thermodynamic property of Refrigerator
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The document discusses the thermodynamic properties of refrigerators. It describes the key components of a refrigerator - the compressor, condenser, expansion valve, and evaporator. It explains how each component works and how refrigeration is achieved through the phase change of refrigerants. Specifically, the refrigerant is compressed and condensed in the compressor and condenser, expanded through a throttling device, and evaporated in the evaporator, absorbing heat from the refrigerator. The coefficient of performance is introduced as a measure of a refrigerator's effectiveness. Applications of refrigeration like ice manufacturing and food preservation are also listed.
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This document provides information about refrigeration systems prepared by students at ARRDEKTA Institute of Technology under the guidance of professors Y.R. Sharma and P.K. Patel. It describes refrigeration as the process of removing heat from a substance under controlled conditions to maintain its temperature below surroundings. The key components of a vapor compression refrigeration system are discussed, including the compressor, condenser, expansion valve, and evaporator. Vapour compression refrigeration is noted as the most important system for commercial and domestic use due to its efficiency and practicality.
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This document provides information about refrigeration systems prepared by students at ARRDEKTA Institute of Technology under the guidance of professors Y.R. Sharma and P.K. Patel. It describes refrigeration as the process of removing heat from a substance under controlled conditions to maintain its temperature below surroundings. The key components of a vapor compression refrigeration system are discussed, including the compressor, condenser, expansion valve, and evaporator. Vapour compression refrigeration is noted as the most important system for commercial and domestic use due to its efficiency and practicality.
Refrigeration system.ppt
This document provides information about refrigeration systems prepared by students at ARRDEKTA Institute of Technology under the guidance of professors Y.R. Sharma and P.K. Patel. It defines refrigeration as the process of removing heat from a substance under controlled conditions to maintain its temperature below surroundings. The key components and processes of a vapor compression refrigeration system are described, including the compressor, condenser, expansion valve, and evaporator. Vapour compression is identified as the most important and practical refrigeration system used commercially and domestically.
Refrigeration cycle
The document summarizes the refrigeration cycle and vapor compression refrigeration system. The refrigeration cycle involves compressing a refrigerant gas, condensing it in a condenser to release heat, expanding the liquid refrigerant which causes it to evaporate and absorb heat, and circulating the cold gas back into the refrigerator. The vapor compression system uses this cycle, with the main components being a compressor, condenser, expansion valve, and evaporator. The compressor increases the refrigerant's pressure and temperature, the condenser cools and condenses it, releasing heat, the expansion valve reduces the pressure and temperature causing evaporation, and the evaporator absorbs heat during evaporation to cool its surroundings.
Refrigeration system
Vapor compression refrigeration cycle, Refrigerants,
Coefficient of performance, Capacity, Factors affecting Refrigeration and Air conditioning
system performance and savings opportunities.
Vapor absorption refrigeration system: Working principle, Types and comparison with
vapor compression system, Saving potential
سمنار الثرمو النهائي 2023 THYROMDYNAMIC.pptx
The document discusses the vapor compression refrigeration cycle. It operates by using a refrigerant that alternately vaporizes and condenses. As a liquid, it absorbs heat during evaporation, and as a gas it releases heat during condensation. The ideal vapor compression cycle involves isentropic compression, constant pressure heat rejection, throttling through an expansion valve, and constant pressure heat addition. The cycle uses a compressor, condenser, expansion valve, and evaporator to transfer heat from a low temperature region to a higher one. The efficiency of refrigerators and heat pumps is expressed through the coefficient of performance.
ref.pdf
This document discusses refrigeration and its various applications and methods. It begins by defining refrigeration as the process of achieving and maintaining a temperature below surroundings through the removal of heat. The main types of refrigeration are then listed as domestic, commercial, industrial, marine, air conditioning, and food preservation. Various natural and early mechanical refrigeration techniques are described, such as the use of icehouses and evaporative cooling. The ideal vapor compression refrigeration cycle is explained through its four processes. Absorption refrigeration using ammonia-water and lithium bromide-water systems is also summarized. Compressor types including reciprocating, rotary, and centrifugal are defined. Key refrigeration system components and their functions are outlined.
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thermodynamic property of Refrigerator
- 1. THERMODYNAMIC PROPERTIES OF REFRIGERATOR ADVISED BY :- DR. RAMA GAUR • KRISHNANAND KUSHWAHA • VIVEK SHUKLA SCHOOL OF CHEMICAL ENGINEERING AND PHYSICAL SCIENCES, LOVELY PROFESIONAL UNIVERSITY, JALANDHAR (PUNJAB) 1
- 3. INTRODUCTION the mechanism used for lowering or producing low temperature in a body or a space whose temperature is already below the temperature of its surrounding is called the refrigeration system. 3
- 4. Components of Refrigerator & Working 4
- 5. 1. Compressor Compressor is the heart of the refrigeration system. The power required for transmitting heat from low temperature space to high temperature space is given here. When refrigerant passes through a compressor it gets highly compressed i.e. pressurized and its temperature also becomes very LOW. As it leaves the compressor, refrigerant gets converted into the gaseous state. . 5
- 6. 2. Condenser This heat exchanger is fitted outside the refrigerator, and the refrigerant temperature is higher than atmospheric temperature. So heat will dissipate to the surroundings. The vapor will be condensed to liquid, and the temperature will return to a normal level. 6
- 7. 3. Expansion Valve or Throttling Device The throttling device obstructs the flow of liquid; cold liquid is produced with the help of this device. In this case, the throttling device is a capillary tube. The capillary tube has an approximate length of 2 m and an inside diameter of around 0.6 mm, so it offers considerable resistance to the flow. 7
- 8. 4. Evaporator - Heat Absorption Process The next phase is simple: this cold liquid is passed over the body that has to be cooled. As a result, the refrigerant absorbs the heat. During the heat absorption process, the refrigerant further evaporates and transforms into pure vapor. A proper heat exchanger is required to carry the cold refrigerant over the body. This heat exchanger is known as an evaporator. 8
- 9. Refrigerants any substance which is capable of absorbing heat from another required substance can be used as refrigerant. i.e. ice, water, brine, air, etc. 9
- 10. THE BASIC PRINCIPLE OF REFRIGERATION Refrigeration process works on the principle of second law of thermodynamics. The Second Law of Thermodynamics essentially states that if a cold object is placed next to a hot object, the cold object will become warmer and the hot object will become cooler. 10
- 11. COEFFICIENT OF PERFORMANCE(COP) it is the measure of effectiveness of refrigeration system. it is the ratio of refrigerating effect(Q) to the input work (W) required to produce the effect. COP= refrigerating effect input work COP= 𝑸 𝑾 11
- 12. THERMODYNAMICS OF REFRIGERATION SINK T1 REFRIGERATO SOURCE T2 WORK (w) Q1 Q2 T1 < T2 Coefficient Of Performance(COP)=Q1/W For refrigerator maximum Q1 should be taken out with minimum expense of W, so performance of refrigeration will be good. 12
- 13. 13
- 14. APPLICATION Ice manufacturing Dehumidification of air. Separation of gases. Solidification of a solute. Removal of Heat of Reaction. Preservation of Dairy Products. Beverages. 14
- 15. 15