List of Articles photovoltaic cell

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  1 - An intelligent adaptive skin from a biomimetic approach for energy consumption reduction
  hossein mahyari Afsaneh Zarkesh Mohammadjavad Mahdavinejad
  10.30495/hoviatshahr.2022.64865.12140
  AbstractOne of the challenges facing human beings today is the excessive consumption of fossil fuels, which has led to the depletion of non-renewable energy sources and greenhouse gas emissions, as well as global warming and climate change. This challenge has led to the More

  AbstractOne of the challenges facing human beings today is the excessive consumption of fossil fuels, which has led to the depletion of non-renewable energy sources and greenhouse gas emissions, as well as global warming and climate change. This challenge has led to the search for solutions to reduce fossil fuel consumption, such as optimizing and reducing energy consumption and the use of renewable energy. One of the most important areas of energy consumption is man-made in the field of architecture. On the other hand, one of the most important parts of a building that interacts with the outside environment is its outer skin. In this study, the need to pay attention to the outer skin of the building, as one of the most important parts that can manage and control the amount of energy consumption in a building, has been addressed. Its purpose is to achieve appropriate and effective solutions to reduce energy consumption in the building by the adaptive skin. One of the sources of modeling is the study of the process of reaction of living organisms to their external conditions. In this research, general solutions to reduce building consumption in the field of outer skin as well as the convergence of challenges of a building skin and mechanisms in nature for survival are discussed. It can be said that one of the most similar living organisms to adapt behavior to the facade and skin of a building are plants. Because while they do not have much mobility, they have to manage their challenges such as receiving sunlight. By modeling plants, the challenges of using and protecting sunlight in the building can be managed. The method of collecting information and data from libraries and Internet sites and the research method is descriptive-analytical and simulation using simulation software and measuring its efficiency in controlling the entry of sunlight into the inside by climate analysis and light analysis software. By modeling the behavior of a special type of plant called Oxalis oregano and abstracting from it, a concept has been reached whose structural principles have been simulated by GrassHopper plugin in Rhino software 6. This module can be generalized on the facade and can control the amount of sunlight entering the building mass by opening and closing it. Transparent photovoltaic cells (TPV) are used in the body of the module, which in addition to providing energy for opening and closing the modules, does not impede visual vision. Examining the effect of the outer skin on the simulated space, it was found that these skins reduce the total heat load by 28%, reduce cooling load by 56% and the probability of glare from daylight by 23%. By modeling plants due to their static nature and adaptability to their surroundings, a mechanism in the building such as responsive skin can be achieved that control the impact of environmental variables such as sunlight into the building and thus provide visual comfort to residents in the glare of daylight reduced the use of building cooling energy. Manuscript profile
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  2 - Investigation of Silicon Nanowires Roles in Solar Cells
  Ali Mahmoudloo Seyyed Sadegh Gholami
  10.30495/jptc.2023.72104.1257
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  3 - A new design algorithm for modeling and comparative evaluation of compound regenerative fuel cell (RFC) systems
  Hossein Ghadamian Farideh Atabi Hassnali Ozgoli
  The results of calculation, modeling and engineering design of RFCs reveal that energy carrier change, from electrical to cold chemical combustion in the fuel cell section, is considered as an internal energy production and significantly increases the produced energy in More

  The results of calculation, modeling and engineering design of RFCs reveal that energy carrier change, from electrical to cold chemical combustion in the fuel cell section, is considered as an internal energy production and significantly increases the produced energy intensity rate and the performance coefficient of the system. By connecting photovoltaic system to electrolyze/fuel cell units and using the energy produced in photovoltaic section, the internal energy generation for a multiple case system with 1 kW capacity will be 2.302 kW, and the energy produced in the RFC complex will increase so that the efficiency of the total integrated system will be 29.45%. In this article, the general performance of the system and its related sub-systems together with capacity studies has been investigated. Then, using electrolyze formulation, fuel cell, and photovoltaic cells separately, modeling has been carried out with non-linear algorithms, and system integration has been done with GAMS software. Also, a step-by-step approach to the calculation and engineering design of the RFC is presented. Manuscript profile
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  4 - Literature Review carried out in the field of solar Air heater
  Ali Heydari mikaeel Forati
  To reduce energy sources, efforts are underway to optimize thermal processes around the world. Solar energy as an important source of renewable energy on Earth, with simple technology cause reduction in air pollution and saving the environment with less fossil fuels con More

  To reduce energy sources, efforts are underway to optimize thermal processes around the world. Solar energy as an important source of renewable energy on Earth, with simple technology cause reduction in air pollution and saving the environment with less fossil fuels consumption for the future. One application of the solar energy is solar air heaters which different design is done for different application. To ensure the performance of energy systems, analysis of first and second laws of thermodynamics can be more useful to analyze processes undertaken within the system. Exergy is considered as a key concept and it is a fundamental concept of accessible energy. Solar air heaters can be based on its performance cycle was divided into two categories: active and passive. In passive systems mainly based on the difference in specific gravity of air, naturally flow of warm and cold air is formed. But in activated systems a forced convective air flow is derived with external component like fan. Manuscript profile
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  5 - Increasing the Efficiency of Photovoltaic Systems by Using Maximum Power Point Tracking (MPPT)
  Alireza Tofigh Rihani Majid Ghandchi
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  6 - Analysis of Unbalanced Photovoltaic Systems Generation on Four-Wire Unbalance Distribution System of Shiraz
  Hossein Karimianfard Hossein Haghighat
  The use of distributed energy resources in power grids and in particular in the distribution system has gained noticeable popularity and growth in recent years. Given the increasing use of solar energy resources in low voltage grids, an appropriate strategy to coordinat More

  The use of distributed energy resources in power grids and in particular in the distribution system has gained noticeable popularity and growth in recent years. Given the increasing use of solar energy resources in low voltage grids, an appropriate strategy to coordinate and control these resources is necessary in order to reduce annual grid energy losses and improve grid voltage profiles. In this paper, the optimization and coordination of local photovoltaic resources in a four-wire unbalanced low voltage distribution network is proposed and investigated for a given time horizon. The simulation is performed on a part of Shiraz low voltage network. Two scenarios are investigated: in the first scenario balanced output of three phase energy resources which are dispersed and uncontrolled, is considered. In the second scenario a situation is analyzed in which the output levels of these resources are unbalanced. The effect of these two scenarios on the annual energy losses of the network in question is thoroughly examined and discussed Manuscript profile
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  7 - Design and Implementation of Soft Switching Three-port High Step-Up DC-DC Converter for Solar Energy Applications
  Somaye Gashtasebi Fariborz Haghighatdar Fesharaki Seyed Mohammad Mehdi Mirtalaei
  In recent few decades, due to various reasons, including energy crisis and environmental problems, renewable energy sources such as wind energy, solar systems and fuel cells have received much attention. Solar or photovoltaic systems are one of the most widely used rene More

  In recent few decades, due to various reasons, including energy crisis and environmental problems, renewable energy sources such as wind energy, solar systems and fuel cells have received much attention. Solar or photovoltaic systems are one of the most widely used renewable energy sources that have a low output voltage. For this reason, research on dc-dc converters has increased in recent years. In this paper, a non-isolated high voltage gain converter with three input-output ports is proposed. This converter provides two separate paths for power flow from each input source to the output load. In order to reduce the number of converter components, some components play multiple roles. Therefore, the energy storage device (battery) will charge with the same components used to transfer the power to the load. In this converter, to increase the voltage gain, the coupled inductor technique is used. Moreover, to reduce the leakage inductance as well as achieving the soft switching condition, two active clamps are used. Since the voltage across the switches is limited, the switches can be used with low voltage stress and thus low conduction losses. In this converter, the ripple of the input current will reduce by adding an inductor at its input. This has a significant impact on the performance and the lifespan of the solar cells. The various operational modes of the converter are discussed and the designing considerations are presented. A prototype of the proposed converter is simulated to supply a 130 W, 330 V load with a switching frequency of 50 kHz, in OrCAD software. Finally, a laboratory sample is implemented and the theoretical analysis are validated by the practical results.  Manuscript profile
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  8 - Modeling and Improvement of Function of Solar Resources using Comparative Multipurpose Algorithm of PSO
  Shahin Bazeghi Shahram Javadi Arsalan Hekmati
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