Aux 2 Unit 8 Refrigeration General overview

5. (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).

Aux 2 Unit 8 Q1

Aux 2 Unit 8 Quiz 1

Answer

5. 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.

Aux 2 Unit 8 Q2

Aux 2 Unit 8 Quiz 2

Answer

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.

Aux 2 Unit 8 Q3

Aux 2 Unit 8 Quiz 3

Answer

4. 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)

Aux 2 Unit 8 Q4

Aux 2 Unit 8 Quiz 4

Answer