A model for managing and evaluating solar radiation for indoor thermal comfort

Gennusa, Maria La; Nucara, Antonino; Pietrafesa, Matilde; Rizzo, Gianfranco

doi:10.1016/j.solener.2006.09.005

Cited by 94 publications

(39 citation statements)

References 10 publications

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“…Moreover, diffuse and direct component of solar radiation may affect the main radiant temperature and the plane temperature asymmetry with different intensity [15][16][17][18], due to their different behavior inside indoor environment.…”

Section: Effect Of the Solar Radiationmentioning

confidence: 99%

The effect of the climatic condition on the radiant asymmetry

Marino¹,

Misiani²,

Nucara³

et al. 2017

IJHT

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This paper analyzes the influence of solar radiation, considering both its direct and diffuse component, on the local thermal comfort of subjects in indoor environments. In fact, as well as too hot or too cold climatic conditions may cause global thermal discomfort, an unwanted cooling or heating of a particular confined area of the body may cause local thermal discomfort, which may occur for vertical air temperature differences, unsuitable temperatures of the floor, drafts and radiant asymmetries. In this context, this work is focused on radiant asymmetry issues and it aims to analyze the radiant asymmetry dependence on outdoor climate parameters, with special regard to the solar radiation. To this purpose, a specific experimental campaign of measurements was conducted. The analysis of the results shows that the solar radiation alters the radiant field and produces a high radiant asymmetry in correspondence of the points of the environment directly irradiated by sunrays.

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Section: Effect Of the Solar Radiationmentioning

confidence: 99%

The effect of the climatic condition on the radiant asymmetry

Marino¹,

Misiani²,

Nucara³

et al. 2017

IJHT

Self Cite

View full text Add to dashboard Cite

show abstract

“…The discomfort due to solar radiation has been explored in previous studies, it was revealed that the warming effect of solar radiation may cause overheating and thus requires a cooling load to correct [3]. A theoretical analysis in a mild climate suggests there could be heat discomfort near a window area during the mid-day hours on a typical day in winter [4]. As thermal stimuli and solar radiation are identified as the major factors driving solar shading adjustments [5,6], solar shading might be adopted in winter by occupants in order to prevent possible overheating by solar irradiance.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the objectives of this study are (1) to analyze of the principles for winter solar design; (2) to propose a prototype of a shading device; (3) to determine the major configuration parameters that are suitable for architectural design, in practice; (4) to evaluate the individual and combined effects of the shading device in terms of energy, shading and daylighting performance by changing these parameters in simulation experiments; and (5) to identify the most effective parameters and balanced solutions.…”

Section: Introductionmentioning

confidence: 99%

Perforated Thermal Mass Shading: An Approach to Winter Solar Shading and Energy, Shading and Daylighting Performance

Huang

Zhao

2017

Energies

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Direct solar irradiance may cause thermal discomfort, even in winter when the ambient temperature is low and especially for high-altitude locations with a high intensity of solar radiation. Thus winter solar shading might be required and, if used, must achieve a balance between the prevention of the transmittance of solar irradiance, the utilization of passive solar heat and the supply of adequate natural daylighting. These considerations render conventional solutions of solar shading inapplicable in the winter. In this paper, a novel approach to perforated thermal mass shading for winter is reported and examined. The impacts of the perforated percentage and the opening positions of this shading device on energy, shading and daylighting performance were assessed for south-and west-facing orientations. A range of perforated percentages and vertical and horizontal positions were tested using simulations by Energyplus and Daysim. Our results indicate that the proposed perforated thermal mass shading is efficient for the integrated performance of shading, daylighting and energy savings in the south-facing orientation, while it achieves acceptable performance in shading and daylighting in the west-facing orientation for a high-altitude cold climate.

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“…The results of the study (thermal performance) are all based on one chosen local design condition. La Gennusa et al [11] have developed a model to manage and evaluate the effect of the solar radiation for indoor thermal comfort. Ibrahim et al [12] have done the study on the effect of the radiant temperature on thermal comfort in a room without the glass window.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Human Thermal Comfort from a Glass Window

Khamporn¹,

Chaiyapinunt²

2014

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Abstract. The effect of the glass window on the thermal comfort of a person sitting near the glass window is investigated by performing the experiment in a test room. A clear glass window and a tinted glass window are chosen to be the test windows in this study. The index chosen to describe the thermal comfort is the predicted percentage of dissatisfied (PPD). The important parameter for evaluating the human thermal comfort condition is the mean radiant temperature. The mathematical model for predicting the mean radiant temperature is presented. The predicted mean radiant temperature and the mean radiant temperature evaluated from the operative temperature are compared. The agreement is good. It is found that the mean radiant temperature, the predicted mean vote (PMV) and the PPD are all dependent on the transmitted solar radiation and the surface temperature of the glass window. Higher value of the mean radiant temperature yields higher value of the PMV and the PPD. The room with a clear glass window installed has a high thermal discomfort condition which is mainly come from the solar radiation. The amount of the thermal discomfort is directly varied with the amount of the transmitted solar radiation. For a high transmittance glass window, the thermal discomfort due to solar radiation is greater than the thermal discomfort due to surface temperature. For a low transmittance (high absorptance) glass window, the thermal discomfort due to surface temperature becomes important when compared to the thermal discomfort in the part of solar radiation.

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A model for managing and evaluating solar radiation for indoor thermal comfort

Cited by 94 publications

References 10 publications

The effect of the climatic condition on the radiant asymmetry

The effect of the climatic condition on the radiant asymmetry

Perforated Thermal Mass Shading: An Approach to Winter Solar Shading and Energy, Shading and Daylighting Performance

An Investigation on the Human Thermal Comfort from a Glass Window

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