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2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS)最新文献

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Analytical and numerical study to assess the solar flux on a heliostat based central receiver 定日镜中央接收器上太阳通量的分析与数值研究
Manish Kumar, D. J. Krishna
The objective of the study is to estimate the solar flux for a heliostat based central receiver system. Analytical and Monte Carlo ray tracing based numerical simulations have been performed to assess the solar flux on a fixed target. The simulations have been performed using a freeware Sol Trace released by NREL (National Renewable Energy Laboratory). A flat heliostat of (1×1 m2), which is located 10 m far from the base of a 15 m high tower, on which, (1.6×1.6 m2) target is considered for the study. Sketch up has been used for designing the model. NIT Warangal, India with a longitude 79.5 ° E and latitude 18 ° N is considered to predict the solar flux on the target on 1st April from 9 am to 5pm at the interval of one hour. Result obtained from analytical and numerical methods are compared in terms of solar flux on the target. It is observed that maximum variation between the two methods is within ±5%. The study could reveal that the field losses play an important role in the heliostat based central receiver system.
研究的目的是估计定日镜中央接收系统的太阳通量。利用解析法和蒙特卡罗射线追踪法对固定目标上的太阳通量进行了数值模拟。模拟是使用NREL(国家可再生能源实验室)发布的免费软件Sol Trace进行的。一个平面定日镜(1×1 m2),位于距离15米高的塔底10米远的地方,在塔底上考虑(1.6×1.6 m2)作为研究目标。模型的设计使用了Sketch up。考虑位于东经79.5°、北纬18°的印度NIT Warangal以1小时为间隔预测4月1日上午9时至下午5时在目标上的太阳通量。比较了用解析法和数值法计算的太阳通量对目标的影响。两种方法的最大差异在±5%以内。研究表明,磁场损耗在定日镜中央接收系统中起着重要的作用。
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引用次数: 1
Experimental studies on solar dehydrator, greenhouse dehydrator and open drying 太阳能脱水机、温室脱水机和开放式干燥的试验研究
K. Hafeezgayasudin, R. Naveen, P. Revankar
The present scenario of drying applications has contributed the emerging trends in the field of science and technology. The conventional drying systems have good proven results but at higher energy cost. The alternative means of drying system is the application of solar energy, which yields better results at the very low cost of energy. There is a need to develop the solar systems to achieve the sustainable development in case of drying applications. The presented work reports on the behavioral characteristics of solar dehydrator and greenhouse dehydrator as compared to open drying of green grapes and chilies.
干燥应用的现状促成了科学和技术领域的新兴趋势。传统的干燥系统具有良好的效果,但能源成本较高。干燥系统的替代方法是太阳能的应用,它以非常低的能源成本产生更好的结果。有必要发展太阳能系统,以实现干燥应用的可持续发展。介绍了太阳能脱水机和温室脱水机与露天干燥青葡萄和辣椒的性能特点。
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引用次数: 2
Load frequency control of multi area power system in deregulated environment with robust Controllers in coordination with frequency controllable HVDC link 放松管制环境下多区域电力系统负荷频率的鲁棒控制与频率可控的高压直流链路协调
Dr. T. Anil Kumar, G. Venu, Dr. N. Venkata Ramana
This paper presents the coordinated control of HVDC link with optimal sliding mode control and HVDC link with H-infinity controller has been proposed to solve load frequency control of multi area power system in open market environment. The performance of proposed coordinated control strategies such as HVDC-OSMC, HVDC-H-infinity has been demonstrated on two area deregulated thermal power system under one possible contact scenario. The superiority of proposed new coordinated (HVDC-H-infinity) control strategy demonstrated over HVDC-OSMC (HVDC-Optimal sliding mode controller), HVDC-PI (HVDC-Conventional PI Controller) and without any controller.
为了解决开放市场环境下多区域电力系统的负荷频率控制问题,提出了采用最优滑模控制的HVDC链路协调控制和采用h -∞控制器的HVDC链路协调控制。在一种可能的接触场景下,在两个区域无管制火电系统上验证了HVDC-OSMC、HVDC-H-infinity等协调控制策略的性能。与HVDC-OSMC (hvdc -最优滑模控制器)、HVDC-PI (hvdc -传统PI控制器)和不加任何控制器相比,所提出的新的协调(hvdc - h -∞)控制策略具有优越性。
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引用次数: 6
Sensitivity enhancement of piezoresistive pressure sensor with meander shape piezoresistor 曲线形压电阻压阻式压力传感器的灵敏度增强
Shwetha Meti, Kirankumar B. Balavalad, Ajayakumar Katageri, B. G. Sheeparamatti
Amongst various transduction principles of pressure sensor, piezoresistive method provides high sensitivity and linear operation over a wide range of pressure. In this paper, piezorestive transduction mechanism is employed for design of a pressure sensor. The diaphragm of the proposed sensor is designed using n-type of Si with copper material used as a connecting arms for the p-type meander shaped piezoresistors placed on the surface of the diaphragm in a Wheatstone bridge configuration at the high strain region of the diaphragm. Meander shape piezoresistors of different length are simulated, in order to find out the best configuration for high sensitivity and linearity. The proposed design is analysed to study the deflection of the diaphragm and output voltage across the bridge. Results reveal that the 50 μm length of piezoresistors is found to have the best sensitivity.
在压力传感器的各种转导原理中,压阻法在大压力范围内提供高灵敏度和线性操作。本文采用压阻转导机构设计一种压力传感器。该传感器的膜片采用n型硅和铜材料作为连接臂,连接臂上的p型曲线形压敏电阻放置在膜片表面,膜片的高应变区域采用惠斯通电桥结构。对不同长度的曲线形压敏电阻进行了仿真,找出了高灵敏度和线性度的最佳配置。对所提出的设计进行了分析,研究了隔膜的挠度和桥上的输出电压。结果表明,50 μm长度的压敏电阻灵敏度最高。
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引用次数: 5
Control and operation of microgrid connected Hybrid Energy Storage System 微网并网混合储能系统的控制与运行
R. Sreelekshmi, A. Prasad, M. Nair
The high penetration of the Renewable Energy Sources (RES) can create stability, reliability and power quality problems in the main electrical grid due to their stochastic nature. Microgrids can be analysed as a solution capable of guaranteeing a controlled injection of energy generated by the renewable energy technologies. The use of storage system in a MG plays an essential role in order to ensure energy balance and in maintaining high power quality. Due to the technical limitations of the currently available storage systems, it is necessary to use more than one storage technology to satisfy the requirement of microgrid applications. In order to satisfy the above constraints, this paper proposes the association of a supercapacitor (SC) and a lithium ion battery in a Hybrid Energy Storage System (HESS). A novel control strategy is adopted for the control of the HESS. Hierarchical control is used for the control of the inverter in islanding and grid connected mode. Self synchronization control ensures smooth transition between islanded and grid connected modes. Simulation of the system is carried out in MATLAB/Simulink.
由于可再生能源的随机性,可再生能源的高渗透率会给主电网带来稳定性、可靠性和电能质量问题。微电网可以分析为一种解决方案,能够保证可再生能源技术产生的能源的可控注入。存储系统的使用对于保证电力平衡和保持高质量的电能质量起着至关重要的作用。由于现有存储系统的技术限制,需要使用多种存储技术来满足微电网应用的要求。为了满足上述约束,本文提出了在混合储能系统(HESS)中超级电容器(SC)与锂离子电池的结合。采用了一种新的控制策略对HESS进行控制。在孤岛和并网模式下,逆变器的控制采用分级控制。自同步控制确保孤岛和电网连接模式之间的平稳过渡。在MATLAB/Simulink中对系统进行了仿真。
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引用次数: 25
Experimental studies on drying of orange peel in solar tunnel dryer using sensible heat storage material 利用显热储能材料在太阳能隧道干燥机中干燥柑桔皮的试验研究
Sandeep Bukke, B. Pillai, A. Karthikeyan
A solar tunnel dryer along with solar air heater has been built with sensible heat storage material at VIT University, Vellore, mainly for drying agricultural and horticulture product on small scale. The pebbles coated with black color are used as sensible heat storage material, in the dryer. A mass of 36 Kgs are used inside the dryer. The current paper determines the performance of the dryer to dry orange peels. It took 14 hrs to dry in natural convection where as it took 8 hrs to dry in natural convection along with sensible heat storage material. Solar tunnel dryer integrated with solar air heater and sensible heat storage material represents a more drying efficiency than mechanical dryers no additional cost is used to run and maintaining of dryer and natural convection with sensible heat storage is a good method improving performance of the dryer.
Vellore VIT大学利用显热储存材料建造了太阳能隧道式干燥机和太阳能空气加热器,主要用于小型农业和园艺产品的干燥。涂有黑色的鹅卵石在烘干机中用作显热储存材料。烘干机内部使用了36公斤的重量。当前的纸张决定了烘干机干燥橘子皮的性能。在自然对流中干燥需要14小时,而在自然对流中干燥需要8小时,同时还有显热储存材料。太阳能隧道式干燥机采用太阳能空气加热器和显热储存材料,比机械干燥机具有更高的干燥效率,并且不需要额外的运行和维护成本,自然对流显热储存是提高干燥机性能的一种很好的方法。
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引用次数: 4
Analyzing the Energy Generation Efficiency of Inorganic Solar Cells 无机太阳能电池的发电效率分析
Ananda Selvakumar U, C. R. Jegathese, Hubert H. Jenkins, M. A. Subaraj
The Energy Generation Efficiency of Inorganic Solar Cells also increases as the cell absorbs photons of different energies. The need for enhancing the performance and energy conversion rates have led to identify better manufacturing procedures of solar cells. Inorganic solar cells are being very widely used and experimented in various mission critical robust applications like satellites and calculators. Improvements are continuously being attempted to increase the performance of solar cells. There are various procedures to manufacture solar cells with varying performances and more experiments are required to enhance the efficiency.
无机太阳能电池的发电效率也随着电池吸收不同能量的光子而提高。提高性能和能量转换率的需要已经导致确定更好的太阳能电池制造工艺。无机太阳能电池在卫星和计算器等各种关键任务中得到了广泛的应用和实验。人们不断尝试改进以提高太阳能电池的性能。制造性能各异的太阳能电池的方法多种多样,需要进行更多的实验来提高效率。
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引用次数: 0
Automation and energy management of smart home using LabVIEW 基于LabVIEW的智能家居自动化与能源管理
J. Jenifer, T. Sivachandrabanu, A. Raju
The computerization of household gadgets which delivers a sheltered and contented subsistence is described in this paper. A photo voltaic installation is installed to bring about the energy of the tackles. The sensors accumulate the analog parameters and evaluate it by means of the virtual Instrumentation Programming LABVIEW. MICRO C IDE is expended to bound the sensors, actuators and devices. The micro controller is employed to systematize the apparatus and it acts in response to the user requirements. Energy management system provides status and power consumption of the implements. Because of the naivety of the LabVIEW, automation and energy management facility has been stretched out. The monitoring part will be taken over by personal computer.
本文描述了家用电器的计算机化,它提供了一个庇护和满足的生活。安装了一个光伏装置来产生铲球的能量。传感器对模拟参数进行积累,并通过虚拟仪器编程LABVIEW对模拟参数进行评估。microcide扩展到绑定传感器,执行器和设备。该装置采用微控制器,使其系统化,并根据用户的要求进行操作。能源管理系统提供设备的状态和功耗。由于LabVIEW的幼稚,自动化和能源管理设施已经延伸。监控部分将由个人电脑接管。
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引用次数: 3
Investigation of water depth effect on distillate production 水深对馏分油生产影响的研究
P. Kalita, Dudul Das, H. Pathak
In this investigation an effort has been made to find the effect of water depth on distillate production and to establish thermodynamic relations among the operating parameters to study their effects on still performance. In this work water is heated in a water bath and the top cover is replaced with a glass to act as condensing surface. Water is fed into water bath, the gap between water surfaces and condensing surfaces is reduced gradually. The water temperature is varied from 40-70°C at different water level during the experiment. The amount of distillate production and temperature variation was measured at an interval of 15 minutes. Based on the experimental observation, it is found that a very close agreement between theoretical and experimental results is found. The Nusselt and Grashof numbers are calculated for various experimental conditions and values of constants (C and n) are obtained from regression analysis for individual depth of water.
本研究试图找出水深对蒸馏产物产量的影响,并建立各操作参数之间的热力学关系,以研究其对蒸馏器性能的影响。在这项工作中,水在水浴中加热,并用玻璃代替顶盖作为冷凝面。将水送入水浴池,水面与冷凝面之间的间隙逐渐缩小。实验过程中,不同水位下水温在40 ~ 70℃之间变化。每隔15分钟测量蒸馏液产量和温度变化。通过实验观察,发现理论结果与实验结果非常吻合。计算了不同实验条件下的Nusselt数和Grashof数,并对不同水深的常数(C和n)进行了回归分析。
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引用次数: 1
Optimization of Solar Photovoltaic Water Pumping System during monsoon conditions 季风条件下太阳能光伏水泵系统的优化
V. Yadunandana, Chandasree Das, G. Shankar
This paper addresses the problem of solar photovoltaic water pumping during monsoon weather conditions for domestic and small scale agricultural purposes. Since solar radiation varies rapidly during monsoon conditions, a variable speed water pumping system could be a possible solution for this problem. For fixed head applications, the speed variation should be done in such a way that the maximum power should be extracted from solar panel without affecting the head of the water pumped. This paper proposes a variable speed water pumping system, using a Brushless DC (BLDC) motor which gives better efficiency compared to that of induction motor and also reduced maintenance requirements over brushed DC motors. Moreover, BLDC motors offer excellent speed-torque characteristics; high torque to size ratio, high starting torque, lower acoustic noise and electromagnetic interference, long operating life and simpler constructional feature which make them well suited for low power solar water pumping applications.
本文讨论了在季风天气条件下,家用和小型农业用太阳能光伏抽水的问题。由于太阳辐射在季风条件下变化迅速,变速抽水系统可能是解决这个问题的一个可能的办法。对于固定水头的应用,应该在不影响水泵水头的情况下从太阳能板提取最大功率的情况下进行速度变化。本文提出了一种变速水泵系统,使用无刷直流(BLDC)电机,与感应电机相比,它具有更高的效率,并且比有刷直流电机减少了维护需求。此外,无刷直流电机提供卓越的速度-转矩特性;高扭矩尺寸比,高启动扭矩,低噪音和电磁干扰,使用寿命长,结构简单,非常适合小功率太阳能水泵应用。
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引用次数: 1
期刊
2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS)
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