Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1600 lb-/in²and 1100°F and expands to 120 lb-/in.², where some of the steam is extracted and diverted to the open feedwater heater operating at120 lb-/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.² Each turbine stageand both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is atconstant pressure. Saturated liquid exits the open feedwater heater at 120 lb-/in.² The mass flow rate of steam entering the first stageof the turbine is 2.42x106 lb/h.Determine the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator.Qin=Btu/h

Given that- Turbine inlet pressure, P1= 1600 lbf/in2 Turbine inlet temperature, T1= 11000F Turbine…

Answered: Water is the working fluid in a…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Determine the average molecular weight of a stream exiting a natural gas fuel reformer containing 15.7 mol% methane, 10.7 mol% water, 5.3 mol% carbon dioxide, 12.3 mol% carbon monoxide, and 56.0 mol% hydrogen.
Water vapor at 5 MPa pressure and 400 C temperature enters a nozzle at a speed of 80 m / s and exits at 2 MPa pressure and 300°C . Flow is continuous. The entrance cross section area of the nozzle is 50 cm2 and there is a heat loss of 120 kJ / s to the environment.a. The mass flow of steamb. The speed of the steamc. Calculate the exit cross-sectional area of the nozzle.
1950 liter/h ethanol at 320 K is pumped in a 35 mm inner diameter pipe through a distance of 150 m in a horizontal direction and then up through a vertical height of 15 m. In a pipe there is a control valve for which the friction loss may be taken as equivalent to 220 pipe diameters and also other pipe fittings equivalent to 60 pipe diameters. Also in the line is a heat exchanger across which there is a loss in head of 2.5 m of CCl4. If the main pipe has a roughness of 0.2 mm, what power must besupplied to the pomp if it is 75 per cent efficient
1
The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.3 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 25 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter pipe length. a. Find the convection coefficient in the pipe = AnswerW / m² ° C. b. Calculate heat loss per meter pipe length = Answerwatt.
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5. A steam power plant operates on the cycle below. Complete the table. -2200.0 kJ/kg Ideal Turbine Work Turbine Efficiency Ideal Pump Work Pump Efficiency 0.75 100.0 kJ/kg 0.80 4000.0 kJ/kg 125 kg/s Boiler Heat Transfer Steam Rate Condenser Heat Transfer Cycle Thermal Efficiency Power Rating (kW)
Please answer only Part E. Show all work and box in final answer. The fluid velocity should be in m/s T1 = 650 degree Celsius T4 = 350 degree Celsius
Water vapor expands at a turbine at a speed of 1350 kg / s, the inlet conditions are 8MPA and 400C, the outlet conditions are 500KPa and 250C, the turbine does 200kW work. Neglect changes in kinetic and potential energy. a) Write and simplify the equation that applies to this system. b) What are the specific enthalpies of the input and output current? c) What is the heat transfer in Kw? d) What is the specific volume and volumetric flow at the inlet? e) What is the specific volume and the volumetric flow at the outlet
A compressor is to compress 5.0 mol/s of air at 20°C and 200 kPa to 800 kPa. The ratio ofconstant pressure to constant volume heat capacity for air is 1.4. Determine the following:a) Power (in kW) required if the mechanical efficiency of the uncooled compressor is 70%.b) Outlet temperature of the uncooled compressor and whether it is safe for operation.c) The percentage of power saved if the compressor were run isothermally.
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