How ac’s work
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Air conditioners work by using an evaporator to receive liquid refrigerant and control its flow to the compressor and condenser. The condenser facilitates heat transfer by removing heat from the surrounding air and transferring it to the refrigerant, changing its state. An expansion valve then regulates the refrigerant flow into the evaporator, which is important for proper AC function. The compressor pressurizes and pumps the refrigerant between the condenser and evaporator, compressing and cooling it in the process.
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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.
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In this power-point presentation, you'll understand the basic concepts & mechanisms of a fridge/refrigerator.
This is a short ppt in simple english language for easy & quick understanding of concepts.
Hope, it'll be helpful to you
THANKYOU :)
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The document summarizes the refrigeration cycle. It describes the four basic processes: (1) isentropic compression in the compressor, (2) constant pressure heat rejection in the condenser, (3) isentropic expansion in the expansion valve/metering device, and (4) constant pressure heat addition in the evaporator. The refrigerant is compressed in the vapor phase, condensed, expanded, and evaporated alternately to provide cooling. Key components are the compressor, condenser, expansion valve, and evaporator. The coefficient of performance (COP) measures efficiency as the cooling effect divided by the work input. Selecting the right refrigerant depends on the application and factors like cost, toxicity, and environmental impact
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Refrigerators and heat pumps transfer heat from a low-temperature medium to a high-temperature medium. They differ only in their objectives - refrigerators remove heat (cooling), while heat pumps supply heat.
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In this power-point presentation, you'll understand the basic concepts & mechanisms of a fridge/refrigerator.
This is a short ppt in simple english language for easy & quick understanding of concepts.
Hope, it'll be helpful to you
THANKYOU :)
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rac k10998 ppt
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Refrigeration 1
This document summarizes key concepts in refrigeration cycles. It defines refrigeration as reducing the temperature below the surroundings and notes that refrigerants, like NH3, are used as working fluids. It explains that the refrigerating effect is the energy removed from the cold chamber and that the coefficient of performance is the ratio of heat removed to work input. The document also discusses refrigerator capacity as the amount of heat transferred per unit time from the cold chamber. It provides an overview of the vapor compression refrigeration cycle and notes modifications to improve efficiency, such as replacing the expansion engine with a throttling valve.
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The document summarizes the basic vapor compression refrigeration cycle. It consists of four main processes: (1) compression of refrigerant vapor in a compressor, (2) condensation of the high-pressure vapor into a liquid in a condenser, (3) expansion of the high-pressure liquid through a throttling valve or expansion device, and (4) evaporation of the low-pressure liquid in an evaporator. The refrigerant absorbs heat from the evaporator and releases heat in the condenser, allowing for transfer of heat from low to high temperature regions. The coefficient of performance (COP) measures the efficiency of the cycle. Proper selection of refrigerant depends on the application.
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i hope, it will helpful to the students and peoples in the search of topics mentioned
it is informative to study to even get passing marks or for revision
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The document discusses the basic refrigeration cycle. It begins by introducing refrigeration as the transfer of heat from a lower to higher temperature region. The most common refrigeration cycle is the vapor compression cycle, where the refrigerant alternates between vaporization and condensation states and is compressed as a vapor. The basic processes of the refrigeration cycle are: (1) compression, (2) heat rejection during condensation, (3) expansion, and (4) heat absorption during evaporation. The cycle is repeated through the compressor. The coefficient of performance is used to measure efficiency. Selection of the right refrigerant depends on the specific application.
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The document discusses the principles of refrigeration and how it works. It begins by defining refrigeration as the process of removing heat from one substance and transferring it to another. It then explains the key concepts of heat, temperature, methods of heat transfer, latent heat, sensible heat, and the refrigeration cycle. Specifically:
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Refrigeration is a process that uses mechanical means to transfer heat from a low-temperature area to a high-temperature area, with applications including household refrigerators and freezers. The introduction of refrigerated rail cars in the 1800s allowed for expanded settlement in the United States by making it possible to transport perishable goods. Early Americans began using ice harvested in winter to refrigerate foods in the 1830s as iceboxes became more widely available. A refrigerator operates by using a vapor-compression refrigeration cycle with four main components - a compressor, condenser, expansion valve, and evaporator - to absorb heat from the refrigerated interior and release it to the exterior environment.
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This document is a presentation about the effects of parameters on a vapor compression refrigeration system (VCRS). It introduces VCRS and its fundamental processes of compression, condensation, and expansion. It then shows these processes on a pressure-enthalpy chart. Finally, it discusses the effects of varying the suction pressure, delivery pressure, degree of superheating, and liquid subcooling. Increasing delivery pressure and superheating increases refrigerating effect but also increases work. Subcooling increases refrigerating effect without extra energy if no further cooling is needed.
rac k10998 ppt
Vapour compression refrigeration cycle uses four main components - a compressor, condenser, expansion valve, and evaporator. The refrigerant is compressed into a hot, high-pressure gas (1-2), condensed into a liquid in the condenser (2-3), expanded through the throttle valve into a cold, low-pressure liquid-vapour mixture (3-4), and evaporated in the evaporator (4-1) to complete the cycle. The coefficient of performance (COP), a measure of efficiency, is calculated as the refrigeration effect divided by the work input. Increasing the evaporator or condenser pressure decreases COP, while superheating may increase or decrease COP depending on the refrigerant
Refrigeration and Heat Pump Systems
The document discusses the vapor-compression refrigeration cycle. It describes the four main processes: evaporation in the evaporator, compression in the compressor, condensation in the condenser, and expansion through the expansion valve. Idealizations made in the engineering model are described. Mass and energy balances are applied to each component to analyze performance parameters like refrigeration capacity and COP. Sources of irreversibility that reduce the actual COP relative to the Carnot COP are discussed. Other refrigeration cycles like cascade and multipurpose systems are mentioned. Factors in selecting refrigerants including performance, safety, and environmental impact are summarized.
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
This document summarizes a seminar presentation on vapour compression refrigeration. It describes the basic process of refrigeration, the key components of a refrigeration system including the evaporator, compressor, condenser and expansion valve. It then explains the vapour compression refrigeration cycle in four steps: 1) low pressure liquid refrigerant absorbs heat in the evaporator and changes to a gas, 2) the gas is compressed to high pressure in the compressor, 3) the high pressure gas is cooled and condensed in the condenser, 4) the liquid passes through an expansion device where its pressure is reduced before entering the evaporator again. The document concludes by listing some advantages and disadvantages of vapour compression refrigeration.
Working of Refrigerator and its principle.
The refrigerator works by using a refrigeration cycle that involves important components like a compressor, condenser, throttling device, and evaporator. The refrigerant is compressed into a hot, high-pressure gas and passed through the condenser, where it cools and condenses into a liquid. The liquid refrigerant then passes through the throttling device, where it undergoes an abrupt drop in pressure and temperature and turns into a cold, low-pressure liquid. This cold liquid is circulated through the evaporator coils inside the refrigerator, where it absorbs heat from the inside of the refrigerator and evaporates back into a gas, cooling the inside. The gas is then drawn back into the compressor to repeat the cycle.
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
This document summarizes the key aspects of vapour compression refrigeration. It discusses how refrigeration works by extracting heat from a substance using an external work input. Vapour compression refrigeration uses a refrigerant in a closed loop system consisting of an evaporator, compressor, condenser and expansion valve. The refrigerant absorbs heat in the evaporator and rejects heat in the condenser, with the compressor raising the refrigerant's pressure and temperature between these components. This creates a temperature difference that drives heat transfer from the evaporator to the condenser. The document outlines the refrigeration cycle and components in more detail. It also discusses coefficient of performance, units of refrigeration, advantages and disadvantages of vapour compression systems.
Refrigeration cycle
The document discusses the ideal and actual vapor-compression refrigeration cycles. The ideal cycle involves reversible processes while the actual cycle accounts for irreversibilities in components. Several refrigerants are discussed for use in refrigeration systems, with factors like ozone depletion and global warming potential considered in selection. Heat pumps are also covered, with air, water, and ground-source systems compared for heating and cooling applications.
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This document summarizes a seminar presentation on vapor compression refrigeration. It describes the basic principles of refrigeration, including defining refrigeration as the removal of heat from a substance at a lower temperature than its surroundings. It then explains the key components and process of a vapor compression refrigeration system, including the evaporator, compressor, condenser, and expansion valve. The document also discusses units of refrigeration, coefficient of performance, advantages and disadvantages of vapor compression refrigeration.
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Vapor-compression refrigeration – Effect of parameter
Vapor-compression refrigeration – Effect of parameter
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Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
Vapourcompressionrefrigeration 140614054320-phpapp02 (1)
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How ac’s work
- 2. Evaporator • Receives the liquid refrigerant • It controls the flow of the refrigerant from the compressor and the condenser
- 3. Condenser • Facilitates heat transfer • The condenser transfers the heat from the surrounding to the refrigerant. • Changing the states of the refrigerant
- 4. Expansion Valve • regulates refrigerant flow into the evaporator • This control of flow is important • Too much or too little flow of refrigerant and the AC will not work
- 5. Compressor • A pump that pressurizes refrigerant • As the name suggests the compressor, compresses the refrigerant into the condenser and the evaporator. • Cooling it in the process