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Class 2 (2nd Engineer) MEKG 📅 Jan 2017

Exam Question

(a) Explain the necessity of intercoolers on a multi-stage compressor. What attention is required to keep them safe and in good working order? Sketch and describe an intercooler suitable for a 2400 kPa compressor and state the materials used.

(b) What attention is needed before opening up for inspection? What faults are likely to develop in an air compressor and how are they remedied.

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Reference Answer

(a) Necessity of Intercoolers on a Multi-Stage Compressor:
Compressing air generates heat, and intercoolers reduce the temperature of air before it enters the next stage, protecting components from heat damage.
Cooler air requires less work for compression in subsequent stages, improving overall efficiency.
By lowering operating temperatures, intercoolers reduce thermal stresses on components, enhancing durability.

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