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A STUDY OF AN OPTIMUM PARABOLIC TROUGH CONCENTRATOR DESIGN FOR POSSIBLE POWER GENERATION IN MALAYSIA

MAHINDER SINGH, BALBIR SINGH (2004) A STUDY OF AN OPTIMUM PARABOLIC TROUGH CONCENTRATOR DESIGN FOR POSSIBLE POWER GENERATION IN MALAYSIA. PhD thesis, Universiti Teknologi Petronas.

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Abstract

The aim of this research work is to design an optimum parabolic trough concentrator, where the optimum design parameters are identified by using simulation method. A new parabolic trough concentrator model was proposed. The new model, based on a standard model of a parabolic trough concentrator, has back copper tubes attached to the parabolic concentrator. The back copper tubes are expected to pick up the surplus heat on the iron concentrator due to incoming solar radiation that is not reflected. Simulations were carried out by using software programmed specifically for this research work and by using the outcomes from simulation, an experimental new model was fabricated based on optimum design parameters. The optimisers that were identified by simulations are the rim angle, concentration ratio, acceptance half-angle and receiver's absorber tube size. The optimum value for rim angle is 90° and concentration ratio is 10. The acceptance half-angles falls in the range between 1.55° and 1.72°, where the optimum diameter for the receiver's absorber tube range between 27 mm and 30 mm. A rim angle of 90° can be obtained when the parabolic depth becomes equal to the focus point. The receiver's absorber tube diameter size was 30 mm, where for the concentration ratio to be 10, the width was calculated as 1.0 m and depth and focus point was set at 0.25 m. The length of the concentrator at 1.83 m was determined by using the thermal module simulation and was also subjected to the budget availability. The simulation software was used to evaluate the performance of the new design with the optimum parameters by using the meteorological data for Bayan Lepas, Ipoh, XX Ill Cameron Highlands, Kuantan and Senai. The maximum instantaneous simulated outlet fluid temperature achieved is 133.8 °C for Ipoh. The maximum instantaneous experimental outlet temperature achieved on the 61 h July 2003 by using the prototype model was ( 143.8 ± 0.5 ) oc, at an average direct and diffuse solar insolation of 2.57 MJ/m2 and 0.81 MJ/m2 respectively, with a mass flowrate ofO.Ol kg/sand ambient temperature of ( 31.3 ± 0.5 ) °C. The performance of the model with and without the back tubes was compared where the difference between average values was (11.8 ± 4.0 )°C, which was approximately ( 14.0 ± 5.0) % increase in the outlet fluid temperature. The working fluid used in this research work is saturated water.

Item Type: Thesis (PhD)
Academic Subject : Academic Department - Electrical And Electronics - Power Systems - Generation - Solar Power Generation
Subject: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Engineering > Electrical and Electronic
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:47
URI: http://utpedia.utp.edu.my/id/eprint/8035

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