Discuss Thermo dynamics for hot water that runs off atmosphere in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
odd, I thought it was less than that from the report I was looking at the other day, but I was trying to read it off a graph. So 2.3 million homes heated by electricity...
did the consultants actually take measurements themselves for this report, or attempt to calculate the COP?
indeed. I'm wondering if our finances will stretch to buying a unit we can set up to test through this winter.
SolarKing are now advertising and marketing this system. They are advertising for sales staff to sell it via leads generated by door knockers and cold calling...
Thermodynamic water heater system,*Heat pump mechanism - AIR MACHT
Looks like thermodynamics without the panel (s). Worth having a look at their online calculator which when I did it for my own house claimed I'd get my money back in 3.9 years....
Do you mind me asking what methodology they used?Yes they did a full evaluation which did cost a lot of money but nothing even close to trying to defend a case in court from a consumer looking for their money back plus compensation.
Very few if any will save money using the system because there are more issues at large than the warped performance figures.
That said the theory is good and there is a better chance of a return from the larger commercial system however it must be used bivalent instead of the stand alone recommended by the manufacturer.
@SteveK - do you (or he) consider that good or bad?
Do you mind me asking what methodology they used?
Did they test it with varying wind and solar input levels, or just in static air at different air temperatures?
If the latter then I'm not surprised it didn't come out too well.
I get that as being a COP of 4.3ish, depending on what the grid voltage was (figure given is for 240V / 864W / 1.3kWh electrical input, 5.58kWh heat required to heat 200l of water by 24 deg), and if that was the ampage for the entire time.Today's observations on a 200l cylinder:
Ambient - 2.5 deg C
Compressor draw - 3.6 amp
Water entering - 8 deg C
Raise - 24 deg C (to 32)
Time - 90 mins
I did check today if the immersion was on during initial warm up. It wasn't.
Interesting. Can you explain further why mixing all the the forms of heating into one store.
How will you combine the thermodynmaics system into the thermal store?
Where abouts are you in East Midlands. Sorry about or the questions just interested
400 litre thermal store is way too small. This will be little more than buffer tank. This needs to be correctly sized for the job in hand and the range of heat inputs. Immerses need to be correctly located so it can be used for hot water only in the summer. You will probably find you need a tank of at least 2000 litres. Are you planning to use an internal heat exchanger or an external plate heat exchanger for hot water?
with regard to thermodynamics, read all the threads on this site before making a decision. They are currently excluded from MCS and RHI. You could be far better off with traditional solar thermal.
i thought thermodynamics had to be on its own cylinder as it works with F gas
400 litre thermal store is way too small. This will be little more than buffer tank. This needs to be correctly sized for the job in hand and the range of heat inputs. Immerses need to be correctly located so it can be used for hot water only in the summer. You will probably find you need a tank of at least 2000 litres. Are you planning to use an internal heat exchanger or an external plate heat exchanger for hot water?
with regard to thermodynamics, read all the threads on this site before making a decision. They are currently excluded from MCS and RHI. You could be far better off with traditional solar thermal.
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