Performance Analysis of a Combined Solar-Assisted Heat Pump Heating System in Xi’an, China

Performance Analysis of a Combined Solar-Assisted Heat Pump Heating System in Xi’an, China

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This study proposed a combined solar-assisted heat pump (SAHP) system that could operate in the serial mode or parallel mode.For this proposed system, a stable year-round operation could be achieved without the assistance of electric heating or low-temperature heat pump.By analyzing the heat balance equations, a correlation of the combined SAHP system for the two modes switched was obtained, which provided a theoretical basis for the optimal operation RAW ORG PROTEIN VANILLA of this system.In addition, the performance of the proposed system applied in a university bathroom in Xi’an district was investigated using TRNSYS.The results illustrated that compared to the serial and parallel systems, the proposed system exhibited a good performance on energy efficiency.

The annual average coefficient of performance (COP) of the proposed system was 5.7, obviously higher than those of the serial system and the nipple-suckers parallel system, which were 3.3 and 4.3, respectively.Therefore, the results in this study could provide the theoretical guidance and reference for practical engineering design.