(a)The efficiency of the cycle (b)The amount of useful work that the machine produces (c)The heat rejected to the reservoir of the lower temperature.

Air is contained in a piston cylinder arrangement as undergoes a cycle as shown in the figure. The initial temperature T1 = 800oF and the amount of air is 1 lbm. The process from 3 to 1 is adiabatic. Determine the total work and the net heat transfer in Btu. Assume constant heat capacities.

Work is produced during a steam power plant cycle by the following equipment/step(s) (SELECT ALL that apply): Condenser Boiler Pump Turbine/Expander

A stream of ammonia is cooled from 100oC to 20oC at a rate of 180 kg/hr in the tube side of a double-pipe counter-flow heat exchanger. Water enters the heat exchanger at 10oC at a rate of 250 kg/hr. The outside diameter of the inner tube is 3 cm and the length of the pipe is 7m. Using the log-mean temperature difference, calculate the overall heat transfer coefficient (U) for the heat exchanger. Determine the heat transfer rate between the two fluids. Determine the outlet temperature of the water. Determine the heat transfer surface area. Determine the log-mean temperature difference. Determine the heat transfer coefficient for the heat exchanger.   Cp for ammonia is 5234J/kgK and cp for water is 4180J/kgK.

How much work must be input by the paddle wheel below to raise the piston 5 cm. The initial temperature is 100°F.

Problem 8. Energy is generated uniformly in a 20cm thick wall the steady state temperature distribution of the wall is indicated on the table below; z (cm) T (C) 8 10 12 14 16 18 20 0 2 4 6 150 177 205 230 250 272 292 310 330 345 360 If thermal conductivity of the wall is 15 W/m.K and the indicated temperatures are in °C, determine the average rate of heat generation in unit volume.