罐装牛奶制冷的系统设计

<正> 牛奶场的罐装牛奶制冷由于其固有的性质是压缩机的一种恶劣应用场合。虽然其运行范围适应设计用于高温应用的压缩机的能力范围内,其设备的位置,安装和全年运行可能造成常规商用制冷应用所没有的潜在危险。 1.从进空罐的热牛奶到满罐时的4℃,负载变化极大。结果是蒸发器液体制冷剂的需要量变化很大,并且对压缩机电机可能有极端负载。 2.农村地区可能电力不足,且可能在最高需用电时电压降低。

System Design for Bulk Milk Tank Refrigeration

The refrigeration of bulk tanks on dairy farms by its inherent nature is a beverage application for a compressor. While the operating range is well within the capabilities of a compressor designed for high temperature application, the location, installation, and year round operation of the equipment may result in many potential operating hazards not present in a conventional commercial refrigeration application. Obviously with all of these potential sources of trouble, a compressor on a bulk milk tank can be exposed to a very severe and adverse operation conditions unless proper system design precautions are taken. Accessible hermetic compressors, because of their rugged construction, are undoubtedly better able to live through periods of operating abuse, but because of their lower first costs, welded hermetic motor-compressors are being increasingly applied on bulk milk tanks. The following design recommendations should be considered on any direct expansion bulk milk installation; they are required on any direct expansion welded hermetic compression application to insure satisfactory performance and life. And in this article,Emerson will show us this advanced refrigeration system. which included its Compressor Electrical Characteristics,Location of the Condensing Unit,Suction Accumulator,Pressure Limiting Expansion Valve,Crankcase Heater,Quick Disconnect Refrigerant Fittings,Pumpdown Control,Low Ambient Head Pressure Control,Suction Line Filter,Liquid LineFilter Drier,High and Low Pressure Controls,and Oil Separator.