List of Articles بهینه‌سازی مصرف انرژی

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  1 - Economic Analysis and Assessing Energy Performance of Simulation-Powered Optimal Window Type and Window to Wall Ratio for Residential Buildings in Tehran
  Alireza Karimpour Darab Diba Iraj Etessam
  Sustainable development as a process for meeting human development goals has an undeniable impact on all aspects of human life while sustaining the ability of natural systems to continue to provide the natural resources. In spite of worldwide climate change problems cau More

  Sustainable development as a process for meeting human development goals has an undeniable impact on all aspects of human life while sustaining the ability of natural systems to continue to provide the natural resources. In spite of worldwide climate change problems caused by fossil fuel use, energy consumption levels in Iran are already high and continue to rise each year. About 40% of energy consumed by the residential buildings in this country is fossil fuel-derived. Therefore providing solutions to reduce energy consumption in this sector is very important.Tehran is the largest city of Iran and significant amounts of energy are consumed in this city. However, due to its location in semi-arid climatic region, it benefits from high sun’s radiation even in winter and low relative humidity of the air. There is high potential for energy conservation in residential buildings of Tehran. Therefore the introduction of energy efficient buildings in this city would have a significant overall impact on national energy consumption levels.Nowadays, sun shading devices are one of the most efficient elements to manage the interaction between the interiors and exteriors of buildings. They can significantly reduce cooling energy demand, improve thermal comfort, prevent the heat loss in the winter and reduce potential glare problems in residential ( (also in office and commercial) buildings.Sun shading devices can be categorized according to their placement as interior, exterior and mid-pane. Result of research and studies shows that the effectiveness increase 35% by using outside shade protection instead of inside one. This research is aware of this fact that optimized internal sun shading devices are not comparable with the external sun shading devices in efficiency and performance. Although due to the increased utilization of them in the residential buildings, this research studied the internal sun shading devices and determined the optimized internal sun shading system, and then analyzed its effect on the energy consumption in the residential building model.In this study at the first phase, the combination of four types of internal sun shading devices with three types of windows are evaluated by the Parasol simulation software to determine the optimized internal sun shading system. Simulations show that the double glazed transparent window with white dense reflective Blind ( (as optimized sun shading system), has most appropriate thermal behavior.At the next step, a building model as a case study ( (The six-story apartment in the city of Tehran) was considered for simulations of energy consumption. The Building Calc. software was applied for energy simulations and heating, cooling and total energy consumption of building was calculated with and without optimized internal sun shading system. The result shows that efficiency of internal sun shading devices increase by using dense texture, high reflectance and low transfer rate.Energy consumption of residential buildings in Tehran reduced up to 14% only by using optimized internal sun shading system. This method could be one of the best solutions to reduce the energy demand in residential buildings because of the large coordination with Iran’s economic, cultural and social conditions.Keywords: Sustainable development, Energy conservation, Sun shading system, Internal sun shading device, Energy consumption simulation. Manuscript profile
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  2 - Investigation of the effect of roof insulation and double wall effect on the energy consumption of office building in Garmsar city with design-builder software
  Mehdi Shahhoseini Hadi Kargar Sharifabad
  In today's world, the national security of most countries has depended on secure energy access, and therefore the optimum use of it has been the focus of attention of many statesmen and researchers. Expansion of consumption in the household sector and waste of energy in More

  In today's world, the national security of most countries has depended on secure energy access, and therefore the optimum use of it has been the focus of attention of many statesmen and researchers. Expansion of consumption in the household sector and waste of energy in the urban community are among the obvious reasons for the rapid growth of energy consumption in the national economy. For this reason, energy consumption in the building sector needs to be considered. In this paper, after simulating an office building in Garmsar City with Design-Builder Software and validating it, the effect of the roof insulation and double wall parameters on the energy consumption has been investigated. The results show that the roof insulation and the use of a double wall can have a significant impact on building energy consumption. Manuscript profile
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  3 - Building office energy modelling in Garmsar with designbuilder and study the impact of different solutions in energy optimization
  Mehdi Shahhoseini Hadi Kargar Sharifabad
  The contribution of the building sector to the energy consumption of countries is significant, so in the last few decades, in most industrialized countries, basic measures have been taken to reform the consumption model , using various tools including regulations and cr More

  The contribution of the building sector to the energy consumption of countries is significant, so in the last few decades, in most industrialized countries, basic measures have been taken to reform the consumption model , using various tools including regulations and criteria . In this study, the use of the type of material used in the walls of the city buildings in the Garmsar city building was analyzed. The comparison of the heat transfer coefficient of each material used on the external walls of the building is modeled and the building is evaluated with basic materials according to the climatic conditions of the city. Finally, using new materials in the outer wall and ceiling, building with double wall is a priority in reducing energy consumption. Manuscript profile
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  4 - Investigating the effect of replacing a double glass window with snigle window in an office building in the Semnan climate with Designbuilder software
  afshin fathalian Hadi Kargar Sharifabad
  The main cause of the energy dissipation in buildings in the country, in addition to design style of employment in the town of Bad materials in different parts of the building. It can be simple solutions to the implementation of some of the loss of a significant amount More

  The main cause of the energy dissipation in buildings in the country, in addition to design style of employment in the town of Bad materials in different parts of the building. It can be simple solutions to the implementation of some of the loss of a significant amount of renewable energy. In this study , optimize energy consumption in an administrative building in Semnan province climate in a bid to replace the window glass - with the designated low dispatch in foreign wall instead of single - walled window with the situation by simulator design builder software was investigated. Results of energy - saving by 12 percent annually in the coolant load, 2 percent in heating load and 11 percent of the total sample building in loads. Manuscript profile
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  5 - Control of Indoor Environmental Conditions Based on the Model and Use of Predictive Control Method
  AmirReza Alizadeh Seyed Mohamad Kargar
  In this paper, a model predictive control approach is presented to regulate indoor temperature. In recent years, the highest energy consumption in buildings is related to heating, ventilation, and air conditioning systems. Therefore, the control of heating, ventilation, More

  In this paper, a model predictive control approach is presented to regulate indoor temperature. In recent years, the highest energy consumption in buildings is related to heating, ventilation, and air conditioning systems. Therefore, the control of heating, ventilation, and air conditioning systems in buildings has been taken into consideration to reduce energy consumption. At first, a construction model is designed in the Energy-plus software, then all input and output data is collected from this software to identify the state-space model. Then the Model-based predictive control algorithm is applied to control the indoor building temperature. The contribution of this paper is two-fold. Firstly, the data used in the system identification section is based on the assumption that the rooms are not isolated. There is a temperature relationship between the rooms, which provides a more realistic model of the system. Secondly, the external ambient temperature is considered as a disturbance, and its effect on controller design has been investigated. The simulation results for 24 hours show the good performance of the model predictive control approach over the optimal control method along with reducing energy consumption while maintaining the optimal temperature conditions. Manuscript profile