New design for solar chimney with integrated windcatcher for space cooling and ventilation

Moosavi, Leila; Zandi, Majid; Bidi, Mokhtar; Behroozizade, Ehsan; Kazemi, Iman

doi:10.1016/j.buildenv.2020.106785

Cited by 71 publications

(16 citation statements)

References 41 publications

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“…It can also be seen from Table 1 that the combined system significantly improves temperature regulation and ventilation rate. 50% with a windcatcher and EAHE [64]; 75-90% with windcatcher [84] Increases 17% with Trombe wall and water spraying system [85]; increases 28-45% [77] An increasing number of studies tend to combine multiple energy-saving systems with SCs with vertical or inclined thermosiphon air channels as an effective passive ventilation enhancement strategy. The strengths of solar chimneys come from providing the desired airflow rate economically, with a simple structure, less space requirement, and ease of integration into existing building facades.…”

Section: Discussionmentioning

confidence: 99%

Solar Chimney Applications in Buildings

2021

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A solar chimney is a renewable energy system used to enhance the natural ventilation in a building based on solar and wind energy. It is one of the most representative solar-assisted passive ventilation systems attached to the building envelope. It performs exceptionally in enhancing natural ventilation and improving thermal comfort under certain climate conditions. The ventilation enhancement of solar chimneys has been widely studied numerically and experimentally. The assessment of solar chimney systems based on buoyancy ventilation relies heavily on the natural environment, experimental environment, and performance prediction methods, bringing great difficulties to quantitative analysis and parameterization research. With the increase in volume and complexity of modern building structures, current studies of solar chimneys have not yet obtained a unified design strategy and corresponding guidance. Meanwhile, combining a solar chimney with other passive ventilation systems has attracted much attention. The solar chimney-based integrated passive-assisted ventilation systems prolong the service life of an independent system and strengthen the ventilation ability for indoor cooling and heating. However, the progress is still slow regarding expanded applications and related research of solar chimneys in large volume and multi-layer buildings, and contradictory conclusions appear due to the inherent complexity of the system.

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Section: Discussionmentioning

confidence: 99%

Solar Chimney Applications in Buildings

2021

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“…Moosavi et al 32 have studied the integration of wind‐catcher, solar chimney, and water spray systems in small scale experimental investigation. They found that the new system works even with the absence of wind and to reduce internal prototype temperature up to 5.2°C and to generate 9 ACH.…”

Section: Related Studiesmentioning

confidence: 99%

New passive thermal comfort system using three renewable energies: Wind catcher, solar chimney and earth to air heat exchanger integrated to real‐scale test room in arid region (Experimental study)

et al. 2020

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Summary Thermal comfort is one of the ancient‐new challenges of the arid region population and responsible for more than 40% of energy end‐use. Renewable energy can be a solution to this problem. In the present paper, the potential of renewable energies to ameliorate thermal comfort and reducing energy consumption in building sectors is experimentally investigated. Three renewable‐based applications are used: wind‐catcher (WC), solar chimney (SC), and earth to air heat exchanger (EAHE). The three techniques are connected to a real‐scale test room and investigated using in‐situ measurement. The contribution of each technique is discussed separately. Temperature, humidity sensors, and anemometer are used to study parameters affecting thermal comfort. Obtained results show that the use of wind‐catcher could provide in the presence of wind an internal airflow of 3.8 m.s−1 which reduces inside room temperature by 6°C. A solar chimney creates a difference between its inlet and outlet air temperature by 5.9°C and increases the kinetic energy of hot air leaving the solar chimney which is replaced by cool air from outside and other devices outlet (EAHE and WC) and increases internal airflow even with the absence of winds. The earth to air heat exchanger increases the outlet air temperature in winter by 8°C and reduces it by 12°C in summer. Inside test room hygrometry is also ameliorated by the use of EAHE. Analyzing the new system (test room + WC + SC + EAHE) shows an important amelioration of inside thermal comfort. A difference between inside and outside test room temperature is found: reduction of 13°C in summer, and a gain of 10°C in winter. The new system leads to better inside test room thermal comfort conditions and to reduce energy consumption by almost 50%. The present study presents the first experimental investigation of using three renewable energies in the same building to improve thermal comfort. Using real scale room and in‐situ measurement gives a realistic idea and results show that green energy could improve the thermal situation and energy saving. This is an original work to motivate building designers, especially in the arid region to use more than one renewable energy to ameliorate thermal comfort in both summer and winter seasons.

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“…The sunlight can be converted into directly for thermal objectives, e.g. in solar chimney [8,9], air heating [10,11], solar dryers [12,13], solar water heaters [14][15][16]. Another interesting applications of the solar heat is solar desalination, which is studied in this study.…”

Section: Introductionmentioning

confidence: 99%

Effect of Steps Height and Glass Cover Angle on Heat Transfer Performance for Solar Distillation: Numerical Study

2022

IJE

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New design for solar chimney with integrated windcatcher for space cooling and ventilation

Cited by 71 publications

References 41 publications

Solar Chimney Applications in Buildings

Solar Chimney Applications in Buildings

New passive thermal comfort system using three renewable energies: Wind catcher, solar chimney and earth to air heat exchanger integrated to real‐scale test room in arid region (Experimental study)

Effect of Steps Height and Glass Cover Angle on Heat Transfer Performance for Solar Distillation: Numerical Study

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