冷却水流量变化对板管式光伏光热系统的性能影响
|
摘要
不同冷却水流量条件下,板管式光伏光热(PV/T)系统的性能会发生显著变化。文章通过实验测试了当冷却水流量发生变化(0～0.25 kg/s)时,板管式PV/T组件的温度、发电功率、冷却水温度,以及板管式PV/T系统热效率的变化情况。分析结果表明:当冷却水流量为0～0.25 kg/s时,PV/T组件发电功率的平均值比PV组件增加了约5%,同时,PV/T系统的热效率可达到约57%;板管式PV/T组件的发电功率随着PV/T组件温度的升高而降低,PV/T系统的热效率随着冷却水温度的升高而升高。
The performance of sheet-tube photovoltaic/thermal(PV/T) system could be significant varied under different cooling water flow rates conditions.In the experiment,the temperature and output power of PV/T module,the temperature of water and the thermal efficiency of PV/T system have been tested,which are affected by the various flow rates(0～0.25 kg/s) of the cooling water.Results showed that the output power average of the PV/T module increased by approximately 5%more than the PV module,and the thermal efficiency of the PV/T system reached to approximately57%,when the flow rate of cooling water varied from 0 kg/s to 0.25 kg/s.In addition,the output power of the PV/T module decreased with the temperature increasing,but the thermal efficiency increased with the water temperature increasing.
The performance of sheet-tube photovoltaic/thermal(PV/T) system could be significant varied under different cooling water flow rates conditions.In the experiment,the temperature and output power of PV/T module,the temperature of water and the thermal efficiency of PV/T system have been tested,which are affected by the various flow rates(0～0.25 kg/s) of the cooling water.Results showed that the output power average of the PV/T module increased by approximately 5%more than the PV module,and the thermal efficiency of the PV/T system reached to approximately57%,when the flow rate of cooling water varied from 0 kg/s to 0.25 kg/s.In addition,the output power of the PV/T module decreased with the temperature increasing,but the thermal efficiency increased with the water temperature increasing.
引文
[1]Skoplaki E,Palyvos J A.On the temperature dependence of photovoltaic module electrical performance:a review of efficiency/power correlations[J].Solar Energy,2009,83(5):614-624.
[2]Kern J E C,RussellL M C.Combined photovoltaic and thermal hybrid collector systems[R].Boston:Massachusetts Institute of Technology,1978.
[3]胡边,闫素英,张宏治.水冷型PV/T集热器的换热性能研究[J].可再生能源,2015,33(2):164-170.
[4]Florschuetz L W.Extension of the Hottel-Whillier model to the analysis of combined photovoltaic/thermal flat plate collectors[J].Solar Energy,1979,22(4):361-366.
[5]Bergene T,Lovvik O M.Model calculations on a flatplate solar heat collector with integrated solar cells[J].Solar Energy,1995,55(6):453-462.
[6]Zondag H A,De Vries D W,Van Helden W G J,et al.The yield of different combined PV-thermal collector designs[J].Solar energy,2003,74(3):253-269.
[7]Santbergen R,Rindt C C M,Zondag H A,et al.Detailed analysis of the energy yield of systems with covered sheet-and-tube PVT collectors[J].Solar Energy,2010,84(5):867-878.
[8]Fudholi A,Sopian K,Yazdi M H,et al.Performance analysis of photovoltaic thermal(PVT)water collectors[J].Energy Conversion and Management,2014,78:641-651.
[9]Tyagi V V,Kaushik S C,Tyagi S K.Advancement in solar photovoltaic/thermal(PV/T)hybrid collector technology[J].Renewable and Sustainable Energy Reviews,2012,16(3):1383-1398.
[10]Aste N,DEL Pero C,Leonforte F.Water flat plate PV-thermal collectors:a review[J].Solar Energy,2014,102:98-115.
[11]Ji J,Guo C,Sun W,et al.Experimental investigation of tri-functional photovoltaic/thermal solar collector[J].Energy Conversion and Management,2014,88:650-656.
[12]Chow T T,He W,Ji J.An experimental study of facade-integrated photovoltaic/water-heating system[J].Applied Thermal Engineering,2007,27(1):37-45.
[13]He W,Zhang Y,Ji J.Comparative experiment study on photovoltaic and thermal solar system under natural circulation of water[J].Applied Thermal Engineering,2011,31(16):3369-3376.
[14]Dubey S,Tay A A O.Testing of two different types of photovoltaic-thermal(PVT)modules with heat flow pattern under tropical climatic conditions[J].Energy for Sustainable Development,2013,17(1):1-12.
[15]Tiwari A,Dubey S,Sandhu G S,et al.Exergy analysis of integrated photovoltaic thermal solar water heater under constant flow rate and constant collection temperature modes[J].Applied Energy,2009,86(12):2592-2597.
[16]庞玮,于洪文,张林睿,等.环境条件和冷却水流量对光伏光热系统的性能影响[J].可再生能源,2018,36(4):501-505.
[2]Kern J E C,RussellL M C.Combined photovoltaic and thermal hybrid collector systems[R].Boston:Massachusetts Institute of Technology,1978.
[3]胡边,闫素英,张宏治.水冷型PV/T集热器的换热性能研究[J].可再生能源,2015,33(2):164-170.
[4]Florschuetz L W.Extension of the Hottel-Whillier model to the analysis of combined photovoltaic/thermal flat plate collectors[J].Solar Energy,1979,22(4):361-366.
[5]Bergene T,Lovvik O M.Model calculations on a flatplate solar heat collector with integrated solar cells[J].Solar Energy,1995,55(6):453-462.
[6]Zondag H A,De Vries D W,Van Helden W G J,et al.The yield of different combined PV-thermal collector designs[J].Solar energy,2003,74(3):253-269.
[7]Santbergen R,Rindt C C M,Zondag H A,et al.Detailed analysis of the energy yield of systems with covered sheet-and-tube PVT collectors[J].Solar Energy,2010,84(5):867-878.
[8]Fudholi A,Sopian K,Yazdi M H,et al.Performance analysis of photovoltaic thermal(PVT)water collectors[J].Energy Conversion and Management,2014,78:641-651.
[9]Tyagi V V,Kaushik S C,Tyagi S K.Advancement in solar photovoltaic/thermal(PV/T)hybrid collector technology[J].Renewable and Sustainable Energy Reviews,2012,16(3):1383-1398.
[10]Aste N,DEL Pero C,Leonforte F.Water flat plate PV-thermal collectors:a review[J].Solar Energy,2014,102:98-115.
[11]Ji J,Guo C,Sun W,et al.Experimental investigation of tri-functional photovoltaic/thermal solar collector[J].Energy Conversion and Management,2014,88:650-656.
[12]Chow T T,He W,Ji J.An experimental study of facade-integrated photovoltaic/water-heating system[J].Applied Thermal Engineering,2007,27(1):37-45.
[13]He W,Zhang Y,Ji J.Comparative experiment study on photovoltaic and thermal solar system under natural circulation of water[J].Applied Thermal Engineering,2011,31(16):3369-3376.
[14]Dubey S,Tay A A O.Testing of two different types of photovoltaic-thermal(PVT)modules with heat flow pattern under tropical climatic conditions[J].Energy for Sustainable Development,2013,17(1):1-12.
[15]Tiwari A,Dubey S,Sandhu G S,et al.Exergy analysis of integrated photovoltaic thermal solar water heater under constant flow rate and constant collection temperature modes[J].Applied Energy,2009,86(12):2592-2597.
[16]庞玮,于洪文,张林睿,等.环境条件和冷却水流量对光伏光热系统的性能影响[J].可再生能源,2018,36(4):501-505.