CRISTOPIA NEWS

The Newsletter of Cristopia Energy Systems

Number : 11

June 1999

 

Huge Benefits at a Major Brewery : 'HARP' (Guinness)
STL - N10 - 200

 

     A large, Dundalk lager brewery (Guinness) with an annual throughput of approximately 1,000,000 hectolitres per year was the site of the first major sub-zero eutectic thermal store.
With the exception of a low temperature circuits (@ - 10°C) the vast majority of cooling circuits operate at temperatures of - 4°C and - 7°C serving fermentation vessels and crash cooler etc...

     The site's peak cooling demand is around 3,750 kW and loads vary on a 3-hour cycle as shown to the right.

     With the support of Thermie, this project was designated as a demonstration project.
A CRISTOPIA eutectic thermal store, with a fusion temperature of - 10°C, is capable of producing chilled fluid at - 7°C and - 4°C.		  
     Sizing thermal storage system to store 10,000 kWh of refrigeration meant that all peaks above 2,000 kW could be satisfied by energy stored during off-peak periods. The peak lopping achieved by the thermal store is illustrated by the un-shaded area above.
     The consulting engineers report to Thermie stated that "the incorporation of the eutectic thermal store into the existing system was a total success."

 

Results of Site Monitoring

     Furthermore, the following benefits were confirmed as a result of the site monitoring for the one year period either side of installation :

  • Refrigeration energy costs reduced by £ 106,800p.a.*
  • Refrigeration plant peak capacity demand reduced by 1,750kW
  • Site electrical maximum demand reduced by 1,084kWelec
  • 1,000,000kWhelec shifted to off-peak tariff
  • Refrigeration electrical consumption reduced from 4.036 to 3.075 kWh per hectolitre throughput
  • Site electrical utilisation improved from 42% to 57%

 

Cristopia Energy Systems : 78, chemin du Moulin de la Clue - Quartier Cayrègues - 06140 Vence - France
Tel : 33 (0) 4 93 58 4000 - Fax : 33 (0) 4 93 24 29 38