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 26RQ: How many Btu of heat can be produced by 4 kWh ofelectricity?

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