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It depends a lot on the temperature and humidity. Here in Southern Arizona it is 110 degrees and 10% humidity (hot and dry) right now, and my pool loses about an inch every three days or so. Wind is also a major factor in evaporation. The quicker the moisture is pushed off the top of the pool the faster it is replaced with more. Windy equals increased evaporation rates.
The evaporation rates of occupied and unoccupied Swimming Pools have been measured to derive empirical equations for calculating loss. Three references are:
1. Smith, Charles C., George O.C. Lof, Randy W. Jones, "Rates of Evaporation from Swimming Pools in Active Use", ASHRAE Transactions, Volume 104, 1998
2. Smith, Charles C., George O.C. Lof, Randy W. Jones, "Measurement and Analysis of Evaporation from an Inactive Outdoor Swimming Pool", Solar Energy, Vol. 53, No. 1, pp. 3-7, 1994
3. Shah, Mohammed, "Calculating Evaporation Rates from Indoor Water Pools", HPAC Engineering, March 2004
A spreadsheet tool for estimating the heat loss due to evaporation from an indoor pool is available at http://www.energyideas.org/documents/spreadsheets/IndoorPoolCalc.xls.
This tool is based on the reference above by Shah.
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How can you calculate the evaporation rate of your swimming pool?
To calculate the evaporation rate of your swimming pool, you can use a simple formula: Evaporation Rate = (Pool surface area) x (Evaporation rate factor) x (Temperature difference). Measure the surface area of your pool, find the evaporation rate factor for your area, and determine the temperature difference between the pool water and the air. Multiply these values to calculate the evaporation rate.
Would heating or cooling a pool decrease evaporation?
Heating a pool will increase the rate of evaporation from that pool.
What is the evaporation rate of a solar pool heating system on a swimming pool?
Approx. 1.5" to 2" per wk.
Will a darker pool liner cause more water evaporation?
A dark pool liner might cause a very small increase in water evaporation, but nothing significant. The dark pool liner will raise the water temp a bit which, in turn, may increase the evaporation rate. But, the evaporation rate is much more dependent upon the air temperature and humidity than on the water temp, so the increase in water temp would only have a very small effect on the overall or net water evaporation rate. Hope this helps ... yes, it will, and it could be a significant increase.
What is the evaporation rate of water in a typical outdoor swimming pool during a hot summer day?
The evaporation rate of water in a typical outdoor swimming pool during a hot summer day can vary, but on average it is around 1/4 to 1/2 inch per day.
How much water should a pool lose in April?
The National Weather Service uses a large water pan with a diameter of 4 feet. They measure the drop in water level in one day, fill it back to the level it was before and measure the level drop the next day. They and others do this all over the United States. Others do it throughout the world. The Weather Service reports the evaporation at each location, each day, and sum all these daily values up to obtain an annual evaporation rate in inches. All the data through the US is collected and compiled into an annual evaporation map. Looking at the annual evaporation map one can find the average annual evaporation rate for any location. It is roughly 100 inches for Tucson, Arizona. The evaporation rate varies with temperature, wind speed, sunshine, and relative humidity. The evaporation rate also varies throughout the year. A rough daily rate is given by dividing the annual rate by 365 days. Rough daily evaporation rate = Annual Evaporation rate / 365 For Tucson the rough evaporation rate is 100 inches/365 which is about 1/3 inch per day. Swimming pool If we use this rough evaporation rate, we can find how much a swimming pool water level might drop in 5 days Total surface drop = (5 days) (daily evaporation rate)
How much water evaporates from a pool in Phoenix?
Eventually, all of it if not replenished. The rate of evaporation depends on local climatic conditions.
What happens when the rate of evaporation of a liquid as the liquid is cooled?
Rate of evaporation depends on temperature. As Temp decreases, so does the rate of evaporation.
How do you measure the water evaporation from your swimming pool?
Well, measuring the water evaporation from your swimming pool is as simple as placing a bucket filled with pool water on the pool steps. Mark the water level inside the bucket and on the pool edge. After a few days, compare the water loss in the bucket to the pool water loss - that difference is your evaporation rate. Remember, it's all about taking your time and enjoying the process, just like painting happy little clouds in the sky.
How a warm day affect rate of evaporation?
The rate of evaporation increases
What is the average rate of evaporation of an outdoor pool in Texas?
The evaporation rate of an indoor swimming pool has many factors to consider. 1.) How large is the pool? 2.) What temperature are you keeping the pool water at? 3.) What temperature are you keeping your poolroom at? 4.) Are you using a pool cover? An example would be..... If you have a 300 sq. ft. pool and are keeping the pool at 82 degrees and the room at 84 degrees your evaporation rate would be 10.35 pounds per hour at a static level (no activity). If you do have an indoor pool or are considering having an indoor pool you will need to use mechanical dehumidification to handle the evaporation rate of your pool to protect the structure. Please email me direct if I can further assist you in that area. Regards, Michele Environmental Pool Systems www.dry-air.com
How does temperature affect the rate of evaporation?
The higher the temperature, the higher the rate of evaporation. It is
