Nobel peace price
SFP
% ERV/HRV
kWh/m2/year
Tightness
Qmin
Why ventilation?
• Health • Productivity • Comfort • Energy used • Energy recovered
The V채rmlands Study
Health
Risk
2,5 2,0 1,5 1,0 0,5 0,0 0,8
0,6
0,4
0,2
0
Volume change / hour
Good ventilation gives healthier children
The Bamse Study
• • •
Health
4000 children followed, born -94 and -96 Why do children become allergic? 40% of 4-year olds have some form of allergy
Risk factors: • Poor indoor climate • Smoking • Short period of breast feeding More than one risk factor gives large increase
Sources of Contamination Indoors
• People • Machines • Material
Health
Why ventilation?
• Health • Productivity • Comfort • Energy used • Energy recovered
Technical University of Denmark Behind screen
Productivity
Exposure area
Characters typed per min
Productivity
Productivity
Text typing
155 153 151 149 147
(R2=0.99, P<0.03)
145 0
5
10
15
20
25
30
Outdoor air rate (L/s/person)
Efficiency - Temperature
Productivity
Efficiency % 100 90 80 70 60 50 40 10
15
20
25
30
Room temp 째C
Influencing Factors
• Air pollution • Temperature • Humidity • Air velocity • Acoustic
Productivity
Why ventilation?
• Health • Productivity • Comfort • Energy used • Energy recovered
The Purpose of Ventilation Health
Productivity
â&#x20AC;˘ Transport away â&#x20AC;˘
contaminated air and replace it with clean air Create the appropriate temperature
Comfort
Goal: Improved indoor environment Health Productivity Comfort
40
Hamburg
Hamburg
30
20
10
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7000
8000
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Hamburg
Hamburg
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7000
8000
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Hamburg
Hamburg
30
20
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1000
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7000
8000
40
Hamburg
Hamburg
30
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1000
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7000
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40
Hamburg
Hamburg
30
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40
Stockholm
30
Hamburg
20
10
0
-10
-20 0
1000
2000
3000
4000
5000
6000
7000
8000
Hamburg
ERV/HRV
Energy recovered
EC technology
Energy used
EC-fan
EC technology •
Roof fans DVC-S and DVC-P
•
Multibox MUB-EC
•
AHU
Energy used
Pressure drop
P 1 m3/s 50%
Energy used
V * ptot
tot
17,5 kWh/Pa/year
Industry prices
Domestic prices
Price of electricity
Energy used
Pressure drop
P
V * ptot
tot
1 m3/s 50%
17,5 kWh/Pa/year 0,143 €/kWh
2,5 €/Pa
Energy used
Pressure drop
Energy used
Duct system 200 Pa Heat battery 50 Pa
500 €
125 €
Filter 70 – 250 Pa
175-625 €
Exchanger 100 Pa
250 €
Chassis 50 Pa
125 €
Efficiency - working point max 40% max 20%
P
15% 150
q
Energy used
Future:
Opportunity:
ď&#x201A;§ Think and improve energy efficiency in our business ď&#x201A;§ Systemair has the efficient products today
Thanks!
Frederic Cousquer Mats Sรกndor