- (a) Explain EACH of the following refrigeration terms:
(i) superheated;
(ii) saturation temperature;
(iii) sub-cooled.
(b) Sketch a basic vapour compression refrigeration system, showing the refrigerants condition as explained in part (a).
- With reference to refrigeration systems:
(a) state the THREE basic laws of refrigeration;(6)
(b) state the location and method of re-setting of EACH of the following:
(i) the High Pressure cut out;(2)
(ii) the Low Pressure cut out.(2)
Question 5. Well answered by most.
4.(a) State THREE reasons for the operation of a High Pressure Cut-out in a vapour compression refrigeration system.(3)
(b) Describe the operation of the High Pressure Cut-Out, employed in a vapour compression refrigeration system shown in the figure.
- Describe, with the aid of a sketch, the operation of the FOUR main components in a simple vapour compression cycle for a refrigeration system.(10)