Performance Studies of Heat Transfer Characteristics of High Temperature Fluids Using Parabolic Collectors- A Technical ReviewPages 154-161
P. Mathan ,
N. Vijay Ponraj,
Abstract: Parabolic trough collectors (PTCs) are one of the most promising technologies for solar thermal power generation. The heat transfer characteristics of the working fluid in a PTC show an important role in its thermal performance. This work includes a technical evaluation of the performance investigations of heat transfer characteristics of high temperature fluids utilizing PTCs. The heat transfer performance of a PTC is highly affected by the parameters of the working fluid. Fluids with high heat conductivity and low viscosity are desired for PTCs. This research is a review about the influencing parameters in the performance of heat transfer with high temperature fluid (HTF) in the Parabolic Trough Collector. The technical review done under the following headings. High Temperature Nan fluids and its Characteristics, Theoretical studies of Nano fluids and its Characteristics, Heat transport studies in Nano fluids, Heat Transfer in Parabolic Collectors, Heat Transfer Efficacy of Nano fluids in Parabolic Collectors, Efficiency Analysis of Parabolic Collector’ s Heat Transfer. The flow rate of the working fluid also has a substantial impact on the heat transfer performance. A higher flow rate often leads to improved heat transfer performance. The design of the receiver is also critical for the heat transfer performance of a PTC. Receivers with a greater surface area and better heat transfer coefficients can achieve higher thermal efficiency. Nano fluids have been shown to progress the heat transfer performance of Parabolic Trough Collectors. However, the use of nano fluids also brings significant obstacles, such as the agglomeration of nano particles and the clogging of the receiver tubes. New heat transfer enhancement techniques, such as swirl flow and vortex generators, have been developed for PTCs. These strategies can considerably increase the heat transfer performance of PTCs. This comparison study provides the information about the properties, characteristics, and applications of the high temperature fluids in various heat transfer applications. Keywords: Parabolic trough collectors, High temperature fluid, Heat transfer, Nano fluids
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