Energy contribution and loss of greenhouse-type drying chamber in multi-energy drying system: Heat distribution and exergy efficiency

Ran Li, Guochen Zhang, Qian Zhang, Tong Yuan, Na Wang, Xiuchen Li, Gang Mu and Chengxiang Kang

Renewable Energy, 2024, vol. 237, issue PB

Abstract: In this paper, the relationship between the structural design of the greenhouse drying chamber and energy contribution and loss is discussed from the perspective of energy saving and system performance, and the rationality of their design is analyzed based on the exergy efficiency. Taking the multi-energy drying system of kelp as an example, the airflow and temperature distributions of different greenhouse-type drying chambers were simulated and optimized by using the computational fluid dynamics (CFD) method, and the heat transfer and loss were analyzed. The results show that the optimized drying chamber has an increase of about 40 % in The results show that the optimized drying chamber has an increase of about 40 % in exergy efficiency and a reduction of about 37 % in exergy damage. The average energy efficiency of the greenhouse-type drying chamber was more than 80 % with a size of 5000 × 2500 × 2300 mm, a tilt angle of 22.5°, and fans of 7. In addition, the energy efficiency was negatively correlated with the temperature difference between the inlet and outlet and positively correlated with the ambient temperature. Despite the heat loss in the drying chamber, its contribution to the system's overall energy efficiency is significant.

Keywords: Greenhouse-type drying chamber; Exergy efficiency; Energy contribution; Physical field distribution; Multi-energy (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:237:y:2024:i:pb:s0960148124017208

DOI: 10.1016/j.renene.2024.121652

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