ASHRAE-90.1-2022- - Page 377

Extracted Content

L2.1.5 Calculating TSPR. TSPRp shall be calculated according to Equation L-1:

TSPRr

= -------------------------------Loads r HVACinput p

(L-1)

where

Loads r = sum of the annual heating and cooling loads for the TSPR reference building design met by the building HVAC system, thousand Btu.

HVACinput p = sum of the annual HVAC energy input for heating, cooling, fans, energy recovery, pumps, and heat rejection for the proposed design . The HVAC energy input units shall be in accordance with Section L5.

TSPRr shall be calculated according to Equation L-2:

TSPRr

= -----------------------------Loads r - HVACinput r

(L-2)

where

Loads r = sum of the annual heating and cooling loads for the TSPR reference building design met by the building HVAC system, thousand Btu.

HVACinput r = sum of the annual HVAC energy input for heating, cooling, fans, energy recovery, pumps, and heat rejection for the TSPR reference building design. The HVAC energy input units shall be in accordance with Section L5.

Informative Note: The annual HVAC energy uses calculated using the Mechanical System Performance Rating Method are not predictions of whole- building energy consumption for an actual proposed building after construction . Actual experience will differ from these calculations due to variations such as occupancy, building operation and maintenance, weather, energy use of systems and building areas not covered by this procedure, changes in energy prices between design of the building and occupancy, and the precision of the calculation tool.

L2.1.6 TSPR Submittals. Where TSPRp and TSPRr are used to demonstrate compliance in accordance with Section 6.6.2, documentation shall be provided to the building official including the following:

a. A compliance report, as outlined in Section L3.4, generated by the simulation program. b. A mapping of the actual building HVAC component characteristics and those simulated in the proposed

design showing how individual pieces of HVAC equipment identified above have been combined into average inputs as required by the simulation program, including (but not limited to) the following:

1. Fans
2. Hydronic pumps
3. Air handlers
4. Packaged cooling equipment
5. Furnaces
6. Heat pumps
7. Boiler s
8. Chillers
9. Heat-rejection equipment (open- and closed-circuit cooling towers; dry coolers)
10. Electric resistance coils
11. Condensing units
12. Motors for fans and pumps
13. Energy recovery devices c. For each piece of equipment identified in item (b), include the following along with the units specified in

Table L2.2.3 as applicable:

1. Equipment name or tag consistent with that found on the design documents
2. Rated Efficiency level, full-load efficiency as rated in Section 6.8
3. Rated capacity
4. Where not provided by the simulation program report in item (a), documentation of the calculation of any weighted equipment efficiencies input into the program.

ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 375