Effect of transmittance reduction on performance of flat-plate solar collector when increasing covers number using "TRNSYS" program
Article Sidebar
-
The flat-plate solar collector, Transmissivity of transparent covers, Absorptivity of transparent covers, Reflectivity of transparent covers,
Abstract
The transmittance of a flat-plate solar collector decreases when the number of its covers are increased, and its performance rates change accordingly. This paper presents the process of verifying this through a set of comparisons that include the efficiency of the solar collector, the temperature of the outlet water, and the amounts of heat energy gained and lost from this collector when it is provided with one cover, two covers, and three transparent covers. The digital simulation was conducted on a simple solar domestic water heating system using TRNSYS software. Dynamic simulations demonstrated that increasing the number of transparent covers resulted in a significant decrease in the optical efficiency of this collector due to the reduction of transmittance. Although this procedure has limited the total heat loss by radiation, convection, and conduction. However, in general, there was a continuing trend of declining overall efficiency as a result of the increase in the number of covers.
Full text article
References
[1]-Chen, C.J., "Physics of Solar Energy", John Wiley & Sons, Inc.2011.
[3]-Domanski, R., Azaan, G., "Design Criteria for Optimum Solar Water-Heating System for Warsaw", Warsaw University of Technology (PW), Institute of Heat Engineering (ITC), proceedings of FUTURESTOCK'2003 9th International Conference on Thermal Energy Storage Warsaw, POLAND September 1-4,2003
[4]-Azaan, G., Domanski, R., "Simulation and Design Criteria for Solar Domestic Water Heating System at Sabha –Libya", International Conference for Energy and Environment, 14-15 October 2003, Brack –Libya.
[5]-Haddadi, N., and others, "Effect of Glazing Number on the Performance of a Solar Thermal Collector", International Journal of Science and Research (IJSR), Volume 3 Issue 6, June 2014.
[6]-Sagunto, M.S., Chowdhury, A.S., "A Review of Solar Flat Plate Thermal Collector", ResearchGate, 2021.
[7]-Wedel, R.K., Marshall, K.N., "Optical Properties of Materials as Applied to Flat Plate Solar Collector Design", SPIE, 2022.
[8]-A Transient Systems Simulation Programmers, https://sel.me.wisc.edu/trnsys/ [9]-Azzain, G., "'TRNSYS' a Complete Digital Experimentation Platform and Simulation Studio for Transient Systems andIntelligent Buildings", The Journal of Sebha University for applied Sciences, Sebha Libya, Oct. 2010.
[10]-Kalogirou, S.A., "Solar Energy Engineering Processes and Systems", Elsevier Inc. 2009.
[11]-Foster, R., Ghassemi, M., Cota, A., "Solar Energy Renewable Energy and The Environment", Taylor and Francis Group, LLC, 2010.
[12]-Struckmann, F., "AnalysisofaFlat-plateSolarCollector", LundSweden,May08,2008.
[13]-Howell, J.R., Bannerol, R.B., Vliet, G.C., "Solar-Thermal Energy Systems", McGraw-Hill, Inc. 1982.
[14]- http://esc.fsu.edu/documents/lectures/SP07/EML4930L7.pdf
]15[- نصار، ياسر، "هندسة الطاقة الشمسية التطبيقات الحرارية الفعالة"، (الطبعة الأولى)، دار الكتب الوطنية –
بنغازي،
Authors
Copyright (c) 2023 Journal of Pure & Applied Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
In a brief statement, the rights relate to the publication and distribution of research published in the journal of the University of Sebha where authors who have published their articles in the journal of the university of Sebha should how they can use or distribute their articles. They reserve all their rights to the published works, such as (but not limited to) the following rights:
- Copyright and other property rights related to the article, such as patent rights.
- Research published in the journal of the University of Sebha and used in its future works, including lectures and books, the right to reproduce articles for their own purposes, and the right to self-archive their articles.
- The right to enter a separate article, or for a non-exclusive distribution of their article with an acknowledgment of its initial publication in the journal of Sebha University.
Privacy Statement The names and e-mail addresses entered on the Sabha University Journal site will be used for the aforementioned purposes only and for which they were used.