ASHRAE-90.1-2022- - Page 388

Extracted Content

Area VarDCV = fraction of block floor area with variable sensor-based DCV control Area ON-OFF = fraction of block floor area with only occupied standby control as defined in Section 6.5.3.8 that does not also have variable sensor-based demand control ventilation .

L4.3 Simulation of the TSPR Reference Building Design. The TSPR reference building design shall be configured and analyzed as specified in this section.

L4.3.1 Non-HVAC Inputs. Utility rates, blocks, HVAC zones, building use types, schedules, occupant density, heat gains, building envelope components, lighting power, and miscellaneous equipment loads shall be modeled the same as in the proposed design.

Elevators, service water-heating equipment, and on-site renewable energy systems shall not be modeled; same as in the proposed design .

L4.3.2 HVAC Equipment. The TSPR reference building design HVAC equipment consists of separate space conditioning systems and DOASs as described in Tables L4.3.2-1 through L4.3.2-3 for the appropriate building use types. Variable-speed drive fan and pump power shall be modeled using parameters in Tables L4.3.2-1. HVAC equipment shall be modeled at minimum efficiency based on specified efficiency metrics in Tables L4.3.2-1 through L4.3.2-3. Where available in Normative Appendix G, equipment -type-specific partload performance adjustments shall be used; otherwise, typical part-load performance adjustments shall be used.

L5. TSPR METRIC FOR SITE HVAC ENERGY INPUT

For purposes of calculating TSPR for the proposed design and the TSPR reference building design, the calculated HVAC energy input of each building project energy source shall be converted to cost using the energy cost prices from Table L5-1.

Informative Notes:

1. The blended heating prices in Table L5-1 that are used for fossil fuels are not intended to represent actual average prices, but to represent a consistent blended price per 1000 Btu used. This will avoid requiring the simulation program to run the reference systems with a fossil fuels type that matches the proposed building . The common price per site fuel Btu allows proposed system effi- ciency to be properly compared with the reference system .

2. Informative Tables L5-2 through L5-5 include values for alternate energy input metrics that may be adopted by a jurisdiction. If so, the jurisdiction should replace the TSPR energy input of energy cost in Section L5 with the alternate metric and should include appropriate metric values from Informative Table L5-2 into Table L5-1. The jurisdiction should replace the MPF values in Table 6.6.2.2 with one of the following:

        - For carbon emissions, replace Table 6.6.2.2 MPF values with those in Informative Table L5-3.
   

This table allows users to compare the quantity of carbon dioxide emissions generated by the proposed design building to the target building . For compliance purposes, it is intended for use in voluntary standards and in jurisdictions where the use of a carbon emissions metric is not preempted by U.S. federal law.

        - For source _energy_, replace Table 6.6.2.2 MPF values with those in Informative Table L5-4.

        - For _site_ _energy_, replace Table 6.6.2.2 MPF values with those in Informative Table L5-5.

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