-
Article
1 - The effect of external and internal shading devices on energy consumption and co2 emissions of residential buildings in temperate climateSpace Ontology International Journal , Issue 1 , Year , Winter 2022The use of shading devices to reduce energy consumption can be considered one of the more common methods, its efficiency and impact on reducing carbon emissions have been less considered. the purpose of this study is to evaluate the energy consumption and efficiency of MoreThe use of shading devices to reduce energy consumption can be considered one of the more common methods, its efficiency and impact on reducing carbon emissions have been less considered. the purpose of this study is to evaluate the energy consumption and efficiency of internal and external shading devices that are currently widely used in residential buildings and consequently their effect on reducing carbon emissions. To investigate this, a typical residential building in Gorgan was modeled. At the base of this, two types of interior shading of curtains and roller shades and two external shades overhangs and mat roller shades were examined. In this research, a model with 20 shading device modes was simulated. The modeling and the energy simulations were performed by Design-Builder (Version 6.1.6.005). According to the base-design geometry of the building appropriate shading options were proposed for the south façade and windows were double-glazed (DG). The output data showed that a white curtain with a medium-density openness factor of 3% has the highest efficiency in reducing energy consumption. However, purpose shading could save the annual energy consumption of the building by 4.3% compared to the base case, thus potentially saving up to 9.74 kg of CO2/m2 in the hottest months of the year and 2.45 kg of CO2/m2 annually. While most researchers are looking for sophisticated technologies, some simple methods such as the use of proper shadings can play a significant role in reducing carbon emissions and environmental sustainability. Manuscript profile -
Article
2 - The Effect of Building Blocks Layout on Indoor Thermal Comfort and Energy Consumption of Building in the Humid Subtropical Climate of Caspian CoastSpace Ontology International Journal , Issue 4 , Year , Summer 2023Cities use a lot of energy sources and they form more than 70 percent of global carbon emissions. It is very important to measure the relationship between urban form and energy consumption. The form of different building blocks in the city can create different microclim MoreCities use a lot of energy sources and they form more than 70 percent of global carbon emissions. It is very important to measure the relationship between urban form and energy consumption. The form of different building blocks in the city can create different microclimates and subsequently affect the thermal comfort and energy performance of each building. Building blocks form includes different variables. The purpose of the research was to predict the effect of the layout pattern of building blocks on the thermal conditions of the building and the annual energy consumption of the building. The general pattern of building block layout (discrete, linear, centripetal) and its characteristics, including length, depth and direction, were considered as independent variables of the research and the annual energy consumption of the building as a dependent variable. The thermal conditions in the building are based on the PMV thermal index as a mediating variable. This research is a quantitative study that includes a literature review and research and software analysis. Accordingly, the samples of building block layouts based on typical patterns in the study area located in the CFA climate were simulated using DesignBuilder software and the results were compared with each other results. Energy consumption results have shown a direct relationship with the thermal conditions of the building. The layout patterns of the building block in the form of a medium-depth centripetal (annual energy consumption: 52718.5 wh/m2) and a short-length linear (annual energy consumption: 54127 wh/m2) can be considered as favorable options in terms of annual energy consumption. Also, changing the direction of building blocks with a linear form causes a significant change in energy consumption (It increases by 10.7% compared to the short linear pattern), and in the discrete pattern, considering designing strategy like insulation for external walls are important to prevent heat loss. Manuscript profile -
Article
3 - Prefabricated Concrete Elements for the facade Industry with Nano cement composites containing silica fume, nano-silica and TiO2Journal of Nanoanalysis , Upcoming ArticlesUsing mineral admixtures in cement composites as a way to improve their mechanical and durability properties is a common practice in concrete technology. Among them silica fume and nano-silica effectively influence the composite's early and long-term properties. Due to MoreUsing mineral admixtures in cement composites as a way to improve their mechanical and durability properties is a common practice in concrete technology. Among them silica fume and nano-silica effectively influence the composite's early and long-term properties. Due to the limited particle size distribution of nano and micro silica it is expected that the incorporation of some mineral additives with a size of greater than 500 nm may result in better mechanical and durability performance because of the filler effect. In this study, the effect of different percentages of TiO2 on mechanical properties of cement composites containing nano-silica and silica fume was investigated. Six designs were tested for compressive strength with respect to zero, 2.5 and 5 percent replacement of cement with TiO2. The addition of TiO2 has led to an increase in compressive strength. The best results from the sample with 2.5% TiO2 are obtained. This could be due to the effect of TiO2 particles filling. Comparison of SF3, SF2 and SF1 at 28 days of age showed that SF2 increased the compressive strength. This shows that TiO2 has a great potential for improving the mechanical properties of composite cement.The results showed that the addition of TiO2 had a positive effect on compressive strength. Manuscript profile -
Article
4 - Prefabricated Concrete Elements for the facade Industry with Nano cement composites containing silica fume, nano-silica, and TiO2Journal of Nanoanalysis , Issue 2 , Year , Spring 2021Using mineral admixtures in cement composites as a way to improve their mechanical and durability properties is a common practice in concrete technology. Among them, silica fume and nano-silica effectively influence the composite's early and long-term properties. Due to MoreUsing mineral admixtures in cement composites as a way to improve their mechanical and durability properties is a common practice in concrete technology. Among them, silica fume and nano-silica effectively influence the composite's early and long-term properties. Due to the limited particle size distribution of nano and micro-silica, it is expected that the incorporation of some mineraladditives with a size greater than 500 nm may result in better mechanical and durability performance because of the filler effect. In this study, the effect of different percentages of TiO2 on the mechanical properties of cement composites containing nano-silica and silica fume was investigated. Six designs were tested for compressive strength with respect to zero, 2.5, and 5 percent replacementof cement with TiO2. The addition of TiO2 has led to an increase in compressive strength. The best results from the sample with 2.5% TiO2 are obtained. This could be due to the effect of TiO2 particles filling. Comparison of SF3, SF2, and SF1 at 28 days of age showed that SF2 increased the compressive strength. This shows that TiO2 has a great potential for improving the mechanical properties ofcomposite cement. The results showed that the addition of TiO2 had a positive effect on compressive strength. Increasing TiO2 nanoparticles content of more than 3 wt% is caused to reduce the compressive strength according to past studies. But in this study is shown that by adding 3% nanocillis or 20% silicified to increased TiO2 nanoparticles content of more than 3% wt, the results ofcompressive strength are not reduced. The use of 3% combined nano-silica or 20% silicafium will cover this defect of increased TiO2 nanoparticles content ofmore than 3% wt. Manuscript profile -
Article
5 - شناسایی تأثیر ایجاد محله پیادهمدار در جهت سلامتی (موردمطالعه: محله کورکوردسر-شهر نوشهر)Urban Futurology , Issue 13 , Year , Summer 2024پیادهروی یکی از روشهای مناسب افزایش تحرکات جسمانی بوده و این موضوع میتواند نقش مؤثری در بهبود شرایط جسمانی ساکنان شهرها داشته و سلامتی را برای ساکنین شهرها به ارمغان آورد. پی More
پیادهروی یکی از روشهای مناسب افزایش تحرکات جسمانی بوده و این موضوع میتواند نقش مؤثری در بهبود شرایط جسمانی ساکنان شهرها داشته و سلامتی را برای ساکنین شهرها به ارمغان آورد. پیادهروی یکی از مؤثرترین ورزشهای موجود در سلامتی شهروندان میباشد که با توسعه زندگی ماشینی در جوامع و بهخصوص در شهرها و متعاقباً کاهش فعالیتهای فیزیکی شهروندان روزانه تعداد فراوانی از شهرنشینان به بیماریهای ناشی از عدم فعالیتهای فیزیکی مبتلا میشوند. روش تحقیق توصیفی و کتابخانهای میباشد. جامعه آماری تحقیق شامل 1123 نفر جمعیت ساکن در محله مسکونی کورکوردسر واقع در شهر نوشهر میباشد. حجم نمونه برابر 286 نفر میباشد. برای تجزیهوتحلیل دادههای تحقیق از آزمون تی تک نمونهای استفادهشده است. نتایج حاصل از تحقیق نشان داده است که بر اساس نتایج حاصل از آزمون تی تک نمونه و در بررسی ساکنین محله میتوان بیان داشت که بالا بردن قابلیت پیاده مداری یک محله نقش بر سلامتی (کاهش چاقی) ساکنین محله مؤثر میباشد پنج بعد فرعی (شاخص ايمنی، شاخص امنیت، شاخص مبلمان، شاخص دسترسی به خدمات، شاخص تسهیلات حملونقل، شاخص جذابیت و فضای سبز) بر سلامتی (کاهش چاقی) ساکنین محله مؤثر میباشد ولی بالا بردن قابلیت پیاده مداری یک محله بر اساس شاخص فعالیتهای اجتماعی نقش مؤثری بر سلامتی (کاهش چاقی) ساکنین محله ندارد. نتایج این پژوهش نشانگر این است که برای اینکه پیادهمداری بهعنوان یک بخش از زندگی افراد در جهت حفظ سلامتی باشد باید به شاخصهای لازم و ضروری توجه بیشتری شود و همچنین کیفیت مطلوب پیادهراهها امری مهم است که باید به آن نیز توجه شود.
Manuscript profile -
Article
6 - ارزیابی تأثیر شاخصهای محیط بر میزان سلامت جسم با تأکید بر نقش واسطهای ترجیح ساکنین در محلههای مسکونی استان مازندرانUrban Futurology , Issue 12 , Year , Spring 2024عدم تحرک بدنی یکی از عوامل خطر پیشرو، برای مرگومیر جهانی است که حدود 20 تا 30 درصد تخمین زده میشود. محیط نقش به سزایی در سلامت جسمانی انسان ایفا میکند؛ اما دانش در مورد ویژگیهای محیطی ادراکشده توسط فرد، بر میزان سلامتی از بسیاری از جهات ناشناخته باقیمانده است. بر Moreعدم تحرک بدنی یکی از عوامل خطر پیشرو، برای مرگومیر جهانی است که حدود 20 تا 30 درصد تخمین زده میشود. محیط نقش به سزایی در سلامت جسمانی انسان ایفا میکند؛ اما دانش در مورد ویژگیهای محیطی ادراکشده توسط فرد، بر میزان سلامتی از بسیاری از جهات ناشناخته باقیمانده است. بر همین اساس این پژوهش ارﺗﺒﺎط ﺑﯿﻦ ﺑﺮﺧﯽ ﻣﺘﻐﯿﺮﻫﺎي ﻋﻮاﻣﻞ ﺳﻄﺢ ﻣﺤﻠﻪ ﺑﺎ ﺳﻼﻣﺖِ خود رتبهبندی شده (SRH) در بین مردم مازندران را موردبررسی ﻗﺮار میدهد، ارﺗﺒﺎط عوامل محیطی با میزان سلامت جسم را مقایسه و سپس نقش ترجیح محیط بهعنوان متغیر واسطهای بررسی میگردد. این تحقیق ازنظر هدف از نوع تحقیقات کاربردی و به لحاظ نحوه گردآوری اطلاعات، از نوع پیمایشی و توصیفی محسوب میشود. در گام نخست عوامل مؤثر بر ادراک محیط از منابع معتبر داخلی و خارجی استخراج گردید و سپس توسط پرسشنامه نظرات افراد ثبت شد. جامعهی آماری توسط نمونهگیری طبقهبندیشده با تعداد نمونهی 450 نفر در محلات برگزیدهی شهرهای نور، آمل، بابلسر و چالوس در استان مازندران انجام گردید. پرسشنامه در دو بخش و بهطور همزمان جمعآوری ﺷﺪ. در بخش اول ﺑﺮاي اندازهگیری ﺳﻼﻣﺖ جسمانی از پرسشنامهی استاندارد سلامت خود رتبهبندی شده استفاده شد. سپس ﺑﺮاي ﺳﻨﺠﺶ ادراک ویژگیهای ﻣﺤﻠﻪ و ترجیحات افراد نسبت به محیط ﻣﺤﻠﻪ، تأثیر مؤلفههای یکسان، شامل؛ امکانات، امنیت، مقصد و زیباییشناسی موردسنجش قرار گرفت. دادههای جمعآوریشده توسط، برازش مدل یابی معادلات ساختاری مورد تحلیل قرار گرفت. نتایج نشان داد که ادراک ویژگیهای محیط با عدد 0.30 بر میزان سلامت جسم مؤثر است، همچنین ویژگی محیط نیز با عدد 0.15 بر ترجیح محیط اثر مثبت و معنادار داشت. عامل ترجیح محیط بهعنوان متغیر واسطهای با عدد 0.18- بر میزان سلامت نتیجهی معکوس و معنادار داشت. بهطوریکه با کاهش ترجیحات محیط، شاهد افزایش سلامت جسم هستیم. Manuscript profile -
Article
7 - Application of Nanoscience in Self-cleaning Properties of Concrete Facade for Development of Sustainable EnvironmentAnthropogenic Pollution , Issue 1 , Year , Winter 2020Using mineral admixtures in cement composites as a way to improve their mechanical and sustainable environmental properties is a common practice in concrete technology. Among them nano-silica effectively influences the composite's early and long-term properties. In this MoreUsing mineral admixtures in cement composites as a way to improve their mechanical and sustainable environmental properties is a common practice in concrete technology. Among them nano-silica effectively influences the composite's early and long-term properties. In this study, the effect of different percentages of TiO2 (0, 2.5 and 5 %) on self-cleaning properties and water absorption of cement composites containing nano-silica were investigated. according to the use of different cementitious material (nano-silica) and TiO2 in mix proportions, to obtain mixtures with a desirable workability, superplasticizer was added in different volume percentages.Better size distribution and pore refinement lead to a denser cement matrix with low porosity which in turn considerably lower the water absorption of the cement composites. the maximum final water absorption according to ASTM C497 is 9% for method A and 8.5% for method B. Comparsions of water absorption tests as a result of adding of TiO2 and nano-silica in concrete show that the maximum final water absorption is 4.9% in N1 design mixture and the minimum final water absorption is 4.3% in N2 design mixture.The incorporation of TiO2 has positively affected the results for nano-silica containing specimens. A decrease of 6.5% and 11.1% between N1 and N3 respectively shows the positive effect of TiO2 on decrease of water absorption. The results show that TiO2 along with nanosilica has great potential for improving the environmental and self- cleaning properties of concrete facades of buildings in cities exposed to high levels of cleanliness. Manuscript profile