Determination of Clothing Evaporative Resistance on a Sweating Thermal Manikin in an Isothermal Condition: Heat Loss Method or Mass Loss Method?
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| Title: | Determination of Clothing Evaporative Resistance on a Sweating Thermal Manikin in an Isothermal Condition: Heat Loss Method or Mass Loss Method? |
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| Authors: | Wang, Faming1, Gao, Chuansi1, Kuklane, Kalev1, Holmér, Ingvar1 |
| Source: | Annals of Occupational Hygiene. Oct2011, Vol. 55 Issue 7, p775-783. 9p. |
| Subjects: | Prevention of psychological stress, Physics -- Methodology, Body temperature regulation, Heat, Research methodology, Research funding, Symptoms |
| Abstract: | This paper addresses selection between two calculation options, i.e heat loss option and mass loss option, for thermal manikin measurements on clothing evaporative resistance conducted in an isothermal condition (Tmanikin = Ta = Tr). Five vocational clothing ensembles with a thermal insulation range of 1.05–2.58 clo were selected and measured on a sweating thermal manikin ‘Tore’. The reasons why the isothermal heat loss method generates a higher evaporative resistance than that of the mass loss method were thoroughly investigated. In addition, an indirect approach was applied to determine the amount of evaporative heat energy taken from the environment. It was found that clothing evaporative resistance values by the heat loss option were 11.2–37.1% greater than those based on the mass loss option. The percentage of evaporative heat loss taken from the environment (He,env) for all test scenarios ranged from 10.9 to 23.8%. The real evaporative cooling efficiency ranged from 0.762 to 0.891, respectively. Furthermore, it is evident that the evaporative heat loss difference introduced by those two options was equal to the heat energy taken from the environment. In order to eliminate the combined effects of dry heat transfer, condensation, and heat pipe on clothing evaporative resistance, it is suggested that manikin measurements on the determination of clothing evaporative resistance should be performed in an isothermal condition. Moreover, the mass loss method should be applied to calculate clothing evaporative resistance. The isothermal heat loss method would appear to overestimate heat stress and thus should be corrected before use. [ABSTRACT FROM AUTHOR] |
| Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Determination of Clothing Evaporative Resistance on a Sweating Thermal Manikin in an Isothermal Condition: Heat Loss Method or Mass Loss Method? – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Faming%22">Wang, Faming</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gao%2C+Chuansi%22">Gao, Chuansi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kuklane%2C+Kalev%22">Kuklane, Kalev</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Holmér%2C+Ingvar%22">Holmér, Ingvar</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Annals+of+Occupational+Hygiene%22">Annals of Occupational Hygiene</searchLink>. Oct2011, Vol. 55 Issue 7, p775-783. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Prevention+of+psychological+stress%22">Prevention of psychological stress</searchLink><br /><searchLink fieldCode="DE" term="%22Physics+--+Methodology%22">Physics -- Methodology</searchLink><br /><searchLink fieldCode="DE" term="%22Body+temperature+regulation%22">Body temperature regulation</searchLink><br /><searchLink fieldCode="DE" term="%22Heat%22">Heat</searchLink><br /><searchLink fieldCode="DE" term="%22Research+methodology%22">Research methodology</searchLink><br /><searchLink fieldCode="DE" term="%22Research+funding%22">Research funding</searchLink><br /><searchLink fieldCode="DE" term="%22Symptoms%22">Symptoms</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This paper addresses selection between two calculation options, i.e heat loss option and mass loss option, for thermal manikin measurements on clothing evaporative resistance conducted in an isothermal condition (Tmanikin = Ta = Tr). Five vocational clothing ensembles with a thermal insulation range of 1.05–2.58 clo were selected and measured on a sweating thermal manikin ‘Tore’. The reasons why the isothermal heat loss method generates a higher evaporative resistance than that of the mass loss method were thoroughly investigated. In addition, an indirect approach was applied to determine the amount of evaporative heat energy taken from the environment. It was found that clothing evaporative resistance values by the heat loss option were 11.2–37.1% greater than those based on the mass loss option. The percentage of evaporative heat loss taken from the environment (He,env) for all test scenarios ranged from 10.9 to 23.8%. The real evaporative cooling efficiency ranged from 0.762 to 0.891, respectively. Furthermore, it is evident that the evaporative heat loss difference introduced by those two options was equal to the heat energy taken from the environment. In order to eliminate the combined effects of dry heat transfer, condensation, and heat pipe on clothing evaporative resistance, it is suggested that manikin measurements on the determination of clothing evaporative resistance should be performed in an isothermal condition. Moreover, the mass loss method should be applied to calculate clothing evaporative resistance. The isothermal heat loss method would appear to overestimate heat stress and thus should be corrected before use. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1093/annhyg/mer034 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 775 Subjects: – SubjectFull: Prevention of psychological stress Type: general – SubjectFull: Physics -- Methodology Type: general – SubjectFull: Body temperature regulation Type: general – SubjectFull: Heat Type: general – SubjectFull: Research methodology Type: general – SubjectFull: Research funding Type: general – SubjectFull: Symptoms Type: general Titles: – TitleFull: Determination of Clothing Evaporative Resistance on a Sweating Thermal Manikin in an Isothermal Condition: Heat Loss Method or Mass Loss Method? Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wang, Faming – PersonEntity: Name: NameFull: Gao, Chuansi – PersonEntity: Name: NameFull: Kuklane, Kalev – PersonEntity: Name: NameFull: Holmér, Ingvar IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2011 Type: published Y: 2011 Identifiers: – Type: issn-print Value: 00034878 Numbering: – Type: volume Value: 55 – Type: issue Value: 7 Titles: – TitleFull: Annals of Occupational Hygiene Type: main |
| ResultId | 1 |
