Indoor Air QualityIndoor Air Quality

Lee Jung-Hyun

2200937

Department of Civil and Environmental System Engineering

University of Incheon, South Korea

ContentsContents IntroductionIntroduction Importance of indoor air qualityImportance of indoor air quality Study purposeStudy purpose

Main subjectMain subject

Indoor air pollutant and pollution Indoor air pollutant and pollution source source

Effect of Indoor air pollutant Effect of Indoor air pollutant Factors Influencing indoor air quality Factors Influencing indoor air quality

ConclusionConclusion For improving indoor air qualityFor improving indoor air quality

Study purposeStudy purpose Introduction to Indoor AIndoor Air ir

pollutant pollutant and pollution sourceand pollution source

Application box model

-Relation among factors

-How to improve air quality

How influence indoor air pollution to human?

Definition Definition

The condition of the air inside The condition of the air inside buildings, including the extent of buildings, including the extent of pollution caused by smoking, pollution caused by smoking, dust, mites, mold spores, radon, dust, mites, mold spores, radon, and gases and chemicals from and gases and chemicals from materials and appliances.materials and appliances.

What is indoor air quality?What is indoor air quality?

Indoor pollutionIndoor pollution

pollutantpollutant SourceSource

Combustion gases-CO,NOCombustion gases-CO,NO Combustion-furnace, cooking stove, Combustion-furnace, cooking stove, space heater, etc.space heater, etc.

Volatile organic compounds(VOCs)Volatile organic compounds(VOCs) Outgassing of building materials, coatings, wall and Outgassing of building materials, coatings, wall and floor coverings, and furnishingsfloor coverings, and furnishings

FomaldehydeFomaldehyde Outgassing of pressed wood, insulation foamOutgassing of pressed wood, insulation foam

ozeonozeon Duplicator, Air cleaner Duplicator, Air cleaner

Biological agents-molds, Biological agents-molds, spores, dangerspores, danger

Contaminated ventilation systems, petsContaminated ventilation systems, pets

Environmental tobacco Environmental tobacco smokesmoke

Smoking in buildingSmoking in building

RadonRadon Infiltration from soil beneath structureInfiltration from soil beneath structure

Particulate matterParticulate matter CombustionCombustion

AsbestosAsbestos Construction coatings, tile, insulationConstruction coatings, tile, insulation

Indoor Air Pollutants and Typical Indoor Air Pollutants and Typical sourcessources

Importance of indoor air Importance of indoor air qualityquality

Cognizance about Importance of indoor air quality .

Dilution rates of atmospheric pollution

Dilution rates of indoor air pollution

We spend about 90% of our time indoors in our homes, cars, offices, factories, public buildings such as restaurants, malls, and others.

Without proper ventilation, increase concentration

Negative influence on human

PollutantPollutant EffectEffect

Combustion gases-Combustion gases-CO,NOCO,NO

Headache, vertigo, emesis, lung Headache, vertigo, emesis, lung disease disease

Volatile organic compounds(VVolatile organic compounds(VOCs)OCs)

the production of cancerthe production of cancer

FomaldehydeFomaldehyde skin stimulus ,lung cancerskin stimulus ,lung cancer

ozeonozeon stimulus on the respiratory organs , stimulus on the respiratory organs , exhaustion exhaustion

Biological agents-Biological agents-molds, spores, dangermolds, spores, danger

allergic disease, respiratory diseaseallergic disease, respiratory disease

Environmental tobacco Environmental tobacco smokesmoke

Anxiousness, lung disease, lung Anxiousness, lung disease, lung cancercancer

RadonRadon lung cancerlung cancer

Particulate matterParticulate matter stimulus on the respiratory organs stimulus on the respiratory organs and mucous membrane, the and mucous membrane, the

production of cancerproduction of cancer

AsbestosAsbestos skin stimulus ,lung cancerskin stimulus ,lung cancer

Effect of Indoor air Effect of Indoor air pollutantpollutant

(A), exchange (B), indoor concentration

(C), outgassing of building and furniture materials

(D), infiltration from soils (E), removal on interior surfaces

Factors on Influencing indoor air qualityFactors on Influencing indoor air quality(application box model)(application box model)

What is box model?What is box model?

)1)(/(* //1

tqtq eQSCeCCi

S

Q1

C1

Q2

C2

Optional Value Substitution !

IN - OUT + SOURCE

= ACCMULATION

3/1

3100

sec/100

3/100

3/5

mugS

mV

mQ

mugC

mugiC

0 100 2004

6

8

10

12

f t( )

t

Suppose : f(t)=C

V

C

0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.924

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

0 100 2005

5.05

5.1

5.1

5.01

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

V V/2

Q Q/2

C C/2

0 100 2005

5.05

5.1

5.1

5.005

f t( )

2001 t

ResultResult

(V) is not related to (C) , but inverse proportion with Diffusion Velocity

Q ∝ C

C ∝ C

How to improve Indoor Air QualityHow to improve Indoor Air Quality

IncreaseIncrease amount of ventilation(Q) amount of ventilation(Q)

Decrease Decrease pollutionpollution Concentration Concentration

ConclusionConclusion

Thank you for Thank you for attending attending presentationpresentation ……

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