Steam at a pressure of 0.08 bar and a quality of 99.0% enters a shell-and-tube heat exchanger where it condenses on the outside oftubes through which cooling water flows, exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing steam is 5.8 x105 kg/h. Cooling water enters the tubes at 15°C and exits at 35°C with negligible change in pressure.Neglecting stray heat transfer and ignoring kinetic and potential energy effects, determine the mass flow rate of the cooling water, inkg/h, for steady-state operation.mwater = i 568765.92kg/h

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Answered: Steam at a pressure of 0.08 bar and a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A 1.5-ft³rigid tank contains saturated refrigerant-134 at 170 psia. Initially, 20 percent of the volume is occupied by liquid and the rest by vapor. A valve at the top of the tank is now opened, and vapor is allowed to escape slowly from the tank. Heat is transferred to the refrigerant such that the pressure inside the tank remains constant. The valve is closed when the last drop of liquid in the tank is vaporized. Determine the total heat transfer for this process. R-134a, Sat. mixture P = 170 psia V = 1.5 ft³
2-64 Nitrogen enters a steady-flow heat exchanger at 150 kPa, 10°C, and 100 m/s, and it receives heat in the amount of 120 kJ/kg as it flows through it. Nitrogen leaves the heat exchanger at 100 kPa with a velocity of 200 m/s. Determine the Mach number of the nitrogen at the inlet and the exit of the heat exchanger.
The same open tank now contains three immersible liquids as shown. Because of the system geometry, piezometer A contains liquid A, piezometer B contains liquid B, and piezometer C contains liquid C. Determine (a) the gage pressure at the interface between liquids A and B, at the interface between liquids B and C, and at the tank bottom; (b) the elevation of the liquid surface in piezometer A; (c) the elevation of the liquid surface in piezometer B; (d) the elevation of the liquid in piezometer C. (e) redraw the sketch and show the liquid to the correct elevation in each tube.
1) A cylinder of volume 50cm made of Pyrex glass is full to the brim with acetone. Suppose the cylinder and acetone are warmed by 30°C. (Coefficient of linear expansion of glass, 3.2 x 10-6K-1 and acetone, 5.0 x 10-5K-1) i. Calculate the change in volume of the glass. ii. Calculate the change in volume of the acetone. ii. Will any acetone spill out of the cylinder? Explain.
1. A Rankine cycle with reheating has a throttle pressure of 135 bars at the turbine inlet and 28 bars reheat pressure, the throttle and reheat temperature of the steam is 550C, condenser pressure is 0.035 bar, mass flow rate of steam is 10 kg/sec. Draw the T-s and schematic diagram of the cycle and determine the following: (c) theoretical thermal efficiency (d) the steam rate (e) heat rate of the cycle
Water is the working fluid in an ideal regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1400 lbf/in.² and 1000°F and expands to 120 lbf/in.2, where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.2 The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lbf/in.² Saturated liquid exits the open feedwater heater at 120 lbf/in.² The net power output of the cycle is 1 x 10³ Btu/h. Determine for the cycle: (a) the mass flow rate of steam entering the first stage of the turbine, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the percent thermal efficiency.
Water is the working fluid in an ideal regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 1200°F and expands to 120 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lbf/in.2 Condensate exiting the feedwater heater as saturated liquid at 120 lbf/in.2 undergoes a throttling process as it passes through a trap into the condenser. The feedwater leaves the heater at 1400 lbf/in.2 and a temperature equal to the saturation temperature at 120 lbf/in.2 The net power output of the cycle is 288 MW. Determine for the cycle:(a) the mass flow rate of steam entering the first stage of the turbine, in lb/h.(b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator.(c) the percent thermal efficiency.
Q4: A. Calculate the pressure of steam at a temperature of 500°C and a density of 24 kg/m³ using (a) the ideal gas equation, (b) the van der Waals equation, (c) the compressibility factor, and (d) the steam table.
4. An ideal vapor-compression heat pump cycle with Refrigerant 134a as the working fluid provides 15 kw to maintain a building at 200°C when the outside temperature is 50°C. Saturated vapor at 2.4 bar leaves the evaporator, and saturated liquid at 8 bar leaves the condenser. Calculate (a) The power input to the compressor, in kW (b) The coefficient of performance. (c) The coefficient of performance of a reversible heat pump cycle operating between thermal reservoirs at 20 and 50°C. (h, = 244.09kJ/kg, s, = 0.9222 kl/kg – K; h2 = 268.97 kJ/ kg; h, = 93.42 kJ/ kg) %3D
A turbine receives steam at the following state: pressure 1200 kPag, enthalpy 2875 kJ/kg, speed 33.3 m/s and elevation 30 m. The steam leaves the turbine at the following state; pressure 20 kPag, enthalpy 2152 kJ/kg, speed 100 m/s and elevation 0 m. Heat is lost to the surroundings at the rate of 29 kJ/s. if the rate of steam flow through the turbine is 0.24 kg/s, what is the power output of the turbine in kW? Assume steady flow conditions. O 598.01 O 112.52 O 143.52 O 165.56
Determine the temperature rise of 20.615°F in the water-cooled condenser in °C.
Air with a mass flow rate of 5 kg/s enters a horizontal nozzle operating at steady state at 450 K, 350 kPa, and velocity of 3 m/s. The nozzle is well insulated. At the exit, pressure is 300 kPa and temperature is 390 K. Using the ideal gas model for air, the area at the inlet is m², and the velocity at the outlet is Are potential effects negligible? Why? m/s. Is heat transfer negligible? Why? Note that you may choose to model the specific heat as constant.

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