ASHRAE-90.1-2022- - Page 212
Extracted Content
space -cooling equipment performance tests (Section 5.3), space -heating equipment performance tests (Section 5.4), and air-side HVAC equipment analytical verification tests (Section 5.5), along with the associated reporting (Section 6).
12.4.1.4.2 The test results and modeler reports shall be posted on a publicly available website and shall include the test results of the simulation program and input files used for generating results along with the results of the other simulation programs included in ASHRAE Standard 140, Annexes B8 and B16. The modeler report in Standard 140, Annex A2, Attachment A2.7, shall be completed for results exceeding the maximum or falling below the minimum of the reference values and for omitted results.
12.4.1.4.3 The testing shall be performed for the version of the simulation program used to calculate the design energy cost and energy cost budget .
Informative Notes:
- There are no pass/fail criteria established by this requirement.
- Based on the Section 3.2 definition, simulation program includes the simulation engine and the corresponding user interface. The testing of a simulation program only meets the requirements of Section 12.4.1.4 for that simulation program and cannot be used as proxy for documenting compliance of another simulation program that uses the same simulation engine .
12.4.2 Climatic Data. The simulation program shall perform the simulation using hourly values of climatic data, including temperature, humidity, solar radiation, and wind speed and direction from representative climatic data, for the site in which the proposed design is to be located. For locations for which several climatic data sources are available or where weather data are not available, the designer shall select available weather data that best represent the climate at the construction site . The selected weather data shall be approved by the authority having jurisdiction .
12.4.3 Renewable, Recovered, and Purchased Energy
12.4.3.1 On-Site Renewable Energy and Site-Recovered Energy. Site-recovered energy shall not be considered purchased energy and shall be subtracted from the proposed design energy consumption prior to calculating the design energy cost . On-site renewable energy shall be subtracted from the proposed design energy consumption prior to calculating the design energy cost, provided that the building owner
a. owns the on-site renewable energy system, b. has signed a lease agreement for the on-site renewable energy system for at least 15 years, or c. has signed a contractual agreement to purchase energy generated by the on-site renewable energy system
for at least 15 years.
The reduction in design energy cost associated with on-site renewable energy that exceeds the on-site renewable energy required by Section 10.5.1.1 shall be no more than 5% of the calculated energy cost budget .
On-site renewable energy included in the budget building design shall be subtracted from the budget building design energy consumption prior to calculating the energy cost budget.
12.4.3.2 Annual Energy Costs. The design energy cost and energy cost budget shall be determined using rates for purchased energy (such as electricity, gas, oil, propane, steam, and chilled water) that are approved by the adopting authority . Where on-site renewable energy or site-recovered energy is in excess of what is required in the budget building design by Table 12.5.1, the budget building design shall be based on the energy source used as the backup energy source, or electricity if no backup energy source has been specified. Where the proposed design includes on-site electricity generation systems other than on-site renew- able energy systems, the baseline design shall include the same generation systems excluding its site- recovered energy .
12.4.4 Compliance Calculations. The design energy cost and energy cost budget shall be calculated using
a. the same simulation program, b. the same weather data, and c. the same purchased energy rates .
12.4.5 Exceptional Calculation Methods. When the simulation program does not model a design, material, or device, an exceptional calculation method shall be used as approved by the authority having jurisdic- tion to demonstrate compliance with Section 12.
Where there are multiple designs, materials, or devices that the simulation program does not model, each shall be calculated separately and exceptional savings determined for each. All applications for approval of an exceptional method shall include the following:
210 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)