For a "non-engineer," could someone please explain what I'm hearing on the project testing this pilot credit--operator concern that cooling tower won't perform as designed and water-testing analysts advice NOT to operate at levels recommended in this pilot credit? Again, I need the basics and the questions to ask????
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Kath Williams
LEED Fellow 2011, PrincipalKath Williams + Associates
147 thumbs up
October 31, 2013 - 1:18 pm
This pilot credit was denied based on the submitted documentation. For purposes of education, here are the final review comments.
"A revised LEED Credit Form has been provided stating that the project has registered for Pilot Credit 17: Cooling Tower Makeup Water. A one-time potable water analysis has been conducted measuring the five control parameters in ppm or mg/l (calcium (Ca); total alkalinity; silica (Si);
chloride (CI); and conductivity). The cooling tower cycles have been calculated and limited to avoid exceeding maximum values the credit parameters. The system and metering credit criteria have also been incorporated. The following documentation has been provided: 1) a water analysis measuring the five control parameters (measured in ppm or mg/l); 2) confirmation of the location of the
conductivity meter; 3) the diagram showing meter locations; and 4) a narrative describing the water treatment system and the number of cycles which the cooling tower can achieve without exceeding the control parameters. Additionally, a project team representative has registered with LEEDuser, and the feedback survey has been completed. A copy of the Cooling Tower Water Use found on USGBC
website has also been provided.
However, the provided narrative does not include information regarding the predicted acceptable corrosion rates for each pipe material within the condenser water system. The documentation does not demonstrate credit compliance."