The multi-azimuthal window as a passive solar system: A study of heat gain for the rational use of energy

Barea, Gustavo; Ganem, Carolina; Esteves, Alfredo

doi:10.1016/j.enbuild.2017.03.059

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…(4) Air in each zone is well-mixed. (5) Mean air flow rate between the heat collecting space and the heat transfer space is identical with that between the heat transfer space and the indoor space.…”

Section: Assumptionsmentioning

confidence: 99%

“…The mean air flow rate between the heat collecting space and the heat transfer space (or between the heat transfer space and the indoor space) m(τ) is obtained by Bernoulli's equation [33], as given in Equation (5).…”

Section: Heat Transfer Of Hhcfmentioning

confidence: 99%

“…Passive solar building is a type of low-energy buildings exploiting solar energy to create a relatively comfortable environment in buildings [1,2]. Thermal energy collection and storage in building envelops may be enhanced by integrating some passive solar measures [3][4][5][6][7]. It was reported by measurements that passive solar buildings can save more than 25% of total primary energy consumption than the same buildings without passive solar measures [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Thermal Performance of a Hybrid Heat Collecting Facade Used for Passive Solar Buildings in Cold Region

Wang

Lei

et al. 2019

Energies

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Passive solar technologies are traditionally considered as cost-effective ways for the building heating. However, conventional passive solar buildings are insufficient to create a relatively stable and comfortable indoor thermal environment. To further increase the indoor air temperature and reduce the heating energy consumption, a hybrid heat collecting facade (HHCF) is proposed in this paper. To analyze the thermal performance of the HHCF, a heat transfer model based on the heat balance method is established and validated by experimental results. Meanwhile, the energy saving potential of a room with the HHCF is evaluated as well. When the HHCF is applied to places where heating is required in the cold season while refrigeration is unnecessary in hot season, the HHCF can reduce the heating need by 40.2% and 21.5% compared with the conventional direct solar heat gain window and the Trombe wall, respectively. Furthermore, a series of parametric analyses are performed to investigate the thermal performance of the room with HHCF under various design and operating conditions. It is found that the thermal performance of the HHCF mainly depends on the window operational schedule, the width and the absorptivity of heat collecting wall, and the thermal performance of the inner double-glass window. The modeling and the parametric study in this paper are beneficial to the design and the optimization of the HHCF in passive solar buildings.

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Section: Assumptionsmentioning

confidence: 99%

Section: Heat Transfer Of Hhcfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the Thermal Performance of a Hybrid Heat Collecting Facade Used for Passive Solar Buildings in Cold Region

Wang

Lei

et al. 2019

Energies

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“…Other studies investigated the energy efficiency of operable louvres (Scheuring & Weller, 2020) and triple-glazed fluidic windows (Su et al, 2021). In thermal performance studies, experiments were performed on multi-azimuthal windows (Barea et al, 2017). Two studies involved investigations of metacage windows (Fusaro et al, 2020) and acoustic metawindow frames (Fusaro et al, 2021) for simultaneous noise reduction and natural ventilation.…”

Section: Window Typementioning

confidence: 99%

Review of Window Performance in A Hot and Humid Climate

Wellun¹,

Yusoff²,

Mohamed³

et al. 2022

JST

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Incorrect implementation of window parameters, such as configuration, position, and size, cause an unpleasant indoor environment. The authors reviewed window performance in a hot and humid climate in this paper. Articles were screened in detail to determine eligibility, compiled, and organised according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) requirements. The articles included in this review concerned natural ventilation and window performance in a hot and humid climate. Keywords or topics were reviewed and focused on indoor environment comfort. The results demonstrated that sliding windows were unfavourable openings that were nevertheless in demand. This review was performed to guide consumers, designers, and the market of the built environment industry.

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“…A large number of studies have been performed on the performance improvements of this technology. Barea et al [ 4 ] investigated and calculated the thermal performance of a specific orientation of multiazimuthal windows. They concluded that multiazimuthal windows with an angle of 45° in the side panels reach a multiazimuthal/flat solar gain factor (M/FSGF) daily average value of 1.20, which means 20% more solar gain than the daily average solar gain of a flat window.…”

Section: Introductionmentioning

confidence: 99%

Energy Analysis of a Complementary Heating System Combining Solar Energy and Coal for a Rural Residential Building in Northwest China

Zhen

Osman

et al. 2018

BioMed Research International

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In order to utilize solar energy to meet the heating demands of a rural residential building during the winter in the northwestern region of China, a hybrid heating system combining solar energy and coal was built. Multiple experiments to monitor its performance were conducted during the winter in 2014 and 2015. In this paper, we analyze the efficiency of the energy utilization of the system and describe a prototype model to determine the thermal efficiency of the coal stove in use. Multiple linear regression was adopted to present the dual function of multiple factors on the daily heat-collecting capacity of the solar water heater; the heat-loss coefficient of the storage tank was detected as well. The prototype model shows that the average thermal efficiency of the stove is 38%, which means that the energy input for the building is divided between the coal and solar energy, 39.5% and 60.5% energy, respectively. Additionally, the allocation of the radiation of solar energy projecting into the collecting area of the solar water heater was obtained which showed 49% loss with optics and 23% with the dissipation of heat, with only 28% being utilized effectively.

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The multi-azimuthal window as a passive solar system: A study of heat gain for the rational use of energy

Cited by 10 publications

References 6 publications

Study on the Thermal Performance of a Hybrid Heat Collecting Facade Used for Passive Solar Buildings in Cold Region

Study on the Thermal Performance of a Hybrid Heat Collecting Facade Used for Passive Solar Buildings in Cold Region

Review of Window Performance in A Hot and Humid Climate

Energy Analysis of a Complementary Heating System Combining Solar Energy and Coal for a Rural Residential Building in Northwest China

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