Cogeneration Gas Turbine: NFPA 37, Enclosure Cooling ve CO2 Koruma

Cogeneration/trijenerasyon tesislerinde gaz turbini (GE Frame 5, Siemens SGT, Solar Taurus) dogal gaz yakar. 50-100 MW sinif turbinlerde lube oil, yakit gazi ve yuksek isi yangin riski olusturur. NFPA 37 (Stationary Combustion Engines and Gas Turbines) enclosure havalandirma, CO2 koruma ve gaz detektor kurallarini tanimlar.

Enclosure Havalandirma

• Normal: 30-50 ACH soguma icin
• Maksimum: Ic sicaklik 55 C ustu - fan artir
• Acil: CO2 aktivasyon oncesi kapat (damper)
• Purge: CO2 sonrasi 30 ACH zorunlu

CO2 Total Flooding

• Konsantrasyon: percent 50 (gas turbine)
• Hold time: 20 dakika
• Discharge: 1 dakika (yuzeysel yangin)
• Yedekleme: 100 percent reserve bank (NFPA 37 opt)
• Alarm: Pre-discharge 20 sn uyari

Lube Oil Sistemi

• Tank: 1500-3000 L, bearing sogutma
• Pompa: AC + DC emergency pump
• Seviye alarm: Low-level shutdown
• Yangin algilama: Linear heat (Listec), IR3 flame detector
• Water spray: Lube oil tank ve cooler uzerinde (NFPA 15 alternatif)

Dogal Gaz Regulator Station

• Basinc indirgeme: 70 bar -> 30 bar -> 5 bar (turbin giris)
• ESDV: Emergency Shut-Down Valve 2 seri
• Gaz detektor: 20 percent LEL alarm, 40 percent ESD
• Pressure safety valve: Over-pressure atmosfere vent (safe location)
• Filter separator: Sivi ve katı partikulleri tutar

Algilama ve Interlock

• UV/IR3 flame: 3 sn icinde algilar
• Vibration: Bearing/compressor arizasi
• Exhaust gas temp: >650 C alarm
• Hot Gas Path inspection: 8,000 saatte bir
• Trip logic: CO2 aktivasyonu ardindan turbin shutdown

Gas Turbine MEP Calc ile

MEP Calc cogeneration gas turbine enclosure havalandirma, CO2 total flooding ve dogal gaz regulator station hesabini NFPA 37 uyarinca yapar.

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