工程热力学

Annual Optimal Performance Analysis of Micro Heat Pipe PV/T under Different Angles in Northwest China

  • LIU Xiaomin ,
  • WU Qingbai ,
  • LI Jinping ,
  • Vojislav NOVAKOVIC
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  • 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
    2. Collaborative Innovation Center for Supporting Technology of Northwest Low-Carbon Towns, Lanzhou 730050, China
    3. Gansu Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou 730050, China
    4. Gansu Natural Energy Research Institute, Lanzhou 730050, China
    5. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim NO-7491, Norway

网络出版日期: 2025-03-04

基金资助

The funding support from the Ministry of Science and Technology of China (MOST project number 2019YFE0104900), the Research Council of Norway (NRC project number 304191-ENERGIX), National Natural Science Foundation of China (No. 51676094), the Key S&T Special Projects of Gansu Province (22ZD6WA056), the Key R&D Program of Gansu Province (23YFGA0035), the Key S&T Special Projects of Gansu Natural Energy Research Institute (2024ZD-01), Construction Science and Technology Project of Gansu Provincial Department of Housing and Urban Rural Development (JK2022-50).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Annual Optimal Performance Analysis of Micro Heat Pipe PV/T under Different Angles in Northwest China

  • LIU Xiaomin ,
  • WU Qingbai ,
  • LI Jinping ,
  • Vojislav NOVAKOVIC
Expand
  • 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
    2. Collaborative Innovation Center for Supporting Technology of Northwest Low-Carbon Towns, Lanzhou 730050, China
    3. Gansu Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou 730050, China
    4. Gansu Natural Energy Research Institute, Lanzhou 730050, China
    5. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim NO-7491, Norway

Online published: 2025-03-04

Supported by

The funding support from the Ministry of Science and Technology of China (MOST project number 2019YFE0104900), the Research Council of Norway (NRC project number 304191-ENERGIX), National Natural Science Foundation of China (No. 51676094), the Key S&T Special Projects of Gansu Province (22ZD6WA056), the Key R&D Program of Gansu Province (23YFGA0035), the Key S&T Special Projects of Gansu Natural Energy Research Institute (2024ZD-01), Construction Science and Technology Project of Gansu Provincial Department of Housing and Urban Rural Development (JK2022-50).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

摘要

PV/T系统可以同时将太阳辐射转化为电能和热能,其在太阳资源丰富的中国西北地区具有巨大的潜力。本文通过在兰州进行的详尽实验分析,评估了一种微型热管(M-HP)PV/T系统的效能。为了提高M-HP-PV/T系统的性能,研究对比了每日和全年最佳倾角。温室内的系统表现出平均电能转换效率(PCE)为12.32%和热能转换效率(TCE)为42.81%。外部环境中的系统则记录了平均PCE和TCE分别为12.99%和21.08%。为了进一步理解系统的运行结果,通过整合实验数据构建了一个数学模型,模拟结果与实测观察结果吻合良好。每日最佳倾角的平均太阳辐照度为728.3 W/m2,全年最佳倾角为29°,其平均太阳辐照度为705.6 W/m2。温室内外最佳角度的年平均总功率分别为 448.0 W和398.7 W。温室外和温室内最佳角度的年平均总效率分别为40.8%和56.9%。温室内的总功率降低了49.3 W,而温室内的总效率提高了16.1%。

本文引用格式

LIU Xiaomin , WU Qingbai , LI Jinping , Vojislav NOVAKOVIC . Annual Optimal Performance Analysis of Micro Heat Pipe PV/T under Different Angles in Northwest China[J]. 热科学学报, 2025 , 34(2) : 400 -412 . DOI: 10.1007/s11630-025-2082-9

Abstract

The exploitation of photovoltaic/thermal (PV/T) systems, which facilitate concurrent conversion of solar radiation into electrical and heat energies, presents substantial potential in the solar-abundant northwestern zone of China. This investigation endeavors to evaluate the efficacy of a micro heat pipe (M-HP) PV/T system via exhaustive experimental analysis conducted in Lanzhou. To improve the performance of M-HP-PV/T system, a comparison was made between the optimal angles for each day and the entire year. The system inside greenhouse exhibited an average photovoltaic conversion efficiency (PCE) and thermal conversion efficiency (TCE) of 12.32% and 42.81%. The system of external environment registered average PCE and TCE values of 12.99% and 21.08%. To further understand the system’s operational results, a mathematical model was constructed through the integration of experimental data, exhibiting good agreement between the simulated outcomes and empirical observations. The average solar irradiance of daily optimum angle was 728.3 W/m2; the annual optimum angle was 29° with an average solar irradiance of 705.6 W/m2. The average annual total powers at the optimal angle outside the greenhouse and inside the greenhouse were 448.0 W and 398.7 W. The average annual total efficiencies at the optimal angle outside the greenhouse and inside the greenhouse were 40.8% and 56.9%. The total power in the greenhouse was lower by 49.3 W, while total efficiency in the greenhouse was higher by 16.1%.

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