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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
Consider a two-phase mixture of ammonia and water in equilibrium. Can this mixture exist in two phases at the same temperature but at a different pressure
Consider a piston cylinder with 0.5 kg of R-134a as saturated vapor at -10°C. It is now compressed to a pressure of 500 kPa in a polytropic
Consider a river flowing toward a lake at an average velocity of 3 m/s at a rate of 500 m3/s at a location 90 m above the lake surface
Consider an electric motor with a shaft power output of 20 kW and an efficiency of 88 percent. Determine the rate at which the motor dissipates heat to the room
Consider an alcohol and a mercury thermometer that read exactly 0°C at the ice point and 100°C at the steam point.
Consider a methane-oxygen fuel cell in which the reaction at the anode is CH4 + 2H2O CO2 + 8e- + 8H+
Consider a refrigerator that consumes 320 W of electric power when it is running. If the refrigerator runs only one quarter of the time and the unit cost
Consider a room that is initially at the outdoor temperature of 20°C. The room contains a 100-W lightbulb, a 110-W TV set, a 200-W refrigerator
Consider a refrigerator that operates on the vapor compression refrigeration cycle with R-134a as the working fluid
Consider a refrigeration system using refrigerant- 134a as the working fluid. If this refrigerator is to operate in an environment at 30°C
Consider a steady-flow Carnot cycle with water as the working fluid executed under the saturation dome between the pressure limits of 8 MPa and 20 kPa.
Consider a solar-energy-powered ideal Rankine cycle that uses water as the working fluid. Saturated vapor leaves the solar collector at 350 F, and the condenser
Consider a small air pistol with a cylinder volume of 1 cm3 at 250 kPa, 27°C. The bullet acts as a piston initially held by a trigger