Compute the maximum coefficient of heat pump
An air conditioner running with R-134a on a cycle executed under the saturation dome between the pressure limits of 0.8 MPa and 0.12 MPa. Calculate the maximum Coefficient of this heat pump.
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Compresion is adiabatic to 9 bar, 60C ,and saturated liquid exits the condenser at 9 bar. Draw the (T-S) diagram of the cycle and determine the cooling capacity of the system, in tons.
Estimate the design-stage uncertainty in determining the voltage drop across an electric heating element. The heater has a nominal resistance of 30 Ohms and a power rating of 500 W.
In gantry crane ,there are are two motors one for horizontal motion , i.e. 400kg weight is to be moved 6m with 100m/min.Another motor is to lift 1500 kg weight vertically of 0.6m with speed 20m/min. power is transmitted through rack and pinion.
The inlet and outlet diametersof the nozzle are20 mm and10 mm respectively. Determine the mass flow rate of steam through the nozzle and inlet and outlet velocities.
If it suddenly exposed to a convection environment at 50 C with h = 1200 W/m2 K, how long does it take for the center temperature to cool to 80 C? Also calculate the heat loss per unit length.
A boiler receives a constant flow of 5000 kg/h liquid water at 50 bar and 20 degrees C, and it heats the flow such that the exit state is 440 degrees C with at pressure of 40 bar.
If the pressure at the water surface is atmospheric, what force must be applied at the lower edge of the door in order to keep the door from opening?
Determine the enthropy change of the system and the surrounding and show that the principle of increase of entropy is satisfied.
The specific volume of the gas remains constant from state 1 to 2. Assume P1 > P2. Indicate states 1 and 2, and mark the direction of the process by an arrow.
If the pressure at the final state is 300 kPa, determine (a) the temperature and quality of the steam (if mixture) at the final state and (b) the amount of heat lost from the tanks.
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