A steam power station uses coals of calorific value of 5308 kcal/kg. The overall efficiency of the power station is 21.5% and a coal power station uses 6,98 tonnes of coal every 15 minutes to generate the maximum demand. The purchasing price of coals is R600 per tonne. (NB: 1 kWh = 861 kcal) (a) Determine the coal consumption in kg per kWh (b) Determine the cost of purchasing the coals per week if the load factor is 65%.
A steam power station uses coals of calorific value of 5308 kcal/kg. The overall efficiency of the power station is 21.5% and a coal power station uses 6,98 tonnes of coal every 15 minutes to generate the maximum demand. The purchasing price of coals is R600 per tonne. (NB: 1 kWh = 861 kcal) (a) Determine the coal consumption in kg per kWh (b) Determine the cost of purchasing the coals per week if the load factor is 65%.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter2: Matter And Energy
Section: Chapter Questions
Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?
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1.1 A steam power station uses coals of calorific value of 5308 kcal/kg. The
overall efficiency of the power station is 21.5% and a coal power station uses 6,98
tonnes of coal every 15 minutes to generate the maximum demand. The purchasing
price of coals is R600 per tonne. (NB: 1 kWh = 861 kcal)
(a) Determine the coal consumption in kg per kWh
(b) Determine the cost of purchasing the coals per week if the load factor is 65%.
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