Thermodynamics and Heat Power 9th Edition solutions

Thermodynamics and Heat Power 9
A reversed Carnot engine operates between 150F and 60F; 100 Btu/min is extracted from the cold body. Determine the horsepower required to operate the engine.

Thermodynamics and Heat Power 9
An air-standard Otto cycle has a clearance volume equal to 10% of its displacement volume. Calculate the compression ratio and the efficiency of the engine.

Thermodynamics and Heat Power 9
A refrigerator operating between 0F and 100F removes 1000 Btu/min. If the COP is three-fourths of a Carnot refrigerator operating between the same temperatures, determine the power input and the rate of heat rejected by the actual cycle and the Carnot cycle.

Thermodynamics and Heat Power 9
Determine the enthalpy, specific volume, internal energy, and entropy of subcooled water at 500F and 4000 psia.

Thermodynamics and Heat Power 9
A body weighing 10 lb. is lifted 100 ft. What is its change in potential energy? What velocity will it possess after falling 100 ft?

Thermodynamics and Heat Power 9
An engine produces 10 kJ of work while 80 kJ enters the engine cycle as heat. Determine the energy rejected and the thermal efficiency of the cycle if it is reversible.

Thermodynamics and Heat Power 9
If the specific heat of the condenser cooling water is assumed to be unity and it is desired to limit the condenser cooling water temperature change to 50F in the condenser, determine the pounds of cooling water required per pound of steam for the ideal Rankine cycle operated from 600 psia and 600F t

Thermodynamics and Heat Power 9
The heat transfer rate through the walls of a house is 10,000 Btu/h per degree Fahrenheit difference between the outside and the inside. Select the compressor power required for a Carnot heat pump to cool the house in the summer. Design requirements are inside, 75F; outside, 95F.

Thermodynamics and Heat Power 9
Determine the specific volume, enthalpy, and internal energy of steam having a pressure of 5 psia and a quality of 90%.

Thermodynamics and Heat Power 9
A gas expands according to the equation, pv = 100, where p is the pressure in pounds force per square foot and v is the specific volume in cubic feet per pound mass. The initial pressure of the gas is 100 psfa, and the final pressure is 50 psfa. The gas is then heated at constant volume back to its o

Thermodynamics and Heat Power 9
To change a pound of saturated water to saturated steam at 32F, 1075.4 Btu/lbm is required. Determine the change in entropy for this process.

Thermodynamics and Heat Power 9
If saturated steam at 500 psia is superheated to a temperature of 1000F, determine the change in enthalpy and entropy between these two states. Assume the final pressure of the steam to be 500 psia.

Thermodynamics and Heat Power 9
An air-standard Otto cycle has 1400 kJ/kg added as heat. The initial conditions are 20C and 100 kPa. If the compression ratio is 7, determine the thermal efficiency of the cycle, the temperature and pressure at each point in the cycle, and its mean effective pressure.

Thermodynamics and Heat Power 9
A power plant burns 900 kg of coal per hour and produces 480 kW of power. If each kilogram of coal releases 5.9 MJ, determine the efficiency of the plant.

Thermodynamics and Heat Power 9
How does radiant heat transfer differ from conduction and convection heat transfer?

Thermodynamics and Heat Power 9
A process is carried out at constant volume. It is found that the entropy change is 1 kJ/kgK. If c v is constant and equal to 0.7186 kJ/kgK and the lower temperature of the process is 20C, determine the upper temperature.

Thermodynamics and Heat Power 9
There are four distinct events that occur in the Carnot cycle. Starting with the heat reception event, name and describe each one.

Thermodynamics and Heat Power 9
One kilogram of air is heated at a constant temperature of 40C by the addition of 200 kJ. Determine the change in entropy for this process.

Thermodynamics and Heat Power 9
Steam at 150 psia has a quality of 97%. What is the specific volume of this wet mixture?

Thermodynamics and Heat Power 9
An air-standard diesel engine has a compression ratio of 20. The cutoff ratio is 2.4. At the beginning of the compression stroke, the pressure is 100 kPa, and the temperature is 293 K. Calculate the thermal efficiency and the heat added per kilogram of air.