Need advice from heat exchanger experts
Need advice from heat exchanger experts
(OP)
I have been trying to confirm the definition of effectiveness for an air-to-air intercooler installed between a turbocharger compressor discharge and an engine intake manifold. I looked around the internet and found a number of answers (some contradictory - no surprise), and I finally went to a Turbo-by-Garrett web site.
https://www.turbobygarrett.com/turbobygarrett/inte...
I thought these guys were the experts, but I am puzzled by what is said because it does not seem right to me. Any advice? Are these guys correct?
1. They use the word effectiveness and efficiency interchangeably for a heat exchanger. This does not agree with what I think I learned in thermodynamics class many years ago. Have the definitions loosened to the point were it is OK to consider effectiveness and efficiency as the same thing?
2. In the linked explanation, the effectiveness is defined as a ratio between the delta T (hot side) across the intercooler against the compressor discharge temperature. (in degrees F, not absolute temperature). I remember heat exchanger effectiveness (hot side) as being the ratio between delta T (hot side - that is, the hot air being cooled) against the difference between the hot side temperature going into the heat exchanger and the cold side sink temperature. Or maybe something like Eff = (Tin (charge air hot side) - Tout (charge air cooled side)) / (Tin (charge air hot side) - Tcold (cooling air inlet side)).
Any advice or comments from those professionals who work in this field would be appreciate. Thanks.
https://www.turbobygarrett.com/turbobygarrett/inte...
I thought these guys were the experts, but I am puzzled by what is said because it does not seem right to me. Any advice? Are these guys correct?
1. They use the word effectiveness and efficiency interchangeably for a heat exchanger. This does not agree with what I think I learned in thermodynamics class many years ago. Have the definitions loosened to the point were it is OK to consider effectiveness and efficiency as the same thing?
2. In the linked explanation, the effectiveness is defined as a ratio between the delta T (hot side) across the intercooler against the compressor discharge temperature. (in degrees F, not absolute temperature). I remember heat exchanger effectiveness (hot side) as being the ratio between delta T (hot side - that is, the hot air being cooled) against the difference between the hot side temperature going into the heat exchanger and the cold side sink temperature. Or maybe something like Eff = (Tin (charge air hot side) - Tout (charge air cooled side)) / (Tin (charge air hot side) - Tcold (cooling air inlet side)).
Any advice or comments from those professionals who work in this field would be appreciate. Thanks.





RE: Need advice from heat exchanger experts
Disclaimer - not my area, but I know a bit of Physics.
RE: Need advice from heat exchanger experts
RE: Need advice from heat exchanger experts
With water cooled intercooler HX performance matters because your water is more dear.
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P.E. Metallurgy, Plymouth Tube
RE: Need advice from heat exchanger experts
je suis charlie
RE: Need advice from heat exchanger experts
I particularly liked the part about the inclusion of ice as a coolant. Pumping ice will be an engineering challenge!
RE: Need advice from heat exchanger experts