Modeling the comfort effects of short-wave solar radiation indoors

Arens, Edward; Hoyt, Tyler; Zhou, Xin; Huang, Li; Zhang, Hui; Schiavon, Stefano

doi:10.1016/j.buildenv.2014.09.004

Cited by 123 publications

(72 citation statements)

References 11 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The solar parameter is the one that affects the perception of comfort and discomfort the most [22]. The computer simulations investigated the key solar parameters currently used to assess the perception of comfort and discomfort inside lightweight and translucent envelopes [22,[38][39][40]. It includes the ERF (effective radiant field), which describes the additional (positive or negative) longwave radiation energy at the body surface when surrounding surface temperatures are different from the air temperature and the MRT (mean radiant temperature) which describes the surrounding surface temperature of a space.…”

Section: Methodsmentioning

confidence: 99%

Performance Analyses of Temporary Membrane Structures: Energy Saving and CO2 Reduction through Dynamic Simulations of Textile Envelopes

Vita¹,

Beccarelli²,

Laurini³

et al. 2018

Sustainability

View full text Add to dashboard Cite

Abstract:The aim of this research, carried out in collaboration with Maco Technology Inc., was to analyse the energy performance of temporary textile structures that are often used to host itinerant events. This paper illustrates the dynamic simulations carried on the Ducati Pavilion, designed by Maco Technology, which hosted Ducati staff during the different stages of the Superbike World Championship. Specific aspects relating to the structural/constructive system of the project were also analysed. The theme of energy saving and carbon reduction is of great importance in temporary and itinerant structures and environmental sustainability in relation to the materials used, storage, re-use, mode of transport and ability to respond efficiently to the climatic conditions of the installation sites is an important aspect. The Ducati Pavilion was modelled and analysed from an energy point of view using Design Builder software. Ways of improving performance were analysed under summer conditions. The paper focuses on the importance of optimizing the performance of textile envelopes: the methodology proposed allows visible savings in terms of energy consumption and achieves good levels of environmental comfort in temporary buildings with low thermal mass structure.

show abstract

Section: Methodsmentioning

confidence: 99%

Performance Analyses of Temporary Membrane Structures: Energy Saving and CO2 Reduction through Dynamic Simulations of Textile Envelopes

Vita¹,

Beccarelli²,

Laurini³

et al. 2018

Sustainability

View full text Add to dashboard Cite

show abstract

“…Secondly, the methodology implemented in SolarCal (Arens et al, 2015) was applied, and another equivalent PMV index (PMV**) was assessed and compared with the PMV*.…”

Section: Equationmentioning

confidence: 99%

“…The software returns the additional mean radiant temperature (MRT) in order to evaluate a solar-adjusted MRT. Standard literature values to define the environment (floor reflectance), the geometry of the problem, the position of the user and the user surface property (sky vault fraction, fraction of body, skin absorptivity) were used (Arens et al, 2015).…”

Section: Equationmentioning

confidence: 99%

See 1 more Smart Citation

Responsive glazing systems: Characterisation methods, summer performance and implications on thermal comfort

et al. 2017

View full text Add to dashboard Cite

Abstract:In recent years, there have been several experimental and numerical researches on transparent envelope components that integrate phase change materials (PCMs). To address some of the drawbacks of these systems, new prototypes were created and their summer performance was monitored under Cfa climatic conditions (Turin, Italy). The proposed glazing system comprises a triple glazing unit with a thermotropic layer placed on the outer side, acting as a switchable shading system capable of regulating the phase transition of the PCM. The PCM is tested in both the inner and the outer cavity of the glazing, alternately. In this paper, the summer performance of these responsive glazing systems is reported, complementing the assessment of their performance under winter conditions, which was previously presented in another paper (Bianco et al., 2017). Two additional systems were also tested in parallel for reference purposes: a triple glazing unit with a thermotropic layer only, and a reference triple glazing unit. Direct solar transmission was assessed, and the correlation between glazing temperature and solar transmission coefficient of the thermotropic layer, when coupled with the triple glazing unit, was derived. The solar transmission as a function of the external surface temperature of the PCM glazing units was also evaluated. The energy performance was assessed by means of a long-term evaluation in addition to daily analyses during cloudy and sunny days. The capability of the aforementioned technologies to improve indoor thermal comfort was investigated, with the effect of the transmitted solar radiation impinging on the occupants also taken into account. The results highlight that the integration of a thermotropic layer in a triple glazing unit allows the cooling load through the transparent component to be reduced by one third when compared to a traditional triple glazing unit. The overall energy performance was found to be primarily affected by the position of the PCM; not only during winter season, but especially in summer, the PCM completed the phase transition only when placed in the outermost cavity. The thermal comfort conditions were improved, when evaluated in terms of traditional PMV, regardless of the position of the PCM layer. However, when the influence of the direct solar radiation impinging on the occupants was taken into account, the solution with the PCM layer located in the inner cavity presented a better performance.

show abstract

“…This would cause a negative impact on the energy-saving design [2]. 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].…”

Section: Introductionmentioning

confidence: 99%

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

Huang

Zhao

2017

Energies

View full text Add to dashboard Cite

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.

show abstract

Modeling the comfort effects of short-wave solar radiation indoors

Cited by 123 publications

References 11 publications

Performance Analyses of Temporary Membrane Structures: Energy Saving and CO2 Reduction through Dynamic Simulations of Textile Envelopes

Performance Analyses of Temporary Membrane Structures: Energy Saving and CO2 Reduction through Dynamic Simulations of Textile Envelopes

Responsive glazing systems: Characterisation methods, summer performance and implications on thermal comfort

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

Contact Info

Product

Resources

About