TURBINE AUXILIARIES (OIL SYSTEM -LUBE ) PART-I ABC OF THERMAL POWER PLANT

In continution of my last dispatch regarding Generator Gas system two

photographs of the system is attached.

TURBINE  LUBRICATION OIL SYSTEM 

 Turbine lubrication system is the most important auxiliary system in TG Package. As 

I discussed seal oil system of Generator , lubrication system of Boiler auxiliaries like 

FANS ( ID ,FD and PA) ,Mills and Airheaters. Therefore it is felt prudent to discuss 

the oil system of Turbine .

The Turbine Lube Oil System functions to provide storage, cooling, and continuous 

purification of the lubricating oil required for the main turbine and generator.

Turbine lube oil system contains following equipments and piping.

- A Turbine oil tank

- 2 Nos AC motor driven pumps for lubrication system

- One main oil pump ( coupled with main turbine )

- One Jacking oil pump ( 100%)

- One DC lube oil pump ( 100%)

- Two oil coolers ( 2x100%) with cooling water connection and change over valves.

- Duplex  oil filter

- Instrumentation Racks and Instruments local and remote.

- Turbine oil purifier portable having capability purification of 20% of tank volume.

- A central oil purification system.

- Piping portion of them pre- fabricated and rest are site routed.

-Two full capacity oil vapour extractor.

Piping shall be routed in a manner to avoid crossing or being directly above any 

steam lines and to allow gravity drainage where possible. The high-pressure supply 

piping shall be guarded by low-pressure return piping. Coolers and pumps shall be 

physically located in the oil reservoir. The supply and return piping shall be sloped to 

avoid air pockets and to allow proper drainage. Total erection jobs takes around 04 to

05 months depends up on the readiness of the Oil canal , Positioning of Pedestals (brg)

oil room including oil cooler foundations ,tank foundations other small foundation 

etc. Clean pipes and enviornment will help to reduce the oil flushing time . Therefore 

a system of preservation ,cleaning by compressed air is must during erection. All 

welding on pipelines to be completed otherwise it will be difficult to do it afterwards

due to potential fire hazards.

Oil tank with instruments are shown in the picture. Pumps are installed on the tank.

continued
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