THE EFFICIENCY OF AIR DIFFUSION (E Z ) OF THE HIGH INDUCTION DAL 358 DIFFUSER REACHES. E z = 1.1

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1 THE EFFICIENCY OF AIR DIFFUSION (E Z ) OF THE HIGH INDUCTION DAL 358 DIFFUSER REACHES E z = 1.1

2 2 National Building Code Requirements - Canada 2010 (NBC) Section Required Ventilation 2) Except in storage garages and repair garages covered by Article , the rates at which outdoor air is supplied in buildings by ventilation systems shall be not less than the rates required by ANSI/ASHRAE 62.1, Ventilation for Acceptable Indoor Air Quality.

3 3 ASHRAE 62.1 outdoor airflow calculations Standard ANSI/ASHRAE recommends a quantity of outdoor airflow calculated based on the number of occupants and the surface area using the values in table In order to determine the total outdoor airflow, you must : 1. Calculate the quantity of outdoor airflow as follows : Vbz = Rp Pz + Ra Az where Rp : outdoor airflow rate per person Pz : zone population Ra : outdoor airflow rate per unit area Az : zone floor area 2. Select the zone air distribution effectiveness Ez, Table or according to ASHRAE 129 test (Measuring Air-Change Effectiveness) 3. Calculate the total outdoor airflow: Voz = Vbz / Ez

4 4 ASHRAE 62.1 Calculate outdoor airflow

5 5 DAL 358 and DAL 359 diffuser tests with ASHRAE 129

6 6 Testing Conditions Typical Configuration

7 7 Testing Conditions : layout zone

8 8 Testing Conditions : diffusers location 2 diffusers Peripheral zone 2 diffusers Central zone

9 Testing Conditions HVAC System 9

10 Testing Conditions : Automated tracer gas system 10 The NRC is the only laboratory in Canada that is equiped with a tracer gas system

11 11 Testing Conditions : data instruments

12 12 Testing Conditions : location of instruments

13 Testing diffusers 13

14 14 Example of testing results

15 Test results 15

16 16 Final results

17 Conclusion 17 ² ² ²

18 Example of application 1 Place Ville-Marie, Montreal Number of levels 43 Area per level 36 000 ft. Ca.

18 18 Example of application 1 Place Ville-Marie, Montreal Number of levels 43 Area per level ft. Ca. Total area ft. Ca. Zone population Vbz = Rp Pz + Ra Az = 5 cfm /pers x pers.+ 0,06 cfm/ft² x ft² = cfm

19 Example of application 1 Place Ville-Marie, Montreal Vbz = 155 880 cfm V oz = V

effectiveness) 0,8 1,1 V oz (Zone outdoor airflow) 192 150 cfm 139 745 cfm Heating /

Dehumidifying costs $0,8 / cfm $0,8 / cfm Annual cost (6$ x V oz ) $1 152 900 $838

19 19 Example of application 1 Place Ville-Marie, Montreal Vbz = cfm V oz = V bz / E z Conventional diffusers High induction diffuser DAL358 E z (Air distribution effectiveness) 0,8 1,1 V oz (Zone outdoor airflow) cfm cfm Heating / Cooling costs $2,8 / cfm $2,8 / cfm Humidifying costs $2,4 / cfm $2,4 / cfm Dehumidifying costs $0,8 / cfm $0,8 / cfm Annual cost (6$ x V oz ) $ $ Energy savings (%) - 27% Savings ($) / year - $ Savings ($) / 5 years - $

20 Occupyrcy Category Office (2 persons) Pharmacy (20 persons) Librairy Université Sherbrooke Faculté de Droit (88 persons) Store Ex : Bouclair (20 persons) Nail salon (10 persons) Pet shop (10 persons) Gym Ex : Complexe Thibault (40 x100 ) (20 persons) Energy savings through DAL358 and DAL 359 Annual savings with the DAL 358 according to ASHRAE 62.1 Size ( 120 ft 2 /pers) 15x16 5 cfm/pers= 240 ft 2 10 cfm 100 x cfm/pers= ft cfm ft 2 1 pers/400 ft2 = 88 pers. Simulation cfm/pers. cfm/ft 2 E z =0.8 Standard diffuser Costs 30$ 5 cfm/pers= 440 cfm ft cfm/pers= 150 cfm ft 2 20 cfm/pers= 200 cfm ft cfm/pers= 75 cfm ft 2 20 cfm/pers = 400 cfm x0.06= 14.4 cfm x0.18= cfm x0.12= cfm x0.12= 720 cfm x0.12= 240 cfm x0.12= 600 cfm x0.06= 240 cfm 24.4 cfm 0.8 = 30.5 cfm O/A cfm 0.8 = cfm O/A cfm 0.8 = cfm O/A 870 cfm 0.8 = cfm O/A 440 cfm 0.8 = 550 cfm O/A 675 cfm 0.8 = cfm O/A 640 cfm 0.8 = 800 cfm O/A Diffuser DAL 358 E z =1.1 Costs DN 600 : 219$ DN 500 : 164$ 24.4 cfm 1.1 = 22.2 cfm O/A cfm 1.1 = cfm O/A cfm 1.1 = cfm O/A 870 cfm 1.1 = cfm O/A 440 cfm 1.1 = 400 cfm O/A 675 cfm 1.1 = cfm O/A 640 cfm 1.1 = 582 cfm O/A Savings generated/year/diffuser 8.3 cfm x *6$ = Savings of 50$/diffuseur cfm x *6$ = Savings of 3 888$/yr DAL358 DN 600=400 cfm ft cfm= $/yr 25 diffusers= $ / diffusers cfm x *6$ = Savings of 9 246$/yr DAL358 DN 500=280 cfm ft cfm= $/yr 121 diffusers= 76 $ / diffusers cfm x *6$ = Savings of $/yr DAL358 DN 600=400 cfm ft cfm= $/yr 15 diffusers= $ / diffusers 150 cfm x *6$ = Savings of 900$/yr DAL358 DN 500=280 cfm ft cfm= 7 900$/yr 7 diffusers= $ / diffusers 230 cfm x *6$ = Savings of 1 380$/yr DAL358 DN 500=280 cfm ft cfm= $/yr 18 diffusers= 76.7 $ / diffusers 218 cfm x *6$ = Savings of 1 308$/yr DAL358 DN 600=400 cfm 20 Payback NAD 219$ 50$ = 4.4 years 219$ 155.5$ = 1.4 years 164$ 76$ = 2.2 years 219$ 118.6$ = 1.8 years 164$ 128.6$ =1.3 years 164$ 76.7$ = 2.1 years 219$ 131$ = 1.8 years

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