An analysis of temperature and moisture variations in the ground under natural climatic conditions

Matsumoto, Mamoru; Iwamae, Atsushi

doi:10.1016/0378-7788(88)90038-2

Cited by 17 publications

(8 citation statements)

References 4 publications

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“…At the same time, the measurement is analyzed using the diffusion model. The moisture movement in sand under gravity has been investigated by other researchers [14,15], and the validity of applying the same model to the clothing is investigated in the present paper.…”

Section: Introductionmentioning

confidence: 93%

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Experimental and Analytical Investigation of Moisture Movement in Clothing

Takada

Hokoi

Kumaran

2007

Journal of Building Physics

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1177/1744259107081648Journal of Building Physics, 31, pp. 125-142, 2007-10-01 Experimental and analytical investigation of moisture movement in clothing Takada, S.; Hokoi, S.; Kumaran, M. K. Journal of Building Physics, 31, no. 2, pp. 125 -142, October 01, 2007, DOI: 10.1177 The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. AbstractIn order to design an efficient air-conditioning system, the specifics of the transient thermal and physiological responses of a human body to the hygrothermal environment should be taken into account. This response will strongly depend on the behavior of heat and moisture transport, and moisture accumulation in the clothing, especially when sweat exists in and around the clothing. As a basic information on this problem, a model of the moisture transfer in cloth is necessary.In this paper, a model of the liquid moisture movement in clothing under gravity is developed and applied, based on a diffusion model. Firstly, the moisture diffusivity is determined from the investigation of the moisture absorption process in the horizontal direction where gravity has no influence on the moisture movement. Secondly with the use of the moisture diffusivity thus determined, a moisture absorption process in the upward direction against gravity is investigated. The validity of the parameter related to the gravity effect is examined by comparing the results of numerical calculations with the experimental results obtained from the gamma-ray method. Since the two agree generally well, the parameters viz. liquid moisture diffusivity and sorption isotherm derived here for a sample of broadcloth are considered reliable.

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Section: Introductionmentioning

confidence: 93%

“…The moisture flux in a porous material under gravity is expressed in two ways as follows [14,15]. When the dependence of the equilibrium relationship on temperature can be neglected, the second term on the right-hand side of equation (3) becomes zero.…”

Section: Basic Equationsmentioning

confidence: 99%

Experimental and Analytical Investigation of Moisture Movement in Clothing

Takada

Hokoi

Kumaran

2007

Journal of Building Physics

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“…The variations of the thermal capacity are less manifest, but it still doubles or triples from the dry to the wet state. Complementarily, Matsumoto and Iwamae [7] computed the one-dimensional transfers of heat and moisture in soil. An important variation of the moisture content was noted for the first metres under the surface.…”

Section: Building Heat Loss Via the Ground And Soil Moisture Transfermentioning

confidence: 99%

The influence of soil moisture transfer on building heat loss via the ground

Janssen

Carmeliet

Hens

2004

Building and Environment

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In this paper, the influence of soil moisture transfer on building heat loss via the ground is investigated by comparing fully coupled simulations with linear thermal simulations. The observed influences of coupling are (1) the larger amplitude of surface temperature, (2) the variation of thermal conductivity with moisture content, and (3) the advection of sensible heat by liquid transfer. In a parameter study, it is shown that these conclusions hold for a variety of climates, soils and foundation constructions. However, given the current accuracy level of standard methods, the integration of coupling effects in these calculation methods cannot be defended.

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“…The basement measured 3.5m × 2.0m × 2.0m (see Figs.2. and 3), with a floor area and volume of 7m 2 and 14m 3 , respectively. Once the basement was installed underground, the roof was at a depth of 1.0m below the ground level.…”

Section: Outline Of the Experiments 21 Experimental Basementmentioning

confidence: 99%

Study on the Heat Load Characteristics of Underground Structures

Park

Nagai

Iwata

2006

Journal of Asian Architecture and Building Engineering

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This study is being conducted to clarify the heat load characteristics of underground structures. The authors have sought to achieve this by clarifying the heat and moisture behavior of an underground basement and surrounding ground, and acquiring basic data for computational analysis. This paper presents measurement results acquired over approximately one year of field experiments on an underground experimental basement under internal heat generation conditions, commenced in October 2004. The authors also present the results of analyses on the heat and moisture behavior of the experimental basement and ground, the influence of internal heat generation on the surrounding ground, the condensation behavior, the interrelationship between precipitation and the fluctuation of moisture content in the ground, the annual mean heating load per unit area, and other factors.

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An analysis of temperature and moisture variations in the ground under natural climatic conditions

Cited by 17 publications

References 4 publications

Experimental and Analytical Investigation of Moisture Movement in Clothing

Experimental and Analytical Investigation of Moisture Movement in Clothing

The influence of soil moisture transfer on building heat loss via the ground

Study on the Heat Load Characteristics of Underground Structures

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