## QUESTION

solve for electrical . see the following questions. Please make sure answers are typed and clear so I can read it easily. I’ll provide you with module after conforming bid.

1) Boiler of a biomass based thermal power plant has steam production capacityof 360 metric tons (MT) per hour. In order to produce one ton of steam from water, the energy required is 2 GJ (Giga Joule). If the biomass supplied to the combustion chamber of the boiler has a higher heating value of 40 GJ/MT, determine the required fuel flow rate, in kg/s to the combustion chamber. Assume the combustion efficiency is 85%.

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2) A ton of wood has moisture content 2% at room temp. How much heat need to be supplied to completely dry it? Heat capacity of water, 4184 joule/kg.°C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram. The heat of vaporization at 100 °C is about 2,230 joules (533 calories) per gram.

3) Suppose wood chip is planned to be used in coal fired power plant to reduce cost thus to make it co-firing. Wood chip has HHV of 15 MJ/kg that of anthracite coal is 32.5 MJ/kg which is currently being used. Calculate the average higher heating value when the mixture contains 25%, 50%, and 75% wood by mass. The combustion chamber of the boiler was running with an efficiency of 85 %. If the fuel supply rate (mass flow rate of fuel to the combustion chamber) and steam production remains same, calculate the new efficiency if the coal is replaced by a fuel mixture that contains 25% wood chip.

4) Consider a digester tank like a cylinder with height 7 meter and diameter 3 meter. Two third of this tank is filled with animal waste. After seven days of digestion, the remaining empty part of the tank was filled with biogas. The pressure and temperature measure inside the tank were 2 atm and 45 °C respectively. Now answer the following questions:

a. Calculate the volume of the empty part of the tank which got filled with biogas and volume of biogas at STP.

b. If a gas woven burn $1_{3}$ of this biogas at STP for 45 minutes, for how long this burner can burn the biogasproduced by the digester?

5) This question is about calculating calorific value of a fuel and MPG of a car. Now answer the following questions:

a. Calculate calorific value of E15 fuel.

b. A car run by gasoline has highway mpg 33. If it runs by E15, calculate the new mpg. If it runs only by ethanol what would be new mpg? Ignore all other effects.

## ANSWER