SALIENT TECHNICAL FEATURES FOR VENTILATION SYSTEM PACKAGE FOR TANDA TPP, STAGE-II (2X660 MW)

“Salient Technical Features of the equipment/systems/services covered in IFB No. 40034810 is mentioned below. These Salient Technical Features are mentioned only to facilitate the prospective bidders to prima-facie understand the requirements under the tender and shall not in any way limit or alter the scope of work and technical features/specification of equipment/ systems/ services covered in the Bidding Documents. Detailed provisions in regard of scope of work and technical features/specification of equipment/systems/services, contained in the Bidding Document shall be final and binding.”

1.0 The broad scope of work under Ventilation System Package include Engineering, Manufacture, Testing at Works, Delivery and Storage at Site, Erection, Testing and Commissioning of all Ventilation Equipments & Associated Instrumentation for non-air conditioned areas of Main Power House, ESP Building, Gas Insulated Switchyard (GIS) building and other Auxiliary Buildings.

2.0 BRIEF DESCRIPTION OF VENTILATION SYSTEM :

2.1 Main Power House :

Each 660 MW unit would be provided with 10 nos. of metallic construction (modular type) air washer units (AWUs) each of capacity 1,00,000 m3/hr and 1 no. of metallic construction (modular type) air washer units (AWU) of capacity 50,000 m3/hr along with DIDW centrifugal fan with motor, pump with motor, instruments, piping and other accessories. These air washers shall be placed at various floors of TG building and shall supply cooled air to TG building by means of GSS/AL ducting, grills/ diffusers etc. Roof Extractors (RE) fans would be provided at roof of TG hall to exhaust hot air.

2.2 ESP Control room Building :

To cater to the ventilation requirements of non- air conditioned areas (switchgear room, cable galleries, etc.) of ESP building, one (1) no. of Unitary Air Filtration (UAF) unit of capacity 75,000 Cu.m/Hr would be provided along with DIDW centrifugal fan & motor, pump with motor, instruments, piping and other accessories for each unit of 660 MW. Cooled air shall be supplied to various non-A/C areas by means of GSS/AI ducting, grills/diffusers for each unit.

2.3 Supply air fans/Exhaust air fans/ Roof extractor fans with drive motors shall be provided for miscellaneous areas such as pump house, MCC room, battery rooms, cable galleries, toilets, etc. in Main pump house, Gas Insulated Switchyard (GIS) building and auxiliary buildings like canteen, CHP workshop, O&M workshop, compressor house, fuel oil pump house etc.

2.4 Ducts supplying air to switchgear rooms and cable spreader/ vault rooms in main power house and ESP building shall be provided with motor operated fire dampers. These dampers shall close in case of fire on receiving signals from the Fire Detection and Protection system.