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Author Topic: Fitting heat meter to GSHP  (Read 2045 times)
djs63
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« on: February 24, 2015, 09:22:44 AM »

We have a GSHP ( Greenstore) and I keep coming back to the idea of fitting a heat/flow meter. The DHW and heating circuits have separate output tubes and so it seems obvious that I need 2 meters - or do I? Any advice please.
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6 Kw Proven wind turbine, 15 Navitron evacuated solar hot water tube array and 1.8 Kw PV, grid connected (SMA inverters) and GSHP supplying radiators and UFH. Wood burning stove (Esse 300) and oil fired Rayburn. Rainwater harvesting 4000 litre tank underground. Nissan Leaf
BruceB
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« Reply #1 on: February 24, 2015, 09:35:47 AM »

If you mean that the 2 circuits have separate outputs from the heat pump, then yes you are likely to need 2 meters.  If the circuits split after the output from the heat pump, then a single meter before the split should do it

If you have 2 outputs from the heat pump but only one is in operation at a time then in principle you could have sensors on each pipe and then have them switched by a relay into the circuit when appropriate.  The meters I have seen that are MID certified for RHI could not do that and retain certification because I believe the sensors are matched to each other and the meter.
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djs63
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« Reply #2 on: February 24, 2015, 04:01:51 PM »

 Thanks Bruceb, it's as I thought except I didn't know certification, matching issues.
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6 Kw Proven wind turbine, 15 Navitron evacuated solar hot water tube array and 1.8 Kw PV, grid connected (SMA inverters) and GSHP supplying radiators and UFH. Wood burning stove (Esse 300) and oil fired Rayburn. Rainwater harvesting 4000 litre tank underground. Nissan Leaf
baker
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« Reply #3 on: February 24, 2015, 06:42:06 PM »

 no you don't need two meters , just two pulse sensors
 have a look at ,bell flow systems
 can connect extra pulse inputs for additional systems
 no connection with this company , 
 
 baker
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djs63
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« Reply #4 on: February 25, 2015, 04:07:25 PM »

Thanks Baker. I went to Bell Flow Systems and searched for "pulse sensors" but no joy. What am I doing wrong please? Thank you again. David
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6 Kw Proven wind turbine, 15 Navitron evacuated solar hot water tube array and 1.8 Kw PV, grid connected (SMA inverters) and GSHP supplying radiators and UFH. Wood burning stove (Esse 300) and oil fired Rayburn. Rainwater harvesting 4000 litre tank underground. Nissan Leaf
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