Physics Help Forum Coefficient of performance (COP) of this triangular cycle
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 Oct 10th 2018, 04:37 AM #1 Junior Member     Join Date: Jul 2018 Posts: 6 Coefficient of performance (COP) of this triangular cycle I have this problem: (it is not triangular really, just 3 steps in a closed system) Here's my solution attempt: NOTE: Evolution 2 to 3 is really an isothermic process, but in the diagram shows as an politropic process. So... But it isn't giving me logical values of COP when I compare it with a reverse cycle of Carnot. Questions: *How could I calculate the COP and COPmax of this cycle? Not sure how to arrange heats and work on COPs formula for a triangular cycle like this one. *Can my COP be greater of that of a comparable Carnot's cycle? Last edited by Screwed; Oct 10th 2018 at 08:55 AM.
 Oct 10th 2018, 08:05 AM #2 Member     Join Date: Sep 2014 Location: Brasília, DF - Brazil Posts: 32 Why you dH is 0 in 2-3?? Is it an open or closed system? __________________ Work on: General thermal systems Cryogenics Micro-drop fluid mechanics Last edited by mscfd; Oct 10th 2018 at 08:23 AM.
Oct 10th 2018, 08:57 AM   #3
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Join Date: Jul 2018
Posts: 6
 Originally Posted by mscfd Why you dH is 0 in 2-3?? Is it an open or closed system?
Closed system.
Because enthalpy depends only on temperature for ideal Gases.

 Tags coefficient, cop, cycle, performance, triangular

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