Abstract
The air source heat pump (ASHP) using electric energy instead of traditional wood burning to dry cash crops has the advantages of high automation, energy saving and environmental protection, cost reduction, and efficiency. Aiming to evaluate the energy efficiency in the process of electric heat conversion and drying heating of air source heat pumps, two levels of energy efficiency indexes have been proposed. The primary energy efficiency index can measure the utilization efficiency of electric heat conversion and recovery, and the secondary index can directly measure the output efficiency of electric energy on output. Aiming to improve the automatic ability of the drying system, a remote monitoring system of air source heat pump drying system has been designed and developed based on the Internet of Things (IoT), which can monitor the operation process and status of air source heat pump drying system online in real-time in the cloud and handheld terminal, and control the process flow of drying operation, and also can calculate the two-level energy efficiency indexes. The remote monitoring system based on IoT plays the role of protection and electricity safety. The drying experiments of edible mushrooms show that the IoT air source heat pumping drying system has the advantages of high automation, high efficiency, and convenience, and can effectively evaluate the energy efficiency of the air source heat pump in the drying process of edible mushrooms.
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