Numerical Investigation of Indoor CO 2 Concentration Distribution in an Apartment

Abstract

In a residential kitchen, a number of pollutants are generated due to cooking and are released into the ambient air; these can significantly affect the indoor air quality of residential environment. The purpose of this study was to investigate the indoor environmental conditions via the velocity field, temperature field and CO₂ concentration distribution during cooking in a kitchen in a typical Korean apartment. Numerical simulations were conducted using the computational fluid dynamics software FLUENT 6.3 for solving the continuity, momentum, energy and concentration equations in an unsteady state with the standard k—ε turbulence model. The parameters used for the simulations included: (1) the extraction flow rate of the range hood (0, 500, 750 and 1000 m³·h^-1) and (2) the angle between the inlet airflow and the ceiling (90°, 45° and 22.5°). The findings illustrated that the temperature and CO₂ concentration distribution could be greatly influenced by the extraction flow rate of the range hood. Also, by reducing the angle between the airflow and ceiling, the area-averaged temperature could be reduced in the breathing plane of the kitchen. The findings of this research could contribute to the reduction of energy consumption and the adverse effects caused by cooking.

Keywords

CO2 concentration Temperature Apartment CFD Numerical model Cooking

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References

Yu CWF , Kim JT : Building pathology, investigation of sick buildings - VOC emissions : Indoor Built Environ 2010;19(1):30-39.

Yik FWH , Lun YF : Energy saving by utilising natural ventilation in public housing in Hong Kong : Indoor Built Environ 2010;19(1):73-87.

Baek SO , Kim YS , Perry R. : Indoor air quality in homes, offices and restaurants in Korean urban areas - indoor/outdoor relationships: Atmos Environ 1997;31(4):529-544.

Yang W. , Sohn J. , Kim J. , Son B. , Park J. : Indoor air quality investigation according to age of the school buildings in Korea: J Environ Manage 2009;90(1):348-354.

Jo WJ , Sohn JY : The effect of environmental and structural factors on indoor air quality of apartments in Korea: Building Environ 2009 ;44(9):1794-1802.

Hui PS , Wong WT , Mui KW : An epistemic indoor air quality assessment protocol for air-conditioned office : Indoor Built Environ 2007;16(2):139-147.

Hui PS , Wong LT , Mui PS : Using carbon dioxide concentration to assess indoor air quality in offices : Indoor Built Environ 2008;17(3): 213-219.

Alsmo T. , Holmberg S. : Sick buildings or not: indoor air quality and health problems in schools: Indoor Built Environ 2007;16(6): 548-555.

Willers S. , Andersson S. , Andersson R. , Grantén J. , Sverdrup C. , Rosell L. : Sick building syndrome symptoms among the staff in schools and kindergartens: are the levels of volatile organic compounds and carbon dioxide responsible : Indoor Built Environ 1996;5(4):232-235.

10.

Samet JM , Marbury MC , Spengler JD : Health effects and sources of indoor air pollution: Part I. Am Rev Respir Dis 1987;136:1486-1508.

11.

To WM , Lau YK , Yeung LL : Emission of carcinogenic components from commercial kitchens in Hong Kong : Indoor Built Environ 2007;16(1):29-38.

12.

To WM , Yeung LL , Chao YH : Characterisation of gas phase organic emissions from hot cooking oil in commercial kitchens: Indoor Built Environ 2000;9(3-4):228-232.

13.

Cui M. , Chen Z. , Zhao Z. : Benzo[a]pyrene in kitchen air and urinary 1-hydroxypyrene: Indoor Built Environ 1995;4(5):306-310.

14.

Svedahl S. , Svendsen K. , Qvenild T. , Sjaastad AK , Hilt B. : Short term exposure to cooking fumes and pulmonary function: J Occup Med Toxicol 2009;4:9.

15.

Yeung LL , To WM : Size distributions of the aerosols emitted from commercial cooking processes : Indoor Built Environ 2008;17(3): 220-229.

16.

Roe FJC : Priority for research in the field of indoor air pollution: Indoor Built Environ 1994;3(4):191-199.

17.

Wallace L. : Indoor particles: a review: J Air Waste Manage Assoc 1996;46(2):98-126.

18.

Ko YC , Lee CH , Chen MJ , Huang CC , Chang WY , Lin HJ , et al.: Risk factors for primary lung cancer among non-smoking women in Taiwan: Int J Epidemiol 1997;26(1):24-31.

19.

Ng TP , Hui KP , Tan WC : Respiratory symptoms and lung function effects of domestic exposure to tobacco smoke and cooking by gas in non-smoking women in Singapore: J Epidemiol Commun Health 1993;47(6): 454-458.

20.

Lau J. , Niu JL : Measurement and CFD simulation of the temperature stratification in an atrium using a floor level air supply method: Indoor Built Environ 2003;12:265- 280.

21.

Kim CN , Choi WH , Choung SJ , Park C-H. , Kim DS : Efficient ventilation of VOC spread in a small-scale painting process : Build Environ 2002;37(12):1321-1328.

22.

Zhai ZJ , Chen QY : Performance of coupled building energy and CFD simulations: Energy Build 2005;37:333-344.

23.

Fletcher CAJ , Mayer IF , Eghlimi A. : CFD as a building services engineering tool : Int J Archit Sci 2001;2:67-82.

24.

Chiang CM , Lai CM , Chou P-C. , Li Y-Y. : The influence of an architectural design alternative (transoms) on indoor air environment in conventional kitchens in Taiwan: Build Environ 2000;35(7):579-585.

25.

Lai ACK , Ho YW : Spatial concentration variation of cooking-emitted particles in a residential kitchen: Build Environ 2008; 43(5):871-876.

26.

Lim K. , Lee C. : A numerical study on the characteristics of flow field, temperature and concentration distribution according to changing the shape of separation plate of kitchen hood system: Energy Build 2008; 40(2):175-184.

27.

Calogine D. , Boyer H. , Ndoumbe S. , Rivière C. , Miranville F. : Identification of parameters on building concentration dispersion model: Indoor Built Environ 2010;19(2):250-266.

28.

Laybder BE , Spakdubg DB : The numerical computation of turbulence flows: Comput Methods Mech Eng 1974;3(2):269-289.

29.

American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) : Standard 62-1999: Ventilation for Acceptable Indoor Air Quality. Atlanta : ASHRAE, 1999.