The applicant is requesting clarification regarding the modeling of a refrigerated warehouse, where refrigeration will comprise the single largest energy end-use in the project. Specifically, the applicant requests verification that the following compliance path is appropriate for a Refrigerated Warehouse building 1. ASHRAE 90.1-2004 lighting requirements will be used 2. Insulation for the Baseline Case Freezers and Loading Dock will be stricter than ASHRAE 90.1-2004, and will comply with ASHRAE Design Essentials, Table 2, p. 50. 3. Refrigeration efficiency measures will be modeled identically in the Baseline and Proposed energy models, and then documented using the Exceptional Calculation Methodology. Most of these measures will use the SBD / Case report as a Baseline, while the remainder of the measures will use Customer’s Standard Practice as the Baseline. The refrigeration energy consumption will be modeled using either an 8,760 hour energy simulation program or a detailed spreadsheet analysis that uses 8,760 weather data, or a combination of the two. The general methodology outlined above is appropriate for this building type, since the entire building will be served by a refrigeration system, and almost none of the building will be served by a standard HVAC system. The following additional requirements will apply for the project EAc1 submittal: Both the budget and proposed design for the refrigerated warehouse should be modeled in an hourly building simulation program (like eQUEST-r), and all efficiency measures that can be documented within the simulation program must be documented using that program. For any efficiency measures that cannot specifically be modeled in the building simulation program, the project may use spreadsheet calculations or other industry software. If spreadsheets are used for documenting energy efficiency measures, sufficient information must be provided to verify that the calculations accurately document the hourly energy consumption of the equipment All exceptional calculations must be thoroughly documented in accordance with the ASHRAE 90.1-2004 exceptional calculation method: the major calculation inputs and assumptions must be clearly documented, and sufficient information must be provided to verify that the calculations accurately document the hourly energy consumption of the equipment. No changes may be made to input parameter values specified by ASHRAE 90.1-2004 Appendix G. For example, occupant sensor lighting controls are allowed a 10% credit per Table G3.2, so no more credit than this may be taken for these controls. Also, no schedule changes can be made to vary the budget from the proposed case unless specifically allowed in Appendix G. Customer’s Standard Practice alone is not sufficient to document the Baseline energy parameters using the exceptional calculation method. The documentation should include sufficient justification to show that the modeled Baseline Case is industry standard practice for new construction of refrigerated warehouses. When referencing a Source (such as the SBD/ Case Report) to document a baseline case parameter or to document the validity of a proposed efficiency measure, please include excerpts of the source to verify that the referenced method is being used.
The applicant is requesting clarification regarding the modeling of a refrigerated warehouse, where refrigeration will comprise the single largest energy end-use in the project. Specifically, the applicant requests verification that the following compliance path is appropriate for a Refrigerated Warehouse building 1. ASHRAE 90.1-2004 lighting requirements will be used 2. Insulation for the Baseline Case Freezers and Loading Dock will be stricter than ASHRAE 90.1-2004, and will comply with ASHRAE Design Essentials, Table 2, p. 50. 3. Refrigeration efficiency measures will be modeled identically in the Baseline and Proposed energy models, and then documented using the Exceptional Calculation Methodology. Most of these measures will use the SBD / Case report as a Baseline, while the remainder of the measures will use Customer\'s Standard Practice as the Baseline. The refrigeration energy consumption will be modeled using either an 8,760 hour energy simulation program or a detailed spreadsheet analysis that uses 8,760 weather data, or a combination of the two. The general methodology outlined above is appropriate for this building type, since the entire building will be served by a refrigeration system, and almost none of the building will be served by a standard HVAC system. The following additional requirements will apply for the project EAc1 submittal: Both the budget and proposed design for the refrigerated warehouse should be modeled in an hourly building simulation program (like eQUEST-r), and all efficiency measures that can be documented within the simulation program must be documented using that program. For any efficiency measures that cannot specifically be modeled in the building simulation program, the project may use spreadsheet calculations or other industry software. If spreadsheets are used for documenting energy efficiency measures, sufficient information must be provided to verify that the calculations accurately document the hourly energy consumption of the equipment All exceptional calculations must be thoroughly documented in accordance with the ASHRAE 90.1-2004 exceptional calculation method: the major calculation inputs and assumptions must be clearly documented, and sufficient information must be provided to verify that the calculations accurately document the hourly energy consumption of the equipment. No changes may be made to input parameter values specified by ASHRAE 90.1-2004 Appendix G. For example, occupant sensor lighting controls are allowed a 10% credit per Table G3.2, so no more credit than this may be taken for these controls. Also, no schedule changes can be made to vary the budget from the proposed case unless specifically allowed in Appendix G. Customer\'s Standard Practice alone is not sufficient to document the Baseline energy parameters using the exceptional calculation method. The documentation should include sufficient justification to show that the modeled Baseline Case is industry standard practice for new construction of refrigerated warehouses. When referencing a Source (such as the SBD/ Case Report) to document a baseline case parameter or to document the validity of a proposed efficiency measure, please include excerpts of the source to verify that the referenced method is being used.