Type 72 --- ABSFLSIM
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NUMERICAL SIMULATION OF AN ABSORPTION MACHINE IN PART-LOAD REGIME
The main practical problem that faces a user is to determine which control
system should be applied in order to meet at best the cooling demand.
Two control systems are possible in an absorption chiller in order to
obtain the given evaporator exhaust water temperature.
1) The modulating control system consists in adjusting the pressure of
steam supplied to the generator; when the cooling demand is reached, the
chiller operates continuously with the same steam pressure.
2)For low cooling demand, the ON-OFF controll systems simply starts and
stops the chiller in order to satisfy the cooling demand. This second
control system is referred to as a "cyclic" operating mode and described
by a quasi static model: it is assumed that the cyclic operation can
be represented by a linear combination of two steady state regimes.
Moreover, the cyclic losses are not accounted for.
Routine ABSPLISM is based on the same conceptual scheme and the same
refridgerant cycle as in full-load regime.
Input, Output and Parameter descriptions are in the *.for file. For More
details, see the HVAC1KIT manual.
For a complete description of the routine, reference the HVAC1KIT manual,
prepared by;
Jean Pascal BOURDOUXHE and Marc GRODENT, Research Assistants.
Jean LEBRUN, Principle Investigator.