In the figure, COP is increased after the controller is turned on and system goes to another steady-state without severely unstable behavior. Fig. 5(b) shows the response of cooling capacity in the same experiment with that of Fig. 5(a). In both figures, the controlled parameters do not diverge or behave unstably. The increase of COP can be explained by ratio of the increments of cooling capacity and compressor power consumption. As stated, the cooling capacity of the system is maintained at constant value 5 kW but 'specific' cooling capacity of refrigerant varies according to change of pressure, temperature and mass flow rate. In the case of Fig. 5, the expansion valve opening changes from 11.6% to some controlled value and finally the opening was reduced to about 10.95% (Fig. 5(d)) and gas-cooler pressure was upraised (Fig. 6).On COP will increase after opening and control system will be fixed. Without radical behaviour, unstable image 5 (b) shows a cool response capacity in the same trial of 5 images (), both in numbers, and control parameters are different, or make a. Unstably. an increase of the police can be explained by the proportion of the increase of the production and use of energy and refrigerating compressor as specified, cooling capacity of the system will remain at a constant value of 5 kW, but only ' cool ' capacity of refrigerating substances that vary according to changes of pressure, temperature and mass flow rate. In the case of Figure 5 expansion valve open to change from 116% to control and eventually launched the reduced to approx. 10.95% (Figure 5 (D) evening and gas pressure is upraised (6 images)
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