LEISURE & HOSPITALITY FACILITIES
PADDLING PROFIT
Energy savings can be made anywhere, even your facility’s swimming pool. Siemens Water Technologies explain why this was the case at Tonbridge Swimming Pool.
Reducing capital spend, as well as carbon footprint, are pressures faced by organisations everywhere – and leisure and hospitality facilities are no exception. For many facilities, swimming pools are one of the largest consumers of energy, as the cycle of heating and cleaning the water is ongoing. Both chemical and energy wastage occurs as systems continually pump and treat water, despite the fluctuation of bathing loads and subsequent requirements of the water.
Many operators of leisure and hospitality facilities are unaware of the levels of savings that can be achieved through adopting an integrated solution, which will optimise energy, water and chemical usage, while maintaining optimal quality conditions. To help eradicate this wastage, an energy and water optimisation (EWO) system can be utilised that can be adapted to meet a facility’s specific and fluctuating needs. Siemens offers an EWO system which has a modular design so operators can select the right elements for their facility and effectively integrate them together. The Siemens DEPOLOX Pool controller sits at the heart of this system. It continuously monitors all of the critical water quality parameters, automatically controlling the addition of disinfectant and pH correction to reflect the changes in the pool.
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Importantly, the controller can also be offered with options to measure the combined chlorine, total dissolves solids (TDS) and redox value to present an overview of the overall water quality at any time. This means that if the pool water is within the user-defined quality limits, the DEPOLOX Pool can signal to the pool’s flow meters and the variable speed drives to reduce their speed. Should this quality deviate, the controller does the reverse and normal circulation levels resume. Crucially, this is where significant energy savings are to be made and water quality can be maintained even as bathing loads fluctuate.
A good example is the work carried out for Tonbridge and Malling Borough Council at Tonbridge Swimming Pool. The management team wanted to minimise energy consumption while maintaining optimal water quality conditions. Discussions with Siemens Water Technologies provided a solution compatible with the current treatment system. Eight SED2 (G120P) variable speed drives (VSDs), along with three Siemens Mag 5000 flow meters, a ChemWeb and three DEPOLOX Pool systems were specified.
By providing the pool management team with constant access to controller data, they now have the ability to change the predefined settings without requiring direct access to the DEPOLOX Pool
controllers. As far as results are concerned, when free and combined chlorine, pH, Redox and TDS are at user-defined values, the Din contact from the DEPOLOX Pool reduced the flow in the circulation pumps by 20%, dropping energy consumption to 50% of normal usage. The installation of the VSDs also gave an immediate saving of 25% as the pool flow was paced to the original design flow, eliminating ‘throttling back’ on the filters.
For ultimate efficiency, integration should span the complete water system of any facility, not just the pool. This system should also use low footprint technologies for the best use of space and, vitally, ensure a safe environment for customers. A total water treatment solution includes everything from rainwater harvesting through to cooling towers and sterile cleaning to meet these objectives and the individual needs of each leisure facility.
To achieve significant cost and energy savings, solutions cannot just work in isolation. While committing spend on a product that achieves your goals in one area is good practice, it is as part of a totally integrated solution that efficiency will truly be achieved.
www.industry.siemens.co.uk
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