Research on solar assisted air source heat pump heating systems

doi:10.3969/j.issn.2097-0706.2023.12.002

Abstract

Abstract:

To achieve the dual carbon target， China has carried out a series of policies，such as "coal to electricity". To control the excessive heating cost resulting from taking air source heat pumps alone for heating in northern China， PV power generation systems are coupled with heat pumps to assist their heating capacity. The simulation model of a solar assisted heat pump （SAHP）heating system is constructed by Matlab and TRNSYS platform in a laboratory of a Shenyang college. With a designed system operation strategy and maximum power point tracking （MPPT） control algorithm， the PV system output under various irradiation， DC bus voltage， voltage and current varying with the charging and discharging of batteries and other parameters of an SAHP heating system are studied. The influences of the indoor and outdoor temperatures， heat pump power consumption on economic and environmental benefits in heating seasons of the system are analyzed. The results show that the total heating capacity of the SAHP system in one heating season is 4 627.66 kW·h，which meets the heating requirement of keeping the indoor temperature above 19.12 ℃. Furthermore， the cost of the SAHP system per heating season is only 56.68% of that of a pure heat pump system. In terms of the environmental benefits， the SAHP system can reduce the CO₂ emission by 974.24 kg and SO₂ emission by 7.89 kg per year， compared with the traditional boiler.

Key words: "dual carbon" target, coal to electricity, PV power generation, air source heat pump, MPPT, irradiation, clean heating

CLC Number:

TK01

ZHANG Siliang, QI Lintong, QU Haowei, ZANG Dehua, ZHOU Wenhan, WANG Lidi. Research on solar assisted air source heat pump heating systems[J]. Integrated Intelligent Energy, 2023, 45(12): 10-19.

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设备名称	参数	设计值
光伏组件	装机容量/ kW	2.345
光伏组件	倾角/(°)	51
蓄电池	容量/(kW·h)	10
空气源热泵	额定功率/kW	0.907
空气源热泵	额定制热量/kW	3.56
蓄热水箱	体积/m³	0.15
循环水泵	流量/(m³·h^-1)	1.948 8
循环水泵	功率/kW	0.067

参数	数值
最大功率点处功率/W	335
最大功率点处电压/V	38.00
最大功率点处电流/A	8.82
开路电压/V	46.10
短路电流/A	9.30

设备名称	规格/数量	价格/元
光伏板	7×335 W	6 000
蓄电池	10 kW·h	4 000
空气源热泵	735 W	2 100
蓄热水箱	150 L	600
循环水泵	67 W	90
暖气片	1组	250
控制器	1台	1 000
管路阀门及温度传感器等		500
共计		14 540

运行方式	消耗电能/（kW·h）	年运行费用/元
光伏-热泵系统	935.18	467.59
单一热泵系统	1 980.25	990.13

运行方式	初投资	年运行费用	费用年值
光伏-热泵系统	14 540	467.59	976.95
单一热泵系统	4 540	990.13	1 723.62