1) A 300 hp (223.71 kW) truck engine consumes fuel at a rate of 10.567 gallons every hour (40 L/h). The fuel has a heating value of 45 MJ/kg and a density of 0.8 g/cm3. What is the thermal efficiency of this engine?
2) A 200 MW power plant creates steam by burning coal with a heating value of 25,000 kJ/kg. The coal-burning furnace requires 12 kg of air for every 1.0 kg of coal burned. If the power plant has an overall thermal efficiency of 32%, determine (a) the amount of coal consumed during one day in kg and (b) the mass flow rate of air through the furnace in kg/s.