cold room storage refrigeration RT
A ton of refrigeration (TR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment. It is defined as the rate of heat transfer that results in the melting of 1 short ton (2,000 lb; 907 kg) of pure iceat 0 °C (32 °F) in 24 hours.
A refrigeration ton is approximately equivalent to 12,000 BTU/h or 3.5 kW. Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in “tons” (of refrigeration). Many manufacturers also specify capacity in BTU/h, especially when specifying the performance of smaller equipment.
HP
The calculation of the horsepower (HP) horsepower cooling capacity is calculated in terms of kcal or tile (W). In general, 1PH=2000 kcal, and the international unit calculates to multiply by 1.16. So 1PH = 2324W.
In daily life, 2500W is used as the standard 1PH.
23 represents a small one; cooling area 10-14 square meters.
26 stands for 1 horse; the cooling area is 14-18 square meters.
32 stands for 1.5 horses; cooling area 18-22 square meters.
35 represents 1.5 horses; cooling area 22-25 square meters.
1P–2200-2600W; applicable area 12-15 square meters.
1.5P–3000-3800W; applicable area is about 18 square meters.
2P–4000-5500W; applicable area is about 28 square meters.
Power refers to the work done by an object in a unit of time, that is, the power is the physical quantity that describes the speed of work. The amount of work is certain, and the shorter the time, the greater the power value. The formula for power is power = work/time. The power used to describe the speed of work, how much work done per unit of time is called power.
unit conversion
1 US ton of cold = 3024 kcal/h (kcal/h) = 3.517 kW (kW)
1 Japanese cold ton = 3320 kcal/h (kcal/h) = 3.861 kilowatts (kW)
1 hp (or 1 horsepower) = 735.5 watts (W) = 0.7355 kW (kW)
1 kcal/h (kcal/h)=1.163 watts (W)
Celsius °C = (Fahrenheit °F-32) 5/9
1HP = 2.5kW = 735.5W: Note: 2.5kW corresponds to cooling capacity, while 735.5W corresponds to electrical power;
Common conversion formulas:
1 kJ (kJ) = 0.239 kcal (kcal)
1kcal = 4.19kJ (kilojoules)
1kcal=3.969Btu
1Btu=0.252kcal
1kcal=427kg.m
1kW=860kcal/h
1 U.S. cold tons = 3024 kcal/h = 3.51 kW
1 Japan cold tons = 3320kcal/h = 3.86kW
For example, a 40kW air conditioner has a cooling capacity of 40*860=34,400 kcal.
Civil air-conditioning likes to (H) P as a unit, 1 (H) P = 0.735kW, general energy efficiency ratio of 3.2, and the cooling capacity of 2352W, converted into a large card is about 2022 kcal.
It can be said that the 1(H)P air-conditioning capacity is 2000 kcal.
0C cold room storage matching evaporator:
Each cubic meter load is calculated as W0=75W/m3.
1. If the V (cold storage volume) is less than 30 m3, and the number of times the door is opened frequently, such as fresh meat, the multiplier coefficient is A=1.2;
2, if 30m3 ≤ V <100m3, open more frequent cold storage, such as fresh meat, then the multiplier coefficient A = 1.1;
3, if V ≥ 100m3, open more frequent cold storage, such as fresh meat, then the multiplier coefficient A = 1.0;
4, if a single cold storage, then the multiplier coefficient B = 1.1 final cold storage cooler matching according to W = A * B * W0 (W is the cooling fan load);
5, cold storage refrigeration unit and cooling fan match according to -10 degree evaporation temperature calculation.
The above calculations are reference values and the calculations are based on the cold storage load calculation table.
-18C cold room storage matching evaporator:
The load per cubic meter is calculated as W0=70W/m3.
1. If the V (cold storage volume) is less than 30 m3, and the number of times the door is opened frequently, such as fresh meat, the multiplier coefficient is A=1.2;
2, if 30m3 ≤ V <100m3, open more frequent cold storage, such as fresh meat, then the multiplier coefficient A = 1.1;
3, if V ≥ 100m3, open more frequent cold storage, such as fresh meat, then the multiplier coefficient A = 1.0;
4, if a single freezer, then the multiplier coefficient B = 1.1 final cold storage cooler matching according to W = A * B * W0 (W is the cooling fan load)
5. When the cold storage unit shares the refrigeration unit with the low temperature cabinet, the unit and the cooling unit are matched by the -35 degree evaporation temperature.
Processing Room Cold storage matching cooling fan:
The load per cubic meter is calculated as W0=110W/m3.
1, if V (volume between processing) <50m3, then the multiplier coefficient A = 1.1;
2, if V ≥ 50m3, then the multiplier coefficient A = 1.0 final cold storage cooler matching according to W = A * W0 (W is the cooling fan load);
3. When the processing room shares the refrigeration unit with the medium temperature cabinet, the unit and the cooling fan are matched according to the -10oC evaporation temperature. When the processing room is separated from the medium temperature cabinet, the cold storage unit and the cooling fan are matched according to the 0oC evaporation temperature. The above calculations are reference values and the calculations are based on the cold storage load calculation table.