Power Plant Engineering for captive power plant

  How to improve efficiency of AFBC Boiler: 1.       Optimize combustion air supply:   Boiler is designed for particular air and fuel ratio. This ratio also related to excess O2 which is measured after APH . There is minimum excess O2 is to be maintained by tuning the air flow into the furnace. Typically, in AFBC and CFBC boiler excess O2 is maintained 2-3% in optimum operating condition. There are two types of air supplied in this type of boilers, one is primary air (PA) and another is Secondary Air (SA). There is also a ratio between the PA and SA air. PA is basically help to fluidise the bed and secondary air is used to create turbulence at the free board zone for better combustion. 2.       Improve Feed Water Temperature: Raising feed water temperature basically increase the cycle efficiency by reducing the fuel consumption. Every 6deg.C rise in feed water temperature increase the efficiency by 1%. 3.   ...

Check points for low vacuum in condenser   1.  Condenser and System Leak Checks ·         Inspect all flanges, joints, manholes, and sensor ports for air ingress. ·         Check for cracks on condenser body, vents , drains and pipe line. ·         Examine expansion bellows, rupture disks, and drain valves for leaks. ·         Use agarbati leak detection simple methods to find ingress points 2.  Ejector Inspection ·         Ensure vacuum ejectors are operating within design parameters. ·         Confirm proper operation of intake and exhaust valves. ·         Confirm ejector strainer and nozzles are properly cleaned 3.  Condenser Cooling and Water System ·     ...

 

  In general heat rate is defined as ratio of heat input to power output in a system, in other way requirement of heat energy to generate one unit of power. In case of power plant cycle , output is electrical power and input is any kind of energy in fuel . If we consider steam turbine heat rate , input energy to turbine is in the form of steam energy i.e enthalpy corresponds to pressure and temperature. Different cases for steam turbine are considered as follows: Steam Turbine Heat Rate: CASE1: This is the calculation for closed cycle, single cylinder, condensing type of turbine where steam inlet to turbine at point no1 is expanded to point 2 as per below fig : Turbine Heat rate: M= Mass flow rate of steam inlet to turbine, kg/hr                                           ...