Standard Technical Features of BTG System for Supercritical 660 ...
Standard Technical Features of BTG System for Supercritical 660 ...
Standard Technical Features of BTG System for Supercritical 660 ...
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<strong>Standard</strong> <strong>Technical</strong> <strong>Features</strong> <strong>of</strong> <strong>BTG</strong> <strong>System</strong> <strong>for</strong> <strong>Supercritical</strong> <strong>660</strong>/800 MW Thermal Unitsiv)Electric oil heater to heat oil to temperature not more than 65°C withpossibility to cut heater elements in steps, applicable <strong>for</strong> centrifugetype purifier.v) Duplex type filters/strainers with stainless steel element <strong>of</strong> size 5micron or a size suited to the requirement <strong>of</strong> the turbine.12.16 Turbine Control Fluid <strong>System</strong>Turbine control fluid shall be supplied either from turbine lubricating oilsystem or from a separate control fluid system as per standard practice <strong>of</strong> theOEM. In case <strong>of</strong> separate control fluid system, each unit shall be providedwith the following:i) Fire resistant fluid <strong>for</strong> control fluid system <strong>for</strong> servo motors <strong>of</strong> allhydraulically operated turbine stop and control valves, hydraulicallyoperated extraction NRVs and spray water valves <strong>for</strong> LP bypasssystem.ii)iii)iv)2x100% AC driven pumps connected to fluid reservoir along withhydraulic accumulators.Fluid reservoir <strong>of</strong> adequate capacity fitted with non-corrodablestrainers and 2x100% vapour extraction fans (if required as per type <strong>of</strong>control fluid used).2x100% control fluid coolers (water or air cooled) as per standardpractice <strong>of</strong> manufacturer.v) Control fluid purifying unit with capacity to purify at least 2% <strong>of</strong> thetotal fluid charge in the system per hour on a continuous/ intermittentbypass basis alongwith 2x100% capacity A.C. driven purificationpumps (<strong>for</strong> fluid circulation through purification system).vi)Duplex oil filters at downstream <strong>of</strong> all pumps with mesh size as perOEM’s standard and practice.vii) Tank, Piping and all other components <strong>of</strong> the system coming in contactwith control fluid shall be <strong>of</strong> stainless steel.12.17 Central Turbine Lubricating Oil Storage and Purification <strong>System</strong>A central turbine lubricating oil storage and purification system shall beprovided <strong>for</strong> the plant. The system shall consist <strong>of</strong> identical clean and dirty oiltanks each with capacity 1.5 times the capacity <strong>of</strong> one unit oil tank,purification system identical to unit purification system and 2x100% capacityoil transfer pumps with provision to add new oil to any unit oil tank.97
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