A brief review on analysis and recent development of parabolic trough collector

Abstract

• At present-day, the conventional energy sources like coal and petroleum gradually deplete due to their excessive usage and it pollute the atmosphere also. • So, to reduce the pollution and fulfil the escalating requirement of energy, alternative energy sources have been discovered from nature. • Solar energy is type of renewable energy. Most common process to accumulate solar energy is solar collector. Based on the accumulation method, solar collector has been divided into two categories; one of which is focused or concentrating solar collector. • Parabolic Trough Collector (PTC) is one kind of concentrating solar collector, where solar beam gets reflected from parabolic reflector and accumulated at the outer surface of an absorber tube. • In this paper, an overview of those outstanding works has been presented. A short review of various techniques and findings by different researchers has been introduced here in a good manner. Currently, conventional energy sources, such as coal and petroleum, are gradually being depleted because of their excessive usage and atmospheric pollution. Therefore, alternative energy sources have been discovered to reduce pollution and satisfy escalating energy needs. This type of energy, known as renewable energy, can be harnessed from. Solar energy is a renewable energy source. The most common method for accumulating solar energy is the use of solar collectors. Based on the accumulation method, solar collectors can be divided into focused and concentrated. Parabolic trough collectors (PTCs) are a of concentrating solar collector in which a solar beam is reflected by a parabolic reflector and accumulates at the outer surface of the absorber tube. The fluid flowing through the inner surface of the tube carries heat and either stores it or uses it for different purposes, such as cooking, industrial heating, and room heating. Many studies have assessed PTC system performance. The performance of a PTC depends on different factors, such as the collector surface, collector material, receiving tube, type of fluid carrying the heat, incident angle, and wind load. Many have been conducted to improve these parameters and PTC efficiency. Moreover, the use of metal foam absorbers in the receiver tube reduces heat loss by 45%. Molten salt as a heat -transfer fluid results in 70.5% increase in thermal efficiency, and Cu nano-fluid yields a 5% increase in receiver efficiency. In addition, tubes exhibit 25% higher performance than steel tubes. The modified fiber-glass-reinforced PTC exhibits 70% efficiency. In addition, graphene oxide nanofluid has been considered the best fluid to enhance photovoltaic thermal performance. This paper presents a brief review of the various techniques and findings of relevant.

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