/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} 11Q Question:The COPs are defined di... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 15: 11Q (page 412)

Question:The COPs are defined differently for heat pumps and air conditioners. Explain why.

Short Answer

Expert verified

The COP of the heat pump is as follows:

\(COP = \frac{{{Q_{\rm{H}}}}}{W}\)

The COP of the air conditioners is as follows:

\(COP = \frac{{{Q_{\rm{L}}}}}{W}\)

Step by step solution

01

Coefficient of performance (COP)

The term coefficient of performance describes the effectiveness of a certain device like heat pump or refrigerator at transferring rate and the quantity of power consumed by the device.

02

Explaining the difference in COP of heat pumps and air conditioners

The relation of COP of the heat pumps is given by:

\(COP = \frac{{{Q_{\rm{H}}}}}{W}\)

The coefficient of performance of the heat pump relies on the amount of heat delivered. The main objective of this device is to heat instead of cool. In order to make the working of the heat pump better, more heat should be delivered per amount of input work.

The relation of COP of theair conditionersis given by:

\(COP = \frac{{{Q_{\rm{L}}}}}{W}\)

The coefficient of performance of the air conditioners relies on the amount of heat removed from the reservoir. The main objective of this device is cooling instead of heating.

In order to make the working of the air conditioners better, increase the amount of heat extracted per amount of input work.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

(II) Sketch a PV diagram of the following process: 2.5 L of ideal gas at atmospheric pressure is cooled at constant pressure to a volume of 1.0 L, and then expanded isothermally back to 2.5 L, whereupon the pressure is increased at constant volume until the original pressure is reached.

Would a definition of heat engine efficiency as \(e = \frac{W}{{{Q_{\rm{L}}}}}\) be useful? Explain.

Question:You are asked to test a machine that the inventor calls an 鈥渋n-room air conditioner鈥�: a big box, standing in the middle of the room, with a cable that plugs into a power outlet. When the machine is switched on, you feel a stream of cold air coming out of it. How do you know that this machine cannot cool the room?

Question: Living organisms, as they grow, convert relatively simple food molecules into complex structures. Is this a violation of the second law of thermodynamics? Explain your answer.

Which of the following possibilities could increase the efficiency of a heat engine or an internal combustion engine?

(a)Increase the temperature of the hot part of the system and reduce the temperature of the exhaust.

(b) Increase the temperatures of both the hot part and the exhaust part of the system by the same amount.

(c) Decrease the temperatures of both the hot part and the exhaust part of the system by the same amount.

(d) Decrease the temperature of the hot part and increase the temperature of the exhaust part by the same amount.

(e) None of the above; only redesigning the engine or using better gas could improve the engine's efficiency.
See all solutions

Recommended explanations on Physics Textbooks

Waves Physics

Read Explanation

Engineering Physics

Read Explanation

Radiation

Read Explanation

Modern Physics

Read Explanation

Magnetism

Read Explanation

Measurements

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.