Performances of PV/T solar-assisted heat pump system

doi:10.11949/j.issn.0438-1157.20161398

Abstract

Abstract:

Solar photovoltaic/thermal integrated heat pump(PV/T-HP) is expected to realize comprehensive utilization of photovoltaics and thermal.To analyze the performance of PV/T-HP,mathematical models of PV/T evaporator,compressor,water tank and thermal expansion valve are established respectively and linked to form a complete thermodynamic cycle based on energy conservation,mass conservation equation.Simulation is carried out through MATLAB.The model accuracy is validated through direct expansion solar assisted heat pump(DX-SHAP) experiments.The result shows that the simulation error is about 5%,which is acceptable.Comparing the performance of PV/T-HP and DX-SHAP,with the rise in solar radiation intensity,COP both increases.With high solar radiation intensity,COP of PV/T-HP can be more than 5.The comprehensive COP of PV/T-HP is 7.4 on average,which is higher than that of DX-SHAP.The result shows that,PV/T-HP is conductive to reduce energy consumption of the system and improve the photoelectric conversion efficiency of photovoltaic modules,so it has more benefit on energy-saving.

Key words: solar energy, renewable energy, solar-assisted heat pump, photovoltaic/thermal, mathematical modeling

摘要：

建立了光电/光热一体化（PV/T）太阳能热泵的数学模型，利用直膨式太阳能热泵实验中获得的数据对模型进行校核，结果显示，模型的计算误差在5%左右。据计算可知，在太阳辐射良好的情况下，PV/T太阳能热泵的COP可达到5以上。在不同的辐射强度下，比较PV/T太阳能热泵与直膨式太阳能热泵的性能，随着太阳辐射强度的提高，系统COP随之提高，热电综合COP平均为7.4，高于直膨式太阳能热泵的COP。结果显示，PV/T太阳能热泵有利于降低系统的能耗，提高光伏组件的光电转化效率，较直膨式太阳能热泵更具节能优势。

关键词: 太阳能, 再生能源, 太阳能热泵, 光伏光热一体化, 数学模拟

CLC Number:

TK519

LI Guanqun, SUN Xiaolin, CHEN Jinfeng, DAI Yanjun. Performances of PV/T solar-assisted heat pump system[J]. CIESC Journal, 2016, 67(S2): 291-297.

李冠群, 孙晓琳, 陈金峰, 代彦军. 基于光电/光热一体化的太阳能热泵性能分析[J]. 化工学报, 2016, 67(S2): 291-297.

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