Water enters a steam boiler at 23C and 5 MPa and leaves at the required process...

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Water enters a steam boiler at 23°C and 5 MPa and leaves at the required process heat temperature of 300 °C at the same pressure. Water enters the boiler at 12 L/sec. The boiler is biomass-fired, and the combustion process has an efficiency of 70%. If the heating value of biomass is 17 MJ/kg and the cost of biomass is 25 N$/kg, and the boiler works for 8 hours a day and 365 days (about 12 months) a year. Make calculations for: a) The annual fuel cost to company in N$, b) How much energy and money the company will save if the hot gases from the combustion of biomass are used to preheat the water feed to the boiler to an inlet temperature of 55 °C instead of 23°C, and c) Draw the heating process of the water in the boiler on a T-s diagram labelling all the states and pressures. Water enters a steam boiler at 23°C and 5 MPa and leaves at the required process heat temperature of 300 °C at the same pressure. Water enters the boiler at 12 L/sec. The boiler is biomass-fired, and the combustion process has an efficiency of 70%. If the heating value of biomass is 17 MJ/kg and the cost of biomass is 25 N$/kg, and the boiler works for 8 hours a day and 365 days (about 12 months) a year. Make calculations for: a) The annual fuel cost to company in N$, b) How much energy and money the company will save if the hot gases from the combustion of biomass are used to preheat the water feed to the boiler to an inlet temperature of 55 °C instead of 23°C, and c) Draw the heating process of the water in the boiler on a T-s diagram labelling all the states and pressures. Water enters a steam boiler at 23°C and 5 MPa and leaves at the required process heat temperature of 300 °C at the same pressure. Water enters the boiler at 12 L/sec. The boiler is biomass-fired, and the combustion process has an efficiency of 70%. If the heating value of biomass is 17 MJ/kg and the cost of biomass is 25 N$/kg, and the boiler works for 8 hours a day and 365 days (about 12 months) a year. Make calculations for: a) The annual fuel cost to company in N$, b) How much energy and money the company will save if the hot gases from the combustion of biomass are used to preheat the water feed to the boiler to an inlet temperature of 55 °C instead of 23°C, and c) Draw the heating process of the water in the boiler on a T-s diagram labelling all the states and pressures. Water enters a steam boiler at 23°C and 5 MPa and leaves at the required process heat temperature of 300 °C at the same pressure. Water enters the boiler at 12 L/sec. The boiler is biomass-fired, and the combustion process has an efficiency of 70%. If the heating value of biomass is 17 MJ/kg and the cost of biomass is 25 N$/kg, and the boiler works for 8 hours a day and 365 days (about 12 months) a year. Make calculations for: a) The annual fuel cost to company in N$, b) How much energy and money the company will save if the hot gases from the combustion of biomass are used to preheat the water feed to the boiler to an inlet temperature of 55 °C instead of 23°C, and c) Draw the heating process of the water in the boiler on a T-s diagram labelling all the states and pressures.

Answer rating: 100% (QA)

a The annual fuel cost to the company in NS To calculate the annual fuel cost we need to know the following The mass flow rate of water through the bo... View the full answer