Transfer Phenomena Question A steam turbine produces 1000 hp at its shaft output. Superheated steam enters the turbinethrough a 3-inch ID pipe at a temperature T1 = 1200°F, a pressure of P1 = 380 psia, a specificenthalpy of hi = 1631.6 Btu/lbm, and a velocity of vI = 100 ft/s. The superheated steam leavesthe turbine at a specific enthalpy of h2 = 1238.1 Btu/lbm and a velocity of v2 = 300 ft/s. Thedischarge line is 10 ft below the entrance line. Assume that the turbine operates adiabaticallyand steam behaves as an ideal gas. Determine the power lost to friction in the bearings of theturbine.%D

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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

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Transfer Phenomena Question

A steam turbine produces 1000 hp at its shaft output. Superheated steam enters the turbine
through a 3-inch ID pipe at a temperature T1 = 1200°F, a pressure of P1 = 380 psia, a specific
enthalpy of hi = 1631.6 Btu/lbm, and a velocity of vI = 100 ft/s. The superheated steam leaves
the turbine at a specific enthalpy of h2 = 1238.1 Btu/lbm and a velocity of v2 = 300 ft/s. The
discharge line is 10 ft below the entrance line. Assume that the turbine operates adiabatically
and steam behaves as an ideal gas. Determine the power lost to friction in the bearings of the
turbine.
%D

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A pipeline laid cross country carries oil at the rate of Q = 795 m3
/d. The pressure of the oil is
P1 = 1793 kPa gage leaving pumping station 1. The pressure is P2 = 862 kPa gage at the inlet
to the next pumping station, 2. The second station is 17.4 m higher than the first station.
Calculate the frictional loss (ghL ) in J/kg. The oil density is ρ = 769 kg/m3
.

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