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Evaporation occurs when a liquid changes to a gas, but only on the surface of the liquid volume. The gas molecules transfer heat to the liquid molecules. An unequal distribution of heat causes some liquid molecules to become gas molecules. It is random and uneven. Energy from the sun also spawns evaporation. When evaporation does happen, the molecules that leave the liquid body takes a lot of heat with it, therefor the average temperature of the liquid decreases. Evaporation depends on heat, humidity, and air movement.

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βˆ™ 14y ago
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βˆ™ 13y ago

Evaporation is a phase change from liquid to gas.

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Q: What is heat transfer in condensation?
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What is the difference between film and dropwise condensation?

Film condensation occurs when a continuous liquid film forms on a surface during the condensation process, while dropwise condensation occurs when discrete droplets form on the surface. Dropwise condensation is more efficient in heat transfer compared to film condensation due to reduced resistance to heat transfer at the liquid-vapor interface.


What is the difference between Drop wise condensation and film wise condensation?

heat transfer rate high


Is Condensation thermal energy?

Condensation is a phase change process where a substance goes from a gas to a liquid state, releasing thermal energy in the form of heat. This type of energy transfer is known as heat of condensation.


High heat transfer coefficient film-wise condensation or drop-wise?

In dropwise condensation about 5-8 times higher coefficient than filmwise.


what type of heat transfer happens with liquid and gasses?

The primary heat transfer mechanisms between liquids and gases are convection and radiation. Convection involves the transfer of heat through the motion of the fluids themselves, while radiation involves the transfer of heat through electromagnetic waves. Both mechanisms are important in processes like boiling, condensation, and atmospheric heat exchange.


Why saturated steam is used in exchangers frequently rather then superheated?

The heat transfer coefficient of superheated steam is poor. Saturated steam has a better heat transfer coefficient, and also most of the heat transferred from steam occurs because of the condensation phase change.


How do hurricanes transfer heat?

Hurricanes transfer heat by drawing warmth from the ocean's surface through evaporation and condensation processes. As warm, moist air rises in the storm, it releases latent heat, fueling the hurricane's strength and intensity. This heat transfer mechanism helps drive the storm's circulation and can lead to rapid intensification.


Does heat energy add during condensation?

During condensation, heat energy is released as water vapor changes to liquid water. This is known as the latent heat of condensation.


Is heat added or released in condensation?

Heat is released during condensation. When a gas changes to a liquid during condensation, the molecules lose energy and release it in the form of heat.


What has the author Zhenhua Yu written?

Zhenhua Yu has written: 'Electrodynamically (EHD) enhanced condensation heat transfer in horizontal shell and tube condensers'


What are the two ways that hurricanes transfer heat?

Hurricanes transfer heat through the process of condensation of water vapor into liquid water, releasing latent heat energy. Additionally, hurricanes transport heat from the warm ocean surface to the upper atmosphere through strong convective processes like thunderstorms within the storm system.


Difference between film and drop wise condenation?

Film condensation occurs when a continuous film of condensed liquid forms on a surface, while dropwise condensation occurs when individual droplets of condensed liquid form and coalesce on a surface. Dropwise condensation is more efficient than film condensation in terms of heat transfer, but it is more difficult to achieve and maintain in practice.