Q7. A. Draw a block diagram for a fully automated accommodation air conditioning unit, labelling the component parts and indicating the directions of air flow. (8)
B. Explain why the unit includes means of dehumidification and humidification. (4)
C. A chart is used for ensuring that the accommodation conditions are within the so-called Comfort Zone: what useful information does the chart give? (4)
Q7. Explain the purpose and main components of an air conditioning system used on ships. Describe the layout and working of the system with the help of a neat diagram. Discuss the function of the unloader in the compressor and its importance during system operation. (10)
(b) Name the thermodynamic cycle on which the marine air conditioning system operates. Explain this cycle using a pressure-enthalpy (P-h) diagram and describe the role of each component in the cycle. (6)
Q2. With reference to Air conditioning systems onboard for accommodation spaces:
a) Sketch and explain a fully automated air conditioning system, annotating the relevant temperatures and relative humidity’s throughout the system. (12)
b) Explain how bacteria are prevented from growing in an air conditioning system to a dangerous degree. (4)
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
DieselShip support
Send us a message and we'll reply by email, usually within one business day.
We've logged your ticket and sent a confirmation to your email.
