Experimental study of the prediction of the ventilation flow rate through solar chimney with large gap-to-height ratios

Jing, Haiwei; Chen, Dong; Li, Angui

doi:10.1016/j.buildenv.2015.02.018

Cited by 87 publications

(42 citation statements)

References 22 publications

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“…The solar chimneys flow model of Chen et al [10,11] is adopted. The model assumes unidirectional upward flow of a vertical chimney with small gap-to-height ratio (less than 0.2).…”

Section: Flow Modelmentioning

confidence: 99%

Passive Cooling of Glazing Surfaces Using Solar Chimneys

Touma¹,

Ghali²,

Ghaddar³

2024

RE&PQJ

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The aim of this project is to reduce the cooling loads in spaces by decreasing the window temperature and solar radiation entrance through the use of a passive evaporative cooler combined with a solar chimney and with no additional energy consumption. The cooler provides heat and mass exchange that render the air capable of cooling the space in front of the window. On the other hand, the solar chimney works based on principles of buoyancydriven natural flows. Mathematical models of the evaporative cooler, glazing section, solar chimney are developed and integrated with a space model in an algorithm where the entire system is tested under different outdoor temperature and solar radiation conditions. As the outer glass temperature typically represents the temperature of the window without the installation of this system, reductions of 8% to 12% in the window temperatures were seen for an outdoor temperature of 30 o C and a solar radiation of 300Wm 2 and for small chimney sizes.

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“…The solar chimneys flow model of Chen et al [10,11] is adopted. The model assumes unidirectional upward flow of a vertical chimney with small gap-to-height ratio (less than 0.2).…”

Section: Flow Modelmentioning

confidence: 99%

Passive Cooling of Glazing Surfaces Using Solar Chimneys

Touma¹,

Ghali²,

Ghaddar³

2024

RE&PQJ

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“…Their achievements also demonstrate that flow inversion occurs in the solar chimney with a gap width-to-height ratio bigger than 0.3. Jing et al [195] constructed a solar chimney with the large gap-to-height ratio from 0.2 to 0.6 on a single wall and evaluated its performance in various chimney gaps and heat fluxes. It is observed that when all the conditions except chimney gap are fixed, by increasing the chimney gap, the maximum airflow rate is reached at the chimney gap of around 1000 mm, which is the optimum chimney gap in the variety of the chimney gaps considered in this work.…”

Section: Hybrid Solar Chimney Systems and Special Applicationsmentioning

confidence: 99%

A review on solar chimney systems

Kasaeian

Molana

Rahmani

et al. 2017

Renewable and Sustainable Energy Reviews

150

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The increased utilization of solar energy has gained the attention of researchers to develop the solar chimney (SC) technology in recent years. Many studies have been conducted in this aear both experimentally and theoretically, whereas experimental studies are mainly focused on small-scale systems. This work provides a comprehensive and updated review that include most of the experimental studies, analytical and simulation works, the solar chimney applications, hybrid systems and geographical case studies based on extended references, citation of the updated works and the specified way of looking at different sections. The technological gaps in differnet sections are identified and a summary of suggestions is given for the future work, including more experimental works on the large-scale systems, and CFD analyses for optimization between the geometrical parameters and the output power. More studies on new applications of solar chimney technology including hybrid systems are also recommended.

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“…Generally, natural ventilation can be categorized based on two mechanisms: (i) buoyancy-driven ventilation by the vertical and horizontal temperature difference; and (ii) wind-driven ventilation by the pressure difference between the front and the back of the building (refer to Table 3) [29][30][31][32][33][34][35][36][37][38]. First, there are various previous studies related to buoyancy-driven ventilation [29][30][31][32][33][34]. Li and Liu (2014) focused on the thermal performance of phase-change-material (PCM)-based solar chimney within laboratory conditions with three different heat fluxes (500, 600, and 700 W/m 2 ).…”

Section: Part A-1: Passive Sustainable Designmentioning

confidence: 99%

Advanced Strategies for Net-Zero Energy Building: Focused on the Early Phase and Usage Phase of a Building’s Life Cycle

Hong

Kim

et al. 2017

Sustainability

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Abstract:To cope with 'Post-2020', each country set its national greenhouse gas (GHG) emissions reduction target (e.g., South Korea: 37%) below its business-as-usual level by 2030. Toward this end, it is necessary to implement the net-zero energy building (nZEB) in the building sector, which accounts for more than 25% of the national GHG emissions and has a great potential to reduce GHG emissions. In this context, this study conducted a state-of-the-art review of nZEB implementation strategies in terms of passive strategies (i.e., passive sustainable design and energy-saving technique) and active strategies (i.e., renewable energy (RE) and back-up system for RE). Additionally, this study proposed the following advanced strategies for nZEB implementation according to a building's life cycle: (i) integration and optimization of the passive and active strategies in the early phase of a building's life cycle; (ii) real-time monitoring of the energy performance during the usage phase of a building's life cycle. It is expected that this study can help researchers, practitioners, and policymakers understand the overall implementation strategies for realizing nZEB.

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Experimental study of the prediction of the ventilation flow rate through solar chimney with large gap-to-height ratios

Cited by 87 publications

References 22 publications

Passive Cooling of Glazing Surfaces Using Solar Chimneys

Passive Cooling of Glazing Surfaces Using Solar Chimneys

A review on solar chimney systems

Advanced Strategies for Net-Zero Energy Building: Focused on the Early Phase and Usage Phase of a Building’s Life Cycle

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