Class 4 (4th Engineer) MEKG 📅 Apr 2023

Exam Question

Describe the constructional features of plate type fresh water generator and its operational procedures for fresh water generation; (6)

(i) State the temperatures and pressures at salient points (4)

(ii) State some of the advantages and limitations that exist in using a plate type heat exchanger. (6)

Reference Answer

### Constructional Features and Operational Procedures
**A. Constructional Features (Based on a single-stage plate type design):**
A plate-type freshwater generator is a compact vacuum distillation unit that utilizes waste heat from the main engine's jacket water. It is comprised of a single frame containing two distinct plate heat exchanger sections: the evaporator and the condenser.
* **Frame and Plates:** The unit consists of a fixed frame plate and a movable pressure plate. Between these, a pack of thin, corrugated plates made of a corrosion-resistant material (typically titanium) are compressed by tie bolts.

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