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| Planning / Implementation / Main components |
YORK
Deutschland GmbH |
| Refrigerant | ammonia
(NH3) | | System
start-up | 1999 | | Ditsch,
a wholesale bakery, sells specialties including salt pretzels, pizzas and croissants.
To ensure that products are always fresh, the bakery supplies its branches with
frozen raw products, which are baked on the premises as needed. | | Demands | To
ensure consistent top quality in the freezing and chilling of the pre-formed dough.
| | Solution | The
production system uses both a low pressure (-40 ºC) and a medium pressure
refrigeration cycle (-10 ºC). The refrigerant used is ammonia. The sensitive
fermentation cooling and air conditioning is handled by an indirect refrigeration
cycle using glycol water as a secondary refrigerant. Heat is recovered using plate
heat exchangers, and can be used to heat service water. The use of ammonia makes
this refrigeration process both environmentally friendly and economical. |
|
Technical
specifications: | Type
of facility | pumped
recirculation plant | | Refrigerant | NH3 | | Refrigerant
volume | 3,800
kg | | Secondary
refrigerant | Ethylene
glycol / water | | Refrigeration
plant | | | Low-pressure
stage: 2 ammonia screw compressors | Model
SAB 202 SM, at -40 ºC/-10 ºC Refrigerating capacity 490 kW, 2,950 RPM,
drive motors 75 kW each, liquid separator 700 kW with 3 refrigerant pumps | | High-pressure
stage: 2 ammonia screw compressors | Model
SAB 163 HF, at -10 ºC/+35 ºC Refrigerating capacity 1,240 kW, 2,950
RPM, drive motors 200 kW each, discharge gas desuperheater 130 kW, liquid separator
1,600 kW with 2 refrigerant pumps | |
Condensers | 1,800
kW evaporative condenser, with section for cooling the 280 kW oil cooler glycol
/ water | | Heat
recovery | via
the 280 kW oil cooler plate heat exchangers; used as service water | | Cooling
consumers | | | Low-pressure
cycle (-40 ºC) | 180
kW cold store, continuous-flow freezer 1 x 170 kW, 1 x 120 kW, 1 x 114 kW, entry
cooler 5 x 10 kW | Medium-pressure
cycle
(-10 ºC) | a
variety of cooling units 100 kW, fermentation cooler 140 kW, 400 kW brine cooler
plate heat exchanger, indirect cooling: product cooling, ice water production
and air conditioning. | | Controls | Visualised
system on PC with BUS system for communication and data capture, microprocessor
controls and monitoring Model UNISAB for the compressor |
|
Contact:
YORK Deutschland GmbH, Flensburg
Kai Selmer
Phone: +49 (0)461-9500-0
E-mail: industriekaelte-de@yorkref.com
YORK Deutschland GmbH, Mannheim
Ralf Zimmermann
Phone: +49 (0)621-468-539
E-mail: industriekaelte-de@yorkref.com
www.york.de
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