Specifications
Data
Comments
Temperatures
Condensation temperature
R290
25°C (8.7 bar)
System currently operating at 27°C
Evaporator temperature
R290
-14°C (3.0 bar)
Condensation temperature
R744
-10°C (26.5 bar)
Evaporator temperature
R744
-32°C (13.4 bar)
Brine temperature (inlet)
PG
-10°C
Brine temperature (return)
PG
-7°C
Refrigeration effect
(dimensioning)
Refrigeration load (brine)
21 kW
Brine system with six heat
exchangers
Freezing load (CO2)
10 kW
Direct system with R744, 4 freezing
sites
Propane system
34.6 kW
Compressors (current)
R290: 2 Bitzers
78.72 m3/h
4T-8.2 mineral oil
R744: 1 Bitzer
4.06 m3/h / 8.3 kW
X2KC-05.2 (Y), ester oil
Part load operation
R290: 2 Bitzers (4 cyl.)
2/4 cyl.
Capacity: 25% - 100% at four levels
R744: 1 Bitzer (2 cyl.)
1: VLT (30-60 Hz)
Capacity: 60% - 120% (continuously)
Charge
Propane system
10 kg
CO2 system
6 kg
Propylene glycol
140 kg
Table 2: System dimensioning details
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