Homer software acts as a tool for modeling and optimizing an energy production system based on renewable technologies. The purpose of this study is to investigate the performance of different scenarios and optimize the best type of their use in accordance with the geographical data of the target area in the presence of different renewable sources of wind, solar and diesel generators in the presence of the main power grid. The necessity of using renewable resources is not hidden from anyone, but due to high fluctuations and dependence on weather conditions, these resources need to have a realistic analysis according to the conditions of each region in order to get the best performance from them. In this research, according to the meteorological data of the studied area, it has been tried to study the effect of using these resources in a microgrid optimally and objectively, and the calculations were done in such a way that the designed system can meet the load requirements of the studied area. To overcome the intermittency of renewable energy sources such as wind and sun, a combination of these sources was considered in a hybrid system. The data of solar radiation and wind speed required by the software were obtained from the meteorological website of the country and NASA and were used in the software. The results of the analysis of three scenarios including power grid/diesel generator, power grid/diesel generator/solar cell and power grid/diesel generator/solar cell/wind turbine show the prices of 0.579 dollars, 0.308 dollars and 0.431 dollars per kilowatt hour, respectively dollar showed. In these scenarios, the share of renewable energies was 0, 27.4 and 48.3 percent, respectively. The higher the price of diesel, the more the optimization software goes towards the use of renewable energies; Therefore, considering that the subsidy of energy carriers (fossil fuels) is high in our country, it is recommended that if this subsidy is reduced or allocated to the use of renewable energies, the use of renewable energies will increase. He will find that this issue will be very effective in reducing environmental pollution.

The writer of the present article studies the sources in which both Plato and Homer have been familiar with. He then concludes that both Homer and Plato are manifestations of one truth only. Homer is the symbol of myth, poetry and epic and Plato is the symbol of logos and reason. The writer then focuses on Homer and studies his position in Greek poetry. The writer finally presents the hidden aspects of Homer taken from Iliad and odyssey.

Equipping hospitals with emergency power supply is crucial. This is especially critical for important wards of the hospital, such as the NICU, ICU, and CCU. Due to the importance of this issue, the present study, for the first time, studies the power supply of vital devices of the neonatal ward in one of the hospitals in Iran. Techno-econo-enviro studies have been performed using Homer software on 20-year average data. The case study of this article is the Social Security Hospital in Farrokhshahr, located in the Chaharmahal and Bakhtiari province, Iran, where the system under study uses tree-shaped wind turbines, solar cells, diesel generators and batteries. The use of real data for the electrical consumption of the devices, use of wind and sun data in the form of 20-year averages, and use of up-to-date costs of equipment and consumed fuel, as well as the use of a new generation of the wind turbine, are the advantages of the present study. The results showed that the use of solar energy is superior to the use of wind energy, both economically and environmentally. The cheapest simulated system among 17640 possible scenarios, with the price of each kWh equal to 0. 636$, was able to use 18% of the solar energy. In contrast, the cheapest wind turbine-based system was able to use 10% of the wind energy, with the price of every kWh wind electricity equal to 0. 917$. The diesel generators are used in all optimal scenarios, which indicates that either the price of solar cells and wind electricity are high compared to the diesel generator, or the intensity of sunlight or wind speed are not high enough. Moreover, compared to the conventional system only consisting of diesel generator, the optimal scenarios of using solar cells and wind turbine, benefit from a reduction in produced pollutants equal to 4. 8 and 4 tones/yr, respectively. The authors hope the results of this study could help in providing a perspective for the Iranian energy policymakers.

Technical and executive problems available in the Iranian utility grid inhibit utilizing power at all times. Therefore, considering the importance of the applications of hospitals and medical service centers they should either use auxiliary and backup devices such as diesel generators and UPS, or renewable hybrid power systems. To this end, this paper conducted 3E analysis (energy-economic-environmental analysis) in a medical clinic of Mashhad using Homer software. The studied renewable hybrid system was an off-grid wind-solar system designed with a peak load of 5.3 kW to produce 19 kWh/day power. Adapting the data of a 20-year history of solar radiation and wind speed and use of the updated price of devices, updated price of fossil fuels and annual interest rate consistent with current economic conditions are other advantages of this work. The investigation of results indicates the superiority of solar potential to wind potential in the studied region. In addition, the configuration of the most economic scenario with minimum pollution emission was as follows: PV cells (4 kW), a diesel generator (4 kW), batteries (n=20) and inverter (4 kW). The minimum price for producing 1 kWh power is 0.721 $ and the minimum emitted CO2 is 1861 kg/year.

One of the most important indicators of sustainable rural development is energy supply. Therefore, the present work has been done with the aim of identifying the potential of wind, solar and fuel cell (FC) energy in the electricity supply of Tamin village located in Sistan and Baluchistan province by Homer 2.81 software. Different scenarios were investigated and diesel generators (DGs) and batteries were used as systems backup. The present work is the first renewable hybrid project based on a FC for a remote area in one of Iran's climates, and accurate and up-to-date technical, economic, energy and environmental analyzes have made the results very important. The results of the investigations showed that the DG-Wind turbine system is the cheapest system with the price of each kWh of electricity produced equal to $0.735. The FC-based system also significantly reduces production pollutants at a cost of $1.004 per kWh of electricity produced and uses 53% more renewable energy than the superior economic scenario. The production of hydrogen for use in a FC during the year is equal to 50.7 kg, and compared to the traditional system (DG only), the FC-based system has a payback time of 3.43 years.

This paper proposes a new method for sizing a residential on-grid PV battery systems based on peak of electricity grid. Nowadays PV battery systems are usually connected to the grid and renewable electricity generation considered as backup. Minimizing cost is one of the most important goals for this systems. For obtaining electricity demand a residential section simulated by Homer software. According to announced peak time of power gird, electricity demand in peak time is calculated. Maximum demand in peak time provides Battery and PV size. Since the electricity provides with this system is expensive using PV battery system is reasonable.

Revenge that is currently known as a type of moral abnormally and primitive justice is among dominant thoughts in epic works proposed in Iliad and Odysse of Homer as connection rings has changed the incidents into a logical and continuous format and has been deemed as a sacred issue in all three parts of Ferdowsi’ s masterpiece as follows: mythology, heroic, and historical. Since one of the best methods to recognize any issue is to compare it with a same level and same material issue, the present study aims at investigating the epic composing climates in Iran and Greece dealing with the comparison of revenge, different types of revenge, and incentives to form them within the intended epics to answer the following question: why revenge has been one of the principals in epic works and it has had a crucial role and has been deemed as a respectable issue? The research findings here that were achieved through a descriptive-analytic method showed that the sacred revenges in these works not only are not social revenges that have occurred in the absence of formal country legislation, in the form of retaliation and the punishment of the criminals, but also they have been considered as the primitive forms of punishment and public retribution. They are mostly found in masterpiece and the least appearance of this issue has been reported to occur in odyssey. Also due to their discipline and security, while preventing the corruption and insecurity in society, they have been the guarantors of the implementation of justice and the life of individuals.