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Consider the process of heating water on top of an electric range. What are the forms of energy involved during this process? What are the energy transformation
Consider the ideal Otto, Sterling, and Carnot cycles operating between the same temperature limits. How would you compare the thermal efficiencies
Consider an ideal steam regenerative Rankine cycle with two feedwater heaters, one closed and one open
Consider an equimolar mixture of oxygen and nitrogen. Determine the critical temperature, pressure, and density for stagnation temperature and pressure
Consider an ideal heat pump that has a condenser temperature of 50°C and an evaporator temperature of 0°C, determine the coefficient of performance
Consider an ideal gas refrigeration cycle using helium as the working fluid. Helium enters the compressor at 100 kPa and -10°C and compressed to 250 kPa.
Consider an ideal Brayton cycle executed between the pressure limits of 1200 and 100 kPa and temperature limits of 20 and 1000°C with argon as the working fluid
Consider an infinitesimal reversible adiabatic compression or expansion process. By taking s = s(P, v) and using the Maxwell relations
Consider an ideal steam reheat cycle in which the steam enters the high-pressure turbine at 600 lbf/in 2, 700 F, and then expands to 120 lbf/in.2.
Consider an ideal steam regenerative cycle in which steam enters the turbine at 3.5 MPa, 400°C, and exhausts to the condenser at 10 kPa
Consider an ideal refrigeration cycle that has a condenser temperature of 45°C and an evaporator temperature of -15°C;
Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant-134a as the working fluid
Consider subsonic flow in a converging nozzle with fixed inlet conditions. What is the effect of dropping the back pressure to the critical pressure on?
Consider an ideal air-standard cycle for a gas-turbine, jet propulsion unit, such as that. The pressure and temperature entering the compressor are 90 kPa
Consider one cylinder of a spark-ignition, internal-combustion engine. Before the compression stroke, the cylinder is filled with a mixture of air and methane
Consider the springtime melting of ice in the mountains, which gives cold water running in a river at 2°C while the air temperature is 20°C
Consider a steam power plant that operates on the regenerative Rankine cycle with one open feedwater heater
Consider a tank that contains a saturated liquid-vapor mixture of water in equilibrium. Some vapor is now allowed to escape the tank at constant temperature
Consider a tank that contains moist air at 3 atm and whose walls are permeable to water vapor. The surrounding air at 1 atm pressure also contains some moisture
Consider a two-part process with an expansion from 0.1 to 0.2 m3 at a constant pressure of 150 kPa followed by an expansion from 0.2 to 0.4 m3
Consider a TV set that consumes 120 W of electric power when it is on and is kept on for an average of 6 hours per day
Consider a three-stage isentropic compressor with two intercoolers that cool the gas to the initial temperature between the stages.
Consider an 18-m-diameter hot-air balloon that, together with its cage, has a mass of 120 kg when empty.
Consider a water pump that receives liquid water at 15oC, 100 kPa and delivers it to a same diameter short pipe having a nozzle with exit diameter of 1 cm
Consider a two-stage cascade refrigeration cycle and a two-stage compression refrigeration cycle with a flash chamber