Brewing water cooling
Efficient use of BUCO ice bank silos in brewing water cooling
Our BUCO ice bank silos guarantee you competitive advantages of reducing the otherwise necessary stack tanks for storage to approx. 1/6 of the necessary size. The space saving is achieved by using the latent melting heat of crushed ice as a cold store. Furthermore, the power consumption is evened out by shifting part of the cooling capacity to the sud-free periods. A substantial increase in capacity is achieved through storage without increasing the existing ammonia volume, avoiding the need for state approval procedures.
The starting line
Some large breweries are embedded in the urban area. Capacity expansions are essentially only possible through intensification measures, i.e. limited to the existing buildings and terrain.
How was it done until now?
With single-flow cooling, the feed water, which has been pre-cooled to ice water temperature and previously softened, is heated directly in countercurrent with the boiled wort. and previously softened to ice water temperature is heated directly in countercurrent with the boiled wort. This results in an intensive heat transfer takes place, heating the water to approx. 80°C and preparing it for the next brew. The pre-cooled water is normally kept in insulated storage tanks (stack tanks). For large quantities, this requires a considerable amount of space and investment for the short brew sequences aimed for.
Technical specifications of the project
- Total capacity: 25,336 kWh/24 h
- Storage capacity: 10,000 kWh
- Operation: NH3-pumped
- Temperature of the ice water: 0.5 °C
- Tanks: Two
- Diameter: 3050 mm per tank
- Insulation: 100 mm per tank
- Height: 20.47 m per tank
- Total volume: 108 m³/tank
- Approximate ice capacity: 98.9 m³/tank
This storage takes place during batch-free periods, i.e. at weekends and at night.brewing water volumes due to high defrosting capacity and effective direct cooling.
Benefits accrued to the client as a result
- Reduction of the otherwise necessary stacking tanks for stockpiling to approx. 1/6 by installing ice bank silos. The space is saved by using the latent heat of plate ice as cold storage.
- Equalisation of the company‘s power consumption by shifting a part of the cooling capacities in the sud-free periods.
- Significant increase in capacity through storage without increasing the volume of ammonia, thus no new approval procedure required.
- Great flexibility in brewing water supply due to high melting capacities and effective direct cooling.
This storage takes place during batch-free periods, i.e. at weekends and at night. During the brewing process, cooling is only carried out directly at half the refrigeration capacity. For this reason, electricity consumption is limited or reduced and costs are saved.
Direct cooling can be used if there is an increased demand for ice water. Brewing water with a temperature of 12 to 19 °C is fed into the ice storage, cooled and used for the brewing process. When defrosting with hot gas, the ice plates loosen and fall down in large pieces. The system is ideal for optimising hot gas times and efficiency. A modified valve station has been installed. Ultrasonic probes are installed to measure the ice level.
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