Interrelation between mean radiant temperature and room geometry

Kalmár, Ferenc; Kalmár, Tünde

doi:10.1016/j.enbuild.2012.08.025

Cited by 52 publications

(25 citation statements)

References 20 publications

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“…In the European Union, buildings account for about 20 -40% of the total energy consumption [1][2][3][4]. This energy consumption contributes to producing around 25 -30% of CO2 emissions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the moisture induced degradation of the thermal properties of aerogel blankets: Measurements, calculations, simulations

Lakatos

2017

Energy and Buildings

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Please cite this article as:Ákos Lakatos, Investigation of the moisture induced degradation of the thermal properties of Aerogel blankets: measurements, calculations, simulations, Energy and Buildings http://dx.doi.org/10. 1016/j.enbuild.2017.01.054 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Investigation of the moisture induced degradation of the thermal properties of Graphical abstractIn the graphical abstract one can see an aerogel blanket between a source (warm, T1) and a sink (cold, T2). The fast ways of the heat through the moist paths of the blanket are visible from wall to wall. These fast ways are representing the moisture increased conductive and convective part of the thermal conductivity of aerogel. The ways of the heat through the dry paths are also visible.

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“…In the European Union, buildings account for about 20 -40% of the total energy consumption [1][2][3][4]. This energy consumption contributes to producing around 25 -30% of CO2 emissions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the moisture induced degradation of the thermal properties of aerogel blankets: Measurements, calculations, simulations

Lakatos

2017

Energy and Buildings

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“…Standards for thermal comfort can be found in the EN 15251 [86] and the ASHRAE 55 [46]. These define two thermal comfort models for the design and assessment of buildings: the predicted mean vote (PMV) method (defined in ISO 7730 [91]), and the adaptive method.…”

Section: Thermal Comfort Evaluationmentioning

confidence: 99%

“…A c c e p t e d M a n u s c r i p t 3 Current research also follows a long seen research line of thermal field studies, which seek to validate thermal the Predicted Mean Vote or the adaptive model [44][45][46], adapt them to other climates [47], or to further investigate the relationship between people, comfort and buildings [48][49][50]. However, field studies of thermal comfort and occupant behaviour are extending their research methods to include also large datasets, online applications, and personal sensors, among others.…”

Section: Introductionmentioning

confidence: 99%

In-use monitoring of buildings: An overview and classification of evaluation methods

Guerra-Santin

Christopher

2015

Energy and Buildings

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“…Therefore, mean radiant temperature depends on the room geometry, insulation level, position of windows and the type of the installed heating/cooling system. In case of heating, mean radiant temperature can be reduced by increasing the heated surface and decreasing the surface of a heat emitter [8].…”

Section: Introductionmentioning

confidence: 99%

Study of Operative Temperature Using the Novel Detail Approach in Determining Mean Radiant Temperature – Comparison Between Wall-Mounted Convector and Conventional Radiator

Tomorad

Horvat

Dović

2018

TFAMENA

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SummaryMost of the physical parameters that are used to assess the satisfaction with the ambient thermal condition in a mathematical way are contained within the definition of operative temperature. This temperature, which can be used as a representative of indoor thermal comfort, is a function of the air temperature, the mean radiant temperature and the relative air velocity.In this paper, the room air, mean radian temperature and indoor air velocity were determined experimentally for wall-mounted convector and conventional radiator at controlled room conditions. The room air temperature and indoor air velocity were continuously measured at several positions and heights (0.75 m and 1.5 m) using calibrated T-type thermocouples and hot wire probes, while mean radiant temperature was calculated using the thermograms captured by the IR thermal camera and numerically computed radiation view factors. Each wall was divided into several sections with approximately similar temperatures (differences < 0.5 °C) for which view factors were determined. Thermal heat output of the tested heat emitters was derived according to EN 442-2:2014. Obtained results were analysed and conclusions about the achieved thermal comfort and related energy saving were made accordingly. Key words:Mean radiant temperature, operative temperature, thermal comfort, thermography, heat emitters IntroductionEuropean and national regulations based on EPBD (Energy Performance of Buildings Directive) seek to decrease energy consumption in buildings, without decreasing the thermal comfort, to achieve goals which include emission control and reduction of primary energy consumption. Prevision and assessment of energy consumption in households are essential items in achieving these goals. Heating, ventilation and air conditioning systems (HVAC) account for over 60% of total energy consumption in buildings [1]. High energy consumption of traditional HVAC systems is based on the aspirations to achieve and maintain uniform air temperature in rooms, preferably at an interval of 2°C [2]. However, recent research has shown that the overall satisfaction with thermal comfort was accomplished in only 11% of buildings [2].

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Interrelation between mean radiant temperature and room geometry

Cited by 52 publications

References 20 publications

Investigation of the moisture induced degradation of the thermal properties of aerogel blankets: Measurements, calculations, simulations

Investigation of the moisture induced degradation of the thermal properties of aerogel blankets: Measurements, calculations, simulations

In-use monitoring of buildings: An overview and classification of evaluation methods

Study of Operative Temperature Using the Novel Detail Approach in Determining Mean Radiant Temperature – Comparison Between Wall-Mounted Convector and Conventional Radiator

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