Numerical investigation of heat transfer in a garment convective cooling system
Source abstract
Abstract
Abstract A personal microclimate management system is designed to maintain thermal comfort which allows people to overcome a harsh environment. It consists of several micro-fans placed in the garment side seam to provide cooling air. The computational fluid dynamics method was used to simulate the three-dimensional model and analysis the influence of fan’s number and air gap distance. The obtained results depict that the introduced cool airflow will find its way along paths with flow resistance minimized and exhaust through several separated exit. The body heat flux is taken away at the same time. The convection effect is enhanced by the increase in the fans’ numbers, but the fans’ cooling effect varies a lot because of various air gap distances. When the air gap is small enough, the cooling air impact the body surface directly and causes fierce heat loss. While the air gap distance is large enough, the heat transfer along the skin surface could be enhanced by the eddy flow which is existed in the air gap between body and garment. These phenomena can maintain the body’s thermal comfort in a suitable range.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Thermoregulation and physiological responses · Infection Control and Ventilation · Aerodynamics and Fluid Dynamics Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Barwood, M. J., Newton, P. S., & Tipton, M. J. (2009). Ventilated vest and tolerance for intermittent exercise in hot, dry conditions with military clothing. Aviation Space & Environmental Medicine, 80(4), 353–359. https://doi.org/10.3357/ASEM.2411.2009.10.3357/ASEM.2411.2009 ↗
2. Cho, M. K., Jung, H., Lee, H. W., & Lee, J. W. (2016). Simple formula for the non-uniform contaminant deposition on a cylindrical human body surrounded by porous clothing. Journal of Mechanical Science and Technology, 30(4), 1595–1601. https://doi.org/10.1007/s12206-016-0314-3.10.1007/s12206-016-0314-3 ↗
3. Choudhary, B., Wang, U. F., et al. (2019). Development and experimental validation of a 3d numerical model based on CFD of the human torso wearing air ventilation clothing. International Journal of Heat and Mass Transfer, 147(2), 1–11. https://doi.org/10.1016/j.ijheatmasstransfer.2019.118973.10.1016/j.ijheatmasstransfer.2019.118973 ↗
4. Delkumburewatte, G. B., & Dias, T. (2012). Wearable cooling system to manage heat in protective clothing. The Journal of the Textile Institute, 103(5), 483–489. https://doi.org/10.1080/00405000.2011.587647.10.1080/00405000.2011.587647 ↗
5. Ernst, T. C., & Garmella, S. (2013). Demonstration of a wearable cooling system for elevated ambient temperature duty personnel. Applied Thermal Engineering, 60(2), 316–324. https://doi.org/10.1016/j.applthermaleng.2013.06.019.10.1016/j.applthermaleng.2013.06.019 ↗
6. Gao, S., Ookab, R., & Oh, W. (2019). Formulation of human body heat transfer coefficient under various ambient temperature, air speed and direction based on experiments and CFD. Building and Environment, 160(8), 1–17. https://doi.org/10.1016/j.buildenv.2019.10616810.1016/j.buildenv.2019.106168 ↗
7. Hadid, A., Yanovich, R., Erlich, T., et al. (2008). Effect of a personal ambient ventilation system on physiological strain during heat stress wearing a ballistic vest. European Journal of Applied Physiology, 104, 311–319. https://doi.org/10.1007/s00421-008-0716-8.10.1007/s00421-008-0716-8 ↗
8. Ismail, N., Ghaddar, N., & Ghali, K. (2019). A clothing ventilation and heat loss electric circuit model with natural convection for a clothed swinging arm of a walking human. Heat Transfer Engineering, 2, 330–345. https://doi.org/10.1080/01457632.2018.1429055.10.1080/01457632.2018.1429055 ↗
9. Jia, J. H., Fu, D. B., He, Z. P., et al. (2020). Hypersonic aerodynamic interference investigation for a two-stage-to-orbit model. Acta Astronautica, 168, 138–145. https://doi.org/10.1016/j.actaastro.2019.11.038.10.1016/j.actaastro.2019.11.038 ↗
10. Karim, N., Afroj, S., Lloyd, K., et al. (2020). Sustainable personal protective clothing for healthcare applications: A review. ACS Nano, 168(10), 12313–12340. https://doi.org/10.1021/acsnano.0c05537.10.1021/acsnano.0c05537 ↗
11. Kim, S. M., & Park, C. K. (2007). Basic garment type generation using geometric modeling method. International Journal of Clothing Science and Technology, 19(1), 7–17. https://doi.org/10.1108/09556220710717017.10.1108/09556220710717017 ↗
12. Li, J., Zhang, Z., & Wang, Y. (2013). The relationship between air gap sizes and clothing heat transfer performance. The Journal of the Textile Institute, 104(12), 1327–1336. https://doi.org/10.1080/00405000.2013.802080.10.1080/00405000.2013.802080 ↗
13. Mert, E., Psikuta, A., Bueno, M. A., et al. (2015). Effect of heterogenous and homogenous air gaps on dry heat loss through the garment. International Journal of Biometeorology, 59(11), 1701–1710. https://doi.org/10.1007/s00484-015-0978-x.10.1007/s00484-015-0978-x ↗
14. Oh, W., & Kato, S. (2018). The effect of airspeed and wind direction on human’s thermal conditions and air distribution around the body. Building and Environment, 141, 103–116. https://doi.org/10.1016/j.buildenv.2018.05.052.10.1016/j.buildenv.2018.05.052 ↗
15. Renato, M. C., Kleber, M. L., & Marcos, F. C. (2019). A review of hybrid integral transform solutions in fluid flow problems with heat or mass transfer and under Navier-Stokes equations formulation. Numerical Heat Transfer Fundamentals, 4, 1–28. https://doi.org/10.1080/10407790.2019.1642715.10.1080/10407790.2019.1642715 ↗
16. Salaun, F., Devaux, E., Bourbigot, S., & Rumeau, P. (2010). Development of phase change materials in clothing part I: Formulation of microencapsulated phase change. Textile Research Journal, 80(3), 195–205. https://doi.org/10.1177/0040517509093436.10.1177/0040517509093436 ↗
17. Sun, Y., & Jasper, W. J. (2015). Numerical modeling of heat and moisture transfer in a wearable convective cooling system for human comfort. Building and Environment, 93(2), 50–62. https://doi.org/10.1016/j.buildenv.2015.06.008.10.1016/j.buildenv.2015.06.008 ↗
18. Tang, Y., He, Y., Shao, H., & Ji, C. (2016). Assessment of comfortable clothing thermal resistance using a multi-scale human thermoregulatory model. International Journal of Heat & Mass Transfer, 98(7), 568–583. https://doi.org/10.1016/j.ijheatmasstransfer.2016.03.030.10.1016/j.ijheatmasstransfer.2016.03.030 ↗
19. Xu, X., & Gonzalez, J. (2011). Determination of the cooling capacity for body ventilation system. European Journal of Applied Physiology, 111(21), 3155–5160. https://doi.org/10.1007/s00421-011-1941-0.10.1007/s00421-011-1941-0 ↗
20. Yang, R. H., Liu, C., Xue, Y., et al. (2016). Numerical analysis and comparison of airflow in rotors with U and V groove during rotor spinning process. Journal of Engineered Fibers & Fabrics, 11(4), 29–35. https://doi.org/10.1177/155892501601100405.10.1177/155892501601100405 ↗
21. Yazdi, M. M., & Sheikhzadeh, M. (2014). Personal cooling garments: A review. The Journal of the Textile Institute, 105(12), 1231–1250. https://doi.org/10.1080/00405000.2014.895088.10.1080/00405000.2014.895088 ↗
22. Zhang, D. L., Wang, J., & Yang, Y. P. (2014) Design 3D garments for scanned human bodies. Journal of Mechanical Science & Technology, 28(7), 2479–2487. https://doi.org/10.1007/s12206-014-0605-5.10.1007/s12206-014-0605-5 ↗
23. Zhang, D., Liu, Y., Wang, J., et al. (2018). An integrated method of 3D garment design. The Journal of the Textile Institute, 109(12), 1595–1605. https://doi.org/10.1080/00405000.2018.1436638.10.1080/00405000.2018.1436638 ↗
24. Zhang, Y. J., & Jia, J. H. (2021). Numerical investigation of heat transfer in garment air gap. AUTEX Research Journal, 21, 1–8. https://doi.org/10.2478/aut-2020-005510.2478/aut-2020-0055 ↗
25. Zhao, M., Gao, C., Wang, F., et al. (2013). A study on local cooling of garments with ventilation fans and openings placed at different torso sites. International Journal of Industrial Ergonomics, 43, 232–237. https://doi.org/10.1016/j.ergon.2013.01.001.10.1016/j.ergon.2013.01.001 ↗