R02 -- Ammonia Refrigeration Systems (I-P)

Ammonia is the refrigerant of choice for many industrial refrigeration systems. Custom-engineered ammonia (R-717) refrigeration systems often have design conditions that span a wide range of evaporating and condensing temperatures. Examples are (1) a food freezing plant operating from +50 to –50°F (10 to –45°C); (2) a candy storage requiring 60°F (15°C) db with precise humidity control; (3) a beef chill room at 28 to 30°F (–2 to –1°C) with high humidity; (4) a distribution warehouse requiring multiple temperatures for storing ice cream, frozen food, meat, and produce and for docks; and (5) a chemical process requiring multiple temperatures ranging from +60 to –60°F (15 to –50°C). EQUIPMENT Compressors Condensers Evaporators Evaporator Piping Vessels Piping Controls SYSTEMS Single-Stage Systems Economized Systems Multistage Systems Liquid Recirculation Systems Safety Considerations