Research on simulation of energy consumption of ground water-source heat pump air conditioning system in plant factory

Abstract

The study of low-cost energy supply methods for large plant factories in China is of great significance to promote the healthy and steady development of large greenhouses. Aiming at the problems of high cost, poor stability, chaotic production management, and no indicator of long-term operation energy consumption in the operation of large plant factories, this paper analyzes long-term operation data by studying the heating situation of Chongming plant factory to improve plant factory regulation methods for the purpose of energy saving and cost reduction. A plant factory model was constructed using TRNSYS to simulate typical annual energy supply throughout the year to obtain cooling and heating energy consumption. The simulation results show that the annual peak heat load of the plant factory is 1502.6 kW and the peak cooling load is 913.8 kW. The annual energy consumption of the whole plant factory is 3799.12 GJ for cooling and 4468.34 GJ for heating, and the annual energy consumption of the whole plant factory is 8267.46 GJ. A8 and its three surrounding greenhouses A6, A7, and A10 can be used as a single zone for energy supply. This zone takes advantage of the structural characteristics of the building to reduce energy consumption. The simulation shows that the ground source heat pump system is sufficient to supply the energy consumption of these four greenhouses and even to achieve the optimal temperature conditions for growing vegetables inside them.