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2023 8th International Engineering Conference on Renewable Energy & Sustainability (ieCRES)最新文献

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The Effect of Green Roofs-Types on the Design of Energy-Efficient Buildings in Gaza Strip: A Co-simulation Parametric Study. 绿色屋顶类型对加沙地带节能建筑设计的影响:联合模拟参数研究。
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209470
Sanaa Y. Saleh, Ola. G. Alfarra
The building’s roof, which has low thermal conductivity, is a significant contributor to meet the requirements of energy-efficient buildings in various climatic conditions. In a bid to mitigate energy consumption and achieve thermal comfort, several countermeasures have been suggested. Green and thermally insulated roofs are presented in this paper. Experimental research and numerical simulation analysis applied to a school building in Gaza Strip. This research is the first of its kind in this geographical area. The experiment using design builder 6.1.0.006 software is conducted to compare four types of roofs (a traditional roof, a traditional roof with thermal insulation, a green roof, and a green roof with thermal insulation) during all seasons of the year (hot-humid summer, cool winter, and equinoxes). The research aimed to determine which of the roofs would give more thermal comfort. Essential parameters of green roofs, such as leaf area index (LAI) and soil depth, are also set at different values to determine their effects. It is found that the thermal performance of green roof with thermal insulation is the best throughout the year, as it offers the best PMV values. In addition, higher LAI is the key to maximize energy savings in hot humid season but it increases energy consumption in cold seasons, and higher soil depth is the solution to reduce energy consumption in the cold season, but it has a negative effect in hot and warm seasons.
建筑的屋顶具有低导热性,是满足各种气候条件下节能建筑要求的重要贡献者。为了减少能源消耗和实现热舒适,提出了一些对策。本文介绍了绿色和隔热屋顶。加沙地带某学校建筑的实验研究与数值模拟分析。这项研究在这个地理区域尚属首次。利用design builder 6.1.0.006软件对一年四季(夏季湿热、冬季凉爽、春分)的四种屋顶类型(传统屋顶、传统屋顶保温、绿色屋顶、绿色屋顶保温)进行对比试验。这项研究旨在确定哪种屋顶能提供更多的热舒适。绿化屋顶的基本参数,如叶面积指数(LAI)和土壤深度,也设置为不同的值,以确定其效果。研究发现,绿色绝热屋顶全年的热工性能最好,其PMV值最好。此外,较高的LAI是湿热季节最大限度节能的关键,但会增加寒冷季节的能耗;较高的土壤深度是降低寒冷季节能耗的解决方案,但在炎热和温暖季节会产生负面影响。
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引用次数: 0
Fuzzy Controller for a Unity-Power Factor Boost Converter in Three-Phase Induction Motor Drives Applications 三相感应电动机驱动中单位功率因数升压变换器的模糊控制器
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209432
H. Awad, Gculisiwe Magagula, Y. Nassar, H. El-khozondar, E. Bayoumi
The unity power factor is attained when both the displacement and distortion factors are unity by having a sinusoidal current waveform that is in phase with the line voltage. This paper proposes using Fuzzy Logic Controllers (FLC) to achieve a unity power factor in three-phase induction motor drive applications. Cascade controller loops are used to monitor and control the converter current and the voltage. The proposed control technique is evaluated under different operational conditions, where the dc converter voltage and load are varied. The simulation results show that the unity power factor operation of the boost converter for the induction motor has a fast response and good dynamic performance.
当位移和畸变因子都一致时,通过具有与线路电压相一致的正弦电流波形,可以获得统一的功率因数。本文提出采用模糊逻辑控制器(FLC)实现三相异步电动机驱动的统一功率因数。串级控制器回路用于监测和控制变换器的电流和电压。在直流变换器电压和负载变化的不同运行条件下,对所提出的控制技术进行了评估。仿真结果表明,异步电动机升压变换器的单位功率因数运行具有响应快、动态性能好等优点。
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引用次数: 0
Linear Fresnel collector (LFC) for enhancing solar water desalination process 用于加强太阳能海水淡化过程的线性菲涅耳集热器
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209535
H. El-khozondar, M. Elnaggar, M. Elnaggar, A. O. Ellouh, M. W. Alghaffari, Hamza Bassam Nassar, M. Alnahhal
The limited availability of clean water resources in Gaza Strip is due to the increasing salinity of groundwater, which is due to unbalanced consumption. Furthermore, the increase in the poverty level among the people and the lack of fossil fuel resources, and the high intensity of solar radiation in the strip have grabbed the attention of the authors to think about a suitable alternative to produce potable water via solar energy. This study aims to investigate the linear Fresnel collector (LFC) coupled with a solar still-single effect active system. The solar still was designed to match the LFC output to avoid any heat losses that may decrease the system’s effectiveness. A CFD simulation was carried out using Ansys Fluent software to predict temperature and pressure distributions to find out the efficiency of the LFC collector. The results showed that the use of LFC leads to an increase in the efficiency of the solar still, and the daily production of distilled water reaches 1.5 $mathrm{Litre}/mathrm{m}^{2}$.
加沙地带清洁水资源的供应有限,其原因是地下水含盐量增加,而这是由于消耗不平衡造成的。此外,贫困人口的增加和化石燃料资源的缺乏,以及该地区高强度的太阳辐射引起了作者的注意,他们开始考虑利用太阳能生产饮用水的合适替代方案。本研究旨在研究与太阳静止单效应有源系统耦合的线性菲涅耳集热器(LFC)。太阳能蒸馏器的设计与LFC输出相匹配,以避免任何可能降低系统效率的热损失。利用Ansys Fluent软件对LFC集热器的温度和压力分布进行CFD模拟,以确定LFC集热器的效率。结果表明,LFC的使用提高了太阳能蒸馏器的效率,蒸馏水日产量达到1.5 $ mathm {Litre}/ mathm {m}^{2}$。
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引用次数: 0
Wind Energy Prospects And The Future of Bangladesh Power Sector 风能前景和孟加拉国电力部门的未来
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209532
A. Noman
Bangladesh has had serious electrical issues due to the fast depletion of petroleum reserves over the past several years. Bangladesh ought to look at additional sources of energy. The wind has the capability to resolve the problem. A fantastic and cost-free source of renewable energy is the wind. Bangladesh has a lengthy coastline where there is consistent wind throughout the year. It requires numerous trends throughout the year. The various areas of Bangladesh’s wind flow rates are studied statistically in this study. It is demonstrated that approximately BDT 11 is required per kWh of electricity generation, albeit this number will decrease for the long-run projects after calculating the expense of installing and executing wind power plants. The price contrast is explored in relation to the price of producing power in Bangladesh from various sources. Additionally, the viability of building up wind turbines in Bangladesh is investigated as well.
由于过去几年石油储量的迅速枯竭,孟加拉国出现了严重的电力问题。孟加拉国应该考虑其他能源来源。风有能力解决这个问题。风能是一种神奇而又免费的可再生能源。孟加拉国的海岸线很长,全年都有风。它需要全年的许多趋势。本研究统计研究了孟加拉国不同地区的风流率。这表明,每千瓦时发电大约需要11比特币,尽管在计算安装和执行风力发电厂的费用后,这个数字将减少长期项目。价格对比探讨了在孟加拉国从各种来源生产电力的价格。此外,在孟加拉国建立风力涡轮机的可行性也进行了调查。
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引用次数: 0
Design of a solar thermal powered system for electricity generation and water desalination 太阳能热发电和海水淡化系统的设计
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209513
M. Elnaggar, H. El-khozondar, Y. Nassar, M. W. Alghaffari, A. O. Ellouh, Mohammed I. Habib, Atwah M. Alshafei, Mohammed K. Khalifa
The limited availability of clean water resources in Gaza strip referred to the increase of the salinity of groundwater due to pumping and unbalanced consumption, the severe shortage of electricity. Thus, the proposed work is to use solar energy to generate electricity and distilled water for drinking or agricultural improvement. System was designed from parabolic solar trough and coupled with a steam turbine with a dc generator and custom designed distillation device (solar still-single effect active system). The incoming solar radiation from the sun is focused and concentrated onto a receiver pipe using a parabolic trough, heating the incoming water, then the pure water turns into high pressure steam, the steam with high energy flows and hits the impulse turbine via nozzle, turbine convert potential energy to kinetic energy for generating electricity by DC Generator, then the exhaust steam with low energy that remaining after the turbine is take place at heat exchanging process in the solar still for increasing impure water temp. to make evaporation process as quick as possible, that’s guarantee process efficiency, ultimately, the steam after H.E get back liquid and return to the water source as a close cycle system.
加沙地带的清洁水资源有限,指的是由于抽水和不平衡的消费导致地下水含盐量增加,电力严重短缺。因此,建议的工作是利用太阳能发电和蒸馏水用于饮用或农业改良。系统采用抛物面太阳能槽设计,并与汽轮机、直流发电机和定制蒸馏装置相结合(太阳能静止单效有源系统)。来自太阳的入射太阳辐射经抛物线槽聚焦集中到接收管上,加热入射水,纯水变成高压蒸汽,高能量蒸汽流动,通过喷嘴撞击冲击式水轮机,水轮机将势能转化为动能,由直流发电机发电。然后将涡轮后剩余的低能量的排汽在太阳能蒸馏器中进行换热过程,以提高不纯水温度,使蒸发过程尽可能快,保证过程效率,最终使蒸汽在h - e后回液返回水源,形成一个封闭的循环系统。
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引用次数: 0
Modeling and Control of a half Car Active Suspension System using Sliding Mode Controller and Linear Quadratic Regulator Controller 基于滑模控制器和线性二次型调节器的半车主动悬架系统建模与控制
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209435
A. Ahmed, Hisham.F. A. Ramadhan, Mohamed El Malki, Y. Nassar
This paper illustrates the use of two distinct control strategies. Namely, the Sliding Mode Control (SMC) and a Linear Quadratic Regulator (LQR) controller to monitor and handle the suspension system vibrations that occurred. We used a half car suspension model with (4DOF). The necessary suspension performance attributes, such as ride comfort, suspension deflection and car handling require a comprehensive control system. Three components make up this control system, which is carried out using the MATLAB application: the controller, the suspension system model, and input signals (road profile and actuator force). A comparison of the half car active suspension system LQR and SMC controllers as well as the uncontrolled suspension system is presented.
本文说明了两种不同控制策略的使用。即,滑模控制(SMC)和线性二次调节器(LQR)控制器来监测和处理悬架系统发生的振动。我们使用了半汽车悬架模型(4DOF)。必要的悬架性能属性,如乘坐舒适性,悬架偏转和汽车操纵需要一个全面的控制系统。该控制系统由三部分组成,通过MATLAB应用程序实现:控制器、悬架系统模型和输入信号(道路轮廓和执行器力)。对半车主动悬架系统的LQR控制器和SMC控制器以及非受控悬架系统进行了比较。
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引用次数: 0
Estimation of Co2 emission factor for Power Industry Sector in Libya 利比亚电力工业部门二氧化碳排放系数估算
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209528
Ahmed A. Makhzom, Abdallah M. Eshdok, Y. Nassar, Samer Alsadi, Tareq Foqha, M. Salem, I. AlShareef, H. El-khozondar
This study is relevant to the efforts being made to support the Libyan state achieve its goal of reducing greenhouse gas emissions since Libya is one of the countries that ratified the Paris Agreement of 2015 and participated in the COP27 conference. Therefore, this research aims to estimate the amounts of Co2 emitted from Libyan power industry sector. The results presented in this research is based on real measured data that had been collected over long periods of time series by monitoring and control systems of the considered power plants. Thus, the presented here Co2 emission factors on different basis can be considered as an indicator to the environmental situation of the power industry sector of Libyan State. The methodology used in this study can be adopted to estimate other air pollutions emission factors in the power sector or even in other sectors. The results were also compared with emission inventories published by environmental agencies such as IPCC, EAA, EAI, and EEM, as well as the standards set by UNFCCC. This research sounds the alarm that the current environmental situation of the stations is much worse than all expectations, and therefore scientists and decision-makers must take immediate measures to reduce pollution in this sector.
这项研究与支持利比亚国家实现其减少温室气体排放目标的努力有关,因为利比亚是批准2015年《巴黎协定》并参加COP27会议的国家之一。因此,本研究旨在估计利比亚电力工业部门的二氧化碳排放量。本研究中提出的结果是基于实际测量数据,这些数据是由所考虑的发电厂的监测和控制系统在长时间序列中收集的。因此,本文给出的不同基础上的Co2排放因子可以作为利比亚国家电力工业部门环境状况的一个指标。本研究所采用的方法可用于估计电力行业甚至其他行业的其他空气污染排放因子。结果还与IPCC、EAA、EAI、EEM等环境机构发布的排放清单以及UNFCCC制定的标准进行了比较。这项研究敲响了警钟,目前的环境状况比所有人的预期都要糟糕得多,因此科学家和决策者必须立即采取措施减少这一领域的污染。
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引用次数: 2
Efficiency improvement of Ag-doped CdSe quantum dot sensitized solar cells 掺银CdSe量子点敏化太阳能电池效率的提高
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209498
R. El-Khozondar, H. El-khozondar, Y. Nassar, E. Bayoumi, Hilmy Awad
Nanoparticle doped Quantum dots are novel materials which play an essential role on enhancing Solar cells efficiency. The focus of this work is on investigating the effect of adding CdS quantum dots doped with Ag nanoparticles layer into the solar cell structure. Then, comparison will be made between the performance of Ag doped CdS quantum dots doped and undoped CdSe quantum dots solar cells. The proposed solar cell structure comprises $mathrm{F}mathrm{T}mathrm{O}/mathrm{T}mathrm{i}mathrm{O}_{2}/mathrm{A}mathrm{g}$-doped $mathrm{C}mathrm{d}mathrm{S}$ quantum dots/Iodide-Triiodide $(mathrm{I}^{-}/mathrm{I}^{-3})/$Platinum. The transmittance, reflectance and absorbance power are analytically studied using transverse matrix method and numerically calculated using Maple. The transmittance, reflectance and absorbance power is studied for different fractions of Ag nanoparticle and different CdSe quantum dots concentrations. Results show that the absorbance power increases as the fraction of Ag nanoparticles increases. In particular, there is a clear peak around 700 nm. However, absorbance hardly changes as quantum dots fraction changes. Thus, we recommend our study to be considered to improve the performance of solar cell.
纳米粒子掺杂量子点是提高太阳能电池效率的一种新型材料。本工作的重点是研究在太阳能电池结构中加入掺杂银纳米粒子层的CdS量子点的效果。然后,比较掺银CdS量子点与未掺杂CdSe量子点太阳能电池的性能。所提出的太阳能电池结构包括$ matthrm {F} matthrm {T} matthrm {O}/ matthrm {T} matthrm {i} matthrm {O}_{2}/ matthrm {A} matthrm {g}$掺杂$ matthrm {C} matthrm {d} matthrm {S}$量子点/碘化物-三碘化物$( matthrm {i} ^{-}/ matthrm {i} ^{-3})/$铂。利用横向矩阵法对透光率、反射率和吸光度进行了解析研究,并用Maple软件进行了数值计算。研究了不同组分银纳米粒子和不同浓度镉硒量子点的透射率、反射率和吸光度。结果表明,随着银纳米颗粒含量的增加,吸光度增大。特别是在700 nm附近有一个明显的峰值。然而,吸光度几乎不随量子点分数的变化而变化。因此,我们建议考虑我们的研究,以提高太阳能电池的性能。
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引用次数: 0
期刊
2023 8th International Engineering Conference on Renewable Energy & Sustainability (ieCRES)
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