07_

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

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Hamburg

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Stockholm

30

Hamburg

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2000

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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