Solar control: A general method for modelling of solar gains through complex facades in building simulation programs

Kuhn, Tilmann E.; Herkel, Sebastian; Frontini, Francesco; Strachan, Paul; Kokogiannakis, Georgios

doi:10.1016/j.enbuild.2010.07.015

Cited by 43 publications

(28 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9 [24,25]. This study aims to determine if bi-directional information, especially angle dependant g-value, provides more accurate results for heating and cooling loads [26].…”

Section: Energy Performancementioning

confidence: 99%

See 1 more Smart Citation

An hourly based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems

Appelfeld

McNeil

Svendsen

2012

Energy and Buildings

View full text Add to dashboard Cite

TitleAn hourly-based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems This article evaluates the performance of an integrated micro structural perforated shading screen (MSPSS). Such a system maintains a visual connection with the outdoors while imitating the shading functionality of a venetian blind. Building energy consumption is strongly influenced by the solar gains and heat transfer through the transparent parts of the fenestration systems. MSPSS is angular-dependent shading device that provides an effective strategy in the control of daylight, solar gains and overheating through windows. The study focuses on using direct experimental methods to determine bi-directional transmittance properties of shading systems that are not included as standard shading options in readily available building performance simulation tools. The impact on the indoor environment, particularly temperature and daylight were investigated and compared to three other static complex fenestration systems. The bi-directional description of the systems was used throughout the article. The simulations were validated against outdoor measurements of solar and light transmittance.

show abstract

“…9 [24,25]. This study aims to determine if bi-directional information, especially angle dependant g-value, provides more accurate results for heating and cooling loads [26].…”

Section: Energy Performancementioning

confidence: 99%

“…The ESP-r model for using bi-directional information about solar energy transmittance is called Black-Box-Model and was validated [6,24,26]. The model 5° resolution for azimuth and altitude incident angles on the surface of the CFS.…”

Section: Energy Performancementioning

confidence: 99%

An hourly based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems

Appelfeld

McNeil

Svendsen

2012

Energy and Buildings

View full text Add to dashboard Cite

show abstract

“…(1)- (4)) is based on the equations from Rosenfeld (1996), Roos et al (2000Roos et al ( , 2001, Kuhn (2006), and Kuhn et al (2011), validated by Platzer (2000), Rosenfeld et al (2000), Karlsson and Roos (2000), Roos et al (2000), and Karlsson et al (2001). Thus, it was possible to calculate, based on the values presented in Table 2 9.5% 0% 0% 0% 0% 0% 0% 0% 0% 0.5% 2% 3% 3% 3% 3% 2% 0.5% 0% 0% 0% 0% 0% 0% 0% 0% 0% 1% 1% 1% 1% 1% 1% 1% 1% 2% 3% 3% 3% 3% 2% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% As the determination of the sets of optical properties is a function of the orientation of the facade, it is necessary to create a file for each of the geographical orientations studied with EC (east, south and west), in a format recognized by the simulator (Frontini et al, 2009).…”

Section: Control Of the Electrochromic Glassmentioning

confidence: 99%

Evaluation of electrochromic windows impact in the energy performance of buildings in Mediterranean climates

et al. 2014

View full text Add to dashboard Cite

Energy performance analysis of Electrochromic (EC) windows is carried out. EC glass and control strategies are modeled and implemented in ESP-r. EC windows are evaluated, on a test prototype, as an alternative to shading devices. Set-points and measured variables are used to control optical properties of EC glass. Within this context, the paper focuses on the energy savings that may occur when using electrochromic (EC) windows, an interesting emerging technology alternative to shading devices to control solar gain in buildings located in Mediterranean climates. The EC windows technology is briefly presented and the optical properties adjustments of the glasses are discussed according to the operated range. The EC window dynamic behavior and the different control strategies are modeled and implemented in the ESP-r building simulation program. The EC window impact in the energy needs for heating and cooling is studied, considering different ambient parameters (exterior dry bulb temperature, interior dry bulb temperature and incident radiation) and set points for the EC control. A comparison of several windows solutions (single, double-glazing and EC windows), the type of building, internal gains from occupancy, lighting and equipment and the orientation of windows are considered for discussion through the analysis of the energy needs for heating and cooling. It is concluded that for this climate the best positive results are obtained when the EC are used in the west façade. For the south façade the results show no significant advantages in using EC windows.

show abstract

“…For assessments of thermal comfort, models must accurately predict solar heat gain depending on the incident direction of solar irradiation [7]. Visual comfort assessments rely on models that replicate not only the total flux, but the distribution of light into the building interior, adding the outgoing direction as a second independent variable.…”

Section: Introductionmentioning

confidence: 99%

Computational Combination of the Optical Properties of Fenestration Layers at High Directional Resolution

Grobe

2017

Buildings

View full text Add to dashboard Cite

Abstract:Complex fenestration systems typically comprise co-planar, clear and scattering layers. As there are many ways to combine layers in fenestration systems, a common approach in building simulation is to store optical properties separate for each layer. System properties are then computed employing a fast matrix formalism, often based on a directional basis devised by JHKlems comprising 145 incident and 145 outgoing directions. While this low directional resolution is found sufficient to predict illuminance and solar gains, it is too coarse to replicate the effects of directionality in the generation of imagery. For increased accuracy, a modification of the matrix formalism is proposed. The tensor-tree format of RADIANCE, employing an algorithm subdividing the hemisphere at variable resolutions, replaces the directional basis. The utilization of the tensor-tree with interfaces to simulation software allows sharing and re-use of data. The light scattering properties of two exemplary fenestration systems as computed employing the matrix formalism at variable resolution show good accordance with the results of ray-tracing. Computation times are reduced to 0.4% to 2.5% compared to ray-tracing through co-planar layers. Imagery computed employing the method illustrates the effect of directional resolution. The method is supposed to foster research in the field of daylighting, as well as applications in planning and design.

show abstract

Solar control: A general method for modelling of solar gains through complex facades in building simulation programs

Cited by 43 publications

References 8 publications

An hourly based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems

An hourly based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems

Evaluation of electrochromic windows impact in the energy performance of buildings in Mediterranean climates

Computational Combination of the Optical Properties of Fenestration Layers at High Directional Resolution

Contact Info

Product

Resources

About