Impact of Multiple Parameters on Energy Performance of PV-DSF Buildings

Fazelpour, Farivar; Soltani, Nima; Markarian, Elin; Khezerloo, Hamed

doi:10.3390/proceedings2231487

Cited by 3 publications

(5 citation statements)

References 4 publications

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“…The building three‐dimensional model is also shown in Figure . As depicted in Figure , the findings of this study are in good agreement with that of the previous study …”

Section: Methodssupporting

confidence: 92%

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Techno‐economic feasibility of building attached photovoltaic systems for the various climatic conditions of Iran

Karimi

Fazelpour

Rosen

et al. 2019

Env Prog and Sustain Energy

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The integration of solar energy systems into buildings via photovoltaic (PV) and other technologies can curb the amount of greenhouse gas emissions produced by buildings. However, the performance of solar energy systems is highly dependent on climatic and economic conditions. In this regard, the techno‐economic feasibility of building attached PV systems are studied for three scenarios considering three cities of Iran namely Tehran, Tabriz, and Kish Island, which have different climatic conditions. The result shows that the PV systems can annually meet 4.5–20% of the electricity needs for Tehran, 3.0–13% for Tabriz and 2.0–11.5% for Kish Island. Moreover, roof mounted PV systems were found to be a better alternative to envelope attached systems in technical and economic terms. The payback period for the solar energy systems was found to be between 8.7 and 14.3 years for Tehran, 14.2 and 22.6 years for Tabriz, and 11.6 and 21.1 for Kish Island.

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“…The building three‐dimensional model is also shown in Figure . As depicted in Figure , the findings of this study are in good agreement with that of the previous study …”

Section: Methodssupporting

confidence: 92%

“…To assess the validity of results, a simple three‐story office building as presented in a selected article is simulated in DesignBuilder. BIPV windows are used in the building and the properties of PV are summarized in Table .…”

Section: Methodsmentioning

confidence: 99%

Techno‐economic feasibility of building attached photovoltaic systems for the various climatic conditions of Iran

Karimi

Fazelpour

Rosen

et al. 2019

Env Prog and Sustain Energy

Self Cite

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“…The thermal and energy performance of DSF buildings are influenced by some parameters such as building orientation, glazing type, cavity width, and climatic conditions, as well as by the use of photovoltaic cells, phase change materials or venetian blinds, and by air ventilation mode option [13][14][15][16][17][18]. Proper DSF integration with PCM leads to up to 10.38% of building energy savings [13].…”

Section: Introductionmentioning

confidence: 99%

“…Proper DSF integration with PCM leads to up to 10.38% of building energy savings [13]. In the work of Fazelpour et al [14], it was found that with the increase in cavity width from 0.4 to 1.2 m, the annual electricity consumption is reduced by 5.88, 5.19, and 7.49 MWh for Tehran, Tabriz, and Kish, respectively. When the slat angle is adjusted from 0 • to 90 • the temperature of the inner glazing reduces 1 • C at least [16].…”

Section: Introductionmentioning

confidence: 99%

Development of a Double Skin Facade System Applied in a Virtual Occupied Chamber

et al. 2021

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In this study a system constituted by seven double skin facades (DSF), three equipped with venetian blinds and four not equipped with venetian blinds, applied in a virtual chamber, is developed. The project will be carried out in winter conditions, using a numerical model, in transient conditions, and based on energy and mass balance linear integral equations. The energy balance linear integral equations are used to calculate the air temperature inside the DSF and the virtual chamber, the temperature on the venetian blind, the temperature on the inner and outer glass, and the temperature distribution in the surrounding structure of the DSF and virtual chamber. These equations consider the convection, conduction, and radiation phenomena. The heat transfer by convection is calculated by natural, forced, and mixed convection, with dimensionless coefficients. In the radiative exchanges, the incident solar radiation, the absorbed solar radiation, and the transmitted solar radiation are considered. The mass balance linear integral equations are used to calculate the water mass concentration and the contaminants mass concentration. These equations consider the convection and the diffusion phenomena. In this numerical work seven cases studies and three occupation levels are simulated. In each case the influence of the ventilation airflow and the occupation level is analyzed. The total number of thermal and indoor air quality uncomfortable hours are used to evaluate the DSF performance. In accordance with the obtained results, in general, the indoor air quality is acceptable; however, when the number of occupants in the virtual chamber increases, the Predicted Mean Vote index value increases. When the airflow rate increases the total of Uncomfortable Hours decreases and, after a certain value of the airflow rate, it increases. The airflow rate associated with the minimum value of total Uncomfortable Hours increases when the number of occupants increases. The energy production decreases when the airflow increases and the production of energy is higher in DSF with venetian blinds system than in DSF without venetian blinds system.

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“…The DSF thermal and energy performance are induced by building orientation, glazing type, cavity width and climatic conditions; by the application of photovoltaic cells, phase change materials or Venetian-type blinds; and by the option of an air ventilation strategy [13][14][15][16][17][18]. The application of adequate control strategies for DSFs with internal incorporated blinds can contribute to diminish the building energy consumption and thermal loads, as shown in the work of Kim et al [19].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter

et al. 2021

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This paper presents a comparative study of a clean technology based on a DSF (double skin facade) used in winter conditions in the occupied buildings comfort improvement, namely the thermal comfort and air quality. The performance of a solar DSF system, the building’s thermal response, the internal thermal comfort and the internal air quality are evaluated. In this study, a DSF system, an air transport system and a HVAC (heating, ventilating and air conditioning) system based on mixing ventilation are used. The study considers a virtual chamber occupied by eight persons and equipped, in the outside environment, by three DSFs. A new horary pre-programming control methodology is developed and applied when the airflow rate is constant and the number of DSFs to operate is variable, when the airflow rate is variable and the number of DSFs to operate is constant and when the airflow rate is variable and the number of DSFs to operate is variable. This work uses a numerical model that simulates the integral building thermal behavior and an integral human thermal response. The internal air, provided by a mixing ventilating system, is warmed using the DSF system. The air temperature inside the DSF system and the virtual chamber, the thermal comfort level using the PMV index, the internal air quality using the carbon dioxide concentration and the uncomfortable hours are calculated for winter conditions. The results obtained show that the energy produced in the DSF, using solar radiation, guarantees acceptable thermal comfort conditions in the morning and in the afternoon. The indoor air quality obtained at the breathing level is acceptable. It is found that the airflow rate to be used is more decisive than the DSF operating methodology. However, when a solution is chosen that combines a ventilation rate with the number of DSF to operate, both variables throughout the day can obtain simultaneously better results for indoor air quality and thermal comfort according to the standards.

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Impact of Multiple Parameters on Energy Performance of PV-DSF Buildings

Cited by 3 publications

References 4 publications

Techno‐economic feasibility of building attached photovoltaic systems for the various climatic conditions of Iran

Techno‐economic feasibility of building attached photovoltaic systems for the various climatic conditions of Iran

Development of a Double Skin Facade System Applied in a Virtual Occupied Chamber

Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter

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