Ventilation Flow Organization for Efficient Elimination of Contaminated Air

• Autorzy: Holmberg S.
• Języki publikacji: EN

Abstrakty

EN

Displacement ventilation and well-organized ventilation flow structures are emphasized. Perhaps the biggest advantage of displacement ventilation is its increased effectiveness in removing pollutants from a ventilated space and the efficient use of ventilation air. Several questions on how the systems should be designed to achieve optimal efficiency are still unanswered. Small variations in room geometries and air supply arrangements can totally change the conditions. Results from this investigation show the importance of an even distribution of the incoming supply air, numerically calculated age-of-air values and the influence of residual tracer concentrations on rneasured mean values for the age of air.

Słowa kluczowe

EN

ventilation principles; age of air; air change efficiency; air distribution; contaminant control

PL

wentylacja; powietrze; kontrola zanieczyszczeń

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 1998
• Tom: Vol. 4, No. 1
• Strony: 85--96
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Holmberg S.

• National Institute for Working Life, Sweden

Bibliografia

• [1] Davidson, L., & Olsson, E. (1987). Calculation of age and local purging flow rate in rooms. Building and Environment, 22(2), 111-127.
• [2] Holmberg, S. (1992). Mean age of room air < t > for ideal and non-ideal flow patterns. In Proceedings of the International Symposium on Room Air Convection and Ventilation Effectiveness (pp. 173-176). Tokyo. Republished by American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE; Publication No 90363 1993), Atlanta, GA: ASHRAE, 173-176.
• [3] Holmberg, S., Paprocki, A., & Tang, Y-Q. (1994). Diffusers for horizontal air flow. In Proceedings, Roomvent ’94, Air Distribution in Rooms, 4th International Conference in Kraków, Poland (Vol. 2, pp. 230-241). Gliwice, Poland: Department of Heating Ventilation and Dust Removal Technology, Silesian Technical University.
• [4] Holmberg, S., & Tang, Y-Q. (1992). Radial spread of supply air and horizontal displacement ventilation. In Proceedings, Roomvent ’92, Air Distribution in Rooms, 3rd International Conference in Aalborg, Denmark (Vol. 3, pp. 89-99). Lyngby, Denmark: Danish Association of Heating, Ventilation and Air-Conditioning Engineers (DANVAC).
• [5] Jones, W.P., & Launder, B.E. (1972). The prediction of laminarization with a two-equation model of turbulence. International Journal of Heat and Mass Transfer, 15, 301-314.
• [6] Kulmala, I. (1995). Numerical simulation of the capture efficiency of an unflanged rectangular exhaust opening in a coaxial air flow. Annals of Occupational Hygiene, 39(1), 21-31.
• [7] Levenspiel, O. (1962). Chemical Reaction Engineering. New York: Wiley.
• [8] Mierzwinski, S., Nawrocki, W., & Trzeciakiewicz, Z. (1994). Air exchange efficiency under displacement ventilation conditions. In Proceedings, Roomvent ’94, Air Distribution in Rooms, 4th International Conference in Kraków, Poland (Vol. 2, pp. 103-112). Gliwice, Poland: Department of Heating Ventilation and Dust Removal Technology, Silesian Technical University.
• [9] Sandberg, M. (1987). What is ventilation efficiency? Building and Environment, 16(2), 123-135.
• [10] Sandberg, M. (1992). Ventilation effectiveness and purging flow rate-A review. In Proceedings of the International Symposium on Room Air Convection and Ventilation Effectiveness (pp. 1-21). Tokyo.
• [11] Sandberg, M., & Sjöberg, M. (1983). The use of moments for assessing air quality in ventilated rooms. Building and Environment, 18(A), 181-197.
• [12] Tang, Y-Q., & Holmberg, S. (1992). An experimental investigation of a horizontal displacement ventilation system (Undersökningsrapport [Investigation report] 1992:2). Solna, Sweden: National Institute of Occupational Health.