Class 2 (2nd Engineer) MEKG 📅 Jun 2024

Exam Question

(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)

Reference Answer

### (a) Block Diagram and System Description for a Fully Automated Accommodation Air Conditioning Unit
A fully automated accommodation air conditioning (AC) unit is a centralized system designed to maintain the temperature, humidity, and purity of air within the living and working spaces of a vessel to ensure crew comfort and safety. The system operates as a closed or semi-closed loop, treating a mix of recirculated air and fresh atmospheric air.
**Component Description and Air Flow Path:**
1. **Air Intake & Mixing:**

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