小型冷库多效冷凝制冷机组的能耗及节能分析  

Analysis of energy consumption and energy conservation of multi-effect condensed refrigeration unit in small cold storage

作　　者：刘晓辉[1] 鲁墨森[2] 王淑贞[2] 辛力[2] 张倩[2] 鲁荣 

机构地区：[1]山东理工大学农业工程与食品科学学院,淄博255049 [2]山东省果树研究所,泰安271000 [3]一新保鲜设备厂,泰安271000

出　　处：《农业工程学报》2010年第6期103-108,I0002,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：山东省科技攻关项目(2008GG1009038)

摘　　要：为解决目前我国小型冷库用风冷机组在高温季节运行时存在耗能大、制冷效率低、开机时间过长、压缩机排气压力超高造成故障停机等问题,设计研制出一种集风冷、水冷和蒸发冷却于一体的多效冷凝制冷机组。以10t保鲜冷库(0～3℃)为试验库,在室外温度36℃左右的条件下,利用热电偶、数据采集系统、三相电参量监测仪和计算机处理系统等对多效冷凝制冷机组进行了节能和安全高效运行的试验研究。试验表明:多效冷凝制冷机组平均每次降温用时仅0.38h,与风冷机组比较,节电46%以上,压缩机排气温度降低了28.79℃,排气压力降低了0.9MPa。多效冷凝制冷机组的翅片管簇式换热器冷凝温度较低、温度场均匀。因此,多效冷凝制冷机组应用于小型冷库节能效果显著,属节能、高效、安全型制冷机组。Air-cooled unit is mainly used in small and medium-sized refrigeration storage currently,which still has many problems with higher consumption of energy,inefficiency,longer starting time and failure shutdown due to high compressor exhaust pressure.Multi-effect condensed refrigeration unit combining air-cooled,water-cooled and transpiration-cooled in one was designed.A ten-ton fresh-preserved storehouse whose temperature range was 0-3℃was used as experimental subject.Energy eficiency experiments,safety and efficiency experimental researches were conducted with multi-effect condensed refrigeration unit by using thermocouples,data acquisition system,three-phase electricity parameters monitor,computer processing system etc,which the ambient temperature was kept at 36℃or so.The experimental results showed that per cooling time of multi-effect condensed refrigeration unit was only 0.38 h.Electricity consumption saving of the multi-effect condensed refrigeration unit reached over 46%,28.79℃compressor discharge temperature dropped,and 0.9 MPa exhaust pressure of compressor reduced than air-cooled unit.It had lower condensing temperature and uniform temperature field for fins-and-tubes heat exchanger of multi-effect condensed refrigeration unit.Therefore,multi-effect condensed refrigeration unit has remarkable energy efficiency effect in small cold storage and belongs to energy efficiency,high efficiency and safety refrigerating machine set.

关 键 词：制冷机械 冷库 节能 排气压力 温度场 铜-康铜热电偶 

分 类 号：TQ051.5[化学工程]