Abstract
Firefighting is a hazardous occupation that requires the wearing of appropriate protective clothing which must be designed to be flame- and heat-resistant while also allowing for a firefighter’s ease of movement. To increase the thermal protection provided by a firefighting suit and decrease the likelihood of the firefighter receiving skin burns, we propose incorporating a layer of a phase-change material (PCM) as well as air gaps in its structure. We investigate the distribution of heat through the layers of a firefighting suit and skin to determine whether this approach will be successful when different suit configurations are exposed to a range of fire scenarios with external heat fluxes between \(5\,{\rm kWm}^{-2}\) and \(84\,{\rm kWm}^{-2}\). We use a one-dimensional model of heat transfer which we solve numerically to determine the length of time each suit configuration allows a firefighter to be exposed to heated conditions before suffering irreversible thermal skin damage. Thermal damage to the skin is known to occur when the temperature in the basal layer exceeds \(44\)°C. Our earlier research indicated that the combination of air gaps and a PCM layer reduces the likelihood of skin burns, and that the most effective position of a PCM in a suit is near the outer layer. This current work considers a number of different PCM compounds for providing additional thermal protection while ensuring that the extra weight required is feasible for a firefighting suit. We found that of the PCMs studied, \({\rm MgCl_2\cdot 6H_2O}\) with an overall thickness of 0.17 mm gave the best improvement in the time until thermal skin damage (of between \(13\%\) and \(19\%\)), depending on the fire scenario.
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References
Barr D, Gregson W, Reilly T (2010) The thermal ergonomics of firefighting reviews. Appl Ergon 41: 161–172
Haynes H, Molis J (2017) United states firefighter injuries-2016. Technical Report FFI10, National Fire Protection Association
Carter J, Rayson M, Wilkinson D, Richmond V, Blacker S (2007) Strategies to combat heat strain during and after firefighting. J Therm Biol 32:109–116
Chou C, Tochihara Y, Kim T (2008) Physiological and subjective responses to cooling devices on firefighting protective clothing. Eur J Appl Physiol 104:369–374
Selkirk G, McLellan T, Wong J (2004) Active versus passive cooling during work in warm environments while wearing firefighting protective clothing. J Occup Environ Hyg 1:521–531
Udayraj, P. Talukdar, A. Das, R. Alagirusam (2016) Heat and mass transfer through thermal protective clothing: a review. Int J Therm Sci 106(2016):32–56
Du Pont USA, Nomex® brand. http://www.dupont.com/products-and-services/personal-protective-equipment/thermal-protective/brands/nomex.html. Accessed 21 Nov 2018
Gore W, Structural firefighting GORE-TEX®. https://www.goreprotectivefabrics.com/fire/sff. Accessed 21 Nov 2018
Lu Y, Li J, Li X, Song G (2012) The effect of air gaps in moist protective clothing on protection from heat and flame. J Fire Sci 31(2):99–111
Torvi D, Dale J (1999) Influence of air gaps on bench-top test results of flame resistant fabrics. J Fire Prot Eng 10(1):1–12
McCarthy L, di Marzo M (2012) The application of phase change material in firefighter protective clothing. Fire Technol 48:841–864
Mercer G, Sidhu H (2008) Modelling heat transport in a new type of protective clothing during fire exposure, towards a sustainable Australasia. Chemeca, Newcastle, NSW
Rossi R, Bolli W (2005) Phase change materials for improvement of heat protection. Adv Eng Mater 7(5):368–373
Tan L, Date A, Houshyar S, Singh B, Ding L, Zhang B (2017) A comparative study of firefighters’ clothing using organic and inorganic phase change material. J Mech Eng SI 4(5):84–97
Fonseca A, Mayor T, Camos J (2018) Guidelines for the specification of a PCM layer in firefighting protective clothing ensembles. Appl Therm Eng 133:81–96
Lee Y, Barker R (1987) Thermal protective performance of heat-resistant fabrics in various high intensity heat exposures. Text Res J 57:123–132
Xin L, Li X, Li J (2014) A new approach to evaluate the effect of body motion on heat transfer of thermal protective clothing during flash fire exposure. Fibers Polym 15(10):2225–2231
Gao C, Kuklane K, Holmer I (2010) Cooling vests with phase change materials: the effects of temperature gradient, mass and covering area. Ergon 53(5):716–723
Hamdan H, Ghaddar N, Ouahrani D, Ghali K, Itani M (2016) PCM cooling vest for improving thermal comfort in hot environment. Int J Therm Sci 102:154–167
Mondal S (2008) Phase change material for smart textiles: an overview. Appl Therm Eng 28:1536–1550
Zalba B, Marin J, Cabeza L, Mehling H (2003) Review on thermal energy storage with phase change materials, heat transfer analysis and applications. Appl Therm Eng 23:251–283
Henriques F (1947) Studies of thermal injury; V. The predictability and the significance of thermally induced rate processes leading to irreversible epidermal injury. Arch Pathol 43:489–502
Pennes H (1948) Analysis of tissue and arterial blood temperatures in the resting human forearm. J Appl Physiol 1(2):93–122
Wieczorek C, Dembsey N (2001) Human variability correction factors for use with simplified engineering tools for predicting pain and second degree skin burns. J Fire Protect Eng 2:88–111
Torvi D (2005) Effect of the thermal properties on skin burn prediction in longer duration protective clothing tests. J ASTM Int 2(1):1–13
Stoll A, Chianta M (1969) A method and rating system for evaluation of thermal protection. Technical Report NADC-MR-6809, Aerospace Medical Research Department
Mell W, Lawson J (1999) A heat transfer model for fire fighters’ protective clothing. Technical Report 6299, National Institute of Standards and Technology
Phelps H, Sidhu H, Sidhu L (2014) Modelling heat transport in protective fire fighting clothing containing phase change materials, Chemeca 2014: Processing excellence; Powering our future
Phelps H, Sidhu H (2015) A mathematical model for heat transfer in fire fighting suits containing phase change materials. Fire Saf J 74:43–47
AS/NZS (2009) Protective clothing for fire fighters-requirements and test methods for protective clothing used for structural firefighting. New Zealand Standard 4967:2009, Australian
Barr D, Gregson W, Sutton L, Reilly T (2009) A practical cooling strategy for reducing the physiological strain associated with firefighting activity in the heat. Ergonomics 52(4):413–420
Bennett B, Hagan R, Huey K, Minson C (1995) Comparison of two cool vests on heat-strain reduction while wearing a firefighting ensemble. Eur J Appl Physiol 70:322–328
Z. Wang, Y. K. Y. Li, C. Yeung (2002) Mathematical simulation of the perception of fabric thermal and moisture sensations. Text Res J 42(4):327–334
Ghali K, Ghaddar N, Harathani J, Jones B (2004) Experimental and numerical investigation of the effect of phase change materials on clothing during periodic ventilation. Text Res J 74(3):205–214
Ying B, Kwok Y, Li Y, Zhu Q, Yeung C (2004) Assessing the performance of textiles incorporating phase change materials. Polym Test 25:580–587
Fan J, Cheng X (2005) Heat and moisture transfer with sorption and phase change through clothing assemblies. Text Res J 75(3):187–196
Mercer G, Sidhu H (2008) Mathematical modelling of the effect of fire exposure on a new type of protective clothing. ANZIAM J 49:C289–C305
Abhat A (1983) Low temperature latent heat storage thermal energy storage: heat storage materials. Solar Energy 30(4):313–332
Chitrphiromsri P, Kuznetsov A (2005) Modeling heat and moisture transport in firefighter protective clothing during flash fire exposure. Heat Mass Transf 41:206–215
Torvi D, Dale J (1994) A finite element model of skin subjected to a flash fire. J Biomech Eng 116:250–255
Stoll A, Greene L (1959) Relationship between pain and tissue damage due to thermal radiation. J Appl Physiol 14:373–382
Mensch A, Braga G, Bryner N (2011) Fire exposures of fire fighter self-contained breathing apparatus facepiece lenses. Technical Report 1724, National Institute of Standards and Technology
FlexPDE™ (2014). http://www.pdesolutions.com. Accessed 21 Nov 2018
Boleman M (2014) Plot Digitizer Version 2.0. https://www.southalabama.edu/colleges/artsandsci/physics/software.html. Accessed 21 Nov 2018
Lui J, Chen X, Xu L (1999) New thermal wave aspects on burn evaluation of skin subjected to instantaneous heating. IEEE Trans Biomed Eng 46(4):420–428
Vettori R, Twilley W, Stroup D (2001) Measurement techniques for low heat flux exposures to fire fighters protective clothing. Technical Report NISTIR 6750, National Institute of Standards and Technology
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Phelps, H.L., Watt, S.D., Sidhu, H.S. et al. Using Phase Change Materials and Air Gaps in Designing Fire Fighting Suits: A Mathematical Investigation. Fire Technol 55, 363–381 (2019). https://doi.org/10.1007/s10694-018-0794-z
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DOI: https://doi.org/10.1007/s10694-018-0794-z