The Nonresidential Plug Load Modeling CASE Report will propose revisions to the rulesets (methodology) that the Title 24 compliance software uses to estimate plug load energy use in new and existing nonresidential buildings of various types and sizes. The updated rulesets will be presented as revised language for the Nonresidential Alternate Calculation Method Reference Manual. The revised methodology will use recent data on end use saturation, unit energy consumption (UEC), appliance efficiency standards and market trends over time to provide more accurate estimates of annual hourly plug loads energy use in nonresidential buildings. In doing so, the Statewide CASE Team will aim to use an intuitive methodology that can be replicated in the future with updated data and improved upon as our understanding of plug load energy use evolves. This measure does not include updating the assumptions used to estimate unregulated lighting loads. A final key component of this effort will also be to verify the plug load model is working within CBECC-com, after it is implemented by the California Energy Commission and their consultants.
For each building type, plug load energy use will be modeled as the sum of component end uses (e.g., laptop computers), categories of end uses (e.g., medical imaging equipment), and a residual category, which will typically be dominated by Miscellaneous Electronic Loads (MELs). The number of explicitly modeled end uses may vary by building type due to data availability and relative importance of end uses to total building load. For example, office equipment or plug-in networking equipment may be modeled with greater granularity in large offices than in restaurants.
There are no energy savings expected from this model.
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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.
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