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Revised Solar Water Heating Deemed Savings Estimates

Revised Solar Water Heating Deemed Savings Estimates. April 1, 2003. Reason for Revisions. Current “Deemed” Values based on system with 40 sq.ft. collector area Oregon Tax Credits and “Brightway” specifications cover three “generic” sizes 37.3 sq.ft. 60.0 sq.ft. 74.6 sq.ft.

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Revised Solar Water Heating Deemed Savings Estimates

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  1. Revised Solar Water Heating Deemed Savings Estimates April 1, 2003

  2. Reason for Revisions • Current “Deemed” Values based on system with 40 sq.ft. collector area • Oregon Tax Credits and “Brightway” specifications cover three “generic” sizes • 37.3 sq.ft. • 60.0 sq.ft. • 74.6 sq.ft.

  3. Analytical Approach • Use Oregon Office of Energy “Savings” Estimates for Systems Approved for Tax Credit • Estimate “Average” savings/sq.ft. collector area across all listed systems • Use “curve fit” to establish savings for three system sizes

  4. Regression Fit for Solar DHW Systems with Tanks

  5. Regression Fit for Solar DHW Systems without Tanks

  6. Comparison of Regression Fit Results for 40 sq.ft. System

  7. Comparison of Regression Fit Results for 80 sq.ft. System

  8. Regression Fit Results for Deemed Solar DHW Systems

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