COMBINED CYCLE GAS-STEAM (TWO STEAM PRESSURE LEVELS)

COMBINED CYCLE (TWO STEAM PRESSURE LEVEL)
RE-VAP TA 5/45/SH/ECO + RE-VAP TA 2/12/SH/ECO

Plant description:
Heat Recovery Steam Generator downstream gas internal combustion engines Rolls Royce R-R B12 (5,1 MWel).

The superheated steam generator is water-tube type, natural circulation, consisting of two boiler sections with two different steam pressure levels (45 barg, 12 barg), complete of integrated convective steam superheater and economiser for feedwater preheating.

Number of installed units: n.2 steam generator (two steam pressure levels each one) installed downstream n.4 gas engines R-R B12.

High pressure section technical data
RE-VAP TA 5/50/SH/ECO
– Steam production: 5 t/h
– Operation pressure: 45 barg
– Superheated steam temperature: 360 °C
– Feedwater temperature: 105 °C
– Boiler design pressure: 50 barg

The high pressure superheated steam is connected to a further heat recovery steam superheater downstream a gas turbine Centrax KB7 (5,1 MWel), where the steam is re-superheated from 360 °C up to 450 °C and then feeds a steam turbine generating about 2,5 MWel.
Therefore a very high efficiency Combined Cycle gas-steam is performed in this installation.

High pressure section technical data
RE-VAP TA 2/15/SH/ECO
– Steam production: 2 t/h
– Operation pressure: 12 barg
– Superheated steam temperature: 210 °C
– Feedwater temperature: 105 °C
– Boiler design pressure: 15 barg

The low pressure superheated steam is used in the prodution process of a notable glass factory.