نشریه انرژی ایران
سال پانزدهم شماره 3 (پیاپی 56، پاییز 1391)

In this paper، optimal design of hybrid solar-wind- diesel energy system with battery storage for reliable load in Arsoon village in Ardabil is presented. The village has 35 households that mean daily energy consumption is estimated 63. 4 KWh. In this design optimization is implemented، considering Loss of Power Supply Probability (LPSP) index for reliable load providing، with minimum total construction cost in the site that using a new evolutional algorithm based on، socio- political human behavior is used. The results for the cost of solar- diesel، wind - diesel and solar –wind – diesel systems are compared. In order to find out the least expenditure and best combination، the result of algorithm compared with HOMER software results.. Finally، power diagram of hybrid power system components and reliability diagram battery bank state of charge diagram) for solar- diesel، wind- diesel and solar-wind –diesel systems is presented. Finally the cost of fuel consumption using the hybrid system and diesel system is present.

A hybrid hydro/wind/photovoltaic base on hydrogen storage system is designed to supply power demand of pump stations. The aim of this design is minimization of net present cost of the hybrid system. Optimization problem is subject to reliable supply of the demand. The system is investigated in the north west of Iran (Meshkinshahr) and the local data is applied. About 12 pump stations are found in the Sabalan dam and far remote areas، which makes the task of their electrification via grid system very difficult. The hydro potentials are analyzed with the help of GIS data of Iran. Meteorological data from renewable energy organization (SUNA) of Iran and other sources، such as NASA، is used for the estimation of solar and wind energy potentials. In this paper، hydro/PV/wind/ fuel cell hybrid system is compared with above system without hydro unit. An advanced variation of Artificial Bee Colony algorithm (ABC) and HOMER optimization software is used to solve the optimization problem. The algorithm developed is compared with HOMER software and the results show that ABC algorithm accuracy is better than HOMER software. Result reveals the impact of components outages on the reliability and cost of the system، so they are directly dependent on component’s reliabilities، i. e. Outages result in need for a larger generating system for supplying the load with the acceptable reliability. Different system types and their component sizes are identified having a cost of energy less than 0. 3 $/KWh.

Difference in salt concentration between the different parts of the marine engender causes the currents marine. The flow is the counter- clockwise in the Persian Gulf with average flow speed is 0. 5 [m/s]. It flows to the Persian Gulf through the Strait of Hormuz and traverse the first of Iranian coast then the Arabic coast. Khoran Strait is between the Iranian Plateau and the Qeshm island. It’s Strait is narrow and very long and the tide impressing of the currents marine on strait. By tidal the currents marine speed 2 [m/s] and thus it the flow can extracting energy and production of electricity. In this paper، has been investigated tidal energy potential and hydrodynamic Qeshm Strait and thus designed an the converter device for currents marine energy with efficiency of 30%. It the device can doubling speed of flow and can production of electricity with a capacity 1. 1 Kw.

Sustainable energy means use of resources in a manner that provides ongoing energy to meet the needs of the current population، with compromising conditions for future generations. Renewable energy including solar، wind، hydropower، wave and tidal، biomass and geothermal will play a role in this regard. Use of renewable energy offers numerous benefits in the short-، medium- and long-term: security of supply، sustainable local industry، job growth and environmental sustainability. Renewable energys with the capability of creating job opportunities and income، causes the empowerment and strengthening self-reliance of local communities and contributes to poverty alleviation goals. The use of renewable energys technologies and markets development requires removing financial، legal، regulatory and organizational barriers. Planning roadmap for renewable energy development under a three phase approach، use of encouraging policy incentives، competition improvement and market space deregulation with considerable increase in activities scale will affect on renewable energy development، propotional with sustainable economic، social and environmental development.

This paper addresses the design and development procedure of a simulator for Shiraz 250kw solar power plant based on hybrid modeling. Therefore، the different parts of the process which influence the control performance were modeled in MATLAB software environment. The hybrid approach is applied to realize this model. Accordingly، we use predefined static and dynamic equations to model related parts respectively. Thereafter the effects of the other parts are evaluated based on a fuzzy modeling using a correction factor. Meanwhile the proposed model is validated using real data from Shiraz solar power plant and based on the RMSE and normalized RMSE indexes.

Planting in non-productive lands is one of the attractive methods for bio-energy generation. In contrast to conventional fossil fuels combustions، these types of resources dispose exactly the same amount of carbon that stored during their life. Consequently، they are carbon-neutral. After a wide-ranging review of the literature in this study، a comprehensive examination of country''s potentials relating to energy forests’ development is done. Some of the most significant aspects like climate، technology and economic characteristics of energy forests’ implementation in the context of Iran are focused and at last، the levelized electricity cost of power generation from forest products is derived. This value for a 50 MW power plant is in the range of 15. 1 to 16. 2.

The main purpose of this survey was to identify inhibiting factors of application development of renewable energies in smallholder farming systems of the Tafresh township. A descriptive- survey method was used for collecting the data. The statistical population of the study consisted of 2470 small farmers working in the smallholder farming systems of the area، in which 300 people were selected as sample using Krejcie & Morgan table and stratified random sampling technique. A questionnaire was used to collect the data. A panel of experts confirmed the validity of the questionnaire. A pilot study was conducted to establish reliability of the instrument. Cronbach alpha''s coefficient for the mail scales of the questionnaire was higher than 0. 75. The results of factor analysis showed that five factors، namely، spatial- qualitative، personal characteristics، lack of advantage، knowledge- financial and technological explain 43. 69 percent of total variances of inhibiting factors of application development of renewable energies in smallholder farming systems of the Tafresh township.