1) wind condenser heat transfer area calculation method
Cooling capacity + compressor motor power/200~250 = condenser heat transfer surface For example: (3SS1-1500 compressor) CT = 40 ℃: CE = -25 ℃ compressor capacity = 12527W + compressor motor power 11250W = 23777/230 = air condenser heat transfer surface 12527W + compressor motor power 11250W = 23777/230 = wind condenser heat transfer area of 103m2
2) water condenser heat transfer area with the ratio of wind condenser = estimated 1 to 18 (103 / 18) = 6m2
The area of the evaporator according to the compressor refrigeration (evaporating temperature ℃ × Δt relative humidity of the Huojheng coefficient of the table).
3) Refrigeration capacity calculation: = temperature difference × weight / time × specific heat × equipment maintenance agency
Example: there is a quick-freezing storage
1) library temperature -35 ℃
2) quick-freezing volume of 1T / H
3) time 2 / H within
4) quick-frozen substances (fresh fish)
5) Ambient temperature 27 ℃
6) equipment maintenance organization insulation board Calculation: 62 ℃ × 1000/2/H × 0.82 × 1.23 = 31 266 kcal / n can check the compressor evaporating temperature CT = 40 CE-40 ℃ refrigeration capacity = 31 266 kcal / n
General cold storage chiller simple selection and calculation method
(a) Cold Storage Fan matching (per cubic meter load according to W0 = 75W/m3)
1. Cold storage refrigeration unit and chiller matching according to -10 ℃ evaporation temperature calculation.
2. If V (cold storage volume) ﹤30m3, the number of times of opening the door is more frequent cold storage, such as fresh meat storage, then the multiplication coefficient A = 1.2
3. If 30m3 ≦ V﹤100 m3, the number of times of opening the door is more frequent cold storage, such as fresh meat storage, then the multiplication coefficient A = 1.1
4. If V ≧ 100 m3, the number of times of opening the door is more frequent cold storage, such as fresh meat storage, then the multiplication coefficient A = 1.0
5. = 1.0
5. If a single cold storage, the multiplication factor B = 1.1, the final cold storage chiller selection according to W = A × B × W0 (W for the chiller load)
(B) freezer fan matching (per cubic meter load according to the W0 = 70W / m3)
1. Cold storage refrigeration unit and chiller matching according to the evaporation temperature of -23 ℃ calculation
2. If V (cold storage volume) ﹤30m3, open the door more frequently cold storage, such as fresh meat storage, then multiply the coefficient A=1.2
3. If 30m3≦V﹤100 m3, open the door more frequently cold storage, such as fresh meat storage, then multiply the coefficient A=1.1
4. If V≧100 m3, the number of times of the more frequent cold storage, such as fresh meat storage, then multiply the coefficient A=1.0
5. If a single cold storage, the multiplication factor B = 1.1, the final cold storage chiller selection according to W = A × B × W0 (W for the chiller load)