Brewing - water
If possible automatically switch off cooling water to pumps and gearboxes when the equipment switches off
Ensure cooling water flowrate is in specification and is not easily altered
If an item is water- cooled on a “total loss” basis i.e. all coolant to drain, consider:
- a closed loop cooling water cycle (evaluate economic viability)
- control with filters and/or purge
- control recycled temperature with:
- air blast chiller
- cooling tower
- or re-using the water for CIP, pack washing or other
On replacement of cooled equipment, confirm that air cooling is not adequate
Case study: Marston's Refregeration Plant – Design Innovation
Bank's Brewery in the UK owned by Marston's was using reciprocating ammonia compressors, air cooled condensers and calcium chloride brine for secondary heat transfer. It was realised a design was possible which would use half the energy. Variable speed drives were installed on the condensers and ammonia compressors. To optimise the transfer for different heat exchanging purposes two heat exchangers are used. One cools brine for the lowest required temperatures while the second cools chilled water for fermentation control and air conditioning. A SCADA system allows for monitoring all aspects of refrigeration.
The British Brewing Industry: Thirty years of Environmental Improvement 1976-2006.
Download – The British Brewing Industry: Thirty years of Environmental Improvement 1976-2006.
Case study: New Belgium drawing water sensibly
At New Belgium a large chilled water vessel for wort cooling that only fills/cools at night to leverage cooling plant efficiencies.
Case study provided by New Belgium in January 2012