Performance optimization of photovoltaic/thermal systems coupled with air source heat pumps

doi:10.3969/j.issn.2097-0706.2024.04.005

Abstract

Abstract:

To explore the performance of photovoltaic/thermal（PV/T） systems coupled with air source heat pumps in certain regions， the daily electricity generation， daily power consumption， heating effect and total investment of a coupling system during heating season were analysed by experiments and numerical model analyses. Firstly， the simulation model was established by Trnsys， and the simulation results were compared with the experimental results. Secondly， the angle of PV/T modules， the area of PV/T modules， the heating capacity of the air source heat pump，hot water tank temperature， and the capacity of batteries were optimized by non-dominated sorting genetic algorithm（NSGA-II）.Taking the highest electricity generation of the PV system， the lowest power consumption of the heating system and the minimal initial investment of the coupling system as objectives， the performance of the coupling system was improved by the multi-objective optimization carried out in JEplus software. Finally， the configuration scheme after the optimization shows a 117.40% increase in the electricity generation of the PV system and a 38.76% decrease in the power consumption of the coupling system， with only additional 9 700 yuan in its initial investment.

Key words: photovoltaic/ thermal, air source heat pump, multi-objective optimization, heating, Trnsys software

CLC Number:

TK019

TANG Zihan, WANG Shuaijie, JU Zhenhe, LEI Zhiqi. Performance optimization of photovoltaic/thermal systems coupled with air source heat pumps[J]. Integrated Intelligent Energy, 2024, 46(4): 34-41.

Figures/Tables 10

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参数	数值
外墙厚度/m	0.34
外墙面积/m²	77.95
外墙总传热系数/[W·(m²·K)^-1]	0.5
外表面吸收率	0.8
外窗面积/m²	5.04
外窗总传热系数/[W·(m²·K)^-1]	2.17
人均散热量/(kJ·m^-2)	162
空气相对湿度/%	5
单位照明散热量/(kJ·m^-2)	9
单位用电器散热量/(kJ·m^-2)	8
换气频率/(次·h^-1)	0.5

参数	数值
额定功率/kW	2.4
额定制热量/kW	8.4
性能系数	3.50
工作范围/℃	-25~45

优化变量	范围
光伏组件倾角/(°)	20~60
光伏/光热组件面积/m²	4.6~17.8
空气源热泵制热量/kW	2.5~18.0
承压储热水箱容积/m³	0.46~1.78
蓄电池组容量/(kW·h)	5.20~38.9

优化变量	优化前数值	优化后数值
光伏组件倾角/(°)	51	36
光伏/光热组件面积/m²	7.78	17.70
光伏组件面积/m²	10.40	21.84
空气源热泵制热量/kW	6.3	5.0
承压储热水箱容积/m³	0.78	1.50
蓄电池组容量/(kW·h)	7.8	5.2