Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-403327 - Table C403.3.2(7)-Heat rejection equipment-Minimum efficiency requirements

Current through Register Vol. 24-14, July 15, 2024
Table C403.3.2(7)
Heat Rejection Equipment-Minimum Efficiency
				Requirementsi
Equipment
						  Typea
Total System Heat Rejection
						  Capacity at Rated Conditions
Subcategory or Rating
						  Conditionh
Performance
						  Requiredb,c,d,f,g
Test
						  Procedurea,e
Propeller or axial fan open-circuit cooling
						  towers
All
95°F Entering Water
85°F Leaving Water
75°F Entering wb
[GREATER THAN EQUAL TO] 40.2 gpm/hp
CTI ATC-105 and CTI STD-201 RS
Centrifugal fan open circuit cooling towers
All
95°F Entering Water
85°F Leaving Water
75°F Entering wb
[GREATER THAN EQUAL TO] 20.0 gpm/hp
CTI ATC-105 and CTI STD-201 RS
Propeller or axial fan closed-circuit cooling
						  towers
All
102°F Entering Water
90°F Leaving Water
75°F Entering wb
[GREATER THAN EQUAL TO] 16.1 gpm/hp
CTI ATC-105S
and CTI STD-201 RS
Centrifugal closed-circuit cooling towers
All
102°F Entering Water
90°F Leaving Water
75°F Entering wb
[GREATER THAN EQUAL TO] 7.0 gpm/hp
CTI ATC-105S
and CTI STD-201 RS
Propeller or axial fan dry coolers (air-cooled fluid
						  coolers)
All
115°F Entering Water
105°F Leaving Water
95°F Entering wb
[GREATER THAN EQUAL TO] 4.5 gpm/hp
CTI ATC-106
Propeller or axial fan evaporative condensers
All
R-448A Test Fluid
165°F Entering Gas Temperature
105°F Condensing Temperature
75°F Entering wb
[GREATER THAN EQUAL TO] 160,000 Btu/h ·
						  hp
CTI ATC-106
Propeller or axial fan evaporative condensers
All
Ammonia Test Fluid
140°F Entering Gas Temperature
96.3°F Condensing Temperature
75°F Entering wb
[GREATER THAN EQUAL TO] 134,000 Btu/h ·
						  hp
CTI ATC-106
Centrifugal fan evaporative condensers
All
R-448A Test Fluid
165°F Entering Gas Temperature
105°F Condensing Temperature
75°F Entering wb
[GREATER THAN EQUAL TO] 137,000 Btu/h ·
						  hp
CTI ATC-106
Centrifugal fan evaporative condensers
All
Ammonia Test Fluid
140°F Entering Gas Temperature
96.3°F Condensing Temperature
75°F Entering wb
[GREATER THAN EQUAL TO] 110,000 Btu/h ·
						  hp
CTI ATC-106
Air cooled condensers
All
125°F Condensing Temperature
R-22 Test Fluid
190°F Entering Gas Temperature
15°F Subcooling
95°F Entering db
[GREATER THAN EQUAL TO] 176,000 Btu/h ·
						  hp
AHRI 460
For SI: °C = [(°F) - 32]/1.8, L/s · kW =
				(gpm/hp)/(11.83), COP = (Btu/h · hp)/(2550.7).
db = dry-bulb temperature, °F.
wb = wet-bulb temperature, °F.
a Chapter 6 contains a complete
				specification of the referenced standards, which include test procedures,
				including the reference year version of the test procedure.
b For purposes of this table,
				open-circuit cooling tower performance is defined as the water-flow rating of
				the tower at the thermal rating condition listed in the table divided by the
				fan motor nameplate power.
c For purposes of this table,
				closed-circuit cooling tower performance is defined as the water-flow rating of
				the tower at the thermal rating condition divided by the sum of the fan motor
				nameplate power and the integral spray pump motor nameplate power.
d For purposes of this table, dry-cooler
				performance is defined as the process water-flow rating of the unit at the
				thermal rating condition listed in the table divided by the total fan motor
				nameplate power of the unit, and air-cooled condenser performance is defined as
				the heat rejected from the refrigerant divided by the total fan motor nameplate
				power of the unit.
e The efficiencies and test procedures
				for both open- and closed-circuit cooling towers are not applicable to hybrid
				cooling towers that contain a combination of separate wet and dry heat exchange
				sections. The certification requirements do not apply to field-erected cooling
				towers.
f All cooling towers shall comply with
				the minimum efficiency listed in the table for that specific type of tower with
				the capacity effect of any project-specific accessories and/or options included
				in the capacity of the cooling tower.
g For purposes of this table,
				evaporative condenser performance is defined as the heat rejected at the
				specified rating condition in the table, divided by the sum of the fan motor
				nameplate power and the integral spray pump nameplate power.
h Requirements for evaporative
				condensers are listed with ammonia (R-717) and R-448A as test fluids in the
				table. Evaporative condensers intended for use with halocarbon refrigerants
				other than R-448A must meet the minimum efficiency requirements listed above
				with R-448A as the test fluid. For ammonia, the condensing temperature is
				defined as the saturation temperature corresponding to the refrigerant pressure
				at the condenser entrance. For R-448A, which is a zeotropic refrigerant, the
				condensing temperature is defined as the arithmetic average of the dew point
				and the bubble point temperatures corresponding to the refrigerant pressure at
				the condenser entrance.
i This table is a replica of ASHRAE 90.1
				Table 6.8.1-7 Performance Requirements for Heat Rejection Equipment-Minimum
				Efficiency Requirements.