Swimming Pool Scene ENERGY EFFICIENCY
when there is a demand), heat pump dehumidification with active recycling to both air and pool water and highly efficient plate-to- plate heat recuperators (which have no moving mechanical parts) to recover any energy that would typically be lost to outside. It is more and more common to find different types of renewable heat sources available on the market such as heat pumps (ground or air source), bio mass or solar. Heatstar are able to adapt the manufacture of their units to incorporate these technologies into the overall design of the swimming pool ensuring its maximum energy efficiency.
At specification stage Heatstar are able to provide projections for consumptions of energy, fuel and even carbon emissions. This information helps pool installers get tantalisingly closer to the perfect energy efficient pool. These principles apply to both commercial and residential applications.
A further advantage for pools with Heatstar environmental controls is that every unit Heatstar manufactures is tailored to the precise individual requirements of the application, obviating the need to under or oversize performance aspects or tolerate inappropriate equipment room layout, as can be the case with ‘off the shelf’ products.
FRESH AIR
Graham Kneale again: “Fresh air introduction is always necessary on an indoor pool to dilute chemicals in the atmosphere and to provide fresh air for occupants, but this needs to be minimised. “Too much fresh air will cause humidity levels to run too low and increase the heat losses from the pool.
“It is therefore essential to have a modern packaged air handing unit that controls the pool hall environment and water.” To minimise energy consumption, this should have modern speed controlled EC fans and heat pump dehumidifiers to extract the maximum amount of heat from the atmosphere. Air temperatures can be automatically reduced when the pool is covered, and any solar gains recycled into the pool water. The Calorex Delta will need a low pressure hot water supply, but if Calorex Air source heat pumps are used for this, then the energy efficiency can be improved even more. Calorex PP16AMY heat
ABOVE: Pollet Pool Group is enjoying unprecedented sales of its Inverter Plus heat pump.
pumps can deliver heat to a Delta using approximately 1/3 of the energy or less that a gas boiler would use.
“Replacing an old fashioned fresh air system with a new state of the art Calorex Delta will typically result in produce payback periods of one to two years,” says Graham. “Air source heat pumps added to this would offer longer paybacks of five to eight years, but still worth considering if the longer term is in view.”
UV provides an energy benefit to all pool operators who presently control combined chlorine only by dilution with fresh water. Addition of fresh water requires pool water to be removed first, through filter back washes and when this is done, heat is also lost to waste.
BATHER LOADS PWTAG has guidance for minimum water additional rates, based on bather loads and this should be followed, but if backwashing is done more frequently than required, simply to control combined chlorine, UV is an energy benefactor. The energy savings can be significant. In addition to its proven protection against chlorine-resistant pathogens such as Cryptosporidium, UV is an effective method of controlling combined chlorine. Over and above this, atg’s new WF range has been developed
ABOVE: Heatstar is able to provide projections for consumptions of energy, fuel and even carbon emissions at specification stage.
ABOVE: Graves Leisure centre have recently installed two atg WF UV units. Swimming Pool Scene ENERGY EFFICIENCY 35
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