Q: Describe an imaginary process that violates both the first and the second
Describe an imaginary process that violates both the first and the second laws of thermodynamics.
See AnswerQ: A house is losing heat at a rate of 1800 kJ/
A house is losing heat at a rate of 1800 kJ/h per °C temperature difference between the indoor and the outdoor temperatures. Express the rate of heat loss from this house per (a) K, (b) °F, and (c) R...
See AnswerQ: A heat engine that propels a ship produces 500 Btu/lbm
A heat engine that propels a ship produces 500 Btu/lbm of work while rejecting 300 Btu/lbm of heat. What is its thermal efficiency?
See AnswerQ: A steam power plant with a power output of 150 MW consumes
A steam power plant with a power output of 150 MW consumes coal at a rate of 60 tons/h. If the heating value of the coal is 30,000 kJ/kg, determine the overall efficiency of this plant.
See AnswerQ: An automobile engine consumes fuel at a rate of 22 L/
An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If the fuel has a heating value of 44,000 kJ/kg and a density of 0.8 g/cm3, determine the efficiency o...
See AnswerQ: Solar energy stored in large bodies of water, called solar ponds
Solar energy stored in large bodies of water, called solar ponds, is being used to generate electricity. If such a solar power plant has an efficiency of 3 percent and a net power output of 150 kW, de...
See AnswerQ: A coal-burning steam power plant produces a net power of
A coal-burning steam power plant produces a net power of 300 MW with an overall thermal efficiency of 32 percent. The actual gravimetric air–fuel ratio in the furnace is calculated to be 12 kg air/kg...
See AnswerQ: An Ocean Thermal Energy Conversion (OTEC) power plant built in
An Ocean Thermal Energy Conversion (OTEC) power plant built in Hawaii in 1987 was designed to operate between the temperature limits of 86°F at the ocean surface and 41°F at a depth of 2100 ft. About...
See AnswerQ: A country needs to build new power plants to meet the increasing
A country needs to build new power plants to meet the increasing demand for electric power. One possibility is to build coal-fired power plants, which cost $1300 per kW to construct and have an effici...
See AnswerQ: Reconsider Prob. 7–26. Using appropriate software, investigate
Reconsider Prob. 7–26. Using appropriate software, investigate the price of coal for varying simple payback periods, plant construction costs, and operating efficiency. Data from Prob. 7-26: A countr...
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