Mechanical Engineering Exam > Mechanical Engineering Notes > Mechanical Engineering SSC JE (Technical) > Vapour Compression Cycle
Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical) PDF Download
VAPOUR COMPRESSION CYCLE
If in a Reversed Carnot Cycle
- Refrigerant is compressed from dry saturated condition.
- Expander is replaced by a throttling device.
The modified cycle is vapour compression cycle with no draw back of reversed carnot cycle with vapour as refrigerant
- Refrigerant circulation rate
- Volume of suction vapour = m& V1
V1 – Specific volume of the vapour at suction
- Actual piston displacement volume of compressor
hv = volumetric efficiency of compressor - Power consumption of compressor
- Heat rejected in the condenser
- The superheat discharge temperature is found by
- Refrigerating effect = (h1 - h4 ) = Q0
- In case of R - 11, R - 22 and Ammonia system, wet suction state leads to maximum COP, for all other refrigerants system. suction from super heated state gives maximum COP,
hv = volumetric efficiency of compressor
(h1 - h4 ) = Q0Actual vapour compression system has following deviation from simple VCC.
(i) Superheating of vapour in evaporator.
(ii) Heat gain and superheating of vapour in suction line.
(iii) Pressure drop in suction line
(iv) Polytropic compression instead of isentropic compression due to friction.
(v) Pressure drop at discharge valve.
(vi) pressure drop in condenser and evaporator.
(vii) Subcooling of liquid in condenser and heat gain in liquid line.
EFFECT OF OPERATING CONDITIONS ON COP OF PAOUR COMPRESSION CYCLE.
Effect of Decrease in Evaporator Pressure
- Decrease in refrigerating effect
- Increases in specific volume of suction vapour
- Decease in Volumetric efficiency of compressor due to increase in pressure ratio.
- Increase in compressor work
Effect of Increase in Condenser Pressure
- Deceases in Refrigerating effect
- Increase in compressor work
- Decrease in volumetric efficiency of compressor
- Increase in mass flow of refrigerant.
- COP decreases with both decreasing evaporator pressure and increasing compressor pressure. Effect of decreasing evaporator pressure is more on hte decrease in COP than the effect of increase in condenser pressure by same account.
Effect of suction Vapour Superheat
- Increase in Refrigerating effect
- Increase in specific volume of suction vapour
- Increase in compressor work.
- It ensures complete vaporization of liquid before entering compressor.
- For R - 12, suction vapour superheat increases the COP.
- For R-22 & ammonia system, suction vapour super heat decreases the COP.
Effect of Liquid subcooling
- Increase in refrigerating effect
- Compressor work is same & COP in creases
If Energy Gained by Subcooling is Utilized in super Heating the Suction Vapour
- For R-12, work per TR is decreased and COP increases.
- For R-22 Ammonia, work per TR increases & COP decreases.
- There is large pressure drop in evaporator and very less drop in condenser. So pressure drop in evaporator is very critical in design.
The document Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical) is a part of the Mechanical Engineering Course Mechanical Engineering SSC JE (Technical).
All you need of Mechanical Engineering at this link: Mechanical Engineering
|
5 videos|103 docs|59 tests
|
FAQs on Vapour Compression Cycle - Mechanical Engineering SSC JE (Technical)
| 1. What is a vapour compression cycle in mechanical engineering? |  |
Ans. A vapour compression cycle is a thermodynamic process used in mechanical engineering to transfer heat from a lower temperature source to a higher temperature sink by using a refrigerant. It is commonly used in refrigeration and air conditioning systems to cool or heat spaces or substances.
| 2. How does a vapour compression cycle work? | |
Ans. In a vapour compression cycle, the refrigerant undergoes a series of processes. First, it is compressed in a compressor, increasing its pressure and temperature. Then, it passes through a condenser where it releases heat to the surroundings and changes from a gas to a liquid. The liquid refrigerant then flows through an expansion valve, reducing its pressure and temperature. Finally, it enters the evaporator where it absorbs heat from the surroundings and evaporates back into a gas. This cycle repeats to maintain the desired cooling or heating effect.
| 3. What are the components of a vapour compression cycle? | |
Ans. A vapour compression cycle consists of several key components. These include a compressor, condenser, expansion valve, and evaporator. The compressor is responsible for raising the pressure and temperature of the refrigerant. The condenser allows the refrigerant to release heat and condense into a liquid. The expansion valve lowers the pressure and temperature of the liquid refrigerant before it enters the evaporator. The evaporator absorbs heat from the surroundings, causing the refrigerant to evaporate and complete the cycle.
| 4. What are the advantages of a vapour compression cycle? | |
Ans. The vapour compression cycle offers several advantages in mechanical engineering applications. Firstly, it provides efficient heat transfer, allowing for effective cooling or heating. It also allows for precise temperature control and can be easily adjusted to meet varying demands. Additionally, the cycle is reliable and widely used, with established design guidelines and readily available components. Finally, the use of refrigerants in the cycle makes it environmentally friendly compared to other cooling or heating methods.
| 5. What are the limitations of a vapour compression cycle? | |
Ans. While the vapour compression cycle is widely used, it does have some limitations. One limitation is the need for a constant power supply to operate the compressor. This can be a drawback in remote or off-grid locations. Another limitation is the potential for refrigerant leakage, which can contribute to environmental concerns. Additionally, the cycle may not be suitable for certain extreme temperature conditions or for applications requiring very low temperatures. Proper maintenance and design considerations are necessary to mitigate these limitations.
Related Exams
About this Document
|
2.5K Views |
|
4.63/5 Rating |
|
Dec 26, 2024 Last updated |
Document Description: Vapour Compression Cycle for Mechanical Engineering 2024 is part of Mechanical Engineering SSC JE (Technical) preparation.
The notes and questions for Vapour Compression Cycle have been prepared according to the Mechanical Engineering exam syllabus. Information about Vapour Compression Cycle covers topics
like and Vapour Compression Cycle Example, for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Vapour Compression Cycle.
Introduction of Vapour Compression Cycle in English is available as part of our Mechanical Engineering SSC JE (Technical)
for Mechanical Engineering & Vapour Compression Cycle in Hindi for Mechanical Engineering SSC JE (Technical) course.
Download more important topics related with notes, lectures and mock test series for Mechanical Engineering
Exam by signing up for free. Mechanical Engineering: Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical)
Description
Full syllabus notes, lecture & questions for Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical) - Mechanical Engineering | Plus excerises question with solution to help you revise complete syllabus for Mechanical Engineering SSC JE (Technical) | Best notes, free PDF download
Information about Vapour Compression Cycle
In this doc you can find the meaning of Vapour Compression Cycle defined & explained in the simplest way possible. Besides explaining types of
Vapour Compression Cycle theory, EduRev gives you an ample number of questions to practice Vapour Compression Cycle tests, examples and also practice Mechanical Engineering
tests
|
5 videos|103 docs|59 tests
|
Download as PDF
|
Explore Courses for Mechanical Engineering exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Semester Notes
,Sample Paper
,video lectures
,past year papers
,Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical)
,Summary
,MCQs
,Viva Questions
,Objective type Questions
,study material
,shortcuts and tricks
,Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical)
,Exam
,Free
,Important questions
,Vapour Compression Cycle | Mechanical Engineering SSC JE (Technical)
,practice quizzes
,mock tests for examination
,Previous Year Questions with Solutions
,Extra Questions
,ppt
;
Additional Information about Vapour Compression Cycle for Mechanical Engineering Preparation
Vapour Compression Cycle Free PDF Download
The Vapour Compression Cycle is an invaluable resource that delves deep into the core of the Mechanical Engineering exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Vapour Compression Cycle now and kickstart your journey towards success in the Mechanical Engineering exam.
Importance of Vapour Compression Cycle
The importance of Vapour Compression Cycle cannot be overstated, especially for Mechanical Engineering aspirants.
This document holds the key to success in the Mechanical Engineering exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Vapour Compression Cycle Notes
Vapour Compression Cycle Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Vapour Compression Cycle.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Vapour Compression Cycle Notes on EduRev are your ultimate resource for success.
Vapour Compression Cycle Mechanical Engineering Questions
The "Vapour Compression Cycle Mechanical Engineering Questions" guide is a valuable resource for all aspiring students preparing for the
Mechanical Engineering exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Vapour Compression Cycle on the App
Students of Mechanical Engineering can study Vapour Compression Cycle alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Vapour Compression Cycle,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Vapour Compression Cycle is prepared as per the latest Mechanical Engineering syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup