ASHRAE-90.1-2022- - Page 314

Extracted Content

Table G3.1 Modeling Requirements for Calculating Proposed Building Performance and  Baseline Building Performance (Continued)

Proposed Building Performance Baseline Building Performance

11. Service Water-Heating Systems (continued)

12. Receptacle and Other Loads

Receptacle and process loads, such as those for office and other equipment, shall be estimated based on the building area type or space type category and shall be assumed to be identical in the proposed design and baseline building design, except as specifically approved by the rating authority only when quantifying performance that exceeds the requirements of Standard 90.1 but not when the Performance Rating Method is used as an alternative path for minimum standard compliance in accordance with Section 4.2.1.1. These loads shall always be included in simulations of the building. These loads shall be included when calculating the proposed building performance and the baseline building performance as required by Section G1.2.1. Exception: When receptacle controls installed in spaces where no t required by Section 8.4.2 are included in the proposed buildin g design, the hourly receptacle shall be reduced as follows: RPC = RC × 10% where RPC = receptacle power credit EPS = EPS × (1 – RPC) pro bas RC = percentage of all controlled receptacles EPS = baseline equipment power hourly schedule (fraction) bas EPS = proposed equipment power hourly schedule (fraction) pro a. Where power and other systems covered by Sections 8 and 10 hav e been designed and submitted with design documents, those sys- tems shall be determined in accordance with Sections 8 and 10. b. Where power and other systems covered by Sections 8 and 10 hav e not been submitted with design documents, those systems shal l comply with but not exceed the requirements of those sections.	Motors shall be modeled as having the efficiency ratings found in Table G3.9.1 Other systems covered by Section 10 and miscellaneous loads shall be modeled as identical to those in the proposed design, including schedules of operation and control of the equipment. Energy used for cooking equipment, receptacle loads, computers, medical or laboratory equipment, and manufacturing and industrial process equipment not specifically identified in the standard power and energy rating or capacity of the equipment shall be identical between the proposed building performance and the baseline building performance. Receptacle schedules shall be the same as the proposed design before the receptacle power credit is applied. Exception: When quantifying performance that exceeds the require- ments of Standard 90.1 (but not when using the Performance Rat- ing Method as an alternative path for minimum standar d compliance per Section 4.2.1.1) variations of the power require- ments, schedules, or control sequences of the equipment modeled in the baseline building design from those in the proposed design shal l be approved by the rating authority based on documentatio n described in Table G3.1(1), or that the equipment installed in th e proposed design represents a significant verifiable departure fro m documented current conventional practice. The burden of this docu- mentation is to demonstrate that accepted conventional practic e would result in baseline building equipment different from that installed in the proposed design. Occupancy and occupancy sched- ules shall not be changed.
13. Modeling Limitations to the Simulation Program
If the_simulation program_ cannot model a component or_system_ included in the_proposed design_ explicitly, substitute a thermodynamically similar component model that can approximate the expected performance of the component that cannot be modeled explicitly.	Same as_proposed design_.

14. Exterior Conditions

312 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)