11Emergency governing When the speed of shaft increases beyond 110%. Balancing of the turbine is disturbed.Failure of the lubrication system.Vacuum in the condenser is quite less or supply of coolant to the condenser is inadequate.
18Types Of CondensationFilm-wise condensation: condensed liquid wets the surface andforms a film covering the entire surface.Drop-wise condensation: surface is not totally wetted by thesaturated vapor, and the condensate forms liquid droplets that fall.from the surface.Compared to film-wise condensation, drop-wise condensation has a greater.surface heat-transfer coefficient as it has a greater area exposed to the.saturation vapor.
19Stages in Condensation De-superheating of the hot gas.Condensing of the gas to liquid state and release of the latent heat.Sub-cooling of the liquid refrigerant.
26Condenser Cleaning Program Cleaning the condenser coils will ensure:maximum efficiency.help prolong the life of the unit.protect your Pumps from premature failure.maximize your overall investment.
27Steps Of CleaningFirst, and most importantly, turn off the power to the unit.Remove any visible grass.Brush in the same direction as the slots between the fins .You can do a better job if you remove the guard grill, which protects the coil.Wear a dust mask to avoid breathing the dust.Then put on a pair of rubber gloves and spray biodegradable outdoor coil cleaner into the coil.. Wait five or ten minutes and flush the coil with a gentle water spray. Use a gentle spray because a strong spray could bend the aluminum fins.That’s it! Simply restore the power to your AC unit and you’ll have a much smoother running air conditioner.
30Preheating feedwater before entering the boiler. Feedwater heaterPreheating feedwater before entering the boiler.
31How feedwater heater works?! We use a stream of the steam to heat the feedwater instead of using fuel.The extracted steam comes from the turbine.We extract steam at specific conditions and pressure to gain good output work from turbine.
32Main types of feedwater heaters Open feedwater heaterClosed feedwater heater
53Fluidized Bed Combustion (FBC) Boiler Compact boiler design , Fuel flexibility , Higher combustion efficiency.Uses solid particles with aid of high velocity (turbulent) air or gas.Superheated air stream with solid particles forms fluidized solution.
54Fluidized Bed Combustion (FBC) Boiler Atmospheric Fluidized Bed Combustion (AFBC) BoilerUses at atmospheric pressure.Pressurized Fluidized Bed Combustion (PFBC) BoilerUsed as a pressurized pressure vessel with aid of compressor to compress inlet air and hence high temp and better efficiency.Atmospheric Circulating Fluidized Bed Combustion Boilers (CFBC).
55The Inside Story Basic Control. Feed Water Control. Pressure Application.Increased Demand.