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Performance Optimization and Modelization of a Photovoltaic Pumping System
Mohamed El Mamy Mohamed Mahmoud,
Jeyid Yacoub El Moubarrack,
Chighali Ehssein,
Ahmed Mohamed Yahya,
Abdel Kader Mahmoud,
Issakha Youm
Issue:
Volume 7, Issue 1, March 2019
Pages:
1-7
Received:
16 February 2019
Accepted:
28 March 2019
Published:
23 May 2019
Abstract: The photovoltaic (PV) pumping system is a widely used application in Mauritania to ensure the water supply in rural area for populations needs. The system is composed of a PV generator, a DC/DC converter, a DC/AC inverter, a BLDC motor and a centrifugal pump. Study in this article we study with simulation in Matlab/ Simulink environment the performances of the PV pumping system taking into account the climate parameters (solar irradiance, and ambient temperature), and the effect of the total manometric head (HMT) on the pumped flow rate. In addition it also counted the electrical energy and flow rate of the each climatic parameter. Two mathematical motor –pump models for PV application, were proposed in this article to contribute in the studies of PV pumping sizing. These models link directly the operating current to the voltage and electrical power to the flow rate of the pump versus total head.
Abstract: The photovoltaic (PV) pumping system is a widely used application in Mauritania to ensure the water supply in rural area for populations needs. The system is composed of a PV generator, a DC/DC converter, a DC/AC inverter, a BLDC motor and a centrifugal pump. Study in this article we study with simulation in Matlab/ Simulink environment the perform...
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Study and Design of an Application for Measuring the Harmful Character of Computer Equipment and Telecommunications
Ayaovi Agbétoméfa Kpeto,
Eyouléki Tcheyi Gnadi Palanga,
Koffi Sagna,
Komi Apélété Amou,
Koffi-Sa Bédja
Issue:
Volume 7, Issue 1, March 2019
Pages:
8-14
Received:
31 July 2018
Accepted:
14 August 2018
Published:
7 April 2019
Abstract: The office electrical, computer or telecom equipment we use on a daily basis emits electromagnetic waves. These waves would have long-term and short-term effects on the human body. Since the direct proofs of cause and effect are still insufficient, a measurement study will be made of these materials in order to know the value of the magnetic field that each of them emits. A discussion of these values against standards’ will lead to the design of a NOCIONDE (application revealing HARMfulness of the WAVEs if it exists). Based on the precautionary principle, NOCIONDE is a web application or a tool for measuring the harmful nature of materials that offers recommendations to users to follow so that they will not be victimized one day if the evidence proves to be true. The aim of this study is to show the harmful character of computer equipment and telecommunications trough the measuring of the electromagnetic field values compared to the standard required by the World Health Organization. The materials’ classification is obtained. In addition, the results of NOCIONDE reveal clearly that the provisions concerning the telephone and other equipment emitting radio waves should be respected.
Abstract: The office electrical, computer or telecom equipment we use on a daily basis emits electromagnetic waves. These waves would have long-term and short-term effects on the human body. Since the direct proofs of cause and effect are still insufficient, a measurement study will be made of these materials in order to know the value of the magnetic field ...
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An Optimal CO2 Saving Dispatch Model for Wholesale Electricity Market Concerning Emissions Trade
Issue:
Volume 7, Issue 1, March 2019
Pages:
15-27
Received:
21 April 2019
Accepted:
29 May 2019
Published:
12 June 2019
Abstract: Deep CO2 mitigation provides a challenge to fossil fuel-fired power industry in liberalized electricity market process. To motivate generator to carry out mitigation action, this article proposed a novel dispatch model for wholesale electricity market under consideration of CO2 emission trade. It couples carbon market with electricity market and utilizes a price-quantity uncorrelated auction way to operate both CO2 allowances and power energy trade. Specifically, this CO2 saving dispatch model works as a dynamic process of, (i) electricity and environment regulators coordinately issue regulatory information; (ii) initial CO2 allowances allocation through carbon market auction; (iii) load demands allocation through wholesale market auction; and (iv) CO2 allowances submarket transaction. This article builds two stochastic mathematical programmings to explore generator’s auction decision in both carbon market and wholesale market, which provides its optimal price-quantity bid curve for CO2 allowances and power energy in each market. Through piece-wise adding up individual demand curve (supply curve) and matching with total supplied allowances (load demanded), market equilibrium is reached. Under this dispatch model, price upper-bound of bid allowances of generators is upward ordered and price lower-bound of bid electricity is downward ordered, according to their operational advantage from weak to strong. Meanwhile their bid electricity upper-bound gets respective capacity constraint or market share regulation. These features imply that the proposed model can prompt economic dispatch, improve resources allocation efficiency and bring about CO2 mitigation effect. Numerical simulations also verified the validity of this CO2 saving dispatch model.
Abstract: Deep CO2 mitigation provides a challenge to fossil fuel-fired power industry in liberalized electricity market process. To motivate generator to carry out mitigation action, this article proposed a novel dispatch model for wholesale electricity market under consideration of CO2 emission trade. It couples carbon market with electricity market and ut...
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Bahir Dar City Municipal Solid Waste Potential Assessment for Clean Energy
Molla Asmare,
Belachew Alelign
Issue:
Volume 7, Issue 1, March 2019
Pages:
28-38
Received:
26 April 2019
Accepted:
28 May 2019
Published:
12 June 2019
Abstract: Nowadays, Carbon-rich fuels are the principal energy supply utilized for powering human society, and it will be continued for the next some decades. Connecting with this, modern energy technologies are very essential to convert the available limited carbon-rich fuels and other green alternative energies into useful energy efficiently with an insignificant environmental impression. Therefore, the main objectives of this study are assessing the potential of municipal biomass solid waste for briquette production in Bahir Dar city, Ethiopia. To conduct this research, various data collection instrument tools were used to achieve the intended objectives for instance questionnaire, direct measurement, field observation and related literature based on necessity. Moreover, to confirm the reliability of the information obtained through a questionnaire, a focus group discussion was conducted with different concerned bodies. The main finding of this study shows that Bahir Dar city has the potential to generate 50.19 tons of municipal biomass solid waste per day. The collected waste was characterized as 82.5% of them is organic waste that may be converted in to clean energy (briquette and biogas) based on their sized whereas the remaining 17.5% of them were inorganic (plastics, glass, and metals) that can be resent for recycling and reuse to their original sources. Biomass-related solid municipal waste is a promising potential to utilize as a feedstock for briquette production. Besides, it has a prodigious role to reduce deforestation, land degradation, save foreign currency and reduce greenhouse gas emissions. This is because the demands of household’s energy that was fulfilled with wood charcoals and fossil fuels are substituted with locally available renewable energy sources. The experimental results confirmed that all the physicochemical properties of briquette charcoal that are produced from municipal solid biomass waste were acceptable. Besides, the burning efficiency of the briquette, fanning time and carbon content determination were measured and obtained as adequate results based on the standards. Hence, it will be a possible alternative fuel for household energy using a special design stove that is available in the market. It has also played a great role in waste management and treatment system to achieve sustainable clean city developments.
Abstract: Nowadays, Carbon-rich fuels are the principal energy supply utilized for powering human society, and it will be continued for the next some decades. Connecting with this, modern energy technologies are very essential to convert the available limited carbon-rich fuels and other green alternative energies into useful energy efficiently with an insign...
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Study on Technological Parameters of Pilot Production of Ethanol
Zhengheng Huang,
Yingjun Xie,
Fang Yin,
Wudi Zhang,
Jing Liu
Issue:
Volume 7, Issue 1, March 2019
Pages:
39-44
Received:
27 April 2019
Published:
15 June 2019
Abstract: Cassava and corn are the two main ingredients in the process of producing fuel ethanol. This paper is mainly based on experiments. In this experiment, the traditional ethanol fermentation with cassava and corn as raw materials was compared with the the industrial ethanol fermentation with the same raw material, and the technological parameters of ethanol fermentation in traditional ethanol fermentation and industrial ethanol fermentation were compared and studied. The traditional double enzyme method was used for ethanol fermentation. Liquefaction temperature (70 plus or minus 1)°C, Saccharification temperature (60 plus or minus 1)°C, Fermentation temperature (30 plus or minus 1)°C. Experimental results show that: The average alcoholic production rate of corn was 36.64% and the average alcoholic production rate of cassava was 42.46% in the traditional ethanol fermentation, the average alcoholic production rate of corn was 38.22% and the average alcoholic production rate of cassava was 44.76% in the industrial ethanol fermentation. The industrial ethanol fermentation experiment is better than the traditional ethanol fermentation by comparison, because the former has better sealed anaerobic environment and greater capacity. It is suitable for large-scale production parameter study, in order to obtain higher utilization rate of raw materials, it shows a higher rate of alcohol production.
Abstract: Cassava and corn are the two main ingredients in the process of producing fuel ethanol. This paper is mainly based on experiments. In this experiment, the traditional ethanol fermentation with cassava and corn as raw materials was compared with the the industrial ethanol fermentation with the same raw material, and the technological parameters of e...
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