Testing and calculation of actual COP with air conditioning Airton


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Tests and performance tests on an air conditioning

Reversible heat pumps Inverter are "in fashion", many are installed either for the air conditioner mode or for heating mode, or 2.

What are the real price of a 1er heat pump performance (euros 549 + connection kit)?

Inverter air conditioner Airton

We tried to find out by estimating the instantaneous COP Airton an Inverter model.

Inverter air conditioner Airton

The external battery that air conditioning is located in a greenhouse facing EAST. Debate on interest placement of the outdoor unit of an air in a greenhouse.

Mesures

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 rate and temperature.

Measurements made with this anemometer which provides the speed and the instant T ° air flow.

handheld anemometer

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.

The averages of these 4 points are obtained and a measurement of volume flow and T ° "hot" is obtained.

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
(Based 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

Conclusion

The last COP measured far beyond the expected 4, the interest to place the outdoor unit in a warm room is confirmed. More analysis in the link below.

More: debate on the actual COP of an air conditioning Airton


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