A fluid at 700 kPa, with a specific volume of 0.25 m³/kg and a velocity of 175 m/s, enters a device. Heat loss from the device by radiation is 23 kJ /kg. The work done by the fluid is 465 kJ /kg. The fluid exists at 136 kPa, 0.94 m³/kg, and 335 m/s. Find the change in internal energy, in kJ/s.

A fluid at 700 kPa, with a specific volume of 0.25 m³/kg and a velocity of 175 m/s, enters a device. Heat loss from the device by radiation is 23 kJ /kg. The work done by the fluid is 465 kJ /kg. The fluid exists at 136 kPa, 0.94 m³/kg, and 335 m/s. Find the change in internal energy, in kJ/s.

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

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

A fluid at 700 kPa, with a specific volume of 0.25 m³/kg and a velocity of 175 m/s, enters
a device. Heat loss from the device by radiation is 23 kJ /kg. The work done by the fluid
is 465 kJ /kg. The fluid exists at 136 kPa, 0.94 m³/kg, and 335 m/s. Find the change in
internal energy, in kJ/s.

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