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Nonresidential Cooling Tower Minimum Efficiency

Measure Description

The CASE Report proposes a prescriptive requirement for higher efficiency axial fan open-circuit cooling towers for newly constructed projects, new systems that serve additions, and non building mounted replacements/alterations. The 2016 Title 24, Part 6 Standards’ mandatory minimum efficiency for axial fan open-circuit cooling towers is 42.1 gallons per minute of condenser water flow per fan horsepower (gpm/hp). The 2016 Alternate Calculation Method Reference Manual assumes an efficiency of 60 gpm/hp for a standard design cooling tower. The intent of this proposal is to add a prescriptive efficiency requirement of 80 gpm/hp in addition to the mandatory requirement and to increase the standard design listed in the Alternative Calculation Method (ACM) Reference Manual to 80 gpm/hp. The measure proposes this prescriptive requirement only for condenser water systems that are rated for 900 gpm (300 tons) or greater.

Resources

The Statewide CASE Team 2019 Title 24, Part 6 Final CASE Report is available below. The Final CASE Report incorporates feedback received during utility-sponsored stakeholder meetings, Energy Commission Pre-Rulemaking workshops, and personal communication with stakeholders.

Presentations and Meetings

  1. Presentation from Stakeholder Meeting on September 26, 2016
  2. Notes from Stakeholder Meeting on September 26, 2016
  3. Presentation from Stakeholder Meeting on March 15, 2017
  4. Notes from Stakeholder Meeting on March 15, 2017

Code Language

  1.  Draft Code Language

Reports

  1. Needs Assessment Report
  2. CASE Study Results Report
  3. Final CASE Report
  4. Draft CASE Report

 

Give Us Your Feedback

The Statewide CASE Team values input from all stakeholders engaged in the Title 24, Part 6 code change process. We encourage the open exchange of code change comments and concerns.

  • Use the form above to provide feedback on this measure.

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