温室用地埋管与空气源热泵系统运行特性研究

Study on Operation Characteristics of Ground Pipe and Air Source Heat Pump System in Greenhouse

针对温室种植蔬果类植物进行夏季降温、冬季采暖能源消耗量大、造成能源浪费、温室气体排放等问题,提出了一套温室用地埋管与空气源热泵复合式系统。系统应用跨季节蓄热技术,通过蓄存利用温室收集的太阳能,达到节能减排的目的。利用DeST-h软件建立温室模型,模拟得出温室全年冷热负荷变化特点及热量需求变化规律。为验证该系统的使用效果,选用3栋日光温室进行1年的测试,通过分析室内温度变化,总结出温室在5月初-9月底为蓄热期,11月初-3月中旬为供暖期,其余时间段为过渡期,系统使室温维持在8.9~33.51℃之间,可使植物安全生长。

In order to meet the reasonable temperature requirement of greenhouse vegetable and fruit planting,measures such as cooling in summer and heating in winter were adopted,which consumed a large amount of production materials,resulting in energy waste and greenhouse gas emissions.This paper presents a greenhouse hybrid energy supply system which combines buried pipe with air source heat pump.It can reduce energy consumption by storing and utilizing solar energy collected in greenhouses.In this paper,a greenhouse model is established by using DeST-h software,which simulates the hourly variation of cold and heat load and the change of heat demand in greenhouse.In order to verify the effectiveness of the system,we selected three solar greenhouses for a one-year experiment.By analyzing the indoor temperature changes,it was concluded that the greenhouse was a heat storage period from the beginning of May to the end of September,a heating period from the beginning of November to the middle of March,and a transitional period for the rest of the time.The system maintained the room temperature between 8.9 C and 33.51 C,so that the plants could grow safely.