Convective heat transfer coefficient relating to evaluation of thermal environment of infant
Infants have a low capacity to thermally adapt to their environment and so sufficient consideration must be given to their thermal environment. In investigating an infant's thermal environment, the purpose of this study is to clarify the heat transfer coefficient in natural convection for the p...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844022033643 |
| _version_ | 1828071274292707328 |
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| author | Yoshihito Kurazumi Kenta Fukagawa Tomonori Sakoi Ken Yamashita Akie Naito Motoe Imai Yoshiaki Yamato Emi Kondo Tadahiro Tsuchikawa |
| author_facet | Yoshihito Kurazumi Kenta Fukagawa Tomonori Sakoi Ken Yamashita Akie Naito Motoe Imai Yoshiaki Yamato Emi Kondo Tadahiro Tsuchikawa |
| author_sort | Yoshihito Kurazumi |
| collection | DOAJ |
| description | Infants have a low capacity to thermally adapt to their environment and so sufficient consideration must be given to their thermal environment. In investigating an infant's thermal environment, the purpose of this study is to clarify the heat transfer coefficient in natural convection for the posture of an infant in a stroller. The heat transfer coefficients were measured by means of using a thermal manikin. The experimental thermal environment conditions were set for eight cases, at: 16 °C, 18 °C, 20 °C, 22 °C, 24 °C, 26 °C, 28 °C, and 30 °C, and the air and wall surface temperatures were equalized, creating a homogeneous thermal environment. The air velocity (less than 0.2 m/s) and relative humidity (50%RH) were the same for each case. The surface temperature of each part of the thermal manikin was controlled to 34 °C. The difference between the mean surface temperature and air temperature (ΔT [K]) is the driving force for the heat transfer coefficient in natural convection for the posture of an infant in a stroller (hc [W/(m2·K)]). We propose the use of the empirical formula hc = 2.16 ΔT 0.23. The formula of the convective heat transfer coefficient in natural convection of this study can be applied to infants up to about 3 years old. |
| first_indexed | 2024-04-11T00:51:58Z |
| format | Article |
| id | doaj.art-3243db488bf74cdc8b2eab1add2bd8f1 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-11T00:51:58Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-3243db488bf74cdc8b2eab1add2bd8f12023-01-05T08:38:24ZengElsevierHeliyon2405-84402022-12-01812e12076Convective heat transfer coefficient relating to evaluation of thermal environment of infantYoshihito Kurazumi0Kenta Fukagawa1Tomonori Sakoi2Ken Yamashita3Akie Naito4Motoe Imai5Yoshiaki Yamato6Emi Kondo7Tadahiro Tsuchikawa8School of Life Studies, Sugiyama Jogakuen University, Nagoya, Japan; Corresponding author.Department of Environmental Science and Technology, Meijo University, JapanDepartment of Advanced Textile and Kansei Engineering, Shinshu University, Ueda, JapanSchool of Life Studies, Sugiyama Jogakuen University, Nagoya, JapanInstitute for Global Leadership, Ochanomizu University, Tokyo, JapanGraduate School of Life Studies, Sugiyama Jogakuen University, Nagoya, JapanDepartment of Architecture and Structural Engineering, Kure National College of Technology, Kure, JapanDepartment of Comprehensive Engineering, Kindai University Technical College, Nabari, JapanSchool of Human Science & Environment, University of Hyogo, Himeji, JapanInfants have a low capacity to thermally adapt to their environment and so sufficient consideration must be given to their thermal environment. In investigating an infant's thermal environment, the purpose of this study is to clarify the heat transfer coefficient in natural convection for the posture of an infant in a stroller. The heat transfer coefficients were measured by means of using a thermal manikin. The experimental thermal environment conditions were set for eight cases, at: 16 °C, 18 °C, 20 °C, 22 °C, 24 °C, 26 °C, 28 °C, and 30 °C, and the air and wall surface temperatures were equalized, creating a homogeneous thermal environment. The air velocity (less than 0.2 m/s) and relative humidity (50%RH) were the same for each case. The surface temperature of each part of the thermal manikin was controlled to 34 °C. The difference between the mean surface temperature and air temperature (ΔT [K]) is the driving force for the heat transfer coefficient in natural convection for the posture of an infant in a stroller (hc [W/(m2·K)]). We propose the use of the empirical formula hc = 2.16 ΔT 0.23. The formula of the convective heat transfer coefficient in natural convection of this study can be applied to infants up to about 3 years old.http://www.sciencedirect.com/science/article/pii/S2405844022033643Heat transfer coefficientInfantNatural convectionStrollerThermal environment |
| spellingShingle | Yoshihito Kurazumi Kenta Fukagawa Tomonori Sakoi Ken Yamashita Akie Naito Motoe Imai Yoshiaki Yamato Emi Kondo Tadahiro Tsuchikawa Convective heat transfer coefficient relating to evaluation of thermal environment of infant Heliyon Heat transfer coefficient Infant Natural convection Stroller Thermal environment |
| title | Convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| title_full | Convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| title_fullStr | Convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| title_full_unstemmed | Convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| title_short | Convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| title_sort | convective heat transfer coefficient relating to evaluation of thermal environment of infant |
| topic | Heat transfer coefficient Infant Natural convection Stroller Thermal environment |
| url | http://www.sciencedirect.com/science/article/pii/S2405844022033643 |
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