Answered: Goal Solve for the performance…

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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Question

Goal Solve for the performance coefficient of a refrigerator using a five-step process the includes:
1. Making a state table.
2. Making a process table.
3. Calculating the totals for Work, Heat, and Internal-Energy-Change.
4. Identifying the heat input (cold reservoir) and output (hot reservoir).
5. Calculating the performance coefficient of the refrigerator.

Problem Shown in the figure to the right is a cyclic process undergone by a refrigerator. Your refrigerator shall use 5.0 moles of helium gas (monatomic). During the process a->b, the volume increases by a factor of 3.0.

Solution-

(1) Fill in the State Table (all pressures in Pascals, all volumes in cubic meters, all temperatures in K).

	Pressure	Volume	Temperature
a
b
c

(2) Fill in the Process Table (all entries in Joules).

	Work	Heat	dU
a->b
b->c
c->a

(3) Find the Totals:

Work =	J
Heat =	J
dU =	J

(4) Find the heat input (from "cold reservoir") and the heat output (to "hot reservoir"):

Q-hot =	J
Q-cold =	J

(5) Find the performance coefficient of the refrigerator:

Coefficient =

Solution
(1) Fill in the State Table (all pressures in Pascals, all
volumes in cubic meters, all temperatures in K).
(2) Fill in the Process Table (all entries in Joules).
(3) Find the Totals:
(4) Find the heat input (from "cold reservoir") and
the heat output (to "hot reservoir"):
(5) Find the performance coefficient of the
refrigerator:
a
b
с
Pressure
a->b
b->c
c->a
Work
Work =
Heat =
dU =
Q-hot
Q-cold
=
=
Coefficient =
Volume
Heat
J
J
J
J
Temperature
du

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Can I get the clear format solution for part 2 table (work, heat, du)

and du for part 3 table

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