Thermal performance comparison of line- and point-focus solar concentrating systems: Experimental and numerical analyses

被引:18
作者
Hussain, M. Imtiaz [1 ]
Lee, Gwi Hyun [1 ]
机构
[1] Kangwon Natl Univ, Dept Biosyst Engn, Chunchon, South Korea
关键词
LFSC and PFSC; Comparative analysis; Fresnel lens; Collected energy; PARABOLIC TROUGH; HEAT-TRANSFER; COLLECTOR; ENERGY; RECEIVER; DESIGN; FLOW;
D O I
10.1016/j.solener.2016.03.062
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The purpose of this study was to analyze and compare the thermal performances of a line-focus and a point-focus solar concentrators (LFSC and PFSC, respectively) under similar operating and weather conditions in South Korea. Both concentrator systems had Fresnel lenses of the same surface area. To reduce heat loss, absorber pipes of the LFSC and PFSC systems were covered with borosilicate glass tube and foamed polyethylene insulation, respectively. Collector temperature (inlet and outlet temperature differential), collected energy, and thermal efficiency over experimental test time were calculated while the solar radiation, volumetric flow rate, and inlet temperature of the thermal fluid were varied. Good harmony was observed between the experimental and predicted results. Calibration of the both models reduced the deviation between the experimental and predicted temperature results compared to the uncalibrated models. Although both solar collectors showed similar trends in the variations of the average efficiency and total collected energy, these parameters were about 7% and 8% higher, respectively, in the PFSC compared to the LFSC. Overall, the results indicate that the PFSC performs slightly better than the LFSC in terms of the thermal efficiency, total collected energy, and heat loss. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:44 / 54
页数:11
相关论文
共 28 条
  • [1] [Anonymous], 2003, 932003 ANSIASHRAE
  • [2] Performance analysis of photovoltaic-thermal collector by explicit dynamic model
    Chow, TT
    [J]. SOLAR ENERGY, 2003, 75 (02) : 143 - 152
  • [3] Duffie JA, 2013, SOLAR ENGINEERING OF THERMAL PROCESSES, 4TH EDITION, P1, DOI 10.1002/9781118671603
  • [4] A comparative study between parabolic trough collector and linear Fresnel reflector technologies
    El Gharbi, Najla
    Derbal, Halima
    Bouaichaoui, Sofiane
    Said, Noureddine
    [J]. IMPACT OF INTEGRATED CLEAN ENERGY ON THE FUTURE OF THE MEDITERRANEAN ENVIRONMENT, 2011, 6 : 565 - 572
  • [5] Transient performance analysis of cylindrical parabolic concentrating collectors and comparison with experimental results
    Eskin, N
    [J]. ENERGY CONVERSION AND MANAGEMENT, 1999, 40 (02) : 175 - 191
  • [6] Galvez J. B., 2009, SOLAR ENERGY CONVERS, VI
  • [7] Heat transfer analysis and numerical simulation of a parabolic trough solar collector
    Hachicha, A. A.
    Rodriguez, I.
    Capdevila, R.
    Oliva, A.
    [J]. APPLIED ENERGY, 2013, 111 : 581 - 592
  • [8] Estimation of the influence of Fresnel lens temperature on energy generation of a concentrator photovoltaic system
    Hornung, Thorsten
    Steiner, Marc
    Nitz, Peter
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2012, 99 : 333 - 338
  • [9] Performance and economic analyses of linear and spot Fresnel lens solar collectors used for greenhouse heating in South Korea
    Hussain, M. Imtiaz
    Ali, Asma
    Lee, Gwi Hyun
    [J]. ENERGY, 2015, 90 : 1522 - 1531
  • [10] Thermal performance evaluation of a conical solar water heater integrated with a thermal storage system
    Hussain, M. Imtiaz
    Lee, Gwi Hyun
    [J]. ENERGY CONVERSION AND MANAGEMENT, 2014, 87 : 267 - 273