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Journal of Enhanced Heat Transfer

Published 8 issues per year

ISSN Print: 1065-5131

ISSN Online: 1563-5074

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

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PERFORMANCE ANALYSIS OF A-SI PHOTOVOLTAIC/THERMAL SYSTEM USING OPTIMIZED DIRECT ABSORPTION COLLECTOR

Volume 19, Issue 2, 2012, pp. 123-134
DOI: 10.1615/JEnhHeatTransf.2012002725
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ABSTRACT

This paper extends our previous study on the photovoltaic/thermal system from the optimum optical properties of the working fluid to the system performance analysis. The system consists of a photovoltaic module using an a-Si solar cell and a thermal unit based on the direct absorption collector (DAC) concept. The system separately utilizes the solar radiation due to the advantages of the working fluid absorbing infrared radiation from 760 to 2000 nm and the transmitted visible light from 300 to 760 nm by the solar cell. In the system, the thermal unit absorbs 89% of the infrared radiation and transmits 84% of the visible light. The a-Si solar cell electrical efficiency varies slightly between 7.9% and 8.1% for various working fluid inflow temperatures. When reducing the mass flow rate of the working fluid, the thermal efficiency decreases; however, the outflow temperature of the working fluid reaches 77° C constant electrical efficiency about 8%. Moreover, the exergetic evaluation was adopted to quantitatively study the electrical energy and thermal energy conversion; the result confirms the existence of flow rate maximizing the total efficiency (optimum flow rate). Finally, when the incident solar irradiance is concentrated from 800 to 4000 W/m2 with the optimum flow rate 6 kg/h and working fluid inflow temperature 25° C, the total exergetic efficiency increases 5%, and the system generates 177°C high-grade heat, while the electrical efficiency is sacrificed slightly, around 1.3%.

CITED BY
  1. Sharaf Omar Z., Orhan Mehmet F., Concentrated photovoltaic thermal (CPVT) solar collector systems: Part II – Implemented systems, performance assessment, and future directions, Renewable and Sustainable Energy Reviews, 50, 2015. Crossref

  2. Song Yongchen, Wang Pengfei, Jiang Lanlan, Zhao Yuechao, Yang Mingjun, Methane hydrate formation/reformation in three experimental modes: A preliminary investigation of blockage prevention during exploitation, Journal of Natural Gas Science and Engineering, 27, 2015. Crossref

  3. Ju Xing, Xu Chao, Han Xue, Du Xiaoze, Wei Gaosheng, Yang Yongping, A review of the concentrated photovoltaic/thermal (CPVT) hybrid solar systems based on the spectral beam splitting technology, Applied Energy, 187, 2017. Crossref

  4. Wang Pengfei, Yang Mingjun, Chen Bingbing, Zhao Yuechao, Zhao Jiafei, Song Yongchen, Methane hydrate reformation in porous media with methane migration, Chemical Engineering Science, 168, 2017. Crossref

  5. Wang Pengfei, Wang Shenglong, Song Yongchen, Yang Mingjun, Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction, Applied Energy, 227, 2018. Crossref

  6. Yang Lei, Liu Yulong, Zhang Hanquan, Xiao Bo, Guo Xianwei, Wei Rupeng, Xu Lei, Sun Lingjie, Yu Bin, Leng Shudong, Li Yanghui, The status of exploitation techniques of natural gas hydrate, Chinese Journal of Chemical Engineering, 27, 9, 2019. Crossref

  7. Wang Shenglong, Yang Mingjun, Wang Pengfei, Zhao Yuechao, Song Yongchen, In Situ Observation of Methane Hydrate Dissociation under Different Backpressures, Energy & Fuels, 29, 5, 2015. Crossref

  8. Hong Wenpeng, Li Boyu, Li Haoran, Niu Xiaojuan, Li Yan, Lan Jingrui, Recent progress in thermal energy recovery from the decoupled photovoltaic/thermal system equipped with spectral splitters, Renewable and Sustainable Energy Reviews, 167, 2022. Crossref

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