Experimental and numerical studies to assess the energy performance of naturally ventilated PV façade systems

Shahrestani, Mehdi; Yao, Runming; Essah, Emmanuel; Shao, Li; Oliveira, Armando C.; Hepbaşlı, Arif; Bıyık, Emrah; Caño, Teodosio del; Rico, Elena María Gómez; Lechón, Juan Luis

doi:10.1016/j.solener.2017.02.034

Cited by 62 publications

(13 citation statements)

References 17 publications

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“…To check validity of the model, air temperatures predicted inside the façade when closed and acting as further insulation are compared to the measurements available under this operating mode. Figure 6 illustrates the difference between the predicted value through the model and the average measured one for a sample period (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). It can be seen that the model misestimates the temperature inside the façade during the periods of high irradiance.…”

Section: Predicted Temperatures Inside the Façadementioning

confidence: 99%

“…Many factors influence the energy performance of BIPV façades, as studied by Shahrestani et al [10] in a southeast facing façade. Also Gaillard et al [11,12] and Saadon et al [13] studied the performance of a PV envelope prototype in an office building in France.…”

Section: Introductionmentioning

confidence: 99%

“…Review work developed by Biyik et al [9] showed that software like TRNSYS and EnergyPlus were among the most commonly used. Shahrestani et al [10] developed and experimentally validated a model in TRNSYS that demonstrated the improvement in the efficiency of the system by ventilation. Andelkovic et al [27] created a model in EnergyPlus combined with an air network algorithm.…”

Section: Introductionmentioning

confidence: 99%

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Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

et al. 2019

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Ventilated façades are among the existing measures to reduce the energy demand in buildings. The combination of this passive heating and cooling strategy with photovoltaics (PV) can drive new buildings towards the current European targets near or even to net zero energy Buildings (nZEB). The present work studies the thermal behavior of the PV integrated ventilated façade applied in the nZEB known as “LUCIA” (acronym in Spanish for “University Centre to Launch Applied Research”) at the University of Valladolid, Spain. The aim is to evaluate the interest of recirculating indoor air within the façade during winter, as an alternative to the present preferred operating mode during the target season, in which the façade acts as further insulation. First, the radiant properties of the PV façade are measured to use the values in a mathematical model that describes the behavior of the ventilated façade in its current operating mode in winter. Then, the solar radiation available, the air-dry bulb temperatures indoors, outdoors and inside the ventilated façade are monitored to obtain experimental data to validate the model. The results show that air recirculation can entail favorable heat gains during 10% of winter, being this alternative preferable to the present operating mode when outdoor temperatures are over 18.4 °C.

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Section: Predicted Temperatures Inside the Façadementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

et al. 2019

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“…Although the moment when the first building-integrated photovoltaics (BIPV) system was installed in Germany [1] passed more than a quarter of a century ago, investors and researchers are interested in different types of PV façades that could be put to use in modern low-energy or even net zero-energy buildings. Shahrestani et al [2] found that ventilation in the air cavity of the PV façade system could significantly improve the energy performance of the system, even in a southeast facing façade. The results of research on Building Integrated Photovoltaics (BIPV) systems were shown in [3,4].…”

Section: Introductionmentioning

confidence: 99%

Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

Tejero‐González

Krawczyk

Martı́nez

et al. 2019

Innovations-Sustainability-Modernity-Openness Conference (ISMO’19)

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Ventilated façades are among the existing measures to reduce the energy demand in buildings. The combination of this passive heating and cooling strategy with photovoltaics (PV) can drive new buildings towards the current European targets for near or even net zero-energy buildings (nZEB). The present work aims at studying the PV integrated ventilated façade of the nZEB known as “LUCIA” at the University of Valladolid, Spain. First, the transmissivity of the PV façade is measured. Then, the monitoring of the available solar radiation is presented together with the air-dry bulb temperatures indoors, outdoors and inside the ventilated façade. The experimental results permit the validation of a mathematical model that describes the behaviour of the ventilated façade in its current operating modes. The results show that dampers should be closed during winter to let the façade act as a further insulation for outdoor temperatures below 18.4 C to improve energy efficiency. Indoor air recirculation would be helpful during 10% of the winter period.

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“…According to [7] shows the influence of natural ventilation in PV facade systems. There was developed a numerical model in TRNSYS and verified by a series of data collected through a long term.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Photovoltaics System Improvements in Urban Area

Żołądek

Sornek

Papis-Frączek

et al. 2018

Civil and Environmental Engineering Reports

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Nowadays, photovoltaic systems installed in urban areas have to be an essential part of distributed generation systems, and lead to improve energy efficiency of buildings. The paper describes the operation aspects of the 7,5 kWp photovoltaic installation located on the roof of the didactic building of AGH University of Science and Technology. The significant part of the roof Is occupied by HVAC installation, so the periodic shading is occurring. It makes, that a level of energy generated in the PV system is lower than expected. The first part of the test was focused on the validating model of the installation and determine its impact on the CO2 emissions. Then, modifications in the arrangement of the panels were considered (redirecting of additional light stream). Moreover, an economic and environmental analysis of proposed improvements were conducted.

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Experimental and numerical studies to assess the energy performance of naturally ventilated PV façade systems

Cited by 62 publications

References 17 publications

Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

Improved Performance of a PV Integrated Ventilated Façade at an Existing nZEB

Experimental and Numerical Analysis of Photovoltaics System Improvements in Urban Area

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