جستجوی مقالات مرتبط با کلیدواژه « بهینه سازی انرژی » در نشریات گروه « علوم انسانی »

Iran is facing challenges in the energy and environmental sectors, such as energy wastage, depletion of oil and gas resources, destruction of vegetation, soil, and water bodies, which impose significant costs on the country. On the other hand, international cooperation to reduce greenhouse gas emissions and acceding to the Paris Agreement is a fundamental issue for the country. However, even without joining this Agreement, Iran is compelled to optimize energy production and consumption and protect the environment in order to preserve its natural resources and reduce the costs of the energy sector. This article, recruiting a descriptive method and legal analysis, examines how Iran's self-initiated actions in energy optimization and protection of natural carbon sinks are aligned with the reduction and mitigation commitments of the Paris Agreement in addressing climate change, and to what extent the utilization of this alignment is necessary for cooperation in achieving the objectives of this Agreement and the country's national interests.

In this research, energy data of the country from 1374 to 1397 are presented and econometric analysis and decomposition analysis methods (Laspeyres and Logarithmic mean Divisia index) are used to identify and determine the effect of activity, structure and energy intensity on energy consumption. The results of econometric method analysis show that the fitted function of energy consumption based on the two variables of population and value added with R2 = 99% is valid and the population factor has a greater effect than the value added factor on changes in energy consumption. The results of the Decomposition analysis show that the Divisia method has a higher accuracy than the Laspeyres method and according to this method and during the whole period, the average structural effect is 48%, activity effect is 18% and energy intensity effect is 18% in increasing energy consumption.

The purpose of this research is to study the comfort conditions and determine the best measures for design and architecture compatible with the climate in Yazd. In this regard, the climatic data of Yazd city has been used in EPW format during the period (1981-2017). The results of the study of temperature and relative humidity also showed that temperatures of more than 38 ° C are visible in June and July. This suggests the need for a shadow in the architecture of the climate. In July, the discomfort conditions prevail over the entire day. From June to October (midday to midnight), midnight hours due to low humidity (38%) and high temperatures, conditions of discomfort and drought are very visible. The highest humidity is in the cold months of the year. In the wind hours of February to May (February to April), there is a discomfort. Also, according to the overall radiation pattern at different hours of the day, it was also shown that 25% of the daylight hours is very high and non-comfort, and 8% are in comfort conditions, which is more related to the cold weather of the year and the early hours And the end of the day. In general, due to the climate of Yazd city and the results of analysis, 20 strategies for architectural design have been used.
In general, due to the climate of Yazd city and the results of analysis, 20 strategies for architectural design have been used.

The costs of a project is included the design and implementation and the costs of ownership, (operation, maintenance and expenditures) throughout the project’s life cycle. One of the building’s Operational period costs is the cost of energy that the energy consumption analysis during the design phase can lead to major savings in the project’s life cycle.The rapidly growing world energy use has already raised concerns over supply difficulties, exhaustion of energy resources and heavy environmental impacts (ozone layer depletion, global warming, climate, etc.). The global contribution from buildings towards energy consumption, both residential and commercial, has steadily increased reaching figures between 20% and 40% in developed countries, and has exceeded the other major sectors: industrial and transportation. Growth in population, increasing demand for building services and comfort levels, together with the rise in time spent inside buildings, assure the upward trend in energy demand will continue in the future. For this reason, energy efficiency in buildings is today a prime objective for energy policy at regional, national and international levels.In this research, Value engineering workshop, consisting of specialized working Group of Project Management, Architecture and Civil Engineering was formed to study energy efficiency in building’s facade (Case Study: Omid commercial-residential complex in Mashhad) and the proposed options were assessed in the design phase and after the consensus of expert opinions, by using the brainstorming method, improving ideas were replaced. Finally, evaluation of options and the calculation of difference between them were presented. This research is a descriptive and practical study. The data collection tool was a literature review and case study. The study aims to assess the studies of value engineering to increase the quality and reduce the cost of architectural designs and delivering a sample of proposed solutions in order to use value engineering services in these designs. So far, the value engineering is the most practical in the fields of industrial, agriculture, transport and services design in the world. This study aimed to express the results of value engineering as applied to architecture projects, in order to reduce the costs and energy consumption in façade design by using the Energy Plus software and it shows the practicability and usefulness of the value engineering in architectural projects. Findings shows that studies of value engineering in architectural projects have the following

improving the level of staff’s knowledge, unfolding the weaknesses of the primary design, Achieving new solutions, Encourage to participation and work in groups, Simplification of the design, making needs and goals of the project clear, Coordinating the various proceedings and reduce the costs.

The growing demand of power has made the power plants of scientific interest, but most of the power plants are designed by the energetic performance criteria based on first law of thermodynamics only. The real useful energy loss cannot be justified by the first law of thermodynamics, because it does not differentiate between the quality and quantity of energy. The objective of this paper is to perform the energy, exergy analysis for the Besat steam power plant located in Tehran.The results show that energy losses have mainly occurred in the condenser where around 77% of the total power plant energy losses are lost to the environment. Nevertheless, the exergy destruction rate of the boiler is higher than the exergy destruction rates of the other components. It is due to the fact that the combustion reaction and its high temperature are the most significant sources of exergy destruction in the boiler system. The second large exergy destruction occurs in the turbine system. So significant improvements potential exist in the boiler and turbine unit