Type 80 - SCRECHIL 
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NUMERICAL SIMULATION IF A  TWIN-SCREW CHILLER IN PART LOAD REGIME

Routine SCRECHIL deals with the part-load operation of a screw chiller 
equipped with a slide valve. Its purpose is to indicate the chiller 
operating mode in order to reach a set point on the evaporator exhaust
water temperature.

There are two main ways to reach the set point: 
1) By cycling between ON and OFF regimes. 
2) by modulating the cooling capacity by means of the slide valve. 

The ON - OFF regime is simulated by a simple linear combination of two 
steady-state regimes. The chiller is also assumed to work with only 
one compressor and the cyclic losses associated with the ON - Off regime
are not considered in this model. 

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.