January 1, 2011
Ammonia Refrigeration System Process
1. Single-stage ammonia refrigeration cycle
Comparison of single-stage refrigerator is a broad class of refrigerator, which can be applied to ice, air conditioning, food refrigeration and industrial processes and so on.Single-stage refrigeration cycle is the refrigerant in the refrigeration system have been compressed, condensation, throttling, the process of evaporation of four, will complete the cycle of single-stage cryocooler, which reached a cooling purposes.
By the refrigeration system evaporator, single-stage compressor, oil separator, condenser, ammonia storage device, ammonia liquid separation, the throttle valve, and other ancillary equipment and other components, with each other through the pipe connection into a closed system. Where the evaporator is cold transport equipment, liquid refrigerant evaporates absorbing the heat to achieve the object being cooled refrigeration; compressor is the heart of the system, play a suction, compression, transmission role of refrigerant vapor; oil separator for deposition separation of the compressed refrigerant vapor in the oil; condenser heat the compressor discharge refrigerant vapor condensing to become saturated; storage is used to store ammonia refrigerant condenser in the condensate liquid ammonia, adjusting between the condenser and evaporator liquid ammonia refrigerant supply and demand; ammonia liquid gravity separator for liquid ammonia system, the important ancillary equipment; throttle on the role of the refrigerant from the throttle control and regulation of both the refrigerant into the evaporator, the liquid flow, and the system high side and low side is divided into two parts.
2. two-stage refrigeration cycle
Two-stage ammonia refrigeration cycle is a single-stage refrigeration cycle developed on the basis, and its two-stage compression process, from the evaporator into the first low-pressure refrigerant vapor compression cylinder to the middle-class pressure, and then enter through the intermediate cooling high pressure stage cylinder, compressed into the condenser to the condensing pressure. General evaporating temperature -25 ℃ ~ -50 ℃, should be used for cooling two-stage compressor.
By the refrigeration system evaporator, two-stage compressor, oil separator, condenser, intercooler, ammonia storage device, ammonia liquid separation, the throttle valve, and other ancillary equipment and other components, with each other through the pipe connection into a closed system . Among them, the intermediate cooler refrigerant using a small amount of liquid under pressure in the middle of vaporization heat, the low-level discharge of superheated steam are cooled to reduce high levels of suction temperature, but also high-pressure liquid refrigerant to be cooled.
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