Project: Chilling the brewing water for Brauhaus Tegernsee
Planning / Implementation / Main components |
Chilling of 190 hl brewing water from +16°C to +2°C in 2.5 hours / Implemented in 2010 / Witt liquid chilling unit with separator and evaporator in gravity circulation, together with an air-cooled condenser unit |
Refrigerant |
Ammonia (NH3)/secondary refrigerant: glycol |
System start-up |
2010 |
Prior to the alterations, wort chilling (4 brews per day) was carried out with the classic ice bank method. The brewery's plans to increase output to 9 brews per day necessitated a new refrigeration solution. The task comprised planning a system operating at practically constant capacity all day long. In addition, it should include scope for possibly integrating a heat pump in the system at a later point in time to supply heat to the adjoining buildings ("Braustüberl", grammar school etc.). |
|
Demands |
Planning of an indirect refrigeration system capable of chilling 190 hl brewing water from +16°C to +2°C in 2.5 hours. In addition, the cooling water consumption for the condensers should be reduced or avoided. |
Solution |
An NH3 system was installed with separator and plate evaporator as a gravity unit. The redundant concept also included two reciprocating compressors. To dispense completely with cooling water, an air-cooled condenser was chosen for refrigerant condensation. This system cools a glycol circuit to -2°C. A secondary plate heat exchanger (glycol/brewing water) with outlet temperature control then brings the brewing water to the required temperature (+2°C) which is stored in an isolated tank. |
Technical data:
Type of facility |
Indirect cooling system (ammonia/glycol) |
Refrigerant |
NH3 |
Refrigerant volume | 100 kg |
Secondary refrigerant |
Propylene glycol 32% |
Evaporation temperature | -8 °C |
Condensation temperature | +45°C |
Refrigerating capacity |
124 kW |
Main components: |
Reciprocating compressor unit |
Special features / Comments: |
The system is prepared for subsequent integration of an NH3 heat pump! |
Contact:
TH. WITT Kältemaschinenfabrik GmbH
Lukasstraße 32
52070 Aachen, Germany