Abstract A PV integrated greenhouse dryer has been fabricated with a unique solar collector and tested in no-load condition under forced convection mode. Various important thermal performance indicators such as heat utilisation factors, convective heat transfer coefficient, coefficient of performance and percentage of net heat gain have been evaluated to validate the effectiveness of modifications. Energy, electrical and exergy efficiencies have been also analysed for installed PV system for exhaust fan. Greenhouse dryer experiments have been conducted for with and without solar collector conditions. The enhancement in the highest convective heat transfer coefficient for the greenhouse dryer with solar collector condition is 150% in comparison to the absence of solar collector. Heat utilisation factor and coefficient of performance are found 10.1% and 7.9%, respectively, higher than greenhouse dryer without solar collector. The maximum energy and exergy efficiencies are found 16.8% and 21.4% for greenhouse dryer with and without solar collector, respectively. These results represent the effectiveness of solar collector placed inside the dryer and insulated north wall. The designed greenhouse dryer with solar collector is proposed as most suitable dryer for crop drying in the temperature range of 40–70 °C.

中文翻译：

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光伏一体化改造大棚干燥机传热分析

摘要 采用独特的太阳能集热器制作了光伏一体化温室干燥机，并在强制对流模式下进行了空载测试。已经评估了各种重要的热性能指标，例如热利用系数、对流传热系数、性能系数和净热增益百分比，以验证修改的有效性。还对已安装的排气扇光伏系统的能源、电力和火用效率进行了分析。温室干燥器实验已经在有和没有太阳能收集器条件下进行。与没有太阳能收集器的情况相比，具有太阳能收集器条件的温室干燥器的最高对流换热系数提高了 150%。热利用系数和性能系数为 10。分别比没有太阳能集热器的温室干燥机高 1% 和 7.9%。有和没有太阳能集热器的温室干燥机的最大能量和火用效率分别为 16.8% 和 21.4%。这些结果代表了放置在干燥器和绝缘北墙内的太阳能集热器的有效性。设计的带太阳能集热器的温室干燥机被认为是最适合在 40–70 °C 温度范围内干燥作物的干燥机。