Nestle's coffee production
Planning / Implementation / Main components |
Star Refrigeration Ltd. |
Refrigerant |
ammonia (NH3) / secondary refrigerant carbon dioxide (CO2) |
System start-up |
2000/2001 |
Nestle UK has been producing chocolate since 1913, and more recently coffee, including the world famous Nescafe brand, in Hayes, Middlesex. In order to comply with environmental standards the refrigeration plant was to be upgraded. |
|
Demands |
The freeze drying line was installed in the 1960's and used the greenhouse gas R22. Additional challenges were posed by the existing production lines and the traditional style of the art deco building. |
Solution |
A large, low temperature industrial refrigeration system has been commissioned using a cascade between ammonia and carbon dioxide as the working fluids in the plant. |
Technical data:
Type of facility |
NH3 / CO2 cascade refrigeration plant |
Refrigerant |
NH3 |
Refrigerant volume |
5,000 kg |
Refrigerant |
CO2 |
Refrigerant volume |
20,000 kg |
No. of refrigeration compressors |
four NH3, four CO2 |
Refrigerant temperature |
2 low temperature levels at -48 °C and -54 °C, small side load at -16 °C |
Refrigerating capacity |
2,400 kW |
Main components |
CO2 pump sets, condenser, receiver, Ammonia plant |
Special features / Comments |
The pipework is all stainless steel which gives some benefits in corrosion resistance but more important ensures the high strength of the pipes at low temperatures. |
Contact:
Star Refrigeration Ltd.
Andy Pearson
Thornliebank Industrial Estate
Glasgow G46 8JW
United Kingdom
Phone: +44 (0)141 638 7916
Fax: +44 (0)141 638 8111
E-mail: apearson@star-ref.co.uk