An electric motor has a rated power of 15 kW, running the engine for 12 hours. If the efficiency of the motor is 89%, calculate the amount of electrical energy used.
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- What is the Btu/hour output of an electric heater rated at 15 kilowatts? a. 51.15 Btu/hour b. 51,150 Btu/hour c. 5115 Btu/hour d. none of the aboveThe cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is 8.8¢/kWh, and the clothesdryer is used for 700 hours in a year, what is the power rating of the clothes dryer?A motor in a building for driving pumps is rated at 250 KVA with a power factor of 0.8. If energy is worth P 15 / KWh, Find the cost of operating the motor ( Php) for 5 hours. Take motor efficiency of 95 %.
- A 60 MW thermal station has overall efficiency of 30%. If coal for the station has an energy of 6950 kcal per kg, calculate coal usage per kWhDetermine the thermal efficiency of a steam power station given the following data: Coal consumption = 0.60 kg/ kWhHeating value of coal = 6600 kcal / kgA 77-hp motor that has an efficiency of 90.14% is soon to be obsolete. It will be replaced by a high efficiency motor which is 96.1% efficient. The motor operates 4,368 hours a year. Taking the cost of electricity to be ₱8.67 per kWh, compute for the annual savings due to the installation of the high-efficiency motor instead of the standard motor. Round your answer into two decimal places only.
- ). A laptop computer consumes an average power of 20 W. The rechargeable battery has a voltage of 12 V and capacity of 5800 mAh. How long can the laptop run on a single battery charge?A 1000MW thermal plant has an overall efficiency of 34%. If the coal used has a heating value of 10,800BTU per pound, calculate the coal consumption of the plant per KWHRA 75 MW thermal power station uses coal of calorific value of 6400kcal/kg. Thermal efficiency of the station is 30% while electrical efficiency is 80%. Calculate the coal consumption per hour when the station is delivering its full output.
- if a solar thermal electric plant generates 100 X 10^6 watts (100 MWe) of electric power, how much revenue is lost if the power plant shuts down for 5 hours. Assume that the cost of electricity in the state is $0.1/kWh.A thermal station has the following data: Max. Demand = 40,000 kW, Load factor = 60%. Thermal efficiency = 75%, the cost of 1 ton of coal is 100 OMR. The quantity of coal consumed per year is 126144 kg. Calculate the consumed coal to produce 1kWh of Electrical energy.An electric motor develops a mechanical power of 20hp with 88% efficiency. Find its electric input power.
