Design and Evaluation of an Innovative Thermoelectric-Based Dehumidifier for Greenhouses

文献类型： 外文期刊

第一作者： Han, Xiaobei

作者： Han, Xiaobei;Cai, Yuliang;Han, Xiaobei;Cai, Yuliang;Wang, Dequn;Wei, Xiaoming;Shi, Rongchao;Guo, Wenzhong;Liu, Tianxiang;Hai, Yunrui

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关键词： thermoelectric cooling; dehumidifier; air temperature; relative humidity; greenhouse environment

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 5 期

页码：

收录情况： SCI

摘要： Crops in greenhouses located in cold climates are frequently affected by high relative humidity (RH). This study presents the design, testing, and analysis of a dehumidifier based on thermoelectric cooling. Thermoelectric dehumidifiers (TEDs) are capable of dehumidifying greenhouses in cold regions while recovering heat for indoor air heating. The design of a TED is based on the specific characteristics of thermoelectric coolers (TECs). A TED consists of a cabinet, four heat exchangers, a duct fan, a water pump, and auxiliary components. The TED performance was evaluated in a Chinese solar greenhouse (CSG) with a volume of approximately 160 m3. The input voltage of the TECs, fan airflow rate, and cold-side fin area affected the TED performance, with their influence varying in magnitude. The radar chart results show that the optimal operating parameters are as follows: a fan airflow rate of 300 m3/h, a TEC input voltage of 15 V, and a cold-side fin area of 0.15 m2. With the TED running for 120 min under the optimal parameters, the RH in the CSG decreased by 25.5%, while the air temperature increased by 3.4 degrees C. The installation of the TED at the bottom of the CSG improved the growing environment of the crops, particularly in the vertical range between 0.2 m and 1.5 m height inside the greenhouse. These findings provide a valuable reference for applying thermoelectric cooling technology in the greenhouse field.

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