In severe cold regions, the winter heating load is significantly greater than the summer cooling load. The long-term operation of a standalone ground source heat pump （GSHP） system leads to a gradual decline in system performance. To address this problem, a photovoltaic/thermal-ground source heat pump （PV/T-GSHP） simulation model is established using the TRNSYS software. The PV/T installation area is determined according to different power generation requirements, and the effects of different PV/T supply and return water temperature difference control strategies on system heating and cooling performance are investigated. The annual thermal performance of the PV/T-GSHP system is comprehensively analyzed. The results show that when the power generation satisfies the energy demands for daily lighting, heat pump operation, and water pump operation, the coefficient of performance （COP） of the heat pump unit is 4.21 in the heating season and 6.33 in the cooling season. After 10 a of continuous operation, the soil temperature decreases by 1.95 ℃ compared with the initial state. When the temperature difference between the PV/T outlet and the preheating water tank decreases from 8 ℃ to 6 ℃, the system energy consumption increases by 2.24%, the power generation increases by 1.63%, and the unmet domestic hot water demand decreases by 16%. It is concluded that reasonable determination of the PV/T installation area and optimal setting of the PV/T temperature difference control strategy can effectively improve the long-term operational performance of the PV/T-GSHP system.
Key words
PV/T /
solar energy /
soil thermal balance /
control strategy /
energy consumption analysis
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References
[1] 中国建筑节能协会建筑能耗与碳排放数据专委会. 中国城乡建设领域碳排放研究报告(2025)[R]. 北京, 2025.
Specialized Committee on Building Energy Consumption and Carbon Emission Data, China Association of Building Energy Efficiency. Research Report on Carbon Emissions in China's Urban and Rural Construction Sector(2025)[R]. Beijing, 2025.
[2] Fu H D, Zhao X X, Ma L, et al.A comparative study on three types of solar utilization technologies for buildings: photovoltaic, solar thermal and hybrid photovoltaic/thermal systems[J]. Energy Conversion and Management, 2017, 140: 1-13.
[3] Girard A, Gago E J, Muneer T, et al.Higher ground source heat pump COP in a residential building through the use of solar thermal collectors[J]. Renewable Energy, 2015, 80: 26-39.
[4] Zhu N, Wang J M, Liu L.Performance evaluation before and after solar seasonal storage coupled with ground source heat pump[J]. Energy Conversion and Management, 2015, 103: 924-933.
[5] 穆志君, 关欣, 刘鹏. 太阳能光伏光热一体化系统运行实验研究[J]. 节能技术, 2009, 27(5): 445-447, 465.
Mu Z J, Guan X, Liu P.Experimental study of hybrid photovoltaic-thermal solar system[J]. Energy Conservation Technology, 2009, 27(5): 445-447, 465.
[6] 刘仙萍, 田东, 雷豫豪, 等. 光伏/光热-地源热泵联合供热系统运行性能研究[J]. 太阳能学报, 2022, 43(9): 88-97.
Liu X P, Tian D, Lei Y H, et al.Performance analysis for solar photovoltaic/thermal-ground source heat pump hybrid heating system[J]. Acta Energiae Solaris Sinica, 2022, 43(9): 88-97.
[7] 周东东, 刘寅, 董岁具, 等. PV/T耦合热泵系统运行特性分析[J]. 太阳能, 2024(12): 40-48.
Zhou D D, Liu Y, Dong S J, et al.Operation characteristics analysis of PV/T coupled heat pump system[J]. Solar Energy, 2024(12): 40-48.
[8] 李建伟, 鲍玲玲, 苗壮, 等. PV/T耦合中深层地源热泵供暖系统运行特性研究[J]. 太阳能学报, 2024, 45(9): 219-227.
Li J W, Bao L L, Miao Z, et al.Study on operation characteristics of PV/T coupled middle-deep ground source heat pump heating system[J]. Acta Energiae Solaris Sinica, 2024, 45(9): 219-227.
[9] GB 50736—2012 民用建筑供暖通风与空气调节设计规范[S].
GB 50736—2012 Design code for heating ventilation and air conditioning of civil buildings[S].
[10] JGJ/T 67—2019 办公建筑设计标准[S].
JGJ/T 67—2019 Standard for design of office building[S].
[11] GB 50555—2010 民用建筑节水设计标准[S].
GB 50555—2010 Standard for water saving design in civil building[S].
[12] GB 50034—2004 建筑照明设计标准[S].
GB 50034—2004 Standard for lighting design of buildings[S].
[13] GB 50364—2018 民用建筑太阳能热水系统应用技术标准[S].
GB 50364—2018 Technical standard for solar water heating system of civil buildings[S].
[14] Calise F, Dentice d’Accadia M, Figaj R D, et al. A novel solar-assisted heat pump driven by photovoltaic/thermal collectors: dynamic simulation and thermoeconomic optimization[J]. Energy, 2016, 95: 346-366.
[15] Bisengimana E, Zhou J Z, Binama M, et al.Numerical investigation of PVT coverage on an integrated building-solar-heat pump system: technical and economic study[J]. Solar Energy, 2023, 249: 507-520.
[16] Huang B J, Lin T H, Hung W C, et al.Performance evaluation of solar photovoltaic/thermal systems[J]. Solar Energy, 2001, 70(5): 443-448.
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