The external battery of this heat pump is installed in a greenhouse: https://www.econologie.com/forums/clim-rever ... 12393.html
The results are quite impressive for a measure (the stabilized exceeds 5 COP), for the rest it fits with the manufacturer data !! So all good!
datasheet:
Measurement conditions
Outdoor T ° (in the greenhouse): 36 ° C / 48% RH
° Indoor: 25.2 ° C
temperature set aircon: 32 ° C (max to avoid regulations)
blowing area of the air conditioning: 0.0536 m²
Prince measures
Principle: it is estimated the power of the air blown by the air conditioning by measuring flow and temperatures.
Measurements made with this anemometer which gives the velocity and T ° instantaneous airflow.
Protocol: I 4 measurement points along the fan, as perpendicular as possible to the flow, I note and T ° km / h at each point.
T ° should therefore stabilize I measure 1 minute after moving the anemometer.
We take the averages of these 4 points and we obtain a measurement of volume flow and "hot" T °.
I corrects the flow rate with the density of air (which varies greatly between 25 and 40 ° C) to obtain the mass air flow.
With indoor T °, it is a heat balance and we get the power restored heater.
I measure the electrical power consumed by a power meter on outlet
COP is obtained by dividing the 2!
Measures (performed at 10 minute intervals beginning at T = 10 min and in chronological order)
1 measure:
Pu = 1032W
T ° = inner 25.2 ° C
T ° = Hot 33.38 ° C
4.72 blower speed = m / s
Volume flow = 0.2527 m3 / s
Density at 32.5 1.155 ° C = kg / m3
( according to http://fr.wikipedia.org/wiki/Masse_volumique_de_l%27air )
Mass flow = 0.2919 kg / s
Pc 1004 air = J / kg. ° C
Power output W = 2396
COP = 2.32
2 measure:
Pu = 950W
T ° = inner 25.2 ° C
T ° = Hot 36 ° C
4.35 blower speed = m / s
Volume flow = 0.2330 m3 / s
Density at 35 1.146 ° C = kg / m3
Mass flow = 0.2670 kg / s
Pc 1004 air = J / kg. ° C
Power output W = 2889
COP = 3.04
3 measure:
Pu = 650W
T ° = inner 25.2 ° C
T ° = Hot 39.4 ° C
4.19 blower speed = m / s
Volume flow = 0.2245 m3 / s
Density at 40 1.127 ° C = kg / m3
Mass flow = 0.2530 kg / s
Pc 1004 air = J / kg. ° C
Power output W = 3593
COP = 5.53
In short it is good: the best COP is obtained in the most steady (after 30 minutes of operation). I would do one measure after 1 hours of operation and in slightly different conditions.
I think that the presence of the external battery in a greenhouse at 36 ° C is not unrelated to this "boost" of the COP !!
