11.4 Air conditioning

Question 1

what is meant by the term adiabatic ?

Answer 1

temperature change without the addition or removal of heat

Question 2

what is meant by the term conduction?

Answer 2

transfer of heat from one object to another due to physical contact of the two objects

Question 3

what is meant by the term convection?

Answer 3

the processby which heat is transfered by bulk movement of a fluid

Question 4

what is meant by the term radiation?

Answer 4

transfer of energy between objects without a need for a medium

Question 5

what is meant by the term latent heat?

Answer 5

heat that causes a substance to change its state with no change in temperature

Question 6

what is meant by the term sensile heat?

Answer 6

when heat is applied, it causes a temperature change that can be sensed

Question 7

what is meant by the term super heat?

Answer 7

heat energy added to a gas after complete evaporation

Question 8

what is meant by the term humidity?

Answer 8

the amount of water vapour present in a volume of air

Question 9

how does compressing and expanding air effect its properties?

Answer 9

adds and removed energy from the air

Question 10

what are the two types of ACS used on aircraft?

Answer 10

-air cycle machine (larger aircraft)
-vapour cycle machines (smaller aircraft)

Question 11

what are the majority of ACS designed to do?

Answer 11

• supply ventilation air
• supply heated air
• supply cooled air
• cabin pressurisation
• equipment cooing