[TRNSYS-users] Problem of convergence in modelling an heat pump in off state

[David Bradley]

Chun Kwon,
   Each of the components has to set its outputs to something 
appropriate when that component is off. What is usually done is that 
when there is no flow into the component, its outlet temperature is 
set to the inlet temperature. This of course assumes that the flow 
rate and temperature of fluid entering the component are both inputs 
to the model. You can look at the source code for Type6 to see how 
that component handles the situation when there is either no flow 
into the heater or when the heater control signal is set to OFF.
Cheers,
  David


At 00:50 2/14/2008, h8304506 at hkusua.hku.hk wrote:
>Dear Trnsys users.
>
>I try to simulate a heat pump system from the basic component level
>(compressor, condenser coil, expansion valve and evaporator coil).  I
>have created separate proformas for each component, and linked them up
>in a closed loop.  However, I get one problem when writing the source
>codes.  How can I define the output of each component when the system
>is off (say by using a scheduler or temperature controller), but still
>maintain convergence in the closed loop?  Your reply is highly
>appreciated.
>
>Best Regards
>LEE, Chun Kwong
>PhD student
>Department of Mechanical Engineering
>University of Hong Kong
>
>
>
>
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>TRNSYS-users at engr.wisc.edu
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