Simplified heat-transfer calculation for the trapezoidal cross-section wall in Gobi solar greenhouses and greenhouse thermal-load prediction

被引:3
作者
Zhang, Xiaodan [1 ]
Xie, Jianming [1 ]
Zhang, Jing [1 ]
Li, Jing [1 ]
Ma, Ning [1 ]
Mao, Erye [1 ]
机构
[1] Gansu Agr Univ, Coll Hort, Lanzhou 730070, Peoples R China
基金
中国国家自然科学基金;
关键词
Greenhouse heavyweight wall; Solar energy; Dynamic heat transfer; Frequency-domain finite-element; model; Simplified method; TIME-DOMAIN; PERFORMANCE; VALIDATION; SIMULATION; CONDUCTION; BUILDINGS; GAIN;
D O I
10.1016/j.biosystemseng.2023.08.014
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Gobi solar greenhouses (GSGs) with trapezoidal cross-section walls, through the passive utilisation of solar energy, provide appropriate environmental conditions for sustainable crop growth in otherwise non-arable lands. The Hexi Corridor in China is known for its serious desertification and cold climate putting pressure on the regional GSG production; there, auxiliary heating strategies according to the greenhouse thermal load are required for maintaining plant thermal comfort. However, the highly transient heat transfer of the trapezoidal cross-section wall makes the GSG thermal-load evaluation challenging. This study proposes a new, simple, and accurate approach for calculating the dynamic heat transfer of the trapezoidal cross-section wall. The heat-transfer resistances quantifying the steady-state thermal behaviour of the wall and the unit frequency-response functions describing the transient one were obtained by using discrete Fourier series and a twodimensional frequency-domain finite-element model. These predetermined factors allowed the calculation of the hourly space-heat gain through the trapezoidal cross-section wall in a spreadsheet under arbitrary boundary conditions. The new approach was experimentally validated under different weather conditions. Furthermore, a GSG thermal load prediction model was developed. The results showed that, in a typical sunny phase, the heating load occurred around 8:00 and lasted four hours every day, averaging 0.56 GJ per day; in the coldest phase, the heating load occurred during the entire daytime and part of the night-time, averaging 1.42 GJ per day. This approach should be insightful regarding the heating-system planning during GSG design and environment-regulating judgement during GSG operation. (c) 2023 IAgrE. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:46 / 65
页数:20
相关论文
共 51 条
[1]   Modeling heating demands in a Chinese-style solar greenhouse using the transient building energy simulation model TRNSYS [J].
Ahamed, Md Shamim ;
Guo, Huiqing ;
Tanino, Karen .
JOURNAL OF BUILDING ENGINEERING, 2020, 29
[2]  
[Anonymous], 1997, ASHRAE HDB FUND
[3]   Internal evaporation and condensation characteristics in the shallow soil layer of an oasis [J].
Ao, Yinhuan ;
Han, Bo ;
Lu, Shihua ;
Li, Zhaoguo .
THEORETICAL AND APPLIED CLIMATOLOGY, 2016, 125 (1-2) :281-293
[4]  
ASHRAE, 2017, 2017 ASHRAE HDB FUND
[5]   Evaluation of the thermal performance parameters of an outside wall made from lignocellulosic sand concrete and barley straws in hot and dry climatic zones [J].
Belhadj, B. ;
Bederina, M. ;
Dheilly, R. M. ;
Mboumba-Mamboundou, L. B. ;
Queneudec, M. .
ENERGY AND BUILDINGS, 2020, 225
[6]   Using solar greenhouses in cold climates and evaluating optimum type according to sizing, position and location: A case study [J].
Cakir, Ugur ;
Sahin, Erol .
COMPUTERS AND ELECTRONICS IN AGRICULTURE, 2015, 117 :245-257
[7]   Theoretical and experimental development of cooling load temperature difference factors to calculate cooling loads for buildings in warm climates [J].
Catalina Vallejo-Coral, E. ;
Rivera-Solorio, C., I ;
Gijon-Rivera, M. ;
Zuniga-Puebla, Hugo F. .
APPLIED THERMAL ENGINEERING, 2019, 150 :576-590
[8]   Energy saving strategies in sustainable greenhouse cultivation in the mediterranean climate - A case study [J].
Chahidi, Laila Ouazzani ;
Fossa, Marco ;
Priarone, Antonella ;
Mechaqrane, Abdellah .
APPLIED ENERGY, 2021, 282
[9]   Thermal performance of an active-passive ventilation wall with phase change material in solar greenhouses [J].
Chen, Chao ;
Ling, Haoshu ;
Zhai, Zhiqiang ;
Li, Yin ;
Yang, Fengguang ;
Han, Fengtao ;
Wei, Shen .
APPLIED ENERGY, 2018, 216 :602-612
[10]  
[崔亚平 Cui Yaping], 2019, [太阳能学报, Acta Energiae Solaris Sinica], V40, P586