An Investigation of Thermal Comfort for Mold, Welding and Turning Technicians and the Effects on Performance in Naturally Ventilated Area

Yıl 2019, Cilt: 23 Sayı: 4, 559 - 568, 01.08.2019

Kemal Furkan Sökmen

https://doi.org/10.16984/saufenbilder.430811

Öz

In
this study, thermal comfort measurements were made for mold, welding, and
turning technicians in naturally ventilated industrial establishments.
Metabolic rates were determined as 100 W/m2 for welding and turning
and 190 W/m2 for mold technicians. The clothing insulation factor was
calculated as 0.68 clo. The measurements were done  in 3 different
companies on 17-19 July 2017 during working hours without stop
working. In terms of PMV findings, it was determined that the thermal
comfort conditions are not met according to the ASHRAE standard. As for
the WBGT value, it was determined that there was heat pressure on
17.07.2017 and there was no heat pressure on 18.07.2018 on all
the employees. On 19.07.2017, it was determined that there was a heat pressure
after 13:00 for mold technicians and after 17:00 for welding and turning
technicians. Calculated PMV values were compared with the survey results
and  ıt was determined that results were compatible with values. It
was made firm that people who were overweight and obese felt their
working environment warmer than normal
weight worker. The performance loss ratios which are
dependent on ambient temperature were calculated and compared with the
literature and was determined that they are compatible.

Anahtar Kelimeler

Ergonomics of thermal environment, employee performance, heat stress

Kaynakça

• [1] D. Holm و F. A. Engelbrecht, "Practical choice of thermal comfort scale and range in naturally ventilated buildings in South Africa", Journal of the South African Institution of Civil Engineering, 47,2,. 9–14, 2005.[2] K. C. Parsons, "Environmental ergonomics: A review of principles, methods and models", Applied Ergonomics,31, 6, 581–594, 2000.[3] J. Pfafferott, S. Herkel, J. Wapler, "Thermal building behaviour in summer: Long-term data evaluation using simplified models", Energy and Buildings,37,8, 844–852, 2005.[4] J. Skoog, N. Fransson, L. Jagemar, "Thermal environment in Swedish hospitals: Summer and winter measurements", Energy and Buildings, 37, 8, 872–877, 2005.[5] Ansi/Ashrae, "ANSI/ASHRAE 55:2004 Thermal Environmental Conditions for Human Occupancy", Ashrae, 2004, 30, 2004.[6] ISO 7730 International Standard, "Moderate thermal environments - Determination of the PMV and PPD indices and specification of the conditions for thermal comfort". 32, 1994.[7] P. O. Fanger, Thermal comfort : analysis and applications in environmental engineering. New York: McGraw-Hill, 1970.[8] S. H. Ho, L. Rosario, M. M. Rahman, "Thermal comfort enhancement by using a ceiling fan", Applied Thermal Engineering, 29, 8–9, 1648–1656, 2009.[9] G. M. Budd, "Wet-bulb globe temperature (WBGT)—its history and its limitations", Journal of Science and Medicine in Sport, 11, 1, 20–32, 2008.[10] B. Lemke, T. Kjellstrom, "Calculating Workplace WBGT from Meteorological Data: A Tool for Climate Change Assessment", Industrial Health, 50, 4, 267–278, 2012.[11] W. J. Fisk, A. H. Rosenfeld, "Estimates of Improved Productivity and Health from Better Indoor Environments", Indoor Air, 7, 3, 158–172, 1997.[12] T. Kjellstrom, I. Holmer, B. Lemke, "Workplace heat stress, health and productivity - an increasing challenge for low and middle-income countries during climate change", Global health action, 2, Special Issue, 2009.[13] A. A. Shikdar, N. M. Sawaqed, "Worker productivity, and occupational health and safety issues in selected industries", Computers and Industrial Engineering, 45, 4, 563–572, 2003.[14] M. Krishnamurthy, P. Ramalingam, K. Perumal, L. P. Kamalakannan, J. Chinnadurai, R. Shanmugam, K. Srinivasan, V. Venugopal, "Occupational Heat Stress Impacts on Health and Productivity in a Steel Industry in Southern India", 2017.[15] HSE, "Thermal comfort in the workplace: Guidance for employers", 1999.[16] Y. Epstein D. S. Moran, "Thermal comfort and the heat stress indices.", Industrial health, 44, 3, 388–398, 2006.[17] W. . Fox, "Human Performance in the Cold", The Journal of the Human Factors and Ergonomics, 9, 3, 203–220, 1967.[18] D. A. McIntyre, Indoor Climate. London, United Kingdom: Elsevier, 1980.[19] K. . Parsons, Human Thermal Environments. London: Taylor & Francis, 1993.[20] P. Roelofsen, "The impact of office environments on employee performance: The design of the workplace as a strategy for productivity enhancement", Journal of Facilities Management, 1, 3, 247–264, 2002.[21] J. J. Pilcher, E. Nadler, و C. Busch, "Effects of Hot and Cold Temperature Exposure on Performance: a Meta-Analytic Review", Ergonomics, 45, 10, 682–698, 2002.[22] G. A. Berglund L, Gonzales R, "Predicted human performance decrement from thermal discomfort and ET*", 1990, vol 1:215-220.[23] O. Seppänen, W. J. Fisk, D. Faulkner, "Cost Benefit Analysis of the Night-Time Ventilative Cooling in Office Building", Proceedings of the Healthy Buildings 2006 Conference, 243–247, 2006.[24] Manuel C.Gameiro, "SPREADSHEETS FOR THE CALCULATION OF THERMAL COMFORT INDICES PMV AND PPD", 2014.[25] P. O. Fanger, "Assessment of thermal comfort practice", Occupational and Environmental Medicine,30, 313–324, 1973.[26] TS EN 27243, TS EN 27243, 27243, 1993. 2002.[27] K. Parsons, "Heat stress standard ISO 7243 and its global application.", Industrial health, 44, 3, 368–379, 2006.[28] I. Atmaca, O. Kaynakli, و A. Yigit, "Effects of radiant temperature on thermal comfort", Building and Environment, 42,9, 3210–3220, 2007.[29] O. Seppanen, W. J. Fisk, Q. H. Lei, O. Seppänen, "Title Room temperature and productivity in office work Room Temperature and Productivity in Office Work Room Temperature and Productivity in Office Work", 2006.