if any of you have a district heating system and you have multiple heat meters located all over the place, apply to have it changed to a heat loss calc instead, you will be financially better off most likely, do the maths first tho, the approved under ground pipe has a specified heat loss of so many watts per meter, this loss is taken off your payment reading. and you are usually better off doing it this way, you have to condemn one of the meters as being faulty.
RHI calcs
- Thread starter f0ster
- Start date
turbofarming
Member
We heat 4 properties and 2 workshops all on separate meters. Over 47 months we have lost an average of 16.6% compared to the main meter on the boiler, sittting around 6.5-10% in the winter and much higher in summer. How would I go about doing this and does it sound like it could be beneficial?
you need to find out the type/size of underground pipe and how many meters there are. the details should already be on the original rhi application, from manufacturers data it will tell you the heat loss per meter, we have installed a lot of biomass and the heat meters are not usually reading correct, quite often due to the way the sensors are located in to the pipe and the location.even the orientation of the flow sensor makes a difference. we have converted a lot of our installs to heat loss calc and it had always been financially better for the customer but do the maths first.
Doing it for the kids
Member
Don't most new application do this anyway now? Installing one at the mo with meters on each boiler going into the tank. My first system in august 2013 didn't and we swopped it later, works better,
What sort of efficiency would you expect in the secondary side then!? I'm getting 85 % on one system with no insulated above ground pipe work.
I insulated the other and it jumped from 50 to 80-90% over night!
What sort of efficiency would you expect in the secondary side then!? I'm getting 85 % on one system with no insulated above ground pipe work.
I insulated the other and it jumped from 50 to 80-90% over night!
- Location
- Warwickshire
We have 7 sub meters & one boiler meter, our system was commissioned March 2013.
I agree there is a fair difference between the boiler meter & the total of the sub-meters (10-20% loss) but at the time of installation, you didn't get paid on your boiler if it was in an open shed - ie no door on it. There is some heat loss from the tank & pipes as well as the boiler.
In the grand scheme of things I'm not worried about it. I don't expect to get paid for heating a pole barn with clad sides just by putting a door on it.
We could put a door on it but that would mean making a vent for the fan and it would create a warm shed eg for a tractor - but is that really what the scheme was created for ?
Our boiler is on the higher tariff so extra kW would probably take us into the lower tariff making it less worthwhile.