Assessing the thermal performance of a rooftop solar chimney attached to a single room

Jiménez-Xamán, C.; Xamán, J.; Gijón-Rivera, M.; Zavala-Guillén, I.; Noh-Pat, F.; Sima, Elena

doi:10.1016/j.jobe.2020.101380

Cited by 29 publications

(10 citation statements)

References 39 publications

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“…The Moosavi et al study [41] proposed that wind collectors and water spray systems, combined with solar chimneys, could reduce solar photovoltaic panel temperatures by 5.2°C during peak summer months. In the Jimenez-Xaman et al's study [42], they designed a solar chimney that improved summer and winter ventilation rates by 8-45% and 1.16-24.89%, respectively. From an economic lens, Sivaram et al [43] indicated that as 30% of photovoltaic firms are government-owned, the cost of solar panels using solar chimneys could decrease by 18%.…”

Section: Solar Chimneymentioning

confidence: 99%

Research on the Passive Cooling System of Solar Photovoltaic Panel Based on Hybrid Solar Chimney and Ventilator

Zhang,

Misaran,

Adzrie

et al. 2023

J. Phys.: Conf. Ser.

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The efficiency of solar photovoltaic (PV) power generation is significantly impacted by factors such as ambient temperature, surrounding wind speed, and the temperature of the solar PV panels. The power generation efficiency of these panels diminishes by approximately 0.5% for each incremental rise in their temperature. To mitigate this effect, two primary methods for cooling solar photovoltaic panels are considered: active and passive cooling techniques. This review paper delves into an extensive body of literature on solar passive cooling systems, highlighting the vital role of passive cooling technology in enhancing the efficiency of solar PV power generation. We investigate the structure and cooling effect of diverse passive cooling systems, with a specific focus on the application of solar chimneys and ventilators in cooling systems for solar PV panels. Our study reveals that solar chimneys, using buoyancy, can decrease the temperature of solar PV panels by as much as 15 degrees, thereby augmenting power generation efficiency. Furthermore, the deployment of ventilator technology can boost the efficiency of solar PV power generation to an impressive 46.54%. In conclusion, this paper proposes the synergistic use of solar chimneys and ventilators to improve solar PV panel efficiency, extend their lifespan, and reduce the environmental impact resulting from inefficient solar PV panels. This comprehensive approach should inform future practices.

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Section: Solar Chimneymentioning

confidence: 99%

Research on the Passive Cooling System of Solar Photovoltaic Panel Based on Hybrid Solar Chimney and Ventilator

Zhang,

Misaran,

Adzrie

et al. 2023

J. Phys.: Conf. Ser.

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“…The angle was found to range between 45°and 60°, which is dependent on both latitude and season. The impact of the season on the chimney performance was also studied by Jimenez-Xaman et al [50] who studied a rooftop SC attached to a single room considering both Summer and winter conditions in Merida, Mexico.…”

Section: History Of Previous Research On Buoyancy Driven Ventilationmentioning

confidence: 99%

Passive cooling techniques for ventilation: an updated review

Al-Shamkhee

Al-Aasam

Al‐Waeli

et al. 2022

Renew. Energy Environ. Sustain.

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The consumption of energy for cooling is an important issue, especially in subtropical climates where there are high temperatures and dry weather in the summer; this climate forces homeowners to use mechanical-electric cooling and ventilation. The main advantage of passive cooling is to minimize energy demands which are required to achieve thermal comfort in buildings, especially with climates exhibiting high ambient temperatures. This paper presents a detailed literature review and concept breakdown for passive cooling and ventilation in building by offering the fundamental principles of the techniques of passive cooling and ventilation. Moreover, the status of passive cooling developments along with state-of-the-art research is critically reviewed in this paper. Furthermore, the article focuses on Buoyancy air-driven ventilation. Solar control techniques are explained and classified along with techniques for heat modification and dissipation. This paper offers insight into the design considerations of different passive ventilation systems and presents recommendations for future work to achieve cost-efficient, comfortable living. Moreover, novel systems are reviewed and discussed to better understand the role of Phase Change Material (PCM) in passive cooling systems.

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“…The system in Equations ( 1)-( 4) governs the physical phenomenon of heat and mass transfer. Equations ( 1)-( 4) contain the diffusive and convective terms for fluid modeling, and are widely used in numerical studies [24,25]. The two transport equations of the k-ε turbulence model used to close the problem are:…”

Section: Mathematical Modelmentioning

confidence: 99%

Numerical Study of the Double Diffusion Natural Convection inside a Closed Cavity with Heat and Pollutant Sources Placed near the Bottom Wall

et al. 2020

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A study was conducted on the double diffusion by natural convection because of the effects of heat and pollutant sources placed at one third of the closed cavity’s height. The heat and pollution sources were analyzed separately and simultaneously. The study was considered for the Rayleigh number interval 10 4 ≤ R a ≤ 10 10 . Three case studies were analyzed: (1) differentially heated closed cavity with only heat sources; (2) differentially heated closed cavity with only pollutant sources; and (3) differentially heated closed cavity with heat and pollutant sources. The governing equations of the system were solved through the finite volume technique. The turbulence solution was done with the k-ε model. The dominant influence of the buoyancy forces was found due to the pollutant diffusion on the flow pattern, and an internal temperature increase was observed with the simple diffusion. The most critical case was obtained through the double diffusive convection with an average temperature value of 32.57 °C. Finally, the Nusselt number increased as the Rayleigh number increased; however, the Sherwood number either increased or decreased when the Rayleigh number increased. The highest mean concentration recorded was 2808 ppm; this was found with the value R a = 10 6 .

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Assessing the thermal performance of a rooftop solar chimney attached to a single room

Cited by 29 publications

References 39 publications

Research on the Passive Cooling System of Solar Photovoltaic Panel Based on Hybrid Solar Chimney and Ventilator

Research on the Passive Cooling System of Solar Photovoltaic Panel Based on Hybrid Solar Chimney and Ventilator

Passive cooling techniques for ventilation: an updated review

Numerical Study of the Double Diffusion Natural Convection inside a Closed Cavity with Heat and Pollutant Sources Placed near the Bottom Wall

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