Application safety analysis of civil air conditioning chilled water (heat pump) units with ammonia refrigerant

 Ammonia is an excellent refrigerant with high efficiency, environmental protection and low cost. The chilled water (heat pump) unit with ammonia refrigerant has been developed and used in civil buildings in foreign countries. Although GB 50736-2012 Design code for heating ventilation and air conditioning of civil buildings has allowed ammonia chilled water (heat pump) units to be used in civil building air conditioning systems, there are no domestic manufacturers currently producing ammonia chilled water (heat pump) units for civil buildings, mainly due to some concerns about the toxicity and flammability of ammonia. Through the comparison of relevant national laws and standards, and the analysis of the technical and structural characteristics of ammonia chilled water (heat pump) units and the general leakage accident tree of ammonia-containing equipment, concludes that the civil air conditioning chilled water (heat pump) unit with ammonia refrigerant can be safely applied to the civil field by the analogous evaluation method, which provides support for the promotion and application of the ammonia refrigerator in the civil field.