Protection to thermal impact of solar radiation: evaluation of selected reflective fabrics

Lennart Teunissen; Linda Plaude; Kaspar Jansen

doi:10.25367/cdatp.2021.2.p103-114

Authors

Lennart Teunissen Delft University of Technology, Delft, The Netherlands https://orcid.org/0000-0002-4898-8850
Linda Plaude Delft University of Technology, Delft, The Netherlands
Kaspar Jansen Delft University of Technology, Delft, The Netherlands https://orcid.org/0000-0002-2172-9824

DOI:

https://doi.org/10.25367/cdatp.2021.2.p103-114

Keywords:

solar radiation, thermal impact, reflective fabric, heat stress

Abstract

Prolonged exposure to solar radiation can cause considerable heat stress. The application of reflective materials in garments or sunscreens is generally considered as an appropriate protective strategy. In this study, we aimed to compare a range of reflective and control fabrics on their ability to reduce the thermal impact of solar radiation. We evaluated 16 reflective and 5 control fabrics, varying in applicability for garments and/or sunscreens. Transmission of ultraviolet, visible light and infrared radiation was studied using artificial solar light. Thermal impact reduction was first studied using artificial infrared light and secondly using natural sunlight, measuring temperature right at the back and 10 cm behind the fabric after a 10-minute exposure. Most samples showed comparably low radiation transmission (<10%). However, substantially higher transmission was observed in perforated and mesh-like reflective fabrics, as well as light-colored controls and coldblack® treated fabric. This resulted in larger temperature increases at 10 cm behind the fabric (+1-4°C in sunlight). Contact temperature at the back of the black fabrics ended up higher than at the back of the reflective and white control fabrics (T: 5-10°C in sunlight), the latter two showing minor mutual differences (T<3°C). In conclusion, the reflective fabrics (excluding perforated, mesh and coldblack®) showed minor mutual differences, lower heat absorption than the black control fabrics and lower heat transmission than the white ones. The results suggest that reflective or white fabrics are preferable for most garment applications, while reflective or possibly black fabrics are preferable for sunscreen applications.

References

Galloway, S. D. R. and Maughan, R. J. 1997. Effects of ambient temperature on the capacity to perform prolonged cycle exercise in man. Medicine and science in sports and exercise, 29 (1997), 1240-1249.

Gonzalez-Alonso, J., Teller, C., Andersen, S. L., Jensen, F. B., Hyldig, T. and Nielsen, B. Influence of body temperature on the development of fatigue during prolonged exercise in the heat. J Appl Physiol, 86, 3 (Mar 1999), 1032-1039.

Maughan, R. J., Otani, H. and Watson, P. Influence of relative humidity on prolonged exercise capacity in a warm environment. European journal of applied physiology, 112, 6 (Jun 2012), 2313-2321.

Petruzzello, S. J., Gapin, J. I., Snook, E. and Smith, D. L. Perceptual and physiological heat strain: examination in firefighters in laboratory- and field-based studies. Ergonomics, 52, 6 (Jun 2009), 747-754.

Flouris, A. D., Dinas, P. C., Ioannou, L. G., Nybo, L., Havenith, G., Kenny, G. P. and Kjellstrom, T. Workers' health and productivity under occupational heat strain: a systematic review and meta-analysis. Lancet Planet Health, 2, 12 (Dec 2018), e521-e531.

Lucas, R. A., Epstein, Y. and Kjellstrom, T. Excessive occupational heat exposure: a significant ergonomic challenge and health risk for current and future workers. Extrem Physiol Med, 3 (2014), 14.

Nielsen, B., Hyldig, T., Bidstrup, F., Gonzalez-Alonso, J. and Christoffersen, G. R. Brain activity and fatigue during prolonged exercise in the heat. Pflugers Arch, 442, 1 (Apr 2001), 41-48.

Lindberg, F., Holmer, B., Thorsson, S. and Rayner, D. Characteristics of the mean radiant temperature in high latitude cities--implications for sensitive climate planning applications. Int J Biometeorol, 58, 5 (Jul 2014), 613-627.

Brode, P., Kuklane, K., Candas, V., Den Hartog, E. A., Griefahn, B., Holmer, I., Meinander, H., Nocker, W., Richards, M. and Havenith, G. Heat gain from thermal radiation through protective clothing with different insulation, reflectivity and vapour permeability. International journal of occupational safety and ergonomics : JOSE, 16, 2 (2010), 231-244.

Otani, H., Kaya, M., Tamaki, A., Goto, H., Tokizawa, K. and Maughan, R. J. Combined effects of solar radiation and airflow on endurance exercise capacity in the heat. Physiol Behav (Nov 24 2020), 113264.

Otani, H., Kaya, M., Tamaki, A., Watson, P. and Maughan, R. J. Effects of solar radiation on endurance exercise capacity in a hot environment. European journal of applied physiology, 116, 4 (Apr 2016), 769-779.

Holzer, A. M., Athar, M. and Elmets, C. A. The Other End of the Rainbow: Infrared and Skin. Journal of Investigative Dermatology, 130, 6 (2010/06/01/ 2010), 1496-1499.

Kochevar, I. E., Pathak, M. A. and Parrish, J. A. 1999. Photophysics, photochemistry, and photobiology. In: Freedberg, I.M., Eisen, A.Z., Wolff, K., Austen, K.F., Goldsmith, L.A., Katz, S.I., Fitzpatrick, T.B. (eds.) Fitzpatrick's Dermatology in General Medicine (5th. ed.). McGraw-Hill, New York, NY, 220– 229.

Bundesamt für Strahlenschutz. Applications of infrared radiation (2020). Retrieved July 2021 from https://www.bfs.de/EN/topics/opt/application-medicine-wellness/infrared/infrared_node.html.

Schieke, S. M., Schroeder, P. and Krutmann, J. Cutaneous effects of infrared radiation: from clinical observations to molecular response mechanisms. Photodermatology, Photoimmunology & Photomedicine, 19, 5 (2003), 228-234.

Cornelissen, P. H. Warmtebeelden interpreteren (2011), 1-20. Retrieved Aug 2020 from http://img.warmtecheck.nl/Warmtebeelden%20interpreteren.pdf.

Steketee, J. Spectral emissivity of skin and pericardium. Physics in Medicine and Biology, 18, 5 (1973/09/01 1973), 686-694.

Davis, S., Capjack, L., Kerr, N. and Fedosejevs, R. Clothing as protection from ultraviolet radiation: which fabric is most effective? International journal of dermatology, 36, 5 (May 1997), 374-379.

Hes, L., Bal, K. and Boguslawska–Baczek, M. 2014. Why black clothes can provide better thermal comfort in hot climate than white clothes. In Proceedings of the The Fiber Society Spring Conference, May 21 - 23, 2014, Liberec, Czech Republic. DOI:10.13140/2.1.1981.5049.

Ruchtie, W. 2018. Effect of cycling shirt properties on thermal strain. Master's thesis. VU University, Amsterdam, The Netherlands.

Kuwabara, S., Joko, K. and Takahashi, K. Promotion of heat retaining of clothes by dyeing cloth with a dye absorbing infrared rays. Journal of Textile Engineering, 62, 3 (2016), 43-50.

Shimazaki, Y., Goto, S., Yoshida, A. and Yamamoto, T. The effect of solar radiation on temperature distribution in outdoor human–clothing–environment systems. International Journal of Heat and Mass Transfer, 104 (2017), 1-6.

Smith, J. and Throop, W. The effect of color on temperatures inside hardhats. Tech Tip 0651–2312–MTDC. Department of Agriculture, Forest Service, Missoula Technology and Development Center, Missoula, MT, 2006.

Wilson, C. A., Bevin, N. K. and Laing, R. M. Solar Protection – Effect of Selected Fabric and Use Characteristics on Ultraviolet Transmission. Textile Research Journal, 78, 2 (2008), 95-104.

Bogerd, C. P., Aerts, J.-M., Annaheim, S., Brode, P., de Bruyne, G., Flouris, A. D., Kuklane, K., Sotto Mayor, T. and Rossi, R. M. A review on ergonomics of headgear: Thermal effects. International Journal of Industrial Ergonomics, 45 (2015), 1-12.

Shapiro, Y., Moran, D., Epstein, Y., Stroschein, L. and Pandolf, K. B. Validation and adjustment of the mathematical prediction model for human sweat rate responses to outdoor environmental conditions. Ergonomics, 38, 5 (May 1995), 981-986.

Bogerd, C. P., Bruhwiler, P. A. and Heus, R. The effect of rowing headgear on forced convective heat loss and radiant heat gain on a thermal manikin headform. J Sports Sci, 26, 7 (May 2008), 733-741.

Mandal, J., Fu, Y., Overvig, A. C., Jia, M., Sun, K., Shi, N. N., Zhou, H., Xiao, X., Yu, N. and Yang, Y. Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling. Science, 362, 6412 (Oct 19 2018), 315-319.

Van Marken Lichtenbelt, W. D., Daanen, H. A., Wouters, L., Fronczek, R., Raymann, R. J., Severens, N. M. and Van Someren, E. J. Evaluation of wireless determination of skin temperature using iButtons. Physiol Behav, 88, 4-5 (Jul 30 2006), 489-497.

Hodder, S. G. and Parsons, K. The effects of solar radiation on thermal comfort. Int J Biometeorol, 51, 3 (Jan 2007), 233-250.

Nielsen, B., Kassow, K. and Aschengreen, F. E. Heat balance during exercise in the sun. European journal of applied physiology and occupational physiology, 58, 1-2 (1988), 189-196.

Cheuvront, S. N., Kenefick, R. W., Montain, S. J. and Sawka, M. N. Mechanisms of aerobic performance impairment with heat stress and dehydration. J Appl Physiol (1985), 109, 6 (Dec 2010), 1989-1995.

Sawka, M. N., Cheuvront, S. N. and Kenefick, R. W. High skin temperature and hypohydration impair aerobic performance. Experimental physiology, 97, 3 (Mar 2012), 327-332.

Downs, N. J., Axelsen, T., Schouten, P., Igoe, D. P., Parisi, A. V. and Vanos, J. Biologically effective solar ultraviolet exposures and the potential skin cancer risk for individual gold medalists of the 2020 Tokyo Summer Olympic Games. Temperature (Austin), 7, 1 (2020), 89-108.

Bruhwiler, P. A. Radiant heat transfer of bicycle helmets and visors. J Sports Sci, 26, 10 (Aug 2008), 1025-1031.