Refrigerant Compressor Capacity

hi my friend TON capacity means how much energy the system can exchange from the chamber in one our. this information should be enough.

"Domestic and commercial refrigerators may be rated in kJ/s, or Btu/h of cooling. Commercial refrigerators in the US are mostly rated in tons of refrigeration, but elsewhere in kW. One ton of refrigeration capacity can freeze one short ton of water at 0 °C (32 °F) in 24 hours. Based on that: A much less common definition is: 1 tonne of refrigeration is the rate of heat removal required to freeze a metric ton (i.e., 1000 kg) of water at 0 °C in 24 hours. Based on the heat of fusion being 333.55 kJ/kg, 1 tonne of refrigeration = 13,898 kJ/h = 3.861 kW. As can be seen, 1 tonne of refrigeration is 10% larger than 1 ton of refrigeration.

Most residential air conditioning units range in capacity from about 1 to 5 tons of refrigeration."

http://en.wikipedia.org/wiki/Refrigeration

One ton of refrigeration capacity is 12,000 BTU/hr. If you are working in IP units, your load calcs will most likely be reported in units of BTU/hr.

Refrigeration compressors are never labelled with their refrigeration capacity.Typically most compressors are stamped with winding config data,elec loading and rating and in some cases their swept volume.Refrigerating capacity of compressors can be determined via their individual performance curves which will be specific to the refrigerant used,the nominal evaporating and condensing pressures to be encountered etc etc.Refrigerating capacity is one thing,you then have to design a system which overall is capable of delivering that capacity.

What I always do is copy down the model # and the serial # then call the local distributer.

they look it up and tell me its capacity.

Those numbers are like the vin # on an outomobile.

The hard part is locating the manufacturer if there is no lable on the housing.

1 "ton of cooling", a common unit in North American refrigeration and air conditioning applications, is 12,000 BTU/h. It is the amount of power needed to melt one short ton of ice in 24 hours, and is approximately 3.51 kW.

TON is a measurment of cooling capacity of a Refrigerator, air cooler or any AC system. One TON = 3.5 kW.

The compressor capacity is given in kW rating which normally is its motor rating.

Anant.

Jewel-

As shown, below, the capacity of the system, or "tons", is determined by how much refrigerant is moved through the system in conjunction with how much heat (BTU's/lb of refrigerant) is absorbed by the evaporator and how much heat (BTU's/lb of refrigerant) is removed by the condenser (include the heat of compression).

Each type of refrigerant has a specific heat used in the calculation to find the BTU/lb capacity to absorb and remove heat. Since the compressor can move any type of super heated vapor, the capacity or tonnage depends on the type of refrigerant.

To determine your compressor's capacity, in tons, obtain the compressor manufacturer's specifications of the volumetric efficiency and volume of the cylinder/piston displacement. Determine your refrigerant's capacity to absorb BTU's/lb at condensing and evaporating pressures & temperatures at full load. The rate at which your compressor will move the refrigerant vapor in "pounds per hour" will determine the BTU's/hour or "tons" of the system.

This is a "simple" explanation of the refrigeration process. It is far more complicated than this when we bring into the explanation of latent heat, sensible heat, COP and other efficiencies.

The diagram, below, is courtesy of RSES (Refrigeration Service Engineers Society).

FIGURE 2F43 The Compression Refrigeration Cycle