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How Does it Work?
The heart of an evaporative cooling system is the pad where the water evaporates and the air passing through the pads is cooled. A special water distribution system spreads water over the surface of the pad, ensuring a uniform supply of water to keep the entire air contact surface thoroughly wetted. Fans create a negative pressure, causing air to be drawn through the pads. Evaporation results from contact between air and water. A control system operates the water pump and the fan distributes the cool air.
The relative humidity is lowest in the afternoon when the temperature is at its highest. And the lower the humidity, the better the evaporative cooling effect. In other words, the cooling effect is best when you need it the most.
Source: www.bajarangs.com/whyevaporativecoolers.html
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoit cools better on a hot dry day because the evaporation of the water sucks the heat out of the air. More evaporation equals cooler air.
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Why does the water in a swimming pool feel cooler than air during the day but warmer than the air at night?
During the day - the side of the Earth facing the Sun heats up - the portion facing away from the sun is in night time - and thus is not being heated... making it cooler !
Which will heat up faster on a hot day a desert or a lake and why?
The desert will heat up faster than a lake. The sand particles have greater thermal conductivity and hence will take up heat faster than water molecules which do not take up heat as easily. It is also the reason why it is cooler at the sea side.
What type of environment is characterized by less than 25 cm a precipitation each year high temperatures during the day and cold temperatures at night?
A hot desert has less than 25 cm of precipitation per year and hot temperatures during the day and cooler temperatures at night.
Explain why large bodies of water cause local winds to shift direction from day to night?
During the day the land gets is heated fast, but the water takes a while to heat up. At night, water cools down right away, as does land, land absorbs heat faster than water and can also gets cooler faster.
Is the Simpson desert hot or cold?
The Simpson Desert is cold at night but Hot during the day. It is a Hot desert
Why does a desert cooler cool better on a hot dry day?
In a desert cooler, the water inside it is made to evaporate. This leads to absorption of energy from the surroundings, thereby cooling the surroundings. Again, we know that evaporation depends on the amount of water vapour present in air (humidity). If the amount of water vapour present in air is less, then evaporation is more. On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.
Why does an air cooler cool better on a hot dry day?
In a desert cooler, the water inside it is made to evaporate. This leads to absorption of energy from the surroundings, thereby cooling the surroundings. Again, we know that evaporation depends on the amount of water vapour present in air (humidity). If the amount of water vapour present in air is less, then evaporation is more. On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day
Why doe a desert cooler cool better on a hot dry day?
hummm i dont really know i think it is food
Why does hot coffee make you cooler on the hot summer day?
It makes you sweat more and cools your blood
Why does a desert have a wide variation in day and night temperatures?
A desert usually has little cloud cover and high humidity that would hold in day time heating. Therefore, the desert cools quite quickly when the sun sets.
Why might you not see any animals if you went for a walk in a desert during the day?
Many desert animals are not abroad during the heat of the day and only emerge at night when it is cooler.
When do Arctic foxes sleep?
A desert fox, and most all desert animals, sleep during the day, and hunt at night, because it is cooler at night.
How does the temperature change from day to night in the desert?
Sunshine during the day heats the surface of the desert. That then heats the air above it. Since the desert has few clouds of high humidity to hold this heat after the sun sets, the heat radiates back into space and the desert cools down quickly.
Are there any dangers in the desert?
A desert.. I think so because most of the animals are sleeping during the day when it's hot out, and they come out at night when it's much cooler. But i am pretty sure that there are some dangerous animals in a desert.
Why is night vision an adaptation for owls in a desert environment?
All owls have night vision. Since the desert can get so hot, most animals, including owls, come out at evening or night to avoid the heat of day. Since they're active at night, it's good to have nocturnal vision. Some desert owls are elf owls, pygmy owls, burrowing owls, great horned owls. It allows them to hunt when it is cooler.
Why the desert is cooler than a swamp at night?
The high humidity and cloud cover of a swamp act as a blanket, holding in the day's heating. The desert lacks humidity and clouds so the heat radiates back into space.
What does a xbox 360 cooler do?
the xbox cooler cools the fans on your xbox so you don't over heat it and so you dot get the red rings of death. if you play it 20 minutes to a hour a day you do not need to buy one because your not playing constantly. but if you play it 3 to 4 hours a day then yes it would be a good idea to buy it
