Terry
Line Up and Wait
Hi All:
I use the following formula supplied by the EPA to figure the receiver capacity of a refrigeration system.
It is basically a long cylinder that holds refrigerant. It is:
Circumference X Circumference X Length divided by 21721.
Let's say a 13" diameter tank. 3.14 X 13 = 40.82 circumference
71" long
40.82 X 40.82 X 71" = 118305.34 / 21721 = 5.45 Receiver volume
Then 5.45 X 1.5 X 76.77 (Refrigerant density of R22, from chart) = 627.6 Refrigerant capacity in pounds.
1. What is the number 21721 for?
2. When I multiply 5.45 X 1.5, what is the 1.5?
No one seems to know. Not even the EPA.
Hope some of you engineers will know.
Thanks;
Terry
I use the following formula supplied by the EPA to figure the receiver capacity of a refrigeration system.
It is basically a long cylinder that holds refrigerant. It is:
Circumference X Circumference X Length divided by 21721.
Let's say a 13" diameter tank. 3.14 X 13 = 40.82 circumference
71" long
40.82 X 40.82 X 71" = 118305.34 / 21721 = 5.45 Receiver volume
Then 5.45 X 1.5 X 76.77 (Refrigerant density of R22, from chart) = 627.6 Refrigerant capacity in pounds.
1. What is the number 21721 for?
2. When I multiply 5.45 X 1.5, what is the 1.5?
No one seems to know. Not even the EPA.
Hope some of you engineers will know.
Thanks;
Terry