Authors

Rationale and calculation of thermal comfort equivalent parameters

DOI: 10.17586/1606-4313-2018-17-2-78-84
UDC 697.9/ 628.87

Rationale and calculation of thermal comfort equivalent parameters

Ryabova T.V. , Sulin A.B., Sankina J.N.

For citation: Ryabova T.V., Sulin A.B., Sankina Yu.N. Rationale and calculation of thermal comfort equivalent parameters. Vestnik Mezhdunarodnoi akademii kholoda. 2018. No 2. p. 78-84

Abstract
Modern approaches to the justification of comfortable microclimate parameters for residential and industrial premises are mainly focused on the requirements of ISO 7730 and ASHRAE Standard 55 standards. The article describes the procedure for calculating the dependences of the required air temperature as a function of humidity, mobility, and radiation temperature difference at the different levels of metabolism and clothing insulation for rooms of three comfort classes. For each comfort class the tables of iscomfortable microclimatic parameters, which are calculated for different levels of human metabolism and clothing characteristics, were preconstructed. The values obtained from the tables of the iscomfortic microclimatic parameters are substituted into the empirically obtained equation for calculating the equivalent comfort temperature. Thus, six data sets with parameters of thermal comfort for rooms of three classes are generalized by six calculated algebraic expressions. The resulting calculated expressions of an equivalent comfort temperature can be used in the design of air conditioning systems and in the programming of automatic climate control systems.

Keywords: microclimate, thermal comfort, equivalent temperature, life support systems.

All references

1. Izmerov N.F., Suvorov G.A., Kuralesin N.A ets. Physical factor. Ecological and hygienic assessment and control. A practical guide. Vol. 2. Moscow: Meditsina, 1999. 440 p. (in Russian)

2. ANSI/ASHRAE Standard 55. Thermal Environmental Conditions for Human Occupancy. 2010. P. 41.

3. Despopoulos A., Silbernagl S.Color Atlas of Physiology. 2003. P. 449.

4. Campbell I. Body Temperature and its Regulation. Anaesthesia & Intensive Care Medicine, 2008. Vol. 9, No. 6, pp. 259-263.

5. Zolfaghari A. & Maerefat M. A New Simplified Thermoregulatory Bioheat Model for Evaluating Thermal Response of the Human Body to Transient Environment. Building and Environment. 2010. Vol. 45. No. 10, pp. 2068-2076.

6. DuBois D. & DuBois E.F. A Formula to Estimate Approximate Surface Area, if Height and Weight are Known. Archives of Internal Medicine, 1916. Vol. 17, pp. 863-871.

7. Holopainen R., Tuomaala P., Hernandez P., Häkkinen T., Piira K., Piippo J. Comfort assessment in the context of sustainable buildings: Comparison of simplified and detailed human thermal sensation Methods. Building and Environment. 2014. Vol. 71. P. 60-70.

8. Halawa E, Van Hoof J. The adaptive approach to thermal comfort: a critical overview. Energy and Buildings. 2012. Vol. 51. P. 101-110.

9. Gagge A.P., Stolwijk J.A. and Nishi Y. An effective temperature scale based on a simple model of human physiological regulatory response. ASHRAE Transactions 77. Part I: 1971. P. 247-262.

10. Isaev A.A. Ecological climatology. Moscow, Nauchnyi mir, 2001, 458 p.(in Russian)

11. Aizenshtadt B.A. Method of calculation of some bioclimatic indices. Meteorologiya i gidrologiya. 1964. No 12. p. 9-16. (in Russian)

12. Golovina E.G., Trubina M.A. Methods of calculation of biometeorological parameters (indices).– SPb.: Gidrometeoizdat, 1997. 110 p.(in Russian)

13. State Standard R ISO 7730-2009. Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal criteria of comfort. Мoscow, Standartinform, 2011. 38 p. (in Russian)

14. Syed Ihtsham-ul-Haq Gilani, Muhammad Hammad Khan, Muzaffar Ali. Revisiting Fanger’s thermal comfort model using mean blood pressure as a bio-marker: An experimental investigation. Applied Thermal Engineering, Vol. 109, Part A, 25 October 2016, P. 35-43.

15. Arens E, Humphreys M.A, De Dear R., Zhang H. Are ‘class A’ temperature requirements realistic or desirable. Build Environ. 2010. Vol. 45. P. 4-10.

16. Fanger P.O. Thermal Comfort Analysis and Applications in Environmental Engineering. McGraw-Hill, New York, 1970.244 p.

17. Poddubnyi R.A., Ryabova T.V., Sulin A.B. Construction of matrices from comfortable values of microclimate parameters. Vestnik DGTU. Tekhnicheskie nauki. 2016. 41(2). p. 68-74. (in Russian)

18. Sulin A.B., Ryabova T.V., Ivanov S.V., Poddubnyi R.A. Calculation substantiation of microclimate parameters with a given level of thermal comfort. Kholodil'naya tekhnika. 2017. No 4. p. 37-41. (in Russian)

19. Madsen T., Olesen B. & Kristensen N. Comparison between operative and equivalent temperature under typical indoor conditions. ASHRAE Transactions, 1984. Vol. 90, part 1, pp.1077-1090.

Read the full article