Page 127 - Defrosting for Air Source Heat Pump

120 Defrosting for Air Source Heat Pump

Table 5.1 Specifications of the outdoor coil in the experimental ASHP unit
Item Parameter Value Unit

1 Height of the outdoor coil 44 mm
2 Width of the outdoor coil 590 mm
3 Length of the outdoor coil 500 mm
4 Fin height 44 mm
5 Fin width 152 mm
6 Fin thickness 0.115 mm
7 Fin pitch 2.1 mm
8 Fin type Plate –
9 Tube external diameter 10 mm
10 Tube thickness 0.5 mm
15 Tube spacing 20 mm
11 Circuit pitch 22 mm
12 Number of tube rows 2 –
13 Number of circuits 3 –
14 Number of water-collecting trays 1 –
15 Number of water-collecting cylinders 1 –
16 Number of wind boards 2 –
17 Material of tube Copper –
19 Material of fin Aluminum –
20 Material of water-collecting tray PVC –
21 Material of water-collecting cylinder PVC –
22 Material of wind board Wood
23 Volume of water-collecting cylinder 2000 mL

600 mm
Outdoor
Air duct air fan
(400×400 mm)

1000 mm Temperature and 440 mm 600 mm
humidity sensor
Grid for measuring
air velocity
600 mm
Air duct Outdoor coil 250 mm
44 mm (1000×600×550 mm) Wet bulb temperature sensor
Dry bulb temperature sensor
Side A Side C

Fig. 5.3 The airside details of the outdoor coil in the experimental ASHP unit.