ارزیابی عملکرد دو سامانه حرارتی ایستا از نظر تقاضای انرژی گرمایشی در مکان های شهری (مورد مطالعه: ساختمان اداری اصفهان) (مقاله علمی وزارت علوم)
درجه علمی: نشریه علمی (وزارت علوم)
آرشیو
چکیده
ضرورت کاهش مصرف منابع در توسعه پایدار تأکید شده است. یکی از جنبه های پایداری در ساختمان بر کاهش مصرف انرژی یا افزایش بهره وری انرژی معطوف می شود. تکنیک های گرمایش ایستا مصرف انرژی ساختمان را کاهش می دهد و عملکرد حرارتی ساختمان را بهبود می بخشد. گرمایش ایستا بر پایه استفاده از انرژی حرارتی خورشید استوار است. بدین ترتیب، استفاده از عناصر ایستا در نمای ساختمان، راه حل مؤثری برای بهبود محیط حرارتی، کاهش مصرف انرژی و کاهش اثرات تغییرات آب وهوایی محسوب می شود. هدف از این مقاله، سنجش بازدهی و عملکرد حرارتی ساختمان در دو سامانه گلخانه و پنجره خورشیدی در فصل سرما و تعیین سامانه بهینه در یک ساختمان اداری است. ساختمان های اداری ازجمله مکان های شهری با مصرف بالای انرژی شناخته می شوند. به همین جهت، ساختمان شهرداری منطقه دوازده اصفهان به عنوان نمونه مطالعاتی مدنظر قرار گرفت و سناریوهای مربوط به هر سامانه پردازش شد. شبیه سازی مصرف انرژی در نرم افراز دیزاین بیلدر و با استفاده از موتور انرژی پلاس انجام گرفته است. از رهگذر محاسبات کمی و شبیه سازی رفتار انرژی در ساختمان، بار گرمایشی مورد نیاز در فصل سرما برای هرکدام از سناریوها برآورد شد. نتایج حاکی از این است که استفاده از پنجره خورشیدی به میزان 33.03 درصد و استفاده از گلخانه به عمق یک متر به میزان 17.39 درصد، انرژی گرمایشی سالیانه ساختمان را در نسبت با حالت معمولی ساختمان (بدون استفاده از سامانه های حرارتی ایستا) کاهش می دهد. بنابراین استفاده از پنجره خورشیدی سه جداره تقریباً دو برابر استفاده از گلخانه با عمق یک متر، عملکرد حرارتی ساختمان را در فصل سرما بهبود می بخشد.Performance evaluation of two static heating systems in terms of heating energy demand in urban locations (case study: Isfahan office building)
IntroductionThe growing emphasis on sustainable development has highlighted the critical need to reduce resource consumption across various sectors, and the building industry is no exception. With buildings significantly contributing to energy consumption and greenhouse gas emissions, strategies that enhance energy efficiency are paramount. One vital aspect of sustainability in the built environment focuses on reducing energy consumption while simultaneously improving the thermal performance of buildings. Among the innovations in this domain, static heating techniques have emerged as effective solutions that leverage renewable energy sources, particularly solar thermal energy.Static heating systems are ingenious in their design as they integrate seamlessly into building envelopes, offering an innovative means to utilize solar energy. These systems typically employ elements such as thermal mass or specially designed panels on building facades, exploiting the sun's energy for heating purposes. The primary advantage of incorporating such static elements is their ability to resonate with the energy dynamics of the natural environment, thereby improving overall energy efficiency and optimizing indoor thermal comfort.Research MethodologyIn pursuit of the goals set forth by sustainable development, this paper seeks to measure the efficiency and thermal performance of buildings utilizing two specific solar-based systems: greenhouse systems and solar window installations during the cold season. Office buildings, in particular, have gained attention due to their relatively high energy consumption patterns compared to other building types. As workplaces that are often occupied throughout the day, they demand significant energy for heating, cooling, and lighting. Consequently, even minor improvements in energy efficiency within office buildings can lead to substantial reductions in energy consumption and associated costs. One specific case study was conducted on the Municipality Building of District 12 of Isfahan, selected for its representative nature among urban office buildings. This building provided an ideal context to examine the impact of static heating solutions under varying scenarios. The two systems studied—greenhouse systems and solar windows—were modeled and simulated using the Afraz Design Builder software, which enables detailed energy consumption predictions based on specific building configurations and local climate conditions.Result and DiscussionTo effectively assess the performance of each system, a comprehensive simulation of the building's energy consumption patterns was carried out, taking into account factors such as orientation, thermal insulation, window-to-wall ratio, and local weather conditions. The aim was to quantify the required heating load during the cold season for each static heating scenario compared to the baseline state of the building, which represented the conventional design without any enhancements aimed at energy efficiency. The findings from this research have provided valuable insights into the effectiveness of each heating strategy. The first system investigated, the solar window, utilizes advanced glazing technology designed to enhance solar heat gain while minimizing heat loss. The results of the simulation revealed that the incorporation of a triple-glazed solar window dramatically improved thermal performance. Specifically, it was found that the solar window reduced annual heating energy demand by approximately 33.03% compared to the conventional building setup. This significant reduction underscores the potential of modern window technologies to harness solar energy effectively, thereby reducing reliance on conventional heating methods. On the other hand, the second system, a 1-meter-deep greenhouse, also yielded promising results, albeit to a lesser extent. The greenhouse system functions by extending the thermal mass concept and creating an insulated buffer zone, which can store heat during the day and release it during colder nights. The simulation data indicated that this approach successfully reduced the building's heating energy requirements by 17.39% when compared to the standard design. While this percentage is lower than that achieved with the solar window, it still exemplifies the significant contributions that such passive solar design strategies can make towards enhancing energy efficiency in buildings.ConclusionIn summary, the analysis concluded that the integration of these static heating systems not only enhances thermal comfort within office settings but also significantly mitigates energy consumption, aligning with the broader objectives of sustainable development. The results clearly demonstrate that the application of a triple-glazed solar window can nearly double the energy savings when compared to a traditional greenhouse system. These findings suggest that prioritizing technologies that significantly boost solar gain and thermal management can lead to transformative improvements in building energy performance.Moreover, the implications of these results extend beyond individual buildings. When scaled to a larger context, widespread adoption of such sustainable technologies could lead to substantial reductions in energy demand at the urban level, thereby addressing broader challenges associated with climate change and resource depletion. The importance of implementing these strategies in urban planning and building design cannot be overstated, as cities continue to grow and face mounting pressure to reduce their ecological footprints.Ultimately, the exploration of static heating techniques highlights a promising pathway towards achieving sustainable, energy-efficient buildings. The research presented in this paper contributes to a growing body of knowledge that seeks to optimize building design for energy performance, demonstrating that thoughtful integration of solar technologies can have profound benefits for both the environment and building occupants. Continued innovation, research, and collaboration among architects, engineers, and policymakers are essential to further advance the implementation of sustainable practices in the construction industry.
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