Water Management | Crown Gardens

Crown Gardens
  • 143 apartments
  • ground level cafe
  • 13 storeys
  • 2 levels underground parking
  • heated outdoor pool, BBQ, gardens
  • gymnasium
  • library, meeting room

Water and energy savings achieved Crown Gardens demonstrate the vaue of water "Smart Meters" to keep track of water usage and alert building management to keaks or other spikes in consumption.

In March 2013 Crown Gardens installed Watersave SmartMeters to measure, monitor and manage water consumption. Six wireless devices record usage through the main water meter, the hot water meter, the combined pool and water feature meter, the irrigation meter and the two rooftop cooling towers. An automated leak detection and alarm system provides alerts when abnormal water usage occurs.

There have been a number of examples highlighting where water savings can be achieved:

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    Crown Gardens pool

    Outdoor pool

    a faulty ball float for the pool water supply was found to be continuously filling with water. This couldn’t be detected visually as it was running to the sewer from the overflow located inside the balance tank. The automated alarm system alerted the building manager to this excessive and unusual event
  • the system (which had successfully operated for several years) whereby the condenser water pumps and cooling towers would automatically shut down whenever the ambient temperature fell below 15 degrees (deemed the temperature when no air-conditioning in the building was required) was discovered to be the cause of serious water loss. The automated alarm system alerted the building manager to the semi-regular spike in water consumption. Subsequent investigation found that whenever the condenser water system shut down, the water within the cooling tower fill (plastic louvres) would drop back down and overfill the sump of each tower resulting in hundreds of litres pouring down the overflows
  • on 14th June, the alarm system alerted the building manager to excessive water being used by one of the rooftop cooling towers. After an initial water spike showing 47 L/Min, water usage settled at approximately 7 L/Min, accumulating to approximately 10,000 litres per day (a 5-fold increase on normal water usage at 2,000 L per day). After checking contractor records, the building manager discovered that the cooling towers had been cleaned on the day that the excessive water use first occurred. A normally unused supply water valve for one of the cooling towers had not been shut off correctly, causing the tank to refill continuously. As soon as this valve was fully closed, regular daily consumption patterns resumed.

Water Graph.jpg

Water consumption graph

Water consumption graph highlighting the cooling tower problem

Colin Volkofsky (Building Manager) said: “Today, we actively utilise the threshold alerts to ensure daily water consumption does not fall outside normal water usage patterns; and should excessive usage occur, then we can act on this immediately. We are also using the information that is now available to perform an accurate cost benefit analysis for the future installation of a water recycling plant for the garden irrigation and solar pre-heat system for the domestic hot water.”

Note: The above is a summary of the supplier's case study

 

Last Updated: 
Mon 25/01/2016

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