Gas Compressor ESD & Blowdown

Briefing

Commission a gas-compressor package with process permissives and an emergency-shutdown path. On a valid start, open suction and recycle, start the compressor, then transition from recycle to discharge only after the rotor reaches speed. The process model calculates rotor acceleration and discharge pressure. Fire-and-gas loss, safety-chain loss, lubrication/suction failure or high discharge pressure must latch ESD, isolate the compressor and open blowdown.

Objectives

• Accept a start only with E-stop, fire-and-gas, lubrication, suction pressure and outlet permissives healthy
• Start unloaded with suction and recycle open before placing the compressor on line
• Close recycle and open discharge only after COMPRESSOR_AT_SPEED is proven
• Latch ESD on a safety or high-pressure demand and remove all run outputs
• Open blowdown during ESD and reject reset until the initiating condition is healthy

I/O Table

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

1. #1Invalid permissive blocks startup

   A missing fire-and-gas healthy signal latches ESD and keeps the package isolated

2. #2Compressor starts unloaded then goes on line

   Recycle remains open until speed is proven, then discharge opens

3. #3Fire-and-gas demand triggers ESD and blowdown

   Loss of FIRE_GAS_OK isolates the running package and opens blowdown

4. #4Blocked outlet creates a high-pressure ESD

   The physical pressure model reaches high-high pressure and trips the package