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Explain difference between heat transfer mechanisms in solids liquids gases and combinations of substances in terms molecular motion bulk motion and surface properties in industrial processes?
In solids, heat is transferred by conduction, the movement (vibration) of molecules. Heat transfer from solids to liquids and gases takes place through convection, or the movement of fluids at the surface. Radiation heat transfer can occur without a medium.
The transfer of heat by fluid?
The transfer of heat by fluid is convection.
Is convection the main type of heat transfer?
No, in the universe radiation heat transfer is by far the largest transfer.
Is conduction a heat transfer by direct contact of particles of matter?
Yes, whereas convection heat transfer is the transfer of heat via a liquid, and radiative heat transfer occurs through empty space (like the heat you feel from the sun).
What is the difference between heat transfer and mass transfer?
Heat transfer deals with the movement of heat and temperature gradients. The three types of heat transfer are conduction, convection, and radiation. Mass transfer deals with concentrations of a particular substance. Types of mass transfer include diffusion and convection.
The advantages of an PCB?
It has excellent heat transfer properties.
Disadvantage of CPU?
the only problem(disadvantage) is its heat properties i mean it needs a heat sink to transfer all its heat it gets heated very fast
Why work and heat transfer are not property of the system?
irstly from Thermodynamics point of view, we need to call heat as Heat transfer. Both Heat and work transfer are energies in transit. They come into picture only when a process is taking place. Also the quantity of heat transfer depends on the type of process or path followed. So Heat Transfer is a path function but not a property(which is a point function). 📷 In case of properties, the difference in properties (here P2-P1 or V2- V1)between state 1 and state 2 always remains same irrespective of the path followed. So properties are called Exact Differentials or Point functions. But in case of Heat transfer and Work transfer, the quantity of heat and work transfer between state 1 and state 2 depends on the path followed. Therefore heat and work transfer are not exact differentials,they are Inexact differentials or path functions.
What is convective heat transfer?
Convection heat transfer is the transfer of heat by the movement of a fluid.
How does heat escape through walls?
Heat inside a building warms the wall surface by convection,(the transfer of heat by fluid motion), the heat then travels through the wall by conduction (molecule by molecule heat transfer), the outer surface of the wall then gives off heat to the atmosphere again by convection. The rate of heat transfer through the wall is affected by two things: the number of films (surfaces, or boundaries) it must pass through, the more films the slower the transfer. And secondly the u factor, or insulation properties of the materials through which the heat travels.Heat inside a building warms the wall surface by convection,(the transfer of heat by fluid motion), the heat then travels through the wall by conduction (molecule by molecule heat transfer), the outer surface of the wall then gives off heat to the atmosphere again by convection. The rate of heat transfer through the wall is affected by two things: the number of films (surfaces, or boundaries) it must pass through, the more films the slower the transfer. And secondly the u factor, or insulation properties of the materials through which the heat travels.Read more: How_does_heat_escape_through_walls
What are two examples of heat transfer?
Convection - heat transfer through liquids.Conduction - heat transfer through solids.Radiation - heat transfer through vacuum.
Which method of heat transfer is fastest conduction convection or radiation?
Conduction . . . depends on the properties of the material through which the heat is conductedConvection . . . depends on the physical movement of the material carrying the heat from level to levelRadiation . . . electromagnetic waves, moving from place to place at the speed of light.Looks like Radiation would transfer heat the fastest.
How heat can be lost through walls?
Heat inside a building warms the wall surface by convection,(the transfer of heat by fluid motion), the heat then travels through the wall by conduction (molecule by molecule heat transfer), the outer surface of the wall then gives off heat to the atmosphere again by convection. The rate of heat transfer through the wall is affected by two things: the number of films (surfaces, or boundaries) it must pass through, the more films the slower the transfer. And secondly the u factor, or insulation properties of the materials through which the heat travels.Read more: How_does_heat_escape_through_walls
How does a wall loose heat?
Heat inside a building warms the wall surface by convection,(the transfer of heat by fluid motion), the heat then travels through the wall by conduction (molecule by molecule heat transfer), the outer surface of the wall then gives off heat to the atmosphere again by convection. The rate of heat transfer through the wall is affected by two things: the number of films (surfaces, or boundaries) it must pass through, the more films the slower the transfer. And secondly the u factor, or insulation properties of the materials through which the heat travels.Read more: How_does_heat_escape_through_walls
How can is heat be lost through walls?
Heat inside a building warms the wall surface by convection,(the transfer of heat by fluid motion), the heat then travels through the wall by conduction (molecule by molecule heat transfer), the outer surface of the wall then gives off heat to the atmosphere again by convection. The rate of heat transfer through the wall is affected by two things: the number of films (surfaces, or boundaries) it must pass through, the more films the slower the transfer. And secondly the u factor, or insulation properties of the materials through which the heat travels.Read more: How_does_heat_escape_through_walls
Why should you put the fin across gas side in heat exchanger application?
in my opinion because the gas is more efficient for trans heat to the material and we use the fins for icrease the heat transfer from the body to the surrounding and the gas will help for econtinuatioin heat transfer from the body because the gas not constant in its temperature and other properties
What is convective heat?
Convection heat transfer is the transfer of heat by the movement of a fluid.
