A boiler operates at a constant pressure producing steam at a rate of 2520 kg/h with...

A boiler operates at a constant pressure producing steam at a rate of 2520 kg/h with a specific enthalpy of 2700 kJ/kg . The specific enthalpy of feed water to the boiler is 280 kJ/kg . The outlet pipe of the boiler is at a height of 15 m about the inlet pipe. The inlet and outlet velocities of 15 m/s and 35 m/s respectively.

Calculate

Change in enthalpy
Change in potential energy
Change in kinetic energy
The heat energy used by boiler

If 75% of the heat energy supplied by the combustion of coal is used by the boiler in forming steam, and combustion of 1 kg of coal produces 28000 kJ of heat energy.

Heat supplied to the boiler by combustion of coal
The mass flow rate of consumption of coal

Expert Solution

Amanda K answered 2 weeks ago

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