|
Hello everyone, for my thesis i try to model a trigeneration system
(power, heat, cold) including various types of chillers. One of these chillers is
Type 717 (Steam-Fired Double-Effect Absorption Chiller) of the TESS Cogen
library. In my system I have a sum-up-cooling-demand of various loads. The
chilled water setpoint temperature is 6°C and it is assumed that the loads
return the chilled water at 12°C. (deltaT=const.). So a changing cooling demand
means a changing mass flow rate of chilled water. Now my problem begins: I used this mass flow rate as
the chilled water mass flow rate input for the chiller. I expected that the
chiller would, when working at part load, give me a changing needed steam flow
rate as an output. But it does not, the steam flow remains constant. Only the
chilled water set point temperature and the temperature of the entering cooling
water have an impact on the needed steam flow rate. Is that correct? I’m
not too familiar with Absorption chillers… I read in the manual to understand the types
calculations but got confused, because the manual talkes about 4 external files
but the type just needs 3… Regards, Martin |