Explain the process of producing charcoal biofuel. Water initially at 20 °C and having a mass of 100 kg is to be heated to 100°C in a boiler using charcoal as fuel. Charcoal has energy density of 25 MJ/kg and water has a specific heat capacity of 4.2 kJ/kg-C. How many kilograms of charcoal is needed if boiler efficiency is 30%?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
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ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter1: Basic Modes Of Heat Transfer
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Problem 1.75P: Referring to Problem 1.74, how many kilograms of ice can a 3-ton refrigeration unit produce in a...
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A. Explain the process of producing charcoal biofuel.
B. Water initially at 20 °C and having a mass of 100 kg is to be heated to 100°C in a boiler using charcoal as fuel. Charcoal has
an energy density of 25 MJ/kg and water has a specific heat capacity of 4.2 kJ/kg-C. How many kilograms of charcoal is needed if
the boiler efficiency is 30%?
Transcribed Image Text:A. Explain the process of producing charcoal biofuel. B. Water initially at 20 °C and having a mass of 100 kg is to be heated to 100°C in a boiler using charcoal as fuel. Charcoal has an energy density of 25 MJ/kg and water has a specific heat capacity of 4.2 kJ/kg-C. How many kilograms of charcoal is needed if the boiler efficiency is 30%?
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