Performance investigation of a concentrating photovoltaic thermal hybrid solar system combined with thermoelectric generators
Performance investigation of a concentrating photovoltaic thermal hybrid solar system combined with thermoelectric generators
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DOI：
10.1016/j.enconman.2019.112377
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发表时间：
2020-02-01
影响因子：
10.4
通讯作者：
Balghouthi, Moncef
中科院分区：
文献类型：
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作者：
Riahi, Afifa;Ali, Abdessalem Ben Haj;Balghouthi, Moncef
聚光光伏热（CPVT）混合太阳能系统为同时生产电能和热能提供了一种有吸引力的技术。将热电发电机与CPVT系统相结合，是进一步提高太阳能转换效率、增加电能的创新途径。本文研究了聚光光伏热（CPVT）和聚光光伏热电（CPVT- te）混合太阳能系统。设计、制造了一种CPVT和热电机组混合动力样机，并进行了试验试验。建立数学模型，分析了CPVT和CPVT- te太阳能系统的电学和热学性能。利用实验数据对模型进行了验证。结果表明，CPVT- te的输出功率高于CPVT，通过热电发电机的集成可以提高电效率。在太阳辐射强度达到935 W/m(2)、环境温度在33℃左右的晴天条件下，CPVT- te系统的日电效率较CPVT系统提高了7.46%。本研究也为CPVT- te太阳能系统的大规模应用提供了契机。对于突尼斯典型的一年，太阳能系统孔径面积为39米(2)，由于热电发电机的集成，CPVT-TE系统可以产生359千瓦时的额外电能。此外，分析证明，该系统每年能够产生可观的电能和热能，可以节省化石能源和相当的二氧化碳排放。
Concentrated photovoltaic thermal (CPVT) hybrid solar systems present an attractive technology for the simultaneous production of electrical and thermal energy. Combining thermoelectric generators with CPVT systems is an innovative way to further enhance the solar energy conversion and increase the electric power. In this study, a concentrated photovoltaic thermal (CPVT) and concentrated photovoltaic thermal thermoelectric (CPVT-TE) hybrid solar systems were investigated. A hybrid CPVT and thermoelectric generator unit prototypes were designed, manufactured and experimental tests were carried out. Mathematical models were established to analyze the electrical and thermal performances of the CPVT and CPVT-TE solar systems. The models were validated by means of the data obtained during the experiments. Results show that the electric power output of the CPVT-TE is higher than that of the CPVT and improvements on the electrical efficiency can be achieved through the integration of the thermoelectric generators. The daily electrical efficiency of the CPVT-TE system was improved by 7.46% as compared with the CPVT system, for a sunny day characterized by solar radiation level reaching 935 W/m(2) and ambient temperature around 33 degrees C. This study was also an opportunity to analyze the large-scale application of the CPVT-TE solar system. For a typical year in Tunisia and a solar system aperture area of 39 m(2), an extra electric energy of 359 kWh could be generated by the CPVT-TE system due to the integration of the thermoelectric generators. In addition, the analysis proves that the system is able to produce a considerable yearly electric and thermal energy and can save fossil energy and equivalent CO2 emissions.