Why A.C. capacity given in Ton.
Ex. - 1.5 Ton
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Answer Posted / mahesh-lanco
1 Ton capacity means---The cooling produced by melting of 1
ton of ice in a day is
taken as unit of refrigeration (in tons). Now unit of
refrigeration used in S.I. System is KW.
1 ton of refrigeration
= mass of ice x latent heat of ice / 24 hrs
= 900 kg x 335 KJ/Kg ( one short ton = 900 kgs )
------------------
24 x 3600 secs
= 3.4895 KJ/Sec
say 3.5 KJ / Sec = 3.5 KW
that is 1 ton of refrigeration = 3.5 KW
The amount of the heat required to convert 1 ton (2000
pounds)of ice in to water within 24 hours. The initial
temperature of water is 0 deg C.
Latent heat of ice= 144 BTU
1 TR= 144 X 2000
= 288000 BTU/24
For 1 hour
We can divid by 24 So 288000/24=12000BTU
1TR=12000BTU/Hr
=3024 K Cal/Hr
= 12600 K Jul/Hr
= 3.52 HW OR K Jul/Sec
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