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Perforated Tank

This study outlines the use of a specialized network of interlocking polyethylene filaments, referred to as the "Spiderbox" raindrop creator, in a test area tank. The device is designed to optimize water feed in cooling tower applications, while an inset overflow pipe regulates water levels. Initial issues with siphoning were resolved with a T-piece modification. The testing was conducted on a pervious pavement under varying rainfall intensities, with a calibration tray allowing for precise measurements of raindrop sizes and their impact on water levels.

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Perforated Tank

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Presentation Transcript

  1. Perforated Tank Main Water Feed Pipe Raindrop Creator-This is a network of interlocking polyethylene filaments used in cooling tower applications Test Area Tank containing device being tested Inset is overflow pipe used to control head in tank. Problems occurred due to siphoning but this was overcome by fitting a T-piece to break the siphon.

  2. “Spiderbox” raindrop creator

  3. Views showing tray used for stopping rainfall entering test area during equilibrium and also to allow calibration plots of water head against rainfall intensity Test item in place-in this case a pervious pavement without added inter block grit- This was used in a study on infiltration through upper geotextile and “failure” was indicated by water level reaching block surface Calibration/equilibration tray can be rolled out of way using these linear rollers

  4. “Raindrops” falling from base of plastic grid

  5. System used to measure raindrop size. Only images close to rule (as indicated by small shadow size) were measured

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