Which component supplies clean air to the regenerator?

• A. the inlet air pre-filter
• B. the compressor outlet
• C. the combustor
• D. the gasifier

Answer: (B)

The regenerator is fed by clean, high-pressure air that comes straight from the compressor outlet. After ambient air is cleaned by the inlet filter, it enters the compressor, where it is pressurized and still clean enough to flow through the regenerator. The regenerator then uses heat from exhaust to preheat that air before it goes to the combustor. The combustor and the gasifier are not sources of air to the regenerator; they play different roles in the cycle.