Heat exchanger
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Heat exchangers transfer heat between two fluids without mixing them. They are classified based on their transfer process, number of fluids, construction, and flow arrangement. Direct transfer heat exchangers allow simultaneous flow of hot and cold fluids separated by a wall, while storage heat exchangers alternately flow hot and cold fluids through a porous matrix that stores and transfers heat. Direct contact heat exchangers have no separation between fluids, instead bringing a gas and liquid directly in contact by bubbling or spraying.
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Functional Design of Heat Exchanger
This document provides an overview of the functional design of two types of heat exchangers: shell and tube heat exchangers and plate heat exchangers. It discusses the key components, design considerations, and step-by-step design procedures for shell and tube heat exchangers. These include determining the heat transfer area, number of tubes, tube dimensions, baffle design, and accounting for pressure drops and fouling factors. It also introduces plate heat exchangers and discusses their mechanical characteristics and design methods at a high level.
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This document provides an overview of different types of heat exchangers. It begins with an introduction to heat exchangers and their basic functions. It then describes several common types of heat exchangers including recuperators, regenerators, plate heat exchangers, shell and tube heat exchangers, and fin tube heat exchangers. It also discusses potential problems with heat exchangers such as fouling and corrosion and provides some precautions and considerations for heat exchanger design and cost.
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Heat Exchange
Heat exchangers transfer heat between two or more fluids. There are three main types: direct transfer, storage, and direct contact. Direct transfer type heat exchangers simultaneously flow hot and cold fluids through a separating wall. Storage type heat exchangers alternately flow hot and cold fluids through a porous matrix. Direct contact type heat exchangers do not separate the fluids. Common examples are plate heat exchangers and shell-and-tube heat exchangers. Design considerations include materials, operating parameters, fouling factors, and determining the required heat transfer area.
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Here are the key steps to solve this problem:
1. Draw a schematic of the system and define the parameters. You have a pipe with water flowing through it at a rate of 0.15 kg/s. The inlet temperature is 20°C and desired outlet temperature is 50°C.
2. Write the energy balance equation:
Rate of heat transfer into the water = Rate of increase of thermal energy of water
Q = mCpΔT
Where:
Q = Rate of heat transfer (W)
m = Mass flow rate (0.15 kg/s)
Cp = Specific heat of water (4.18 kJ/kg-K)
ΔT = Increase in
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Here are the key steps to solve this problem:
1. Draw a schematic of the system and define the parameters. You have a pipe with water flowing through it at a rate of 0.15 kg/s. The inlet temperature is 20°C and desired outlet temperature is 50°C.
2. Write the energy balance equation:
Rate of heat transfer into the water = Rate of increase of thermal energy of water
Q = mCpΔT
Where:
Q = Rate of heat transfer (W)
m = Mass flow rate (0.15 kg/s)
Cp = Specific heat of water (4.18 kJ/kg-K)
ΔT = Increase in
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Heat exchangers
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3. A typical double pipe heat exchanger basically consists of a tube or pipe fixed concentrically inside a larger pipe or tube They are used when flow rates of the fluids and the heat duty are small (less than 5 kW) These are simple to construct, but may require a lot of physical space to achieve the desired heat transfer area.
4. Double-pipe exchangers is the generic term covering a range of jacketed 'U' tube exchangers normally operating in countercurrent flow of two types which is true double pipes and multitubular hairpins. One fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes. Two types of flow arrangement: Parallel flow Counter flow
5. • The fluids may be separated by a plane wall but more commonly by a concentric tube (double pipe) arrangement shown in fig. If both the fluids move in the same direction, the arrangement is called a parallel flow type. In the counter flow arrangement the fluids move in parallel but opposite directions. In a double pipe heat exchanger, either the hot or cold fluid occupies the annular space and the other fluid moves through the inner pipe. The method of solving the problem using logarithmic mean temperature difference is typical and more iteration must be done. So it takes more time for the problem to solve. Therefore another method is practiced for solving this type of problems. This method is known as Effectiveness and Number of Transfer Units or simply ε-NTU method.“Effectiveness of heat exchangers is defined as actual heat transfer rate by maximum possible heat transfer rate”.The LMTD method may be applied to design problems for which the fluid flow rates and inlet temperatures, as well as a desired outlet temperature, are prescribed.
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A heat exchanger transfers heat between two fluids through conduction. It can transfer heat between fluids that never mix by using a solid wall, or between directly contacted fluids. Heat exchangers are widely used in applications like HVAC, power plants, refineries, and manufacturing. They are classified based on construction and flow configuration, with shell-and-tube and plate heat exchangers being most common. Proper design considers factors like heat transfer rate, pressure drop, fouling, and effectiveness.
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Heat exchangers transfer heat from one fluid to another. There are two main types: tube-and-shell and plate. Tube-and-shell consists of tubes in a shell where fluids flow inside and outside the tubes. Plate heat exchangers use plates to separate fluids which flow between plates in alternating channels. Heat exchangers can operate in parallel, counter, or cross flow configurations. Performance tests determine the overall heat transfer coefficient and identify any fouling issues.
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HEAT EXCHANGERS. Heat exchangers are devices that facilitate the exchange of heat between two fluids that are at different temperature while keeping them from mixing with each other.
2. Double Pipe Heat Exchangers
3. A typical double pipe heat exchanger basically consists of a tube or pipe fixed concentrically inside a larger pipe or tube They are used when flow rates of the fluids and the heat duty are small (less than 5 kW) These are simple to construct, but may require a lot of physical space to achieve the desired heat transfer area.
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Heat exchanger
A heat exchanger transfers heat from one medium to another without allowing the two media to mix. Heat naturally flows from higher to lower temperatures, so a heat exchanger brings two fluids of different temperatures into close contact while preventing mixing. Common applications include heating, cooling, and industrial processes. Key factors that impact heat transfer include material properties, surface area, flow rates, and temperature differences of the fluids. Heat exchangers are classified based on flow patterns, such as parallel, counter, and cross flow designs. The rate of heat transfer depends on the overall heat transfer coefficient, surface area, and log mean temperature difference between the fluids.
Heat Exchangers
Heat exchangers allow the transfer of heat between two fluids without direct contact. The main types are shell-and-tube, plate, air-cooled, and spiral. Shell-and-tube exchangers consist of tubes in a shell and are the most common, used across many industries. Plate exchangers use corrugated plates clamped together with gaskets to direct fluid flow. Spiral and air-cooled exchangers provide alternatives for applications where fouling is a problem.
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Heat exchangers
Heat exchangers transfer heat between two or more fluids that are at different temperatures. They work by bringing the fluids into thermal contact through a conducting surface while preventing mixing. There are several types of heat exchangers classified by their heat exchange process, fluid flow direction, mechanical design, and physical state. A common type is the shell and tube heat exchanger, which consists of a shell with a bundle of tubes inside. One fluid flows through the tubes while another flows over the tubes to transfer heat between the fluids. Double pipe heat exchangers are a simpler design with one pipe inside a larger pipe, allowing fluids to flow within and between the pipes.
heat exchanger
A heat exchanger transfers heat between two fluids through conduction. It can transfer heat between fluids that never mix by using a solid wall, or between directly contacted fluids. Heat exchangers are widely used in applications like HVAC, power plants, refineries, and manufacturing. They are classified based on construction and flow configuration, with shell-and-tube and plate heat exchangers being most common. Proper design considers factors like heat transfer rate, pressure drop, fouling, and effectiveness.
Heat exchangers
This document discusses heat exchangers, including their types, advantages, disadvantages, and applications. It describes the main types of heat exchangers as shell and tube, double pipe, plate type, and finned tube. Shell and tube heat exchangers are the most widely used due to their lower cost compared to plate type and ability to handle higher pressures than double pipe. Plate type heat exchangers offer higher efficiency but higher initial cost. Heat exchangers are commonly used in chemical, petrochemical, food, and other industrial processes to transfer heat between fluids.
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Heat exchangers transfer heat between two or more fluids and are widely used in applications like refrigeration, air conditioning, and chemical processing. There are various types of heat exchangers including shell and tube, which consists of tubes bundled together inside a cylindrical shell. Heat is transferred as fluids flow through the tubes and over the tubes in the shell. Selection of a heat exchanger depends on factors like process requirements, operating conditions, maintenance needs, and cost effectiveness.
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This document discusses different types of heat exchangers used in food processing. It begins by defining heat exchangers and their purpose in food processing applications such as heating, cooling, and heat exchange between food streams. The main types discussed include plate heat exchangers, scraped surface heat exchangers, double pipe heat exchangers, multiple pass heat exchangers, and tubular heat exchangers. Key differences between types include direct contact vs non-contact heat transfer and flow configurations like co-current vs counter-current. Advantages and uses of each type are also summarized.
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This document provides an overview of topics related to heat and mass transfer, including:
- Fins and their applications (Unit I)
- Convection boundary layer concepts including velocity and thermal boundary layers (Unit II)
- Heat exchangers including concentric tube, cross flow, and shell and tube designs (Unit III)
- Boiling and condensation processes including boiling curves and regimes (Unit IV)
- Mass transfer concepts and analogies to heat transfer including diffusion, convection, and concentration boundary layers (Unit V)
It defines key terms and concepts for each topic and provides illustrations of processes like boundary layer development, boiling curves, and mass transfer mechanisms like diffusion and convection.
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1) Heat exchangers are devices that transfer thermal energy between two or more fluids without mixing the fluids. They are commonly used in industries like petroleum refining, power plants, and HVAC systems.
2) Heat exchangers can be classified based on fluid flow patterns (parallel, countercurrent, crossflow) and heat transfer methods. Countercurrent flow is the most efficient as it produces the highest temperature changes in each fluid.
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Heat Exchanger and Its Types.pptx
Heat exchangers are devices that facilitate the exchange of heat between two fluids that are at different temperatures while keeping them from mixing with each other.
The primary purpose of a heat exchanger is to either cool down or heat up a fluid, depending on the specific application.
Two fluids, a hot fluid and a cold fluid, flow through the heat exchanger in separate channels.
The hot fluid transfers heat to the cold fluid through the walls of the heat exchanger channels.
The hot fluid exits the heat exchanger at a lower temperature, and the cold fluid exits the heat exchanger at a higher temperature.
Parts :
Shell: The shell is the outer housing or casing of the heat exchanger.
Tubes: The tubes are the inner passages through which one of the fluids flows.
Tube sheet: The tube sheet is a flat plate that holds the tubes in place within the shell.
Baffles: Baffles are used to direct the flow of fluid through the tubes and to increase the heat transfer surface area.
Nozzles: Nozzles are the openings that allow the fluids to enter and exit the heat exchanger.
Heat exchangers
Heat exchangers
TUBE AND SHELL
PLATE HEAT EXCHANGER
FLOW OF ARRANGEMENT
REGENERATIVE HEAT EXCHANGER
log mean temperature difference (LMTD)
Number of Transfer Units (NTU) Method
EFFECTIVENESS OF HEAT EXCHANGER
Heat Exchanger ‼️.pdf
Heat exchangers transfer heat from one fluid to another. There are two main types: tube-and-shell and plate. Tube-and-shell consists of tubes in a shell, with one fluid flowing inside tubes and another outside. Plate type uses plates with fluids alternating between them. Counter flow arrangement is most efficient as fluids enter from opposite ends. Performance is affected by flow arrangement and surface enhancements. Heat exchanger effectiveness compares actual heat transfer to maximum possible.
Heatexchangers 124695176908-phpapp02-converted
Heat exchangers transfer heat from one medium to another. There are two main types: tube-and-shell and plate. Tube-and-shell consists of tubes in a shell, with fluids flowing inside and outside the tubes. Plate type uses plates to separate hot and cold fluids, providing a larger surface area. Heat exchangers can have parallel, counter, or cross flow arrangements. Performance is evaluated using parameters like log mean temperature difference, number of transfer units, effectiveness, and overall heat transfer coefficient.
Presentation on Heat Transfer.
Heat transfer is the movement of heat energy from warmer to cooler substances. The three main modes of heat transfer are conduction, convection, and radiation. Conduction involves the transfer of energy through direct contact of materials. Convection involves the transfer of energy by the movement of fluids like gases and liquids. Radiation involves the transfer of energy through electromagnetic waves without direct contact. Heat exchangers efficiently transfer heat between fluids or gases using various designs like double pipe, shell and tube, plate, and spiral configurations to conduct or convect heat between substances.
المبادلات الحرارية2023.سمنار الثرموسمنار الثرموسمنار الثرمو
The document discusses heat exchangers, which are devices that facilitate heat transfer between two fluids at different temperatures. It describes four common types of fluid flow configurations in heat exchangers: countercurrent, cocurrent, crossflow, and hybrid flows. It also outlines four main design configurations for heat exchangers: double-pipe, shell-and-tube, plate, and condensers/boilers. The document provides examples and diagrams to illustrate each type of flow configuration and design.
Heat Exchanger
The document discusses different types of heat exchangers. It begins by defining a heat exchanger as a device that transfers heat from one medium to another. It then provides examples of applications of heat exchangers in various industries. The document goes on to classify heat exchangers as either direct contact or indirect contact types, and lists examples of each type such as tubular, shell and tube, plate, and jacketed & kettle heat exchangers. It provides brief descriptions of some of these types.
HEAT TRANSFER Complete.pptx
Heat transfer is the process of transferring thermal energy between objects due to a temperature difference. There are three main mechanisms of heat transfer: conduction, convection, and radiation. Conduction involves direct contact between objects, convection involves the mixing and movement of heated fluids, and radiation transfers heat through electromagnetic waves without a medium. Heat exchangers and heat interchangers are devices that facilitate heat transfer between different fluids and are widely used in industrial processes.
Heat exchanger
Heat exchangers transfer heat from one medium to another. They are classified by flow configuration and construction. Key flow configurations are parallel, counter, and cross flow. Main construction types are shell and tube, and plate heat exchangers. Heat transfer is calculated using methods like log mean temperature difference (LMTD) and number of transfer units (NTU). Standards like TEMA provide guidelines for shell and tube heat exchanger design and components.
Log mean temperature difference
This document discusses different types of heat exchangers, including tube and shell and plate heat exchangers. It describes parallel flow, counter flow, and cross flow configurations. Counter flow heat exchangers are most efficient due to having the highest log mean temperature difference. The effectiveness-NTU method is introduced to calculate heat transfer rate when inlet/outlet temperatures are unknown. Heat exchangers are also classified as regenerative or non-regenerative based on whether the same fluid acts as both the heated and cooled fluid.
hhhhr.pdf
This document discusses heat exchangers, including their definition, types, selection factors, and applications. It describes four main types of heat exchangers: double pipe, shell and tube, plate, and condensers/evaporators/boilers. Shell and tube heat exchangers are the most commonly used in industry due to their large surface area and ability to operate at high temperatures and pressures. Selection of a heat exchanger depends on factors like the required heat transfer rate, cost, size/weight, types of fluids involved, and materials. Heat exchangers have various applications in industries like oil refining, steam generation, cooling processes, food processing, and power plants.
Heat transfer
This document discusses heat transfer mechanisms including conduction, convection, and radiation. It then describes various heat transfer equipment used in pharmaceutical industries like heat exchangers and heat interchangers. Specifically, it provides details on single pass tubular heaters, floating head two-pass heaters, multipass heaters, and double pipe heat interchangers. It explains how each type of equipment works and transfers heat between fluids through conduction across metal walls.
Pharmaceutical engineering: Heat transfer
Objectives, application, heat transfer mechanisms, Fourier's law, conduction, convection, radiation, heat interchangers, heat exchangers
Module 4.2 Heat Exchangers.pptx
A heat exchanger transfers heat between two or more fluids. There are several types including double pipe, shell and tube, plate, and spiral heat exchangers. Double pipe heat exchangers consist of one fluid passing through an inner tube while the other fluid passes in the outer tube. Shell and tube heat exchangers have one fluid passing through tubes inside a shell while the other fluid passes over the tubes. Plate heat exchangers use thin plates with precision cut channels to efficiently transfer heat between fluids. Spiral heat exchangers coil one tube around another in a counter-flow arrangement to optimize heat transfer in a compact design. Heat exchangers are widely used in industries like manufacturing, power plants, and buildings.
HEAT EXCHANGERS.pptx
Heat exchangers are devices that transfer thermal energy between two or more fluids at different temperatures. There are several types of heat exchangers classified by design and flow arrangement. The document discusses types including shell and tube, concentric tube, and compact heat exchangers. It also covers key heat exchanger concepts such as the overall heat transfer coefficient, log mean temperature difference, fouling factors, and the differences between parallel and counterflow heat exchangers.
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المبادلات الحرارية2023.سمنار الثرموسمنار الثرموسمنار الثرمو
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Heat exchanger
- 1. Heat Exchanger Amitesh.Kumar Gau-c-10/L-193
- 2. Introduction Heat exchangers are devices in which heat is transferred between two fluids at different temperatures without any mixing of the fluids.
- 3. Heat exchanger are classified on the basis of -- • Transfer process • Number of fluids • Surface compactness • Construction • Flow arrangement • Heat transfer mechanisms
- 4. Types of Heat Exchangers On the basis of transfer process:- • Direct transfer type Or Recuperating exchanger. • Storage type Or Regenerating exchanger. • Direct contact type Or Direct contact exchanger.
- 5. Concentric tube Heat Exchanger Direct transfer type of heat exchanger is one in which the cold and hot fluids flow simultaneously through the device and heat is transferred through a wall separating the fluids.
- 7. Storage type/Recuperating Exchanger • Storage type heat exchanger is one in which the heat transfer from the hot fluid to the cold fluid through a coupling medium in the form of a porous solid matrix. The hot and cold fluids flow alternately through the matrix, the hot fluid storing heat in it and the cold fluid extracting heat from it.
- 8. Single Matrix Storage type Heat Exchanger
- 9. Direct Contact type Direct contact type heat exchanger is one in which the two fluids are not separated. If heat is to be transferred between a gas and a liquid, the gas is either bubbled through the liquid or the liquid is sprayed in the form of droplets into the gas.
- 10. Direct contact type heat exchanger
- 11. THE END