THE EFFICIENCY OF AIR DIFFUSION (EZ OF THE HIGH … · 2 National Building Code Requirements -...
Transcript of THE EFFICIENCY OF AIR DIFFUSION (EZ OF THE HIGH … · 2 National Building Code Requirements -...
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Ez = 1.1
THE EFFICIENCY OF AIR DIFFUSION (EZ)OF THE HIGH INDUCTION DAL 358 DIFFUSER
REACHES
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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
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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
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Energy savings through DAL358 and DAL 359 4
ASHRAE 62.1 – Calculate outdoor airflow
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DAL 358 and DAL 359 diffuser tests with ASHRAE 129
Energy savings through DAL358 and DAL 359 5
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Testing ConditionsEnergy savings through DAL358 and DAL 359 6
Typical Configuration
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Testing Conditions : layout zone
7Energy savings through DAL358 and DAL 359
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Testing Conditions : diffusers location
Energy savings through DAL358 and DAL 359 8
2 diffusersPeripheral zone
2 diffusersCentral zone
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Testing Conditions HVAC System9Energy savings through DAL358 and DAL 359
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Testing Conditions : Automated tracer gas system
The NRC is the only laboratory in Canada that is equiped witha tracer gas system
Energy savings through DAL358 and DAL 359
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Testing Conditions : data instruments
11Energy savings through DAL358 and DAL 359
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Testing Conditions : location of instruments
12Energy savings through DAL358 and DAL 359
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Testing diffusers13Energy savings through DAL358 and DAL 359
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Example of testing results
14Energy savings through DAL358 and DAL 359
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Test results
Energy savings through DAL358 and DAL 359
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Final results
16Energy savings through DAL358 and DAL 359
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Conclusion 17
²²²
Energy savings through DAL358 and DAL 359
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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
Energy savings through DAL358 and DAL 359
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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 - $1 572 150
Conventionaldiffusers
Vbz = 155 880 cfm
Energy savings through DAL358 and DAL 359
Example of application1 Place Ville-Marie, Montreal
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Annual savingswith the DAL 358 accordingto ASHRAE 62.1
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Simulation
OccupyrcyCategory
Size(≈120ft2 /pers) cfm/pers. cfm/ft2
StandarddiffuserEz=0.8
Costs ≈30$
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
150cfm x*6$=Savings of900$/yr
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
230cfm x*6$=Savings of1380$/yr
DAL358DN500=280cfm164$
÷ 76.7$=
2.1years5000ft2÷280cfm=181380$/yr÷18diffusers=76.7$/
diffusers
GymEx :ComplexeThibault
(40’x100’)(20persons)
4000ft2
20cfm/pers
=400cfm
0.064000x0.06=240cfm
640cfm÷ 0.8=
800cfm O/A
640cfm÷ 1.1=
582cfm O/A
218cfm x*6$=Savings of1308$/yr
DAL358DN600=400cfm
219$÷ 131$=
1.8years
Energy savings through DAL358 and DAL 359