Abstract
Climatic conditions in underground mines and other plants depend on climate, kind and intensity of work (metabolic rate), clothing and acclimatization. The thermal discomfort index “δ” is the parameter which evaluates these conditions. The paper presents its definition and tables including metabolic ratios and thermal insulation of miners’ clothing determined from in situ measurements. The nomograms specified for estimation of the index have also been presented in the paper. Five nomograms are included in the text concerning different values of relative humidity: 20, 40, 60, 80 and 100%. Each nomogram includes the results for a non-clothed man (thermal insulation of clothes Icl = 0) and for a fully-clothed man (Icl = 1 clo). The nomograms also consist of isolines of air velocity and metabolic rate for workers who are acclimated and for those who are not acclimated. Results for different values of relative humidity can be interpolated. The value of “δ” does not have a unit. When δ = 0, it is understood as thermal comfort; when δ ≥ 1, it is understood as a dangerous discomfort. However, when 0 < δ < 1, the value denotes acceptable discomfort conditions.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Drenda, J.: Thermal discomfort in working environments of deep mines. Zeszyty Naukowe, Politechnika Śląska, z. 213, Wydawnictwo Politechniki Śląskiej, p. 131 (in Polish) (1993)
Fanger P.O.: Thermal comfort. Analysis and Applications in Environmental Engineering. Copenhagen (1970)
Wenzel H.G., Piekarski C.: Klima und Arbeit. Bayerisches Staats-ministerium für Arbeit und Sozialordnung. 4 Aufl. München (1984)
PN-85/N-08011: (ISO 7243-1982), Hot environments-Estimation of the heat stress on working man, based on the WBGT-index (wet bulb globe temperature) (1982)
Drenda, J., Sułkowski, J., Pach, G., Różański, Z., Wrona, P.: Two stage assessment of thermal hazard in an underground minearch. Arch. Min. Sci. 61(2), 313–326 (2016)
Drenda, J.: Geometrical interpretation of the index of thermal discomfort. Zeszyty Naukowe, Politechnika Śląska, z. 227, Wydawnictwo Politechniki Śląskiej, p. 50 (in Polish) (1996)
Drenda, J.: Thermal safety of workers in warm and hot work conditions. In: Proceedings of the 5th international conference on air distribution in rooms roomvent-96, Yokohama, Japan (1996)
Drenda, J., Kułagowskam, E., Różański, Z., Pach, G., Wrona, P., Karolak, I.: Determination of the metabolic rate and work arduousness class for workers in coal mines—the results of in situ research. Arch. Mining Sci. 62(2), 313–326 (2017)
Drenda, J.: i inni: Katalog nomogramów do wyznaczenia wskaźnika dyskomfortu cieplnego, “δ” (WDC) dla osób przebywających w różnych środowiskach na powierzchni i pod ziemią bez nasłonecznienia. Wydawnictwo Politechniki Śląskiej, p. 64 (in Polish) (2017)
Drenda, J.: Evaluation of efficiency of means adopted to improve the climatic conditions in deep mines. In: Proceedings of the 7th international mine ventilation congress, Cracov, Poland, pp. 157–162 (2001)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Science Press and Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Drenda, J. (2019). Determination of Climatic Work Conditions—Thermal Discomfort Index. In: Chang, X. (eds) Proceedings of the 11th International Mine Ventilation Congress. Springer, Singapore. https://doi.org/10.1007/978-981-13-1420-9_65
Download citation
DOI: https://doi.org/10.1007/978-981-13-1420-9_65
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-1419-3
Online ISBN: 978-981-13-1420-9
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)