Abstract
Engineering design of thermal quality clothing is a promising solution by applying multi-disciplinary knowledge to achieve the design and production of clothing with desirable thermal functions. In this paper, a special simulation-based and lifestyle-oriented CAD system is introduced to help the user in engineering design of thermal quality clothing. The engineering-oriented simulation models endowed with explicit data availability arose from the material parameters that are the key issue for engineering application. To offer an easy-to-use tool, this system is implemented with a lifestyle-oriented design procedure. It can facilitate the designers to quickly implement design and simulate on the wearing scenario, and evaluate and optimize their design. Due to the design of thermal quality clothing can be achieved without making physical prototypes, it is able to speed up the design cycle and reduce the design and development cost.
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Abbreviations
- C * :
-
Saturated water vapor concentration (kg m−3)
- C a :
-
Water vapor concentration in the air filling the inter-fiber void space (kg m−3)
- C f :
-
Water vapor concentration in the fibers of the fabric (kg m−3)
- C res :
-
Dry respiration heat loss (W m−2)
- C skA :
-
Convective heat loss from the skin in the area covered by clothing (W m−2)
- C skU :
-
Convective heat loss from the skin in the area uncovered by clothing (W m−2)
- D a :
-
Diffusion coefficient of water vapor in the air of the fabric (m2 s−1)
- D f :
-
Diffusion coefficient of water vapor in the fibers of the fabric (m2 s−1)
- DRY :
-
Dry heat loss from the human body (W m−2)
- E rsw :
-
Evaporative heat loss by regulatory sweating from skin (W m−2)
- E dif :
-
Diffusive heat loss from the skin surface (W m−2)
- E res :
-
Latent respiration heat loss (W m−2)
- E skA :
-
Evaporative heat loss from the skin in the area covered by clothing (W m−2)
- E skU :
-
Evaporative heat loss from the skin in the area uncovered by clothing (W m−2)
- Γ f :
-
Effective sorption rate of the moisture
- Γ lg :
-
Evaporation/condensation rate of the liquid/vapor
- M :
-
Metabolic rate of human body (W m−2)
- h lg :
-
Mass transfer coefficient for evaporation and condensation (m s−1)
- K min :
-
Minimum thermal conductance of body tissue (W m−2 K−1)
- K(x,t):
-
Effective thermal conductivity of the fabric, (W m−2 K−1)
- p h :
-
Proportion of dry heat loss at the clothing-covered area
- p m :
-
Proportion of moisture vapor from the skin at the clothing-covered area
- S cr :
-
The heat storage of the core (W m−2)
- S sk :
-
The heat storage of the skin (W m−2)
- r :
-
Fiber radius
- T :
-
Temperature of the fabric (K)
- T sk :
-
Temperature of skin surface (K)
- T cr :
-
Temperature of core (K)
- W :
-
Moisture transfer resistance (s m−1)
- V bl :
-
Skin blood flow rate (L h−1 m−2)
- ε a :
-
Volume fraction of water vapor
- ε f :
-
Volume fraction of fibers
- ε l :
-
Volume fraction of liquid phase
- ε :
-
Porosity of the fabric
- ρ l :
-
Density of the liquid water (kg m−3)
- τ a :
-
Effective tortuosity of the fabric for water vapor diffusion
- \( \xi_{1} \) :
-
Proportions of moisture sorption at the fiber surface covered by air
- λ v :
-
Heat of sorption or desorption of vapor by fibers (kJ kg−1)
- λ l :
-
Heat of sorption or desorption of liquid by fibers (kJ kg−1)
- σ :
-
Stenfan–Boltzmann constant, (W m−2 K−1)
- m s :
-
Sweat accumulation on the skin surface in (g s−1 m−2)
- p A :
-
Proportion of clothing-covered area
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Acknowledgments
The study was supported by the National Natural Science Foundations of China (Grant No. 61003173, 60973084), the Fundamental Research Funds for the Central Universities (Grant No. 2009ZM0128) and the Foundation for Distinguished Young Talents in Higher Education of Guangdong, China (Grant No. LYM10018).
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Mao, A., Luo, J., Li, Y. et al. Engineering design of thermal quality clothing on a simulation-based and lifestyle-oriented CAD system. Engineering with Computers 27, 405–421 (2011). https://doi.org/10.1007/s00366-011-0224-z
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DOI: https://doi.org/10.1007/s00366-011-0224-z