How a Eco Pool Heat Pump System Works
Swimming pool water is diverted to the pool heat pump by installing a bye-pass from the return pipe running from the pool filter to the return jets in the pool. This enables a simpler and cheaper installation, and utilizes the pool filter pump which usually runs for the right amount of time to enable consistent heating and achieve temperatures needed for comfortable swimming. Again it is better to run your pool filter pump during daylight hours i.e. when it is most likely that debris will enter the pool by traffic or wind, and also when the pool is most likely to be used by bathers.
Daylight hours are when the heat pump will run at its most efficient output, as this is when there is the greatest amount of ambient energy in the air. When the heat pump is running warm air is passed through the condenser effectively sucked through the vanes by the fan positioned in the top of the heat pump. The fan and the Hitachi, or Sanyo compressor are the only two components that consume any power. The heat pump extracts its energy from the ambient air which is now passing through the condenser, sometimes referred to as the evaporator coil.
The technology is similar to that utilized in refrigerators and air conditioning units. The compressor compresses refrigerant gas, R407C, which amplifies the heat absorbed from the air as it passes through the condenser. This heat is passed through a titanium double helix coil which is positioned inside the heat exchanger tank. The heat exchanger tank is made from PVC. The combination of the titanium coil and the PVC tank make the heat exchanger very resistant against corrosion due to the highly corrosive nature of swimming pool water, usually containing chlorine or salt. Any heat pump that does not use these critical materials in the heat exchanger will have a significantly reduced lifetime.
Calyenty heat pumps have a number of sensors and switches that help to operate the system to optimum efficiency and protect it against extreme external conditions. There is a state of the art digital controller with back lit screen, which is remote from the heat pump so that it can be installed somewhere convenient for the user. The main user controls for the heat pump are very simple, including the on/off switch and the temperature set buttons. Just set the desired temperature and leave it.
The heat pump will only run when the temperature sensor senses that there is a need for the pool to have the temperature raised to the required level. This functionality can also be activated by our unique SMS switch module. This enables the user to control his heat pump from anywhere in the world by just sending an SMS texts message from his mobile phone.
The above figures are for the Calyenty RBH125 12.5kW output Stainless Steel swimming pool heat pump, heating a 8m x 4m x 1.5m tiled swimming pool located at our test facility in Cologne on the Costa Brava Spain España 2007/2008. The local climate is greatly influenced by the Pyrenees and the average annual rain fall in this region is equal to that of Manchester, England. We predict that the performance of a heat pump located in the United Kingdom will be approximately 15% less efficient as it is cooler. Costa Blanca, Murcia, Balearic and Canary Islands should perform approximately 20% better.
We recommend the Calyenty RBH185 for pools 10m x 5m. If you have a pool of any different dimensions please contact us for more advise.
The costs are measured using a standard electricity meter so reflect the actual costs. These costs are based on the standard Spanish tariff. Other regions and countries may differ.
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