Experimental Study of a Novel Direct-Expansion Variable Frequency Finned Solar/Air-Assisted Heat Pump Water Heater

<div>Configuration diagram of the DX-SAHPWH system. (a) Schematic. (b) Photo. 1: solar/air source horizontal finned evaporator-collector; 2: automatic lifting glass cover plate; 3: fan; 4: electronic expansion valve; 5: accumulator; 6: condenser; 7: water tank; 8: variable frequency compressor; 9: strainer.</div>

International Journal of Photoenergy

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Figure 1

Figure 1: Experimental Study of a Novel Direct-Expansion Variable Frequency Finned Solar/Air-Assisted Heat Pump Water Heater 