Model of thermal comfort in the hyperbaric facility

• Autorzy: Majchrzycka Anna
• Języki publikacji: EN

Abstrakty

EN

The paper discusses the mathematical model of thermal comfort in the hyperbaric facility. Based on human thermal balance and thermal comfort conditions the comfort equation for the hyperbaric environment was derived. The comfort equation enables to calculate all those combinations of the diver’s activity, clothing (thermal insulation, moisture permeation factor) and environmental variables (temperature, pressure, composition, relative humidity and velocity of the breathing gas and mean radiant temperature), which would create thermal comfort in the hyperbaric environment. The paper presents also the solution of thermal comfort equation for dives up to the depth of g = 590 m, with helium-oxygen and hydrogen-oxygen breathing mixture, as well as the comfort diagrams.

Słowa kluczowe

EN

comfort temperature; human balance; hyperbaric environment

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2011
• Tom: nr 1
• Strony: 37--44
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Majchrzycka Anna

• Faculty of Mechanical Engineering and Mechatronics, Department of Heat Engineering, West Pomeranian University of Technology Al. Piastów 19 71-310 Szczecin, POLAND,

Bibliografia

• 1. Azer N.Z, S.Hsu: The use of modelling human response in the analysis of thermal comfort of indoor environments. Proceedings of a Symposium Held at the National Bureau of Standards Gaithersburg, Maryland, February1977.
• 2. Fanger P.O.: Thermal comfort. Danish Technical Press, Copenhagen, 1970.
• 3. lynn E. T., Vorosmarti J. Jr, Modell H. I.: Research Report 21- 73, Navy Experimental Diving Unit, Washington, 1974.
• 4. Gardette B., Gortan C.,Delauze H.G.: Helium in-hydrogen out. A new diving technique. Proceedings of the 23rd Annual Scientific Meeting of the European Underwater and Baromedical Society, Bled (Slovenia), 1997.
• 5. Hamilton R.W. Jr.: Breathing mixtures. Technical Memorandum CRL-T-750, Ocean Systems and Development Laboratory, Tarrytown, New York, December 1973.
• 6. Kozak T, Majchrzycka A.: The influence of pressure, temperature and kind of gas on the coefficient of water evaporation from the free surface. Boiling and Condensation International Proceedings, Riga, 1998.
• 7. Kozak T., Majchrzycka A.: The influence of pressure and temperature on rate of water evaporation from the free surface. Advances in Engineering Heat Transfer. Proc.of Second Baltic Heat Transfer Conference, Ed. B.Sunden, E. Blums, A. Żukauskas, Computational Mechanics Publications, Southampton, Boston, 1995.
• 8. Majchrzycka A: The comfort temperature in the hyperbaric environment (in Polish). Doctoral thesis, Technical University of Szczecin, Szczecin, 1982.
• 9. Moor T. O., Morlock J. F., Lally D. A., Hong S. K.: Thermal cost of saturation diving: respiratory and whole body heat loss at 16.1 ATA. Proc. of the Third Symposium on Underwater Physiology, Freeport, Bahamas, 1972.
• 10. Nishi Y., Gagge A.P.: Moisture Permeation of Clothing – A Factor governing Thermal Equilibrium and Comfort. ASHRAE Transactions, vol.76,1,1970.
• 11. Raymond L.: Temperature problems in multiday exposures to high pressures in the sea. Thermal balance in hyperbaric atmospheres. Proc. of the Third Symposium on Underwater Physiology, Baltimore, 1966.
• 12. Raymond L.W., Bell W.H. 2nd, Bondi K.R., Lindberg C.R.: Body temperature and metabolism in hyperbaric helium atmospheres. J. Appl. Physiol.,1968, May 24(5).
• 13. Raymond LW, Thalmann E, Lindgren G, Langworthy HC, Spaur WH, Crothers J, Braithwaite,W, Berghage T.: Thermal homeostasis of resting man in helium-oxygen at 1-50 atmospheres absolute, in: Undersea Biomed. Res., 1975, March 2(1).
• 14. Taylor L.: Diving with gas mixes other than air. Mixed gas diving, ed. Watersport, http://www-personal.umich.edu/~lpt/ mixhistory.htm.
• 15. Shilling C. W., Werts M. F., Schandelmeier N. R., Ed.: The underwater handbook: A guide to physiology and performance for the engineer. Plenum Press, New York, 1976.
• 16. Timbal J.,Varene P., Vieillefond H., Guenard H., L’Huiller J.: Metabolism and heat losses of resting man in hyperbaric helium atmosphere. Journal of Applied Physiology, 36, 4, 1974.
• 17. Varene P., Timbal J., Viellefond H., Guenard H., L’Huiller J.: Energy balance of man in simulated dive from 1.5 to 31 ATA. Proc. of the Third Symposium on Underwater Physiology, Freeport, Bahamas, 1972.
• 18. Webb P., Troutman S.J.Jr., Fratalli V., Dwyer J., Moore T.O.,Morlock J.F,Smith R.M., Ohta Y.: Energy balance in saturation diving. Report ADA041834 Naval Medicine Research and Development Command, Bethesdea, Maryland, 1976.
• 19. Webb P.: Body heat loss in undersea gaseous environments. Aerospace Medicine, 10, 1970.
• 20. Webb P.: The thermal drain of comfortable hyperbaric environments. Naval Research Review, 3, 1973.