[TRNSYS-users] Type 31 with high mass flows

[apeman279-trnsys at yahoo.de]

Hi,

does the Type 31 pipe have got any problems with
segments (mass flow times the timestep) that are
bigger than the pipe itself.?
I study heat losses of pipes that are through-flown by
different mass flows from a DHW load profile (always
the same).
I tested 1, 7 and 14 interconected pipes having all
the same total volume and length with different time
steps (60s, 20s, 6s). That leads to a variety of
maximum segment masses and I get differences in heat
losses of up to 7 per cent.
I know that TRNSYS 16 writes a warning when the mass
flow is bigger than the capacity of the pipe during
one timestep but I have no closed loop, just a type 6
and the pipe.

Jens Apel
FHTW Berlin, Germany


	

	
		
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