To ensure optimal conditions for the activity of used enzymatic
The performances of the IX-SAMHP system operating in the solar water heating mode and solar space heating mode were experimentally investigated in enthalpy difference lab with WAY 316606 solar simulator. Furthermore, in the second-law analysis of the IX-SAMHP system, the exergy efficiency of the system was calculated based on experimental data.(1)In the solar water heating mode, when the system worked with the first operation strategy, the performances under different initial water tank temperatures were compared. The condensing heat exchange rate increased with the evaporating heat exchange rate, and the overall heat transfer performance was synthetic effected by the evaporating temperature and condensing temperature. In the second operation strategy, heat pump operated with flat-plate collector simultaneously. Compared with the situation without irradiation, when the irradiation was 500 W/m2, the evaporating heat exchange rate and condensing heat exchange rate increased by 37.4% and 32.3% respectively.(2)In the first operation strategy of the solar space heating mode, higher initial solar water tank temperature could improve the evaporating heat exchange rate significantly, when the solar water tank temperature was 30 °C the average evaporating heat exchange rate was 2.5 times higher than that when the solar water tank temperature was 20 °C. At the condensing side, due to the limitation of the condensing area, the average condensing heat exchange rate increased by 3.6%. In the second strategy, when irradiation increased from 0 W/m2 500 W/m2, both the heat transfer rate and energy consumption increased, and COP increased by 5.2%.(3)The exergy efficiencies of the IX-SAMHP system working in the solar water heating mode and the solar space heating mode were analyzed. In both working modes, when the irradiation was 500 W/m2, the heat transfer performance at evaporating side and condensing side were enhanced, which was beneficial to the improve of ηex. In the solar water heating mode, as the domestic water tank temperature raised, so as ηex. In the solar space heating mode, since the evaporator absorbed heat from the solar water tank, TL dropped while TH remained the same, and ηex increased.