Results 1 to 50 of 896
Thread: AWHP superheat & sub-cooling
Threaded View
-
15-07-2009, 02:58 PM #11
Re: AWHP superheat & sub-cooling
This is true, for the condenser heat-balance, as we saw in Drew's swimming pool heat-pump.
The best way to actually test the real effect of these changes is to measure the heat-up time for water cycling around a heat-pump loop. In practice, I've actually found little noticeable difference in tank heat-up time using slower, or faster flows.
What happens is that the lower temperature of the entering water can be set to maintain the same log-mean-temp-difference across the condenser, so that the condensing temp is not actually affected.
In Drew's case, my test was set a Tc,sat=50'C, then the water flow was closed off - the Tc,sat rose to compensate. This is not a realistic test for circulating water, though. What typically happens is that at a similar Tc,sat~70'C the whole heating cycle finishes - with less passes through the heat-pump circuit, but more dTw in each pass.Engineering Specialist - Cuprobraze, Nocolok, CD Technology
Rarefied Technologies ( SE Asia )
Similar Threads
-
9 superheat & subcooling scenarios
By nike123 in forum FundamentalsReplies: 39Last Post: 19-07-2011, 03:16 AM -
Superheat and Subcooling
By Chunk in forum FundamentalsReplies: 42Last Post: 15-01-2011, 01:24 AM -
Some information on the aplication of suction gas/liquid line heat exchangers
By SteinarN in forum FundamentalsReplies: 5Last Post: 14-09-2009, 07:33 AM -
Low superheat and sucooling
By jayaeros in forum Trouble ShootingReplies: 23Last Post: 05-07-2009, 06:21 AM -
Compressor loading, cooling, and range of operation.
By Air duster in forum FundamentalsReplies: 10Last Post: 02-04-2008, 08:39 AM