what is the difference between heat flow and heat transfer?
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Heat is the amount of energy transferred due to temperature difference between two bodies. ... Whereas Heat Transfer is the term used for the Rate of heat transfer at any instant due to temperature difference (which is given as the amount of heat transferred per unit time). Unit - Joule/Second or Watt.
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['As pointed out the heat flow is governed by temperature gradient, No gradient no heat.', 'Another important aspect of heat is its quality . Quality is the measure of how much useful work can be obtained by the heat. The higher the temperature, the higher the quality of heat.']
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The difference between heat and thermal energy is that thermal energy is not in the process of being transferred; it is not in transit, but remains as part of the internal energy of the system; heat, on the other hand, is energy in transit, i.e. energy in the process of being transferred from a hotter system towards .. ...
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Conduction is the most common form of heat transfer and occurs via physical contact. Convection When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along.
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The main process of heat transfer in terms of an air-conditioning unit is Convection, which has to do with moving fluids like air. As air is cooled, it contracts, become denser and sink.
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The particles transfer energy by moving from warmer to cooler areas. They move in loops called convection currents. Radiation is the transfer of thermal energy by waves that can travel through empty space. When the waves reach objects, they transfer thermal energy to the objects.
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Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species, either cold or hot, to achieve heat transfer.
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In convection, the heat transfer takes within the fluid. In radiation, heat transfer occurs through electromagnetic waves without involving particles. The heat transfer takes place due to the difference in temperature. ... For example, heat transfer between air and water.
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There are usually three methods in which the heat transfers between bodies in nature. Namely conduction, convection and radiation. Radiation is the mode in which heat transfers without presence of any medium. ... Thus, heat is energy whereas radiation is a mode of this energy to get transferred.
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The movement of particles of matter results in thermal energy. This energy is then transferred to other substances in three ways, conduction, convection, and radiation. In conduction, thermal energy is transferred through direct contact. ... Convection is the transfer of heat by the actual movement of the warmed matter.
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"Thermodynamics" deals with the amount of energy in form of heat or work during a process and only considers the end states in equilibrium. ... "Heat Transfer" deals with the rate of energy transfer thus, it gives idea of how long a heat transfer will occur? Heat transfer deals with time and non equilibrium phenomena.
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The movement of heat by moving a hot fluid (air, water) away from the heat source into a colder area we call convection. ... In short, convection is the transfer of heat by moving mass. The current is the motion of this mass. Convection creates currents.
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Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature. It is very important to know that, in science, heat and temperature are not the same thing.
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Heat transfer occurs via three fundamental mechanisms: conduction, convection, and radiation. Conduction refers to the transfer of heat through a stationary medium. Convection occurs when heat travels along with a moving fluid. Radiation is the transfer of heat in the form of electromagnetic radiation.
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The core difference is that heat deals with thermal energy, whereas temperature is more concerned with molecular kinetic energy. Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.
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Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature.
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Thermal Energy Transfer. ... Thermal energy typically flows from a warmer material to a cooler material. Generally, when thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three methods of thermal energy transfer: conduction, convection, and radiation ...