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- Title
Design and performance of greenhouse cultivation rack based on phase change materials for heat storage.
- Authors
CHEN Hao; WANG Xiaochan; SHI Yinyan; ZHANG Xianjie
- Abstract
[Objective] A greenhouse cultivation rack based on phase change materials for heat storage was designed to provide reference for dealing with low temperature and cold damage faced by greenhouse crops in winter. [Method] The cultivation rack was constructed by using phase change heat storage and release system, auxiliary heating system and hot air circulation system, the temperature in the planting area and the phase change heat storage and release system under typical sunny conditions and typical cloudy conditions was tested through experiments. The temperature in the planting area was compared with the temperature in the greenhouse. The FLIR infrared imager was used to collect thermal infrared images of leaves of line peppers and tomatoes to verify the heat release and preservation effect. [Result] The average night temperature in the planting area was 1. 2 - 2. 5 °C higher than that in the greenhouse under typical sunny days without auxiliary heating. Under typical cloudy conditions with auxiliary heating at night, the average night temperature in the planting area was 3. 3 - 6. 8 °C higher than that in the greenhouse. Under both sunny and cloudy conditions, the leaf temperature of crops planted in the cultivation rack was higher than that of the crops planted in the greenhouse. The average energy utilization rates of the cultivation rack under typical sunny and cloudy conditions were 65.1% and 56.6% with average coefficient of performance were 9. 3 and 2. 2, respectiveiy. [Conclusion] The designed greenhouse cultivation rack based on phase change materials for heat storage increased temperature significantly in the planting area in winter, which can effectively improve thermal environment for crop growth with significant energy saving effect.
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2022, Vol 50, Issue 2, p135
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2022.02.015