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SEMI HERMETIC AND HERMETIC AMMONIA COMPRESSOR PACKAGES

机译:半密封和密封氨压缩机组

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Not only environmental concerns that make ammonia, one of the oldest refrigerants in industrial use so attractive among old and new users, its excellent thermal properties also enables design and installation of systems with high COPs as compared to HFCs. The main disadvantage of ammonia, however, is toxicity, smell and flammability. For this reason, most ammonia refrigeration systems are of indirect type using secondary refrigerants.There is, therefore, a need for systems with reduced refrigerant charge in order to increase safety and reliability of ammonia refrigeration systems. Miscible oil, compact heat exchangers, electronic expansion valves and semi hermetic compressors have been developed and as a result systems with drastically reduced refrigerant charge have been introduced into the market.This paper reports on the development of semi hermetic ammonia compressor packages coupled with interior permanent magnet motors.
机译:氨不仅是工业上最古老的制冷剂之一,对环境的关注不仅使新老用户都对它产生了吸引力,而且其出色的热性能还使设计和安装与HFC相比具有较高COP的系统成为可能。然而,氨的主要缺点是毒性,气味和易燃性。因此,大多数氨制冷系统是使用二次制冷剂的间接制冷系统。 因此,需要减少制冷剂充注量的系统,以提高氨制冷系统的安全性和可靠性。已经开发出混溶油,紧凑型热交换器,电子膨胀阀和半封闭式压缩机,结果,已将制冷剂充注量大大减少的系统引入了市场。 本文报道了半封闭式氨气压缩机组与内部永磁电动机结合在一起的发展情况。

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