Effects of Ambient Parameters on the Performance of a Direct-Expansion Solar-Assisted Heat Pump with Bare Plate Evaporators for Space Heating

<div>Photo of the surface of the collectors after 120 min of operating (a) RH = 50%; (b) RH = 70%; (c) RH = 90%; (d) details of the frost when RH = 90%.</div>

International Journal of Photoenergy

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Figure 8

Figure 8: Effects of Ambient Parameters on the Performance of a Direct-Expansion Solar-Assisted Heat Pump with Bare Plate Evaporators for Space Heating 

Figure 8 | Effects of Ambient Parameters on the Performance of a Direct-Expansion Solar-Assisted Heat Pump with Bare Plate Evaporators for Space Heating 