Papers by Keyword: Power Generation

Abstract: Photovoltaic (PV) systems have gained significant attention as a viable and sustainable source of electricity generation. This paper provides an examination of the efficiency of four PV systems installed across the South West and West regions of Romania, exploring the underlying mechanisms, influencing factors, and strategies for optimization. The solar data and the power generated by the PV systems are systematically collected and analysed. High PV system efficiency has several significant environmental and economic benefits: reduced greenhouse gas emissions, energy independence, cost savings and job creation. The aim is to contribute to the understanding and advancement of PV technology for a cleaner and more sustainable energy future.

Abstract: The forecast for electrical energy demands in the South Sulawesi area in 2060 is 198,353 GWh, so the electricity generation capacity required under the Business As Usual scenario is 38.68 GW in that year. If this demand is connected to the scenario of limiting the construction and operation of coal-fired power plants, then the capacity required is 41.02 GW. This article provides an overview of the value of electrical energy demand and generating capacity in South Sulawesi where the method used to plan additional electricity generating capacity is based on the OSeMOSYS model. The generating capacity of the analysis results comes from various types of power plants, namely: conventional types (combine cycle power plant, gas turbine power plant, gas engine power plant, coal-fired power plant, and diesel power plant), and Renewable Energy types (hydropower plant, mini hydro power plant, biomass power plant, waste-to-energy power plant, geothermal power plant, wind turbine power plant, and photovoltaic power plant). The primary energy used by these power plants comes from the South Sulawesi area and from outside South Sulawesi. Specifically, renewable energy is the potential of the South Sulawesi region.

Abstract: In this manuscript, a new concept of power generation from thermoelectric generators TEGs using the sun irradiation and two oil tanks, one hot and one cold, is proposed. It consists of two oil tanks separated by a plate covering several TEGs in series. The oil tank at the bottom of the system constitutes a cold convection condition for the TEGs plate; on the other hand, the upper oil tank accounts for a hot convection condition since its upper surface is transparent and therefore subjected to the sun irradiation that will heat up the oil. To test the feasibility of this concept, an appropriate thermal modeling is developed and associated parametric analysis was carried out. It shows that powers up to 242 W can be generated with a system having a hot oil tank height of 0.2 m along with a width and length of 2 m each.

Abstract: Even though dates are produced in large scales in Saudi Arabia, it is not the only product palm trees can offer. Transformative products of palm trees that can be beneficial for the community are intense. For instance, using fronds waste as a biomass to generate power at remote areas or central cities where palm trees population is intense might be a transformative product of palm trees. Using natural waste as a supplement source of electricity at the communities living near palm farms will have a profound effect on the environment and economy. This paper discusses the feasibility of using palm trees' fronds as a biomass in Saudi Arabia. It complies with the kingdom's strategic power plan where alternative power sources are encouraged in the vision 2030. This paper briefly illustrates the opportunity of using biomass, statistics of palm trees in Saudi and the use of biomass as a feedstock to generate electricity in Medina region as a case study.

Abstract: Electricity industry is one of the most important industries that contributes to Thailand’s economic growth. Power generation requires a huge amount of energy and emits a great number of greenhouse gas emission. Reducing energy consumption by improving its efficiency will be beneficial in both economic and environmental aspect. In this study, ten measures related to power generation and distribution system were assessed and analyzed its emission reduction via clean development mechanism and evaluated its cost effectiveness by using the net present value method. The findings revealed that changing a burner with better efficiency was the best implemented measure providing a great point not only on total energy saving but also on gross emission reduction and on earning back the investment. The results in term of intensity of energy saving and emission reduction, however, demonstrated that replacing an old transformer with a new high efficiency one was the most effective measure because using it for a long time period results in high value of no load loss. The information regarding the potential of greenhouse gas emission reduction on the energy efficiency improvement of each measure would be a useful information for decision makers or other parties in power sector to understanding and planning the suitable strategies in the future.

Abstract: This paper is regarding the reduction in the cost of electricity generation. This is achieved by using the proposed new mechanics/mechanism/machines as an intermediate, in the process of converting the source energy (Both Conventional Sources of Energy and Non-Conventional Sources of Energy, mainly solar energy and thermal energy from waste or the electricity itself) to electrical energy at truncated charge.

Abstract: A solar chimney power plant is a simple solar thermal power plant that is capable of converting solar energy to thermal energy in the solar collectors. Then, the generated thermal energy is converted to kinetic energy in the chimney and ultimately to electric energy via a wind turbine and a generator. The purpose of this study is to evaluate the performance of the solar chimney power plant in Nakhon Ratchasima, Thailand in terms of estimateion for the electric energy output. A mathematical model based on the energy balance was developed to estimate the power output of solar chimneys as well as to examine the effect of various ambient conditions and structural dimensions on the power generation. It was found that, the wind speed inside chimney reaches more than 2 times of the value of free wind speed outside the chimney. The solar chimney power plant with 10 m chimney height and 4 m chimney diameter is capable of yearly producing between 1,779-3,647 W and the performance of solar chimney in the range of 9-18% respectively. The highest performance of solar chimney (18%) was appeared in April. It can save the use of conventional sources of energy like oil and natural gas.

Abstract: As Thailand is importantly an agricultural country driving the bio-ethanol production from agricultural feedstock via fermentation process and a solid oxide fuel cell (SOFC) has been known as an attractive energy conversion device due to its high efficiency and fuel flexibility, SOFC fueled by ethanol for electrical power generation has been performed. Hydrogen-rich gas from ethanol steam reforming is used as fuel carrier converting to generate electrical energy in SOFC. This paper presents an energy analysis of integrated steam reformer and SOFC system to determine the suitable ethanol concentration giving the optimum SOFC electrical efficiency. In this study, the ethanol concentrations between 20 and 56 %wt corresponding to water-to-ethanol ratios from 10 to 2 were varied at a fixed feed flow rate of 1 g/s of ethanol solution for hydrogen production. The SOFC power efficiency increased although the amount of hydrogen and SOFC electrical power decreased with decreasing the ethanol concentration. However, for the first law analysis, the heat load of each unit was calculated and it can be concluded that the overall system efficiency increased with increasing the ethanol concentration.

Abstract: In many countries fossil fuels are used as the main source to generate electricity, but due to the increase in energy consumption and the rapid depletion of the fossil fuel resources, the demand of alternate energy sources such as solar, wind or hydro power becomes high [1]. In this paper wind energy as an alternate energy resource for electric power generation is proposed in the form of a small wind farm for grid-connected application in Perlis Malaysia. The monthly wind speed data of Perlis which is the smallest state of Malaysia were measured and the wind mill parameters such as Air Density, Blade Length, Power Coefficient and Blade Length were calculated. The mechanical output power of the proposed wind turbine form is calculated to check out its performance and reliability. The results showed that the proposed wind energy power generating system is a good choice and can be implemented in Malaysia to provide enough power for small towns and rural areas.

Abstract: In Japan, a policy mechanism called the "Feed-in Tariff (FIT)," which was designed to accelerate investment in renewable energy technologies, was introduced in July 2012. However, thus far, only solar power has been introduced, whereas other renewable energy options such as wind, geothermal or biomass have only made small progress; although, wind power, especially, has been found to have a very large potential for providing electricity in Japan. In addition, the price of electricity will essentially increase as a result of the FIT scheme. This indicates that the FIT may not always be a good option for accelerating the use of renewable energies. This study intends to analyze the effectiveness of the FIT mechanism in Japan and to propose another way to introduce renewable energies through the use of the concept of "marginal cost of power facility." The basic idea of this concept is that the financial resource of a subsidy for renewable energy is neither a tax nor an increase in the price of electricity, but is actually money saved on imported fossil fuels through the utilization of renewable energy.