coil transfer ability is greater than the heat source supply kw, then it functions adequately?

Why does a 15kw heat pump input to a 110kw coil, and a 28kw boiler input to a 18-24 kw coil? doesn't make sense to me...

Is there some function of the maths i'm missing, like the delta T making a difference?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237634#Comment_237634 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237634#Comment_237634 Sun, 13 Mar 2016 09:46:53 +0000 Ed Davies
What would be nice to know is the temperature difference at which the coils' powers are rated.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237714#Comment_237714 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237714#Comment_237714 Tue, 15 Mar 2016 06:07:53 +0000 cjard
http://sourceenergy.co.uk/wp-content/uploads/2014/05/Cyclone+HW+cylinder+for+MasterTherm+heatpump.pdf


Dedicated heat pump cylinder with a 24kw primary coil?!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237715#Comment_237715 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237715#Comment_237715 Tue, 15 Mar 2016 06:31:22 +0000 cjard
Heat pump coil looks like it might take up most of the cylinder. I'll ring Range and ask them]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237886#Comment_237886 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237886#Comment_237886 Sat, 19 Mar 2016 22:53:08 +0000 ringi https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237887#Comment_237887 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237887#Comment_237887 Sat, 19 Mar 2016 23:09:47 +0000 ringi
(If I was brave I would design a system that used a large PHE with a diverter value, so most of the time it heated the cylinders from the bottom (side to side) to get the best condensing, but would switch to “top to bottom” heating if there was no hot water left at the top of the cylinder.)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237984#Comment_237984 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14116&Focus=237984#Comment_237984 Tue, 22 Mar 2016 13:21:33 +0000 cjard