In order to protect the ozone layer and restrain the global climate change,researches and studies of green refrigerants have widely developed in domestic and foreign. Dongyue-Tsinghua refrigerants in Shandong Dongyue Chem. Co. Ltd are series of green refrigerants developed previously and applied widely.They have the following characteristics: environmental friendly, similar thermodynamic properties with the substituted refrigerants, safety, drop-in, energy saving and low substitution expense, etc.
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