the efficiency of air diffusion (ez of the high … · 2 national building code requirements -...

Ez = 1.1

THE EFFICIENCY OF AIR DIFFUSION (EZ)OF THE HIGH INDUCTION DAL 358 DIFFUSER

REACHES

2

National Building Code Requirements -Canada 2010 (NBC)

Section 6.2.2.1. Required Ventilation

2) Except in storage garages and repair garages coveredby Article 6.2.2.3., the rates at which outdoor air is suppliedin buildings by ventilation systems shall be not less thanthe rates required by ANSI/ASHRAE 62.1, “Ventilation forAcceptable Indoor Air Quality”.

Energy savings through DAL358 and DAL 359

Energy savings through DAL358 and DAL 359 3

Standard ANSI/ASHRAE 62.1-2016 recommends a quantity of outdoorairflow calculated based on the number of occupants and the surface area using the values in table 6.2.2.1.

In order to determine the total outdoor airflow, you must :

1. Calculate the quantity of outdoor airflow as follows :

Vbz = Rp · Pz + Ra · AzwhereRp : outdoor airflow rate per personPz : zone population Ra : outdoor airflow rate per unit areaAz : zone floor area

2. Select the zone air distribution effectiveness Ez, Table 6.2.2.2 or according to ASHRAE 129 test (Measuring Air-Change Effectiveness)

3. Calculate the total outdoor airflow: Voz = Vbz / Ez

ASHRAE 62.1 – outdoor airflow calculations


ASHRAE 62.1 – Calculate outdoor airflow

DAL 358 and DAL 359 diffuser tests with ASHRAE 129


Testing ConditionsEnergy savings through DAL358 and DAL 359 6

Typical Configuration

Testing Conditions : layout zone

7Energy savings through DAL358 and DAL 359

Testing Conditions : diffusers location


2 diffusersPeripheral zone

2 diffusersCentral zone

Testing Conditions HVAC System9Energy savings through DAL358 and DAL 359

10

Testing Conditions : Automated tracer gas system

The NRC is the only laboratory in Canada that is equiped witha tracer gas system


Testing Conditions : data instruments


Testing Conditions : location of instruments


Testing diffusers13Energy savings through DAL358 and DAL 359

Example of testing results


15

Test results


Final results


Conclusion 17

²²²


18

Example of application1 Place Ville-Marie, Montreal

Number of levels43Area per level36 000 ft. Ca.Total area1 548 000 ft. Ca.Zone population12 600

Vbz = Rp · Pz + Ra · Az

= 5 cfm /pers x 12 600 pers.+ 0,06 cfm/ft² x 1 548 000 ft² = 155 880 cfm


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Voz = Vbz / Ez High induction diffuser DAL358

Ez (Air distribution effectiveness) 0,8 1,1

Voz (Zone outdoor airflow) 192 150 cfm 139 745 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 Voz ) $1 152 900 $838 470

Energy savings (%) - 27%

Savings ($) / year - $314 430

Savings ($) / 5 years - $1 572 150

Conventionaldiffusers

Vbz = 155 880 cfm


Example of application1 Place Ville-Marie, Montreal

Annual savingswith the DAL 358 accordingto ASHRAE 62.1

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Simulation

OccupyrcyCategory

Size(≈120ft2 /pers) cfm/pers. cfm/ft2

StandarddiffuserEz=0.8

Costs ≈30$

DiffuserDAL358Ez=1.1Costs ≈

DN600 :219$DN500 :164$

Savingsgenerated/year/diffuser

PaybackNAD

Office(2persons)

15x16240ft2

5cfm/pers=10cfm

0.06240x0.06=14.4cfm

24.4cfm÷ 0.8=

30.5cfm O/A

24.4cfm÷ 1.1=

22.2cfm O/A

8.3cfm x*6$=Savings of50$/diffuseur

219$÷ 50$=

4.4years

Pharmacy(20persons)

100x10010000ft2

5cfm/pers=100cfm

0.1810000x0.18=1800cfm

1900cfm÷ 0.8=

2375cfm O/A

1900cfm÷ 1.1=

1727cfm O/A

648.6cfm x*6$=Savings of3888$/yr

DAL358DN600=400cfm219$÷155.5$=

1.4years10000ft2÷400cfm=253888$/yr÷25diffusers=155.52$/

diffusers

LibrairyUniversitéSherbrooke

FacultédeDroit(88persons)

34000ft2

1pers/400ft2=88pers.0.12

34000x0.12=4080cfm

4520cfm÷ 0.8=

5650cfm O/A

4520cfm÷ 1.1=

4109cfm O/A

1541cfm x*6$=Savings of9246$/yr

DAL358DN500=280cfm164$÷ 76$=

2.2years5cfm/pers=440cfm

34000ft2÷280cfm=1219246$/yr÷121diffusers=76$/

diffusers

StoreEx :Bouclair(20persons)

6000ft2 7.5cfm/pers=150cfm

0.126000x0.12=720cfm

870cfm÷ 0.8=

1087.5cfm O/A

870cfm÷ 1.1=

790.9cfm O/A

296.6cfm x*6$=Savings of1779.6$/yrDAL358DN600=400cfm

219$÷ 118.6$=

1.8years6000ft2÷400cfm=151779.6$/yr÷15diffusers=118.6$/

diffusers

Nail salon(10persons)

2000ft2 20cfm/pers=200cfm

0.122000x0.12=240cfm

440cfm÷ 0.8=

550cfm O/A

440cfm÷ 1.1=

400cfm O/A


DAL358DN500=280cfm

164$÷ 128.6$

=1.3years

2000ft2÷280cfm=7900$/yr÷7diffusers=128.6$/

diffusers

Pet shop(10persons)

5000ft2 7.5cfm/pers=75cfm

0.185000x0.12=600cfm

675cfm÷ 0.8=

843.7cfm O/A

675cfm÷ 1.1=

613.7cfm O/A


DAL358DN500=280cfm164$

÷ 76.7$=

2.1years5000ft2÷280cfm=181380$/yr÷18diffusers=76.7$/

diffusers

GymEx :ComplexeThibault

(40’x100’)(20persons)

4000ft2

20cfm/pers

=400cfm

0.064000x0.06=240cfm

640cfm÷ 0.8=

800cfm O/A

640cfm÷ 1.1=

582cfm O/A


DAL358DN600=400cfm

219$÷ 131$=

1.8years


the efficiency of air diffusion (ez of the high … · 2 national building code requirements -...

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