Answer / rajagopal

1.If there is no hp/lp bypass when the turbine is tripped and still boiler will be in service all the generated steam has to to evacuated by opening SH/RH vents.In presence of bypass system even when turbine is tripped we can possible to bypass the steam and dump it into condenser.
2.the major advantage of doing the above is we can maintain the boiler in hot condition with minimum steam generation cold start up and preservation after shutdown is quite difficult.

Answer / dwaragesh

To Mr. Rajagopal's answer also another advantage is DM water
is not wasted since it is collected in the condensor

Answer / dileep

To achieve rolling parameters we are using HP/LP Bypass system and in case of turbine tripped we evacuate residual steam.

Answer / m saqib rana

 waste heat energy sure

Answer / tarun sharma

in case any failure in hp and ip the steam need to bypass other wise the remval of steam from hp and lp is not possible

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