Refrigeration LAWS and Parts (140102a)

Question 1

Boyle’s law

Answer 1

A decrease in the volume of an ideal gas that has a constant temperature results in a proportional increase in pressure of that gas. A decrease in the pressure of an ideal gas will result in proportional volume increase. Changes in the pressure and volume of an ideal gas are inversely proportional as long as the temperature retains constant.

Question 2

Charles law #2

Answer 2

A change in TEMPERATURE of an ideal gas at constant PRESSURE results in a proportional VOLUME change in that gas.

Question 3

Charles Law #1

Answer 3

A change in ABSOLUTE PRESSURE of an ideal gas at constant VOLUME results in a proportional ABSOLUTE TEMPERATURE CHANGE for that gas.

Question 4

Dalton’s law of Partial Pressures

Answer 4

The total pressure of a mixture of gases is the sum of the individual pressures of each gas.

Question 5

Pascals Law potential energy

Answer 5

Pressure applied to a fluid is equal in all directions. Energy based on position.

Question 6

Bernoulli’s Law

Answer 6

An increase in velocity pressure from increasing fluid flow results in a decrease in the static pressure of that fluid.

Question 7

1. ) Dry expansion= normal

2. ) Flooded = Chillers

Answer 7

Two types of Evaporators.

Question 8

1. ) Capillary Tube
2. ) Automatic Expansion Valve
3. ) Small Thermostatic Expansion Valve
4. ) Large Thermostatic Expansion Valve

Answer 8

Metering Devices

Question 9

1. ) Water Cooled (wastes water) OLD

2. ) Air Cooled (new)

Answer 9

Two types of condensers

Question 10

1. ) Reciprocating
2. ) Rotary
3. ) Scroll
4. ) Screw
5. ) Centrifugal

Answer 10

Compressors

Question 11

Both rotary and Screw compressors because they are one directional

Answer 11

Check Valves on what compressors and why?

Question 12

Coefficient of performance

Answer 12

NRE (Net refrigeration effect) \ HOC (heat of compression)