Case studies

Ammonia Spray Chiller / Silver Bay Seafoods, Alaska

Planning / Implementation: Isotherm Inc., Manufacturer of Heat Transfer Equipment for Refrigeration in Texas
Refrigerant: Ammonia (NH3)
System start-up: February 2010

Isotherm Inc., a Texas based manufacturer of RSW evaporators, condensers and systems supplied a custom designed Ammonia Spray Evaporator to Silver Bay Seafoods, a herring processor in Alaska.


The objective was to ensure environment-friendly and efficient refrigeration.

Technical specifications:

The design was based on a capacity of 2200 kW with ammonia suction at -28°C and sodium chloride brine flow rate of 795 m³/h with outlet temperature of -20°C.

Technical data:
Type of facility: Custom designed Ammonia Spray Evaporator
Refrigerant: NH3
Refrigerant volume: The total ammonia charge for the evaporator is less than 250 kg.
Refrigerating capacity: 750-800 tons per day of herring refrigeration
Main components:  
Special features / Comments: Processing of 750 to 800 tons per day means nearly about twice as the average amount that was realized the year before

Isotherm, Inc.
Mr. Zahid Ayub (President)
7401 Commercial Boulevard
Arlington, TX 76001
Phone : +1 817 472 9922
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