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# How do you calculate the evaporation rate of water?

## How do you calculate the evaporation rate of water?

If you divide the distance by the elapsed time, the result will be the rate of water loss (evaporation). To convert this evaporation rate in to gallons lost over a specific time period, you will need convert the measure into a volume.

## How do you calculate evaporation?

Most common among the current methods used in studies of evaporation is the water and heat balance method which makes it possible to estimate evaporation in principle alongside trans- piration. Net evaporation can only be estimated for water bodies’with free water surfaces (e.g. for highly-mineralized lakes).

How do you calculate evaporation temperature?

The Penman formula for the evaporation rate from a lake is simplified to the following: E 0 = 700 T m / ( 100 − A ) + 15 ( T − T d ) ( 80 − T ) ( mm day − 1 ) where Tm = T + 0.006h, h is the elevation (metres), T is the mean temperature, A is the latitude (degrees) and Td is the mean dew-point.

### What is the evaporating temperature for water?

212° F
Heat (energy) is necessary for evaporation to occur. Energy is used to break the bonds that hold water molecules together, which is why water easily evaporates at the boiling point (212° F, 100° C) but evaporates much more slowly at the freezing point.

### What is the normal evaporation of pool water?

The average pool water evaporation rate is about a quarter of an inch of water per day or more than two inches in a week, which on a 33′ x 18′ swimming pool (an average pool size) is more than 2500 liters or approximately 600 gallons a week; this may vary depending on your climate and the factors listed above.

Does water evaporate at low temperatures?

Even at low temperatures, there are some water molecules are have enough energy to escape and that’s why evaporation in water can occur at any temperature (yes, even if the water is in ice). When the temperature increases, there are more molecules with higher kinetic energy and thus, more water can evaporate.

## How to calculate the evaporation rate of water?

Enter the velocity of air above the water surface, the water surface area, the maximum humidity ratio of saturated air, and the current humidity ratio of air to determine the evaporation rate of water from a surface. The following formula is used to calculate the evaporation rate of water.

## What is the evaporation heat of water at 20oC?

The evaporation heat (enthalpy) of water at temperature at 20oC is 2454 kJ/kg. The heat supply required to maintain the temperature of the water in the swimming pool can be calculated as.

How is the evaporation rate influenced by the real world?

The evaporation rate is influenced by In a real-world situation of evaporating water, none of these four quantities above remains constant because the process of evaporation itself changes them. Water evaporating takes quite a lot of heat away — 540 calories per gram — when it evaporates.

### Why is the evaporation rate slow in a swimming pool?

Evaporation rate will be slower if the air contains moisture, or there is a partial pressure of water vapor in the air. Once water of swimming pool evaporates, the air at the surface of the pool soon becomes saturated aka humidity reaches 100%, thereby reducing the rate of evaporation to zero.