The basic operating principle of the SwimPool is simple. Air is drawn from the pool enclosure
through the dehumidification coil where moisture and heat are removed. Condensing the moisture
on the coil releases the same amount of heat that was required to evaporate it from the pool
surface. This heat is called latent heat and is transferred into the evaporating refrigerant.
The air which cools during this process releases heat called sensible heat, that is also
transferred into the evaporating refrigerant. On a well-designed system, the latent heat will
be approximately the same as sensible heat. When the refrigerant leaves the dehumidification
coil, it is completely evaporated into a vapour and drawn into the compressor.
The compressor raises the temperature and pressure of the refrigerant vapour. The energy required
to do this is transferred into the refrigerant vapour and is called compressor heat. The
refrigerant now contains sensible and latent heat from the air and the compressor heat. This
combination called the total heat of rejection is available for pool use.
The high-pressure refrigerant then passes to the reheat condenser where it is condensed. The
air leaving the dehumidification coil is cold and nearly saturated. It must be heated to at
least the pool air temperature, or it will cool the pool air. As the air passes through the
reheat condenser where it receives heat from the condensing refrigerant, all of the sensible
heat released from the air in the dehumidification process must be returned to the air by
the reheat condenser; this brings the air back up to the pool air temperature.