Solar heat gain coefficient measurement of semi-transparent photovoltaic modules with indoor calorimetric hot box and solar simulator

Chen, Fangzhi; Wittkopf, Stephen; Ng, Poh Khai; Du, Hui

doi:10.1016/j.enbuild.2012.06.005

Cited by 93 publications

(34 citation statements)

References 10 publications

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“…Marinoski et al, devised a calorimeter for solar heat gain calculation of fenestrations [11], and Platzer analyzed the testing procedure with the comparison between calorimetric measurements and modeling [12]. Chen et al, presented not only a calorimetric box complying with international standards, but also how to measure SHGC of semi-transparent photovoltaic modules with the calorimetric box [13,14]. Research regarding SHGC performance analysis can be broadly divided into real model tests and simulation evaluations.…”

Section: Literature Review On Shgc Studiesmentioning

confidence: 99%

“…Apart from the method of calculating SHGC, until very recently, there had been no international standards concerning the criteria for experiments, as mentioned above. As a result, a variety of standards and research exist with regard to the devices and experimental conditions of real model tests [11][12][13][14]. Marinoski et al, devised a calorimeter for solar heat gain calculation of fenestrations [11], and Platzer analyzed the testing procedure with the comparison between calorimetric measurements and modeling [12].…”

Section: Literature Review On Shgc Studiesmentioning

confidence: 99%

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Solar Heat Gain Coefficient Analysis of a Slim-Type Double Skin Window System: Using an Experimental and a Simulation Method

Cho

2018

Energies

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Double skin facade systems are known to be capable of preventing overheating in curtain wall buildings to a certain degree. The system induces the efficient blocking of sunlight using a center blind during the summer season. Moreover, it enables overheated air in the cavity layer to be sent outdoors, resulting in a reduction of the use of energy for cooling. However, double skin facade systems can be problematic, in that they must be opened according to seasonal conditions to achieve greater energy consumption efficiencies. In current double skin facade systems, the width of the cavity layer was too wide for residents to easily operate the system. When considering this, research on an easy-to-open 270 mm slim-type double skin window (SDSW) was undertaken in order to confirm its energy efficient performance. First, official testing based on the KS L 9107 Standard was undertaken to analyze solar heat gain coefficients (SHGC) and the cavity air temperatures, according to the open and close conditions of the SDSW's external windows, enabling an analysis of the effect that the opening of windows had on reducing cooling energy needs. Next, SHGCs and cavity air temperatures were studied according to the different opening conditions of the SDSW's external window to analyze the most optimal effects on cooling energy reductions by Computational Fluid Dynamics (CFD).

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Section: Literature Review On Shgc Studiesmentioning

confidence: 99%

Section: Literature Review On Shgc Studiesmentioning

confidence: 99%

Solar Heat Gain Coefficient Analysis of a Slim-Type Double Skin Window System: Using an Experimental and a Simulation Method

Cho

2018

Energies

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“…Such systems, based on the assessment of the heat flow through the sample in a controlled measuring chamber, are in general complex, expensive, bulky and permanent. In addition, few studies have addressed the potential influence of the different electrical operating conditions that a STPV element may experience (open circuit, short circuit or maximum power production) on its g-value [24,25].…”

Section: Introductionmentioning

confidence: 99%

G-value indoor characterization of semi-transparent photovoltaic elements for building integration: New equipment and methodology

Olivieri

Frontini

Lopez

et al. 2015

Energy and Buildings

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Whereas the modern architecture trends to an extensive use of glazing elements, buildings are increasingly required to minimize the external energy demand, cutting down the energy needed and covering the residual demand using local energy generation solutions. In this context, the integration of optimized SemiTransparent Photovoltaic (STPV) elements seems to present a promising energy saving potential, leading to significant reductions of the heating, cooling and lighting loads while the on-site electricity generation is supplied. In mild climate areas, building glazings are required to perform as solar control systems with a low solar factor in order to avoid overheating. However, g-value is frequently unavailable in the data sheet of the STPV elements, making it difficult to design the optimal building solution. In the present work, an indoor testing facility to analyze the solar factor of STPV elements has been further developed and validated. The operating principles of the calorimetric system as well as the experimental data obtained in the validation stage are presented. Results show that the system accuracy and sensitivity are fully adequate to perform detailed analyses of the solar factor of STPV glazings. Furthermore, g-value variations with the transparency degree have been analyzed over different electrical operating points.

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“…Various types of glass (such as clear, green, blue and bronze) were used as back sheet of the PV laminate mounted in the insulated glazing, finding that the rear glass hardly affects the PV module temperature and consequently its electrical performance. Chen et al [28 ] used an indoor setup (calorimeter and solar simulator) to determine the SHGC of five STPV glazing elements. The sensitivity analysis concluded that with an increasing angle of incident solar radiation, the SHGC and power generation are reduced significantly (up to 20%) whereas the electrical operation conditions reduce the SHGC by only 3-6%, proportionally to the electrical power output of the element.…”

Section: Introductionmentioning

confidence: 99%

Energy saving potential of semi-transparent photovoltaic elements for building integration

Olivieri

Caamaño‐Martín

Moralejo-Vázquez

et al. 2014

Energy

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Within the building energy saving strategies, BIPV (building integrated photovoltaic systems) present a promising potential based on the close relationship existing between these multifunctional systems and the overall building energy balance. Building integration of STPV (semi-transparent photovoltaic) elements affects deeply the building energy demand since it influences the heating, cooling and lighting loads as well as the local electricity generation. This work analyses over different window-to-wall ratios the overall energy performance of five STPV elements, each element having a specific degree of transparency, in order to assess the energy saving potential compared to a conventional solar control glass compliant with the local technical standard. The prior optical characterization, focused to measure the spectral properties of the elements, was experimentally undertaken. The obtained data were used to perform simulations based on a reference office building using a package of specific software tools (DesignBuilder, EnergyPlus, PVsyst, and COMFEN) to take proper account of the STPV peculiarities. To evaluate the global energy performance of the STPV elements a new Energy Balance Index was formulated. The results show that for intermediate and large facade openings the energy saving potential provided by the STPV solutions ranges between 18% and 59% compared to the reference glass.

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Solar heat gain coefficient measurement of semi-transparent photovoltaic modules with indoor calorimetric hot box and solar simulator

Cited by 93 publications

References 10 publications

Solar Heat Gain Coefficient Analysis of a Slim-Type Double Skin Window System: Using an Experimental and a Simulation Method

Solar Heat Gain Coefficient Analysis of a Slim-Type Double Skin Window System: Using an Experimental and a Simulation Method

G-value indoor characterization of semi-transparent photovoltaic elements for building integration: New equipment and methodology

Energy saving potential of semi-transparent photovoltaic elements for building integration

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