Experimental and theoretical performance evaluation of parabolic trough mirror as solar thermal concentrator to thermoelectric generators

Journal article


Memon, S, Mihreteab, M, Katsura, T, Radwan, A, Zhang, S, Serageldin, AA and Abo-Zahhad, EM (2020). Experimental and theoretical performance evaluation of parabolic trough mirror as solar thermal concentrator to thermoelectric generators. International Journal of Solar Thermal Vacuum Engineering. 1 (1), pp. 22-38.
AuthorsMemon, S, Mihreteab, M, Katsura, T, Radwan, A, Zhang, S, Serageldin, AA and Abo-Zahhad, EM
Abstract

This paper presents the prospects of harnessing radiative heat from the sun with a parabolic trough mirror, as a solar thermal concentrator, in comparison to the mathematical model and experimental quartz-halogen concentrator model for the electrical energy conversion utilizing thermoelectric generators (TEG). The construction and design of TEG-setup along with Parabolic trough mirrors and quartz-halogen lamps are presented. The Parabolic trough mirror used as a focal point at a distance of 19.05 cm. With eight quartz-halogen concentrated heat, the maximum performance achieved at ΔT of 11.8 K, Voc of 292 mV and Isc of 95.8 mA, recorded at the concentrated hot-side surface temperature of 317.8 K. When compared to the natural solar concentrated heat, higher temperature of 473.15 K at the hot-side surface temperature of TG was achieved. It is concluded that the heat concentration of the parabolic mirror increases with an increase in the intensity of heat using natural solar radiations. The Voc of 1.76 V and Isc of 1.1 A at a temperature difference of 110 K were measured, which are in good agreement with validated mathematical results. The parabolic through mirror utilized is smaller in size and thus collected lesser sun rays than the larger dish style mirror, and hence the heat in the focal point was very low, for better results, parabolic trough mirror with higher surface area would be important for future experiments.

KeywordsSolar Thermal Energy; Thermoelectrics; Waste Heat Recovery; Parabolic Trough Mirror; Electrical Performance
Year2020
JournalInternational Journal of Solar Thermal Vacuum Engineering
Journal citation1 (1), pp. 22-38
PublisherAkademia Baru Publishing (M) SDN BHD
Digital Object Identifier (DOI)doi:10.37934/stve.1.1.2238
Publication dates
Print18 Jun 2020
Online18 Jun 2020
Publication process dates
Accepted18 Jun 2020
Deposited20 Jun 2020
Publisher's version
License
CC BY
File Access Level
Open
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