ASHRAE-90.1-2022- - Page 177

Extracted Content

a. Piping section average velocity: Compressor room interconnection and main header piping shall be sized

so that at coincident peak flow conditions the average velocity in the segment of pipe is no greater than 20 ft/s. Compressor room interconnection and main header piping are the pipes that deliver compressed air from the compressor outlets to the inlet to the distribution piping . Each segment of distribution and service piping shall be sized so that at coincident peak flow conditions the average velocity in the segment of pipe is no greater than 30 ft/s. Distribution piping is pipes that deliver compressed air from the compressor room interconnection piping or main header piping to the service line piping . b. Piping total pressure drop : Piping shall be designed such that piping frictional pressure loss at coincident

peak loads are less than 5% of operating pressure between the compressor and connection at point of use, prior to any end-use regulators.

10.4.7 Whole-Building Energy Monitoring. Measurement devices shall be installed at the building site to monitor the energy use of each new building .

10.4.7.1 Monitoring. Measurement devices shall be installed to monitor the building use of the following types of energy supplied by a utility, energy provider, or plant that is not within the building :

a. Natural gas b. Fuel oil c. Propane d. Steam e. Chilled water f. Hot water

10.4.7.2 Recording and Reporting. The energy use of each building on the building site shall be recorded at a minimum of every 60 minutes and reported at least hourly, daily, monthly, and annually. The system shall be capable of maintaining all data collected for a minimum of 36 months and creating user reports showing at least hourly, daily, monthly, and annual energy consumption and demand .

Exceptions to 10.4.7.1 and 10.4.7.2:

1. Buildings or additions less than 25,000 ft [2] .
2. Individual tenant spaces less than 10,000 ft [2] .
3. Dwelling units .
4. Residential buildings with less than 10,000 ft [2] of common area.
5. Fuel used for on- site emergency equipment .

10.4.8 Pumps. Clean water pumps meeting the following criteria shall comply with the requirements shown in Table 10.8-6:

a. A flow rate of 25 gal/min or greater at its best efficiency point (BEP) at full impeller diameter b. Maximum head of 459 ft at its BEP at full impeller diameter and the number of stages required for testing c. Design temperature range from 14°F to 248°F d. Designed to operate with either

1. a 2- or 4-pole induction motor or

2. a noninduction motor with a speed of rotation operating range that includes speeds of rotation between 2880 and 4320 rpm and/or 1440 and 2160 rpm, and

3. in either (1) or (2), the driver and impeller must rotate at the same speed e. For submersible turbine pumps, a 6 in. or smaller bowl diameter f. For end-suction close-coupled pumps and end-suction frame-mounted/own bearings pumps, specific speed less than or equal to 5000 rpm when calculated using U.S. customary units Exceptions to 10.4.8: The standards in this section do not apply to the following pumps :

4. Fire pumps .

5. Self-priming pump .

6. Prime-assist pumps .

7. Magnet-driven pumps .

8. Pumps designed to be used in a nuclear facility subject to 10 CFR 50, “Domestic Licensing of Production and Utilization Facilities.”

9. Pumps meeting the design and construction requirements set forth in U.S. Military Specification MIL-P-17639F, “Pumps, Centrifugal, Miscellaneous Service, Naval Shipboard Use” (as amended); MIL-P-17881D, “Pumps, Centrifugal, Boiler Feed, (Multi-Stage)” (as amended); MIL-P-17840C, “Pumps, Centrifugal, Close-Coupled, Navy Standard (For Surface Ship Application)” (as amended); MIL-P-18682D, “Pump, Centrifugal, Main Condenser Circulating, Naval Shipboard”

ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 175