The Experts below are selected from a list of 513 Experts worldwide ranked by ideXlab platform

Jie Luo - One of the best experts on this subject based on the ideXlab platform.

  • numerical simulation of thermal behaviors of a Clothed Human Body with evaluation of indoor solar radiation
    Applied Thermal Engineering, 2017
    Co-Authors: Aihua Mao, Jie Luo
    Abstract:

    Abstract Solar radiation is a valuable green energy, which is important in achieving a successful building design for thermal comfort in indoor environment. This paper considers solar radiation indoors into the transient thermal transfer models of a Clothed Human Body and offers a new numerical method to analyze the dynamic thermal status of a Clothed Human Body under different solar radiation incidences. The evaluation model of solar radiation indoors and a group of coupled thermal models of the Clothed Human Body are developed and integrated. The simulation capacities of these integrated models are validated through a comparison between the predicted results and the experimental data in reference. After that, simulation cases are also conducted to show the influence of solar radiation on the thermal status of individual Clothed Body segments when the Human Body is staying indoors in different seasons. This numerical simulation method provides a useful tool to analyze the thermal status of Clothed Human Body under different solar radiation incidences indoors and thus enables the architect to efficiently utilize the green solar energy in building development.

Manhao Guan - One of the best experts on this subject based on the ideXlab platform.

  • development of a sweating thermal skin simulant for heat transfer evaluation of Clothed Human Body under radiant heat hazard
    Applied Thermal Engineering, 2020
    Co-Authors: Manhao Guan, Haijiang Zhang, Fabrizio Spano, Martin Camenzind, Simon Annaheim, Rene M Rossi
    Abstract:

    Abstract Human perspiration highly affects Body heat dissipation as well as heat and mass transfer in clothing systems. Nevertheless, current skin simulant systems for assessing heat transfer under high heat exposures simply simulate the dry skin state. This fact limits the validity of such systems as perspiration and mass transfer exist during high heat exposure conditions. In this study, an active sweating skin simulant was developed using the polydimethylsiloxane material and with controllable sweat rates for heat transfer assessment under radiant heat hazards, considering mass transfer as well. In the dry state, the temperature and its variation rate of the skin simulant with water-filled sweating channels showed good agreement with the ISO standard numerical model. For sweating conditions, the results showed that the wet conduction facilitated heat transfer towards the skin by 5–8 % at the beginning of sweating. With continuous sweat release, the surface temperature rise was attenuated due to the additional heat capacity induced by additional moisture in the clothing-skin system. The low standard deviations, below 2 °C, and coefficients of variation, below 10%, for the temperature measurements under various sweat rates, indicated good reproducibility of the skin simulant. This research provides the first approach to consider active sweating in skin simulant systems under high heat exposures. This further provides new insights into heat transfer in protective clothing-Human skin systems under extreme heat exposures, contributing to realistically evaluating the thermal protective performance of clothing materials under sweating conditions.

  • Effect of perspired moisture and material properties on evaporative cooling and thermal protection of the Clothed Human Body exposed to radiant heat
    Textile Research Journal, 2018
    Co-Authors: Manhao Guan, Agnes Psikuta, Sumit Mandal
    Abstract:

    Perspired moisture plays a crucial role in the thermal physiology and protection of the Human Body wearing thermal protective clothing. Until now, the role of continuous sweating on heat transfer, ...

Aihua Mao - One of the best experts on this subject based on the ideXlab platform.

  • numerical simulation of thermal behaviors of a Clothed Human Body with evaluation of indoor solar radiation
    Applied Thermal Engineering, 2017
    Co-Authors: Aihua Mao, Jie Luo
    Abstract:

    Abstract Solar radiation is a valuable green energy, which is important in achieving a successful building design for thermal comfort in indoor environment. This paper considers solar radiation indoors into the transient thermal transfer models of a Clothed Human Body and offers a new numerical method to analyze the dynamic thermal status of a Clothed Human Body under different solar radiation incidences. The evaluation model of solar radiation indoors and a group of coupled thermal models of the Clothed Human Body are developed and integrated. The simulation capacities of these integrated models are validated through a comparison between the predicted results and the experimental data in reference. After that, simulation cases are also conducted to show the influence of solar radiation on the thermal status of individual Clothed Body segments when the Human Body is staying indoors in different seasons. This numerical simulation method provides a useful tool to analyze the thermal status of Clothed Human Body under different solar radiation incidences indoors and thus enables the architect to efficiently utilize the green solar energy in building development.

Rene M Rossi - One of the best experts on this subject based on the ideXlab platform.

  • development of a sweating thermal skin simulant for heat transfer evaluation of Clothed Human Body under radiant heat hazard
    Applied Thermal Engineering, 2020
    Co-Authors: Manhao Guan, Haijiang Zhang, Fabrizio Spano, Martin Camenzind, Simon Annaheim, Rene M Rossi
    Abstract:

    Abstract Human perspiration highly affects Body heat dissipation as well as heat and mass transfer in clothing systems. Nevertheless, current skin simulant systems for assessing heat transfer under high heat exposures simply simulate the dry skin state. This fact limits the validity of such systems as perspiration and mass transfer exist during high heat exposure conditions. In this study, an active sweating skin simulant was developed using the polydimethylsiloxane material and with controllable sweat rates for heat transfer assessment under radiant heat hazards, considering mass transfer as well. In the dry state, the temperature and its variation rate of the skin simulant with water-filled sweating channels showed good agreement with the ISO standard numerical model. For sweating conditions, the results showed that the wet conduction facilitated heat transfer towards the skin by 5–8 % at the beginning of sweating. With continuous sweat release, the surface temperature rise was attenuated due to the additional heat capacity induced by additional moisture in the clothing-skin system. The low standard deviations, below 2 °C, and coefficients of variation, below 10%, for the temperature measurements under various sweat rates, indicated good reproducibility of the skin simulant. This research provides the first approach to consider active sweating in skin simulant systems under high heat exposures. This further provides new insights into heat transfer in protective clothing-Human skin systems under extreme heat exposures, contributing to realistically evaluating the thermal protective performance of clothing materials under sweating conditions.

Li Y - One of the best experts on this subject based on the ideXlab platform.

  • Numerical simulation of thermal behaviors of a Clothed Human Body with evaluation of indoor solar radiation
    Pergamon Press, 2017
    Co-Authors: Mao A, Luo J, Li Y
    Abstract:

    Solar radiation is a valuable green energy, which is important in achieving a successful building design for thermal comfort in indoor environment. This paper considers solar radiation indoors into the transient thermal transfer models of a Clothed Human Body and offers a new numerical method to analyze the dynamic thermal status of a Clothed Human Body under different solar radiation incidences. The evaluation model of solar radiation indoors and a group of coupled thermal models of the Clothed Human Body are developed and integrated. The simulation capacities of these integrated models are validated through a comparison between the predicted results and the experimental data in reference. After that, simulation cases are also conducted to show the influence of solar radiation on the thermal status of individual Clothed Body segments when the Human Body is staying indoors in different seasons. This numerical simulation method provides a useful tool to analyze the thermal status of Clothed Human Body under different solar radiation incidences indoors and thus enables the architect to efficiently utilize the green solar energy in building development.Institute of Textiles and Clothin

  • A transient 3-D thermal model for Clothed Human Body considering more real geometry
    2013
    Co-Authors: Li F, Wang Y, Li Y
    Abstract:

    Based on the finite element method a transient 3- D Clothed Human thermoregulation model is developed. Geometry information of Human Body is obtained by 3-D scanning data. The controlled system of Human Body includes three sub-systems which are the tissue system, the circulatory system, and the respiratory system. The 6-node wedge and 8-node block isoparametric elements are used to simulate the Human Body tissues. The mechanisms of coupled heat and moisture transfer in clothing are considered. Then, the Human model is interfaced with the clothing model by using the boundary conditions, and the equations of the models are solved by finite element method. Finally, the nude and Clothed Human Body model predictions are compared with the published experimental data at a variety of ambient conditions, and a series of 3-D figures to show the prediction results of the temperature and water vapor concentration distributions is given.Institute of Textiles and Clothin