A device that operates on a permanent basis is capable of producing 135 kJ of work for each kg of H2O inside. The pressure and temperature of input are 600 kPa and 200 °C, respectively, with input speed of 16 m/s. It is known that the inlet pipe is 32 m high in relation to the level of the ground and that the outlet pipe is exactly at ground level. The conditions of discharge are 280 kPa, 150 °C and 270 m/s. Heat loss to the environment between the inlet and outlet of the device is 9 kJ/kg of fluid. Determine the variation of the specific internal energy of the fluid when draining inside this device.

A device that operates on a permanent basis is capable of producing 135 kJ of work for each kg of H2O inside. The pressure and temperature of input are 600 kPa and 200 °C, respectively, with input speed of 16 m/s. It is known that the inlet pipe is 32 m high in relation to the level of the ground and that the outlet pipe is exactly at ground level. The conditions of discharge are 280 kPa, 150 °C and 270 m/s. Heat loss to the environment between the inlet and outlet of the device is 9 kJ/kg of fluid. Determine the variation of the specific internal energy of the fluid when draining inside this device.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

It is proposed to pump 10,000 kg/h of toluene at 114°C and 1.1 atm abs pressure from the reboiler of a distillation tower to a second distillation unit without cooling the toluene before it enters the pump. If the friction loss in the line between the reboiler and pump is 7 kN/m^2 and the density of toluene is 866 kg/m^3, how far above the pump must the liquid level in the reboiler be maintained to give a net positive suction head of 2.5m?
A 2-stage air compressor operates between constant pressure limits of 0.098 MPa and 1.103 MPa. The swept volume is 14.4 m3/min. Due to failure of the cooling water supply in the intercooler, air is passed to the high pressure cylinder without reduction in temperature. Using PV1.3 = C, determine the percentage increase in power.
A nozzle operates with steam entering at 700 kPa and 300 °C. The velocity at the inlet is 30 m/s. As the steam flows through the nozzle, the pressure decreases. Determine the area ratio value (Area / Area inlet), where Area inlet is the cross sectional area of the nozzle at the inlet, at the sections of the nozzle where the pressure values are 650, 550, 450, 350, and 250 kPa. Assume nozzle operates isentropically.
Air at a 800 kPa and 1300 K enters a turbine which has an isentropic efficiency of 90% with a mass ﬂow rate 6 kg/s. The outlet pressure is 100 kPa and assume that speciﬁc heats are constant and evaluated at 600 K. 1. How much power is produced in kW? Round your answer to the nearest whole number. 2. What is the outlet temperature in K? Round your answer to one decimal place.
A rotary air compressor is required to deliver 900 kg of air per hour. The enthalpy of the air at inlet and exit are 300 kJ/kg and 500 kJ/kg, respectively. The air velocity at the entrance and exit are 10 m/s and 15 m/s, respectively. The rate of heat loss from the compressor is 2500 W. Determine the power required to drive the compressor. Provide complete solution with diagram
A two stage compressor is used to compress 800 m3 /h of CO2 measured at 288K and 1 bar from its initial state of 0.5bar and 30k to a pressure of 1.5 bar with inter cooling to 300K. A compression efficiency of 85% may be assumed in each stage. Calculate the power required to run the compressor and the discharge temperature.
Steam expands adiabatically in a nozzle from inlet conditions of 130(psia), 420(°F),and a velocity of 230(ft)(s)−1 to a discharge pressure of 35(psia) where its velocity is2000(ft)(s)−1. What is the state of the steam at the nozzle exit, and what is SG for theprocess?
In a large refrigeration plant it is necessary to compress a fluid, which we willassume to be an ideal gas with constant heat capacity, from a low pressure P1 to a a much higher pressure P2. If the compression is done in a single compressor that operates reversibly and adiabatically, obtain an expression for the work needed for the compression in terms of the mass flow rate, P1, P2, and the initial temperature, T1. (Please write assumptions)
A turbine is driven by a system that enters the turbine at the ff. conditions: 500 kg/h, 44 atm, 450 deg C, 60 m/s linear speed. The steam exits at a point five meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 360 m/s speed. 70,000 W of shaft work is delivered by the turbine while 104 kilocalories/h heat is lost. Why is expansion work 0 and why cannot the flow work be calculated?
In an adiabatic turbine, this steam flow is 50 kg / s. The power produced by the turbine is 29 MW.Steam enters the turbine with a pressure of 50 bar and a speed of 60 m / s. At the outlet, at a pressure of 0.06 barIt comes out as saturated water with a speed of 130 m / s. Accordingly, the heat lost by the turbine andFind the turbine inlet and outlet temperatures of steam
A turbine, operating under steady-flow conditions, receives X1 kg of steam per hour (For X1 refer Table. 1). The steam enters the turbine at a velocity of 3000 m/min, an elevation of 5 m and a specific enthalpy of 2787 kJ/kg. It leaves the turbine at a velocity of 6000 m/min, an elevation of 1 m and a specific enthalpy of 2259 kJ/kg. Heat losses from the turbine to the surroundings amount to 16736 kJ/h. Determine the power output of the turbine.
P25. 200 kg/h of air is compressed adiabatically, assuming that ∆ ep = 0. The fluid enters the compressor at 0.9 Bar and 17°C, and leaves it at 750 kPa and 187°C. Make a diagram appropriate to the statement, calculate the input/output ratio so that ∆ec is negligible and determine the power delivered to the compressor.