|Table of Contents|

The Structural Optimization and Its Application of the Double-tube Multi-curved Trough Air Collector for Solar Greenhouse in Lanzhou

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年07
Page:
65-72
Research Field:
Publishing date:

Info

Title:
The Structural Optimization and Its Application of the Double-tube Multi-curved Trough Air Collector for Solar Greenhouse in Lanzhou
Author(s):
GUO Jianxuan; YANG Huijun; GUAN Yong; HU Wanling; WEI Mingtong; ZHANG Renli
(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou,Gansu 730070)
Keywords:
solar greenhouse; double-tube multi-curved trough collector; structural optimization; orthogonal experiment; engineering application
PACS:
-
DOI:
10.11937/bfyy.20193257
Abstract:
In order to achieve the maximum light convergence rate of the double-tube multi-curved trough air collector,the Monte Carlo ray tracing method was used to ray trace the collectors with different structural parameters,and the signal-to-noise ratio analysis was also used to obtain the optimal structured collector,meanwhile,its heat collecting performances combined with the solar energy active-passive heat storage heating wall of the solar greenhouse in Lanzhou to form an active heat collecting system were examined.The results showed that when the width of the light collector was 670 mm,the width of the light outlet was 210 mm,the total height of the collector was 545 mm,and the height of the secondary reflecting plane mirror was 40 mm,the heat source convergence rate of the double-tube multi-curved trough air collector could reach 100% at the solar incident angle of 0° to 7°.The engineering test results showed that if the cumulative solar radiation intensity was 19 MJ·m-2 and its average outdoor temperature was 1.8 ℃,the collector system with the total length of 10 m and the air velocity of 1.67 m·s-1 in the double tube could obtain 2 115 W for the instantaneous heat collection capacity,and the instantaneous heat collection efficiency was 35.7%,and it was calculated that the accumulated heat collected by the heat collection system in 28 days of winter sunny days was 633 MJ.The results could provide a reference for the optimal design of double-tube multi-curved trough air collector and its practical application.

References:

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Last Update: 2020-07-03