نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه عمران و معماری، دانشکده فنی و مهندسی، دانشگاه تربت حیدریه، تربت حیدریه، ایران.

2 استاد، معماری، معماری، پلی تکنیک، آتن، یونان.

10.22061/jsaud.2026.11631.2291

چکیده

اقلیم گرم و خشک با گرمای شدید بخصوص در تابستان و بارندگی بسیار کم در تمام طول سال و در نتیجه خشکی هوا شناخته می شود. قبل از اختراع سیستمهای مکانیکی جدید، از عناصر اصلی که در معماری سنتی برای سرمایش و تهویه مورد استفاده قرار می‌گرفت بادگیر بود. سیستم عملکرد بادگیرها براساس دو نیروی باد و شناوری بوده است. مساله بادگیرهای مرسوم، نخست عملکرد بیشتر بادگیر به عنوان سیستمی تهویه و خروج هوای داخل بنا بوده و علاوه بر این سیستم در زمان‌ها و مناطق با سرعت باد پایین ناکارامد است. در پژوهش حاضر سعی شده با حداقل تغییر در سیستم بادگیر سنتی از نظر شاکله کلی و عملکردی، با افزودن یک صفحه جاذب خورشیدی، کارایی افزایش داده شود. با استفاده از روش عددی بر مبنای دینامیک سیال محاسباتی اثر سرعت باد ورودی به بادگیر و شدت تابش به صفحه جاذب بر سرعت جریان هوا در دریچه ورودی به اتاق و نحوه توزیع جریان هوا در فضای داخل اتاق، همچنین نرخ جریان هوا مورد مطالعه قرار گرفت. اعتبار سنجی مدل بصورت تجربی انجام شد. نتایج نشان داد که سرعت هوا در ورودی اتاق با افزایش شدت تابش بالا رفته که باعث گسترش منطقه گردش هوا در داخل اتاق می شود. همچنین این تاثیر در سرعت‌های پایین‌تر جریان باد ورودی بیشتر است. علاوه بر این نرخ جریان هوا در زمانی که سرعت وزش باد نزدیک صفر است و تابش خورشیدی به میزان 1000 وات بر مترمربع باشد به حدود 006/0 کیلوگرم بر ثانیه می‌رسد، که در سرعت‌های دیگر وزش باد نیز این تاثیر مثبت با نسبت کمتری قابل مشاهده است. می‌توان سیستم پیشنهادی را با افزایش چند برابری دبی جرمی هوا و افزایش حدود 3 برابری سرعت جریان هوا در دریچه ورودی به اتاق، در سرعت‌های پایین باد، در بهبود کارآیی بادگیر در زمان عدم وزش باد محیطی موثر دانست.

چکیده تصویری

ارتقاء عملکرد بادگیر سنتی بابهره گیری از صفحه جاذب انرژی خورشیدی

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Augmenting the Performance of the Traditional Wind Catcher Equipped with Solar Energy Absorber Plate

نویسندگان [English]

  • Azam Noroozi 1
  • Yannis Veneris 2

1 Assistant Prof., Department of Civil and Architecture, Faculty of Engineering, University of Torbat Heydarih, Torbat Heydarih, Iran.

2 Prof., Department of Architecture, National Technical Uni. of Athens, Athens, Greece.

چکیده [English]

Before the invention of modern mechanical systems, one of the essential building elements in the Hot-Dry climate which was used for cooling and natural ventilation is wind catcher. Wind catchers requires a driving force to operate, the traditional system is mostly applied for heat dissipation rather than supplying ambient cool air through the system, moreover, when there is not adequate external airflow, the stack effect is negligible. In this study, a wind catcher integrated with a solar chimney, also CFD simulations were accomplished to evaluate the effect of the influx of solar radiation amount on volume flow rate at the entrance of the room and air-flow pattern inside the room. Predicted air-flow pattern around and inside the designed wind catcher at the different wind speeds (0, 3 and 5 m/s), solar irradiance on the absorber plate of 0 and 1000 W/m2 shows air velocity at the inlet vent, where the air enters the room, and subsequently the zone of air circulation inside the room enhanced with the solar radiation that intensified the buoyancy force. Comparing the air flow pattern of the different wind speeds at the constant solar radiations indicated that increasing the wind speed from 0 to 5 m/s significantly increased the air velocity inside the wind catcher. Moreover, the air flow rate at the conditions of no wind flow with solar radiation of 1000 W/m2 was found to be around 0.006 kg/s and it is clear, that a maximum air flow rate of 0.1334 kg/s is achievable at the wind speed of 5 m/s, the solar irradiance of 1000 W/m2. The zone of air circulation inside the room improve with the solar radiation that intensified the buoyancy force and system has a better performance when the wind speed is zero.

کلیدواژه‌ها [English]

  • Solar chimney
  • Ventilation
  • Wind speed
  • Solar energy
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