refrigeration + compressor motor power/200~250 = condenser heat transfer surface for example: (3SS1-1500 compressor) CT = 40 ℃: CE = -25 ℃ compressor refrigeration = 12527W + compressor motor power 11250W = 23777/230 = wind condenser heat transfer area 103m2
2) water condenser heat transfer area and wind condenser ratio = estimated 1 to 18 (103 / 18) = 6m2
Evaporator area according to the compressor refrigeration capacity (evaporating temperature ℃ × Δt relative humidity of the Hugh coefficient of the table).
Calculation of cold storage evaporator matching
I. Matching of cold storage chiller:
Cold storage per cubic meter load is calculated according to W0=75W/m?
1 If V (cold storage volume) <30m?, the number of times the door is opened more frequently cold storage, such as fresh meat storage, then multiply the coefficient A = 1.2;
2 If 30m? ≤ V <100m?, the number of times the door is opened more frequently cold storage, such as fresh meat storage, then multiply the coefficient A = 1.1;
3 If V ≥ 100m?, the number of times the door is opened more often cold storage, such as fresh meat, then multiply the coefficient A = 1.0;
3 If V ≥ 100m? Multiplying factor A = 1.0;
4 If a single cold storage, then multiply the coefficient B = 1.1 The final cold storage chiller selection according to W = A * B * W0 (W for the chiller load);
5 cold storage refrigeration unit and chiller matching -10?C evaporative temperature calculation.
Second, the freezer chiller matching:
Each cubic meter load is calculated according to W0 = 70W/m?
1 If V (cold storage volume) <30m?, the number of times the door is more frequent cold storage, such as fresh meat storage, then multiply the coefficient A = 1.2;
2 If 30m? ≤ V <100m?, the number of times the door is opened more frequently in the cold storage, such as fresh meat, then multiply the coefficient A = 1.1;
3 If V ≥ 100m?, the number of times the door is opened more frequently in the cold storage, such as fresh meat, then multiply the coefficient A = 1.0;
3 If V ≥ 100m? Multiplying factor A = 1.0;
4 If a single freezer, then multiply the coefficient B = 1.1 The final cold storage chiller selection according to W = A * B * W0 (W is the load of the chiller)
5 When the cold storage and low-temperature cabinets *** with a refrigeration unit, the unit and the chiller match the evaporative temperature calculation at -35?C. When the cold storage and low-temperature cabinets are separated, the unit and the chiller match the evaporative temperature calculation at -35?C. The chiller will be used in the cold storage. When the cold storage and low-temperature cabinet separate, cold storage refrigeration unit and chiller matching by -30?C evaporative temperature calculation.
Third, the cold storage processing room chiller matching:
Each cubic meter load is calculated according to W0 = 110W/m?
1 If V (processing room volume) <50m?, then multiply the coefficient A = 1.1;
2 If V ≥ 50m?, then multiply the coefficient A = 1.0 The final cold storage chiller selection according to the W = A * W0 (W is the load of the chiller);
3 When the processing room and the medium temperature cabinet **** with a refrigeration unit, the unit and chiller matching is calculated according to the evaporative temperature of -10?
When the processing room and the medium temperature cabinet *** with refrigeration unit, the unit and chiller matching by -10?C evaporating temperature calculation.
When the processing room is separated from the medium temperature cabinet, the cold storage unit and chiller matching is calculated according to 0?C evaporating temperature. The above calculations are for reference, the exact calculation is based on the cold storage load calculation table.