Slaughterhouse / Sweden

Planning / Implementation / Main components

Ingemar Johansson Ingeniörbyrå AB / Alfa Laval AB

Refrigerant

Ammonia (NH₃)

System start-up

1992

A Swedish slaughterhouse operates numerous refrigeration and freezing rooms for producing and storing its sausage and meat products. Its ammonia-based refrigeration plant was built by Alfa Laval.

Demands

The slaughterhouse was looking for an efficient, environmentally friendly solution for its various refrigeration and deep-freezing needs.

Solution

The engineering firm designed an economical ammonia system with a refrigeration output of 4,000 kW. As the ammonia cools the production and storage rooms, a temperature of approx. 70°C is generated on the heat producing side. This waste heat is used by desuperheaters, liquefiers and heat pumps to warm up heating-circuit and service water up to 67°C in several steps. The 800-kW heat pumps are connected directly to the refrigeration cycle with ammonia plate heat exchangers, thereby additionally enhancing the system’s efficiency.

Type of facility

Central system

Refrigerant

NH3

Refrigerant volume

35 t

Secondary refrigerant

Temper

Refrigerating capacity

4,000 kW

Refrigerant temperature

-10 ºC

Main components

Desuperheaters, heat pumps, liquefiers

Special features / Comments

By putting the waste heat to use, the slaughterhouse can save roughly 1,400 m³ of heating oil a year.