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پنجرهی هوا جریان عنصری کارآمد در کاهش مصرف انرژی ساختمان در شهر تهران | ||
| نشریه هنرهای زیبا: معماری و شهرسازی | ||
| مقاله 2، دوره 20، شماره 2، مرداد 1394، صفحه 13-22 اصل مقاله (384.83 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfaup.2015.56714 | ||
| نویسندگان | ||
| مریم محمدی* 1؛ شاهین حیدری2 | ||
| 1کارشناس ارشد انرژی و معماری، پردیس هنرهای زیبا، دانشگاه تهران | ||
| 2استاد دانشکده‌ی معماری، پردیس هنرهای زیبا، دانشگاه تهران، تهران | ||
| چکیده | ||
| در چند دهه‌ی گذشته و مقارن با شروع بحران انرژی در جهان، تلاش‌ها در جهت کاهش مصرف انرژی در حوزه‌ی ساخت وساز، منجر به عایق‌کاری‌های وسیع پوسته در ساختمان‌های نوساز و قدیمی شد. عایق‌کاری به معنای جلوگیری از انتقال حرارت و نیز جلوگیری از نشت و نفوذ هوای سرد، متخصصان صنعت ساختمان را در سراسر جهان با چالش جدیدی در ارتباط با کیفیت هوای درون و چگونگی تأمین هوای تازه مواجه کرده است. این چالش، هنگامی که در کنار گرایش به استفاده از سطوح گسترده‌ی شیشه‌ای در ساختمان‌ها قرار گرفته است، منجر به ابداع نوع جدیدی از پنجره گردیده که تا حدی به مشکلات با شیوه‌ای نوین پاسخ می‌دهد. هدف مقاله‌ی حاضر، معرفی و امکان‌سنجی استفاده از این پنجرهی جدید به صورت بومی است. برای دست‌یابی به این هدف، به بررسی ساختاری پنجره با استفاده از شبیه‌سازی‌های کامپیوتری و انجام محاسبات عددی پرداخته شده‌است تا در پرتوی آن، به بهترین ساختار با عملکردی بهینه در اقلیم شهر تهران دست یابیم. نتایج پژوهش نشان‌دهنده‌ی توانایی بالای این پنجره در راستای افزایش بهره‌وری سطوح شیشه‌ای (کاهش مصرف انرژی در هر دو بخش انتقال حرارت و تهویه) در مقایسه با پنجره‌های چند جداره‌ی معمولی است. | ||
| کلیدواژه‌ها | ||
| پنجرهی هواجریان؛ تهویه؛ انتقال حرارت؛ کاهش مصرف انرژی؛ بازیافت حرارت؛ کنترل کیفیت هوای داخل | ||
| عنوان مقاله [English] | ||
| Air Flow WindowAn Effective Element in Reduction of Buildings' Energy Consumption in Tehran | ||
| نویسندگان [English] | ||
| Maryam Mohammadi1؛ Shahin Heidari2 | ||
| 1MA in Energy & Architecture, School of Architecture, College of Fine Arts, University of Tehran, Tehran | ||
| 2Associate Professor, School of Architecture, College of Fine Arts, University of Tehran, Tehran | ||
| چکیده [English] | ||
| In the past few decades, at the time of the beginning of energy crisis in the World, efforts to reduce energy consumption in buildings has led to vast and serious skin insulation in both old and new buildings. Insulation to avoid heat transfer and cold air infiltration, along with supplying fresh air and maintaining indoor air quality has challenged experts in the building industry all over the world. When this challenge gets together with the tendency to use more glass surfaces in buildings, a new kind of window is invented to fairly overcome troubles in a novel way. This new window, named “supply air window”, is one of the four kinds of “air flow windows”. In a supply air window there are three layers of glass, a conventional double glazed sealed unit and a third sheet of glass. The air gap between the double glazed unit and the third sheet is not sealed. There is a vent hole to the outdoors at the bottom and another vent leading to the indoors at the top. Fresh air comes in from the bottom and moves up between the panes of glass before entering the room. As it rises, the air collects heat from the indoor pane of glass and carries it up into the room instead of allowing the heat to escape outside. Furthermore, heat from sun, trapped between the glass layers (greenhouse effect), is also collected and carried into the house. You get fresh air coming into the room but it is not such cold air, having recycled energy which would otherwise have escaped, and picked up more from the sunshine. The effective U-value is dramatically decreased. The purpose of this article is introducing the supply air window and implementing feasibility study about its endemic use. To achieve this goal, structural investigation of the window has been done using computer simulation-with WIS program- and numerical calculation -according to ISO standards- to find the best structure with the optimum performance for heating period in Tehran. Results of the investigations on 5 different configuration showed that having one Low-E coating on the third layer of the window (with other characteristics mentioned in the paper), leads to the best temperature and comfort conditions and eventually with the lowest energy consumption, it can have the best performance. Also, the influence of parameters such as air velocity, depth of the ventilated space and windows geometry on the performance of the window, were studied. After that, the impact of the window on the building was examined through its use in a given room and comparing the results of obtained consumption load with the room with conventional windows. The results indicates higher ability of the new window to increase the performance of glass surfaces (reducing heat transfer and improving thermal comfort) and also reduction in energy consumption in the ventilation part, so that utilizing supply air window leads to 46% final energy saving compared to triple pane window and 50% reduction in energy consumption compared to ordinary double pane windows | ||
| کلیدواژه‌ها [English] | ||
| Air Flow Window, Ventilation, Heat transfer, Energy Consumption Reduction, Heat Recovery, Indoor Air Quality Control | ||
| مراجع | ||
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محمدی مریم (1391)، امکان‌سنجی استفاده از پنجره‌های دولایه‌ی تهویه شونده و بررسی تأثیر آن بر عملکرد حرارتی ساختمان‌های مسکونی، رساله کارشناسی ارشد انرژی و معماری، دانشگاه تهران، تهران، ایران
Appelfeld, David; Svendsen, Svend (2011), Experimental analysis of energy performance of a ventilated window for heat recovery under controlled conditions, Energy and Buildings, Vol. 43, pp. 3200–3207.
Barakat, S.A (1987), Thermal Performance of a Supply-Air Window, 12 Annual Passive Solar Conference, July 12-16, 1987, Canada, Vol. 12, pp.152-158.
Erhorn, Hans(2007), BESTFAÇADE, Best Practice for Double Skin Façades, WP 4 Report “Simple calculation method, Technical report,Fraunhofer-Institute for Building Physics (IBP), Stuttgart, Germany.
Fuliotto, Roberto (2008), Experimental and Numerical Analysis of Heat Transfer and Airflow on an Interactive Building Façade, PhD Thesis, University of Cagliari, Italy.
Gosselin, J.R; Chen, Q (2008),A Dual Airflow Window for Indoor Air Quality Improvement and Energy Conservation in Buildings, HVAC&R Research, 14(3), pp. 359-372.
McEvoy, M.E; Southall, R.G; Baker, P.H (2003), Test cell evaluation of supply air windows to characterise their optimum performance and its verification by the use of modelling techniques, Energy and Buildings, Vol. 35, pp. 1009-1020.
Perino, Marco; Aschehoug, Øyvind (2009), Expert Guide, Part 2, Responsive Building Elements, Energy Conservation in Buildings and Community Systems Programme, International Energy Agency.
Raffnsøe, Lau Markussen (2007), Thermal Performance of Air Flow Windows, Master Thesis, Department of Civil Engineering, Technical University of Denmark.
Taminskas, Jonas; Domarkas, Giedrius (2011), Ventilation window with solar shading/night blind, Master Program in Indoor Environmental Engineering, Department of Civil Engineering, Aalborg Universitet, Denmark.
Van Dijk, H.A.L; Oversloot H.P(2003), WIS, the European Tool to Calculate Thermal and Solar Properties of Windows and Window Components, Proceedings of Building Simulation, Eighth International IBPSA Conference, August 11-14, 2003, Netherlands, pp.259-266.
WinDat, Window Information System software (WIS), 2004–2006, http://www.windat.org /wis /html/index.html.
http://www.hansengroup.biz/hansen3g/index , PDF file.
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