what is tr and gpm in air conditioning sytem give the fuul detail?

Answer 1

1.TR=Ton of Refrigeration.

(The cooling capacity of older refrigeration units is often indicated in "tons of refrigeration". A ton of refrigeration represents the heat energy absorbed when a ton (2000lbs.) of ice melts during a 24-hour day. The ice assumed to be solid as 32 degrees F. (0 degrees C.) initially and becomes water at 32 degrees F. (0 degrees C.). The energy absorbed by the ice is the latent heat of ice times the total weight.
Today, refrigeration units are often rated in Btu/hr. instead of tons. The Btu equivalent of one ton of refrigeration is easy to calculate. Multiply the weight of one ton of ice (2000lbs.) by the latent heat of fusion (melting) of ice (144 Btu/lb.). Then divide by 24 hours to obtain Btu/hr.

One ton of refrigeration effect= 2000 X 144/24
One ton of refrigeration effect= 288,000 Btu/24 hours
One ton of refrigeration effect= 12,000 Btu/hr.)

A 12,000 Btu/hr cooling capacity is equivalent to one ton of refrigeration.

2.gpm=gallon per minute .It is a unit of capacity/volume.
1 US gallon per minute = 6.30901967 × 10-5 m3 / s
(Abbreviation: gpm

Quantity:volume_flow_rate
Metric (SI) Equivalents:
3.785411784 liters / minute
63.0901964 centimeters^3 / second

Metric (SI) Dimensions:
length^3 × time^-1

Description in Terms of Other Units and Constants:
gallon / minute

Note:
The metric (SI) equivalents above were calculated from exact values using double-precision arithmetic.)

Flow is measured in GPM , WHETHER it is a flow through a condenser or the flow through a chiller which is meant for cooling /to give refrigerant effect.

Answer 2

TR means Tons of Refrigeration, refers Capacity,
GPM means gallon per minute, refers Flow

You can find a Chiller Capacity by knowing water flow and temperature difference between inlet and outlet.

Capacity (KW)=Flow(L/s)* Specific Heat of Water (4.186 KJ/Kg/'C)*Delta T ('C)

1TR=3.516KW

Answer 3

tr - ton rating
gpm - gallons per minute