氨(NH₃)
氨（NH3.)是一种众所周知的制冷剂，特别适用于大型工业工厂，在不影响安全的情况下充分利用其优点。
氨以其有利的热力学性质而闻名。在广泛的应用中，它的性能优于合成制冷剂。然而，它有一些缺点，迄今为止阻止了氨的商业应用，如材料兼容性，毒性和可燃性。
案例研究
Industrial refrigeration systems predominantly use natural refrigerants, primarily ammonia and more recently CO2 Energy efficiency and the effective operation of those systems are the key parameters for operators of the plants The focus of the white paper is the comparisons of hot gas defrost strategy control methods, both on the hot gas side as well as on the condensate drain
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