پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 158 |
| تعداد شماره‌ها | 6,230 |
| تعداد مقالات | 67,765 |
| تعداد مشاهده مقاله | 115,200,207 |
| تعداد دریافت فایل اصل مقاله | 89,948,074 |
ظرفیت‌سنجی به‌کارگیری پوسته‌های دوجداره در طراحی معماری اقلیم گرم و خشک ایران به منظور کاهش مصرف انرژی (نمونه موردی شهر یزد) | ||
| نشریه هنرهای زیبا: معماری و شهرسازی | ||
| مقاله 3، دوره 19، شماره 3، آبان 1393، صفحه 29-38 اصل مقاله (2.34 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfaup.2014.55401 | ||
| نویسندگان | ||
| محمد هادیان‌پور1؛ محمدجواد مهدوی‌نژاد* 2؛ محمدرضا بمانیان3؛ محمد حق‌شناس1 | ||
| 1پژوهشگر دوره دکتری معماری، دانشگاه تربیت مدرس، تهران | ||
| 2دانشیار دانشکده هنر و معماری، دانشگاه تربیت مدرس، تهران | ||
| 3استاد دانشکده هنر و معماری، دانشگاه تربیت مدرس، تهران | ||
| چکیده | ||
| نماهای دو پوسته راهکاری مناسب برای به حداقل رساندن دفع گرما در زمستان و جذب گرما در تابستان هستند؛ اما مسئلة برافروختگی در حفرة بین دو پوسته در ماه‌های گرم سال، از چالش‌های استفاده از این سیستم در اقلیم گرم و خشک ایران است. در این پژوهش برای حل مشکل فوق، تأثیر تغییر اندازة دریچه‌های تهویه و تغییر عمق حفرة بین دو پوسته را بر کاهش برافروختگی مدلی واقع در شهر یزد، با استفاده از روش شبیه‌سازی CFD (دینامیک سیالات محاسباتی) در نرم‌افزار فلوئنت، بررسی کرده‌ایم. در این بررسی مشخص شد استفادة مناسب از راهکارهای ارائه شده، می‌تواند دمای داخل حفره را در ماه‌های گرم سال به‌صورت میانگین تا 18.8 درجة سلسیوس کاهش دهد. به‌منظور اعتبارسنجی نتایج به‌دست آمده از نرم‌افزار فلوئنت، یک اتاقک دارای نمای دوپوستة بهبودیافته (مجهزشده به بهترین نتایج محاسبات قبلی) با اتاقکی دارای نمای دو پوستة عادی و اتاقکی فاقد نمای دوپوسته در نرم‌افزار Design builder شبیه‌سازی شدند. نتایج حاکی از آن بود که مقدار کل مصرف انرژی اتاقک دارای پوستة دوجدارة بهبودیافته، kwh/m2 14.4 از مدل بدون پوستة دوجداره کمتر است. این موضوع پتانسیل بالای استفاده از این نوع پوسته‌ها را در کاهش مصرف انرژی ساختمانی واقع در اقلیم گرم و خشک ایران نشان می‌دهد. | ||
| کلیدواژه‌ها | ||
| نمای دوپوسته؛ اقلیم گرم و خشک؛ برافروختگی؛ شبیه‌سازی به روش CFD؛ کاهش مصرف انرژی | ||
| عنوان مقاله [English] | ||
| Feasibility Study of Using Double Skin Façade in Architectural Design of Hot-Dry Climate of Iran, in order to Save Energy (Case Study Yazd City) | ||
| نویسندگان [English] | ||
| Mohammad HadiyanPour1؛ MohammadJavad MahdaviNejad2؛ MohammadReza Bemanian3؛ Mohammad Haghshenas1 | ||
| 1Ph.D. Candidate, Art and Architecture Department, Tarbiat Modares University, Tehran | ||
| 2Asociate Professor Art and Architecture Department, Tarbiat Modares University, Tehran | ||
| 3Full Professor Art and Architecture Department, Tarbiat Modares University, Tehran | ||
| چکیده [English] | ||
| Designing an efficient skin for the building can minimize winter heat loss and summer heat gain. Double skin façade (DSF) is a good device for achieving such a goal; but its summer overheating is a problem for using it, especially in hot-dry climates such as Iran plateau. In this study, after reviewing state of the art strategies for cooling façade cavity, the effect of using some of them (such as changing size of the vents and depth of the DSF cavity) in reducing the danger of DSF overheating, in the Yazd City (Iran), is studied. First of all, the effect of using façade vents was analyzed by comparing two models: one had an unventilated DSF and the other (with the same size of DSF) had seven 200 mm2 inlet and outlet vents. The results showed that the ventilated DSF model had better performance (in reducing overheating) than the unventilated one. Then, effect of changing size of the vents in reducing overheating was analyzed. Ventilated DSFs with different vents areas including 12.5, 25, 50, 100, 150 and 200 mm2 were compared. The studies were carried out in three situations: 1- Changing the size of inlet and outlet vent simultaneously, 2- Assuming inlet vent constant (=200 mm2) and changing the outlet vent area, 3- Assuming outlet vent constant (=200 mm2) and changing the inlet vent area. The best results were acquired by assuming 50 mm2 area for inlet vent and 200 mm2 area for outlet. Then, the effect of changing the cavity depth in reducing overheating was analyzed. Ventilated DSFs (with 50 mm2 inlet and 200 mm2 outlet vents) with 100, 200, 400, 600 and 800 mm cavity depth were compared. All models had 2400 mm cavity height. The results showed that the model with 600 mm cavity depth had the lowest temperature and the highest wind speed. At the end of this part of study, the following results were acquired: • The ratio between Input to output vent size should be 1 to 4. • Input and output vents should have the maximum possible. • The ratio between cavity depth to its height should be 1 to 4. • By using the above strategies, cavity temperature can be lower by 18.8 °C in warm months of the year. Finally, in order to validate the results of previous parts, an improved model (equipped with the best strategies from the previous part), a model equipped with normal DSF, and a model without DSF was compared by using Design-builder simulation. The results showed that in cold months, energy consumption of the models with DSF was about 18% lower than the one without it. Also the results showed that using the strategies presented in this paper not only prevents overheating in the DSF cavity, but also can cool off the whole building. The total amount of energy consumption in the improved model was about 10% (14.4 KWh/m2) lower than the model without DSF. This showed the good potential of using double skin façades even in hot-dry climate of Iran. | ||
| کلیدواژه‌ها [English] | ||
| Double Skin Façade, Hot Dry Climate, Overheating, CFD Simulation, Energy saving | ||
| مراجع | ||
|
Baharvand, Mohammad; Bin Ahmad, Mohd hamdan; Safikhani, Tabassom; Majid, R.B.A.; (2013) Design-Builder Verification and Validation for Indoor Natural Ventilation; Journal of Basic Applied Science Resource 3: 182–189.
Chung, Leng Pau; Ahmad, Mohd Hamdan Bin; Ossen, Dilshan Remaz; Hamid, Malsiah (2014) Application of CFD in Prediction of Indoor Building Thermal Performance as an Effective Pre-Design Tool Towards Sustainability; World Applied Sciences Journal 30: 269–279.
Gratia, Elisabeth; De Herde, André; (2004a) Natural ventilation in a double-skin facade; Energy and Buildings 36: 137–146. Gratia, Elisabeth; De Herde, André; (2004b) Optimal operation of a south double-skin façade; Energy and Buildings 36: 41–60.
Gratia, Elisabeth; De Herde, Andre´; (2007a) Greenhouse effect in double-skin facade; Energy and Buildings 39: 199–211. Gratia, Elisabeth; De Herde, Andre´; (2007b) The most efficient position of shading devices in a double-skin facade; Energy and Buildings 39: 364–373.
Hamza, Neveen; (2008) Double versus single skin facades in hot arid areas; Energy and Buildings 40: 240–248.
Hashemi, N.; Fayazb, R.; Sarshar M.; (2010) Thermal behaviour of a ventilated double skin facade in hot arid climate; Energy and Buildings 42: 1823–1832.
Kanga, Daeho; Strand, K. Richard; (2013) Modeling of simultaneous heat and mass transfer within passive down-draft evaporative cooling (PDEC) towers with spray in FLUENT; Energy and Buildings 62: 196–209.
Oesterle, E; Lieb, R.; Lutz, M; Heusler, W; (2001) Double-skin Facades, Integrated Planning; Prestel Verlag, Munich, p. 207. Pei, Fenglai; Yuan, Hongxun; Zhang, Tong; Zhou, Su; (2013) A Study on PEMFC Performance and Faults Diagnosis Using FLUENT 3D Models; Procedia Engineering 61: 370–375.
Radhia, Hassan; Sharples, Stephen; Fikiry, Fayze; (2013) Will multi-facade systems reduce cooling energy in fully glazed buildings? A scoping study of UAE buildings; Energy and Buildings 56: 179–188.
Schittich, C; (2001) Building Skins, Concepts, Layers, Materials; Edition Detail, p. 196. Tseng, Yung-Shin; Wanga, Jong-Rong; Tsai, Fengjee Peter; Cheng, Yi-Hsiang; Shih, Chunkuan; (2011) Thermal design investigation of a new tube-type dry-storage system through CFD simulations; Annals of Nuclear Energy 38: 1088–1097.
Wigginton, M; Harris, J; (2002) Intelligent Skins; Gray Publishing, Tunbridge Wells, Kent, p. 176.
URL 1: http://apps1.eere.energy.gov/buildings/energyplus/weatherdata/2_asia_wmo_region_2/IRN_Yazd.408210_ITMY .zip (visited on 2014-06-04) | ||
|
آمار تعداد مشاهده مقاله: 3,314 تعداد دریافت فایل اصل مقاله: 6,726 |
||