THERMAL SCIENCE

International Scientific Journal

Yanan Peng

,

Xuedong Liu

,

Xiaorong Hang

,

Jing Hou

,

Zehui Chang

INVESTIGATION OF PHOTO-THERMAL PERFORMANCE OF COMPOUND PARABOLIC CONCENTRATOR SYSTEM FOR SOIL HEATING IN FACILITY AGRICULTURE

ABSTRACT
Aiming at the large carbon emissions of facility agricultural heating in severe cold regions in winter, a compound parabolic concentrator based soil heating system was presented. The system integrated with novel trough compound parabolic concentrator and was used for soil heating in facility agriculture. Following the structure of the compound parabolic concentrator, TracePro software was selected to trace the light in the compound parabolic concentrator. The variation trend of the light escape rate of the compound parabolic concentrator with the different incident angles was analyzed. Based on the calculation results, the performance of the solar collector system was investigated, and the impact of circulating air velocity on the photo-thermal performance of the solar collector system was explored. Research results indicate that when the circulating air velocity is 1.4 m/s and the average ambient temperature is about 28.9℃, the temperature of the system outlet is up to 90.9℃. The average instantaneous heat collection, maximum photo-thermal conversion efficiency, and unit area heat collection of the system are 740.6 W, 27.83%, and 0.8 MJ/m2, respectively. This research can effectively promote the efficient integration of the solar collector system in facility agriculture.
KEYWORDS
Facility agriculture, solar concentrator, soil, heating, Circulating air velocity
PAPER SUBMITTED: 2022-10-03
PAPER REVISED: 2022-10-18
PAPER ACCEPTED: 2022-11-28
PUBLISHED ONLINE: 2023-01-07
DOI REFERENCE: https://doi.org/10.2298/TSCI221003214P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [3489 - 3500]
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Investigation of photo-thermal performance of compound parabolic concentrator system for soil heating in facility agriculture

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence