In drought-affected urban and rural areas with stringent water restrictions, conserving water is a major concern. For an uncovered domestic pool in Melbourne, for example, evaporation can cause an annual water loss of 55,000 litres.
A properly fitted solar pool cover or thermal pool cover can reduce this loss by 38,500 litres. That’s 38,500 litres that won’t need to be topped up each year.
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Evaporation occurs when water in its liquid form turns into its vapour form, better known as gas. There are 3 things that affect the rate at which evaporation occurs.
Wind: The stronger the wind the more water lost to evaporation. This is because on the surface of the pool there is an insulating layer that helps keep the water warm and hold moisture in. The stronger the wind the more that layer will blow away and create a high amount of water lost through evaporation.
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Temperature: The higher the temperature the more evaporation. Also if there is a large difference between the temperature of the pool and the air, then there is a greater evaporation rate.
Humidity: The higher the humidity the less evaporation .This is because when the air is dry it naturally has a higher need for water vapour compared to moist, humid air that is less likely to produce evaporation because it doesn’t require as much water vapour. |