无氟制冷剂HCR22热管低温储粮温度动态特征  

Temperature dynamics of the heat-pipe low-temperature grain storage with fluorine-free refrigerant HCR22

作　　者：刘金光[1,2] 刘玉茜 王世清 蔺新茹[3] 曲亚男 姜文利 Liu Jinguang;Liu Yuqian;Wang Shiqing;Lin Xinru;Qu Yanan;Jiang Wenli(Food Science and Engineering College,Qingdao Agricultural University,Qingdao 266109,China;Qingdao Key Laboratory of Modern Agricultural Quality and Safety Engineering,Qingdao 266109,China;Food Science and Engineering College,Shandong Agricultural University,Taian 271018,China)

机构地区：[1]青岛农业大学食品科学与工程学院,青岛266109 [2]青岛市现代农业质量与安全工程重点实验室,青岛266109 [3]山东农业大学食品科学与工程学院,泰安271018

出　　处：《农业工程学报》2022年第20期286-292,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(32102049,31271963)。

摘　　要：为解决机械制冷低温储粮存在的高能耗、环境不友好等问题,该研究基于低温热管储粮和无氟制冷剂HCR22蓄冷方面的研究,设计并开发了使用自然冷源蓄冷的低温试验粮仓,其结构包括热管组、温度检测系统和结露控制系统等,热管工质选用新型无氟制冷剂HCR22。为研究低温试验粮仓的蓄冷性能,对HCR22热管仓房储粮过程热管组和储粮温度的动态特征规律进行研究。结果表明:HCR22热管仓房365 d储粮期间小麦温度持续低于16℃,最低可降至-3.10℃,仓内不同位置降温均匀、平缓,实现了小麦的低温或准低温储藏;储藏期间小麦含水量下降0.29%,籽粒浸出液电导率值提升4.20μS/cm。该研究为中高纬度地区提供一种无能耗、环境友好型储粮新方式,为绿色储粮技术升级提供科学依据。Storage quality has posed a great influence on the grain security in recent years.It is of great social significance to improve the management level of warehousing for the high quality of stored grain.Traditional grain storage cannot fully meet large-scale production,due to the high energy consumption and environmental problems.It is necessary to develop the green technology of low-temperature grain storage by mechanical refrigeration.In this study,an environment-friendly low-temperature granary was designed using the natural coldness resource.The cold storage was used as the heat pipe with the fluorine-free refrigerant HCR22.The heat-pipe low-temperature grain storage was mainly composed of the grain warehouse,heat pipe group,real-time temperature detection system,dewing control system,and pressure detector.The new fluorine-free hydrocarbon refrigerant HCR22 was selected as the circulating medium of the heat pipe group,rather than the traditional Freon refrigerant R22.A test granary was installed to verify the practical feasibility of the low-temperature heat-pipe system.The test position was selected in the middle and high latitudes with a temperate monsoon climate,located in the Chengyang District,Qingdao,Shandong Province,China(120°12′E,36°20′N).The dynamic parameters of grain temperature were measured in the different positions at the evaporation section of the HCR22 and R22 heat-pipe warehouse using a multi-channel temperature recorder during 365-day grain storage.The warehouse without a heat pipe was set as the control group.An electrical conductivity meter was also utilized to detect the moisture content of wheat and the conductivity of grain leaching solution.The results showed that the HCR22 refrigerant performed the lower temperature grain storage with the natural cold source in the heat-pipe cold storage,compared with the Freon refrigerant R22.The running time of the HCR22 heat-pipe warehouse was from November 25 to March 10 of the next year(a total of 108 days of cold storage).The cyclic proces

关 键 词：温度 粮食 储藏 无氟制冷剂 低温热管 自然冷源 

分 类 号：TS210.1[轻工技术与工程—粮食、油脂及植物蛋白工程]