How to size AC Unit for indoor swimming pool?

Actually I made many searches I didn't found any useful data but I found this site 

Www.desert-air.com

Home - download - technical bulletin - application notes - tech tips - pool room 

Hope to be useful and if you found any data please give me information 

Thanks 

As its name suggests, a reverse-cycle heat pump cools your swimming pool by reversing its heating cycle. A thermostat on the heat pump allows you to set a specific swimming pool water temperature, and the heat pump will maintain that temperature by using its heating cycle, cooling cycle, or, in some cases, both. Inside the unit, a reversing valve allows refrigerant to travel one direction during heating cycles and another during cooling cycles.

Every heat pump contains two heat exchangers in addition to a compressor. One acts as an air-to-refrigerant heat exchanger and the other acts as a refrigerant-to-water exchanger During the heating cycle, the air-to-refrigerant heat exchanger collects heat from the air and transfers it to the swimming pool water using the refrigerant-to-water heat exchanger. During the cooling cycle (reverse cycle), the refrigerant flows in the opposite direction. Heat is transferred from the swimming pool water to the refrigerant to the air. The process repeats until the desired swimming pool water temperature – as indicated by the thermostat – is attained.

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