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how to keep beverages cool in summer - heat transfer film

by:Cailong     2019-07-17
how to keep beverages cool in summer  -  heat transfer film
Washington, April 26ANI)
: According to climate scientists at the University of Washington, in wet weather, your drink will be more than twice as warm as in dry heat.
Because in the sweltering weather, condensation outside the canned drink not only makes it slide, but these drops provide more heat than the surrounding air, then explains.
During the typical summer weather in New Orleans, the heat released by condensation heats the drink up to 6 degrees Fahrenheit in five minutes.
"The most important thing beer koozie does is probably not simply isolating the jar, but preventing condensation from forming outside the jar," said Dale Duran, professor of atmospheric science at UW . ". He's co-
The results of the authors give a series of seemingly reasonable levels of summer temperature and humidity that do shear warm.
For example, on the hottest and wettest day in Dalan, Saudi Arabia, condensation alone can warm a can of heads from nearby
In just five minutes, the temperature will reach 48 degrees Fahrenheit.
The survey began a few years ago when Durran was teaching UW Atmospheric Science 101 and trying to find a good example of the heat generated by condensation.
There are many examples of evaporation and cooling, but there are few opposite phenomena.
Duran believes that water droplets formed on cold canned drinks may just be an example of what he is looking. A quick back-of-the-
The napkin calculation shows that the heat released by the water is only a few inches thick, and the water covered in the can heats the contents of the can up to 9 degrees Fahrenheit.
Although Duran is usually more of a theorist, he believes that this result needs experimental verification.
He recruited.
Author Dargan Frierson is an associate professor of atmospheric science at UW, their little-
Use the basement bathroom, use the space heater and hot water shower to change the temperature and humidity.
The findings confirm the initial results and they started a larger onescale test.
First, they recruited colleagues in Wilmington, North Carolina, Friesen's coastal hometown, copied the experiment, and compared the results with the results of the hot and dry Seattle day.
But they decided they needed to test the broader conditions.
Finally, last summer, undergraduate students Stella Cui and Steven Briga entered the project to conduct appropriate experiments in the UW Atmospheric science building.
They found an experimental machine that looks like 1950, the last time it was used decades ago to simulate the formation of the cloud.
In the context of the National Science Foundation's funding for education promotion, students first place a jar in a bucket of ice water to cool, then dry it and place it in a laboratory that meets the appropriate conditions.
After 5 minutes, they took out the jar and weighed it to measure the amount of condensation and recorded the final temperature of the water inside.
Phenomenon in work
Latent heat of condensation
It is at the heart of Friesen's research on water vapor, heat transfer and global climate change.
"We expect the atmosphere to be more humid with global warming because the warm air can hold more water vapor," said Friesen . ".
Because heat transfers when water evaporates or condenses, this change affects the formation of wind cycles, weather patterns, and storms.
The study of Durran included studies of thunderstorms, which were driven by heat released by condensation in rising wet air.
The results were published today in the journal Physics in April. (ANI)
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