Optimisation of solar-hydrogen power system for household applications

A numerical method was developed for optimising solar–hydrogen energy system to supply renewable energy for typical household connected with the grid. The considered case study involved household located in Diyala Governorate, Iraq. The solar–hydrogen energy system was designed to meet the desired electrical load and increase the renewable energy fraction using optimum fuel cell capacity. The simulation process was conducted by MATLAB based on the experimental data for electrical load, solar radiation and ambient temperature at a 1-min time-step resolution. Results demonstrated that the optimum fuel cell capacity was approximately 2.25 kW at 1.8 kW photovoltaic power system based on the average of the daily energy consumption of 6.8 kWh. The yearly renewable energy fraction increased from 31.82% to 95.82% due to the integration of the photovoltaic system with a 2.25 kW fuel cell used as a robust energy storage unit. In addition, the energy supply, which is the economic aspect for the optimum system, levelised electricity cost by approximately $0.195/kWh. The obtained results showed that the proposed numerical analysis methodology offers a distinctive property that can be used effectively to optimise hybrid renewable energy systems.     

Effect of heat treatment on foaming properties of ostrich (Struthio camelus) egg white proteins

The effect of heat-treatment on foaming properties of ostrich albumen was investigated. At pH 7.5, coagulation of ovotransferrin (OT) resulted in minimum foaming capacity (FC) and maximum foam density (FD). While both exposure of sulfhydryl groups of ovalbumin (OV) and OT-OV interactions improved FC at lower pH, neither of them had beneficial effect on FC at pH 9. At pH 9, FC and FD were mildly affected by heat-treatment because of less aggregation of OT, then FC decreased due to covalent aggregates composed of ovomucin and OV, but at higher temperatures, higher level of OV unfolding resulted in enhanced FC.     

Application of high density steam flash-explosion in protein extraction of soybean meal

The high density steam flash-explosion (HDSFE) was used to extract protein from soybean meal. Soybean meal samples were treated at 1.3 MPa and 1.8 MPa for 60 s, 120 s and 180 s, respectively. After HDSFE treatment at 1.8 MPa for 180 s, the extraction yield of protein was increased from 50.50% to 65.66% compared with untreated soybean meal. The emulsification properties and fat-binding capacity of soy protein isolate (SPI) extracted from soybean meal treated by HDSFE were all improved compared with SPI extracted from untreated soybean meal and white flakes. Molecular weight distribution analysis of SPI showed that after HDSFE treatment the peak with molecular weight about 504 kDa and 43.3 kDa disappeared and the peak with molecular weight about 669 kDa increased indicating protein aggregation. Gel electrophoresis showed that high molecular weight aggregates of protein have been formed by covalent bond.     

Comparative study of maximum power point tracking techniques for hybrid renewable energy system

The power generation demand is increasing day-by-day throughout the world, therefore, the use of hybrid systems becomes a significant solution. The hybrid renewable energy system (HRES) is used for delivering power in various regions in order to overcome intermittence of wind and solar resources. Because of increasing environmental problems, for example, greenhouse gas emission and energy cost have interested novel research into substitute methods in favour of electrical power generation. Maximum Power Point Tracking (MPPT) control method is a vast deal of novel research used for enhancing the efficiency of HRES. The authors have revealed that the hybrid techniques i.e. Global MPPT, fuzzy-neuro systems, Adaptive Neuro-Fuzzy Inference System (ANFIS), Perturbed and Observe (P&O) + Adaptive Neural Network (ANN) etc. can provide best results as compared to other MPPT control methods. This paper offering a state of art review of MPPT control techniques for HRES.     

FC21电子凸轮在E1S400压力机上的应用

介绍了ＦＣ２１凸轮的硬件组成和编程方法,结合在Ｅ１Ｓ４００压力机上应用的实际情况提出可供参考的经验。     

不同拓扑结构FC-AE-1553B网络性能研究

研究点对点、交换式与仲裁环3种不同拓扑结构的网络,建立FC-AE-1553B网络的Markov模型,并分析单点故障对不同拓扑结构总线的影响。仿真结果表明,基于点对点结构的FC-AE-1553B网络在传输NT节点到NC节点的数据流时,具有最小时延,基于交换机实现的FC-AE-1553B网络在传输NT节点到NT节点的数据时,传输性能较优。     

一种选煤厂自动配煤系统的设计

本文介绍了一种基于PROFIBUS工业现场总线的分布式计算机控制系统，采用基于遗传算法的模糊智能控制技术，用以实现选煤厂自动配煤。     

基于IP的存储网络技术

介绍了存储局域网(SAN)和附网存储(NAS)特点,讨论了网络存储的发展趋势———基于IP的存储网络技术,并与光纤通道(FC)协议的存储局域网作比较,分析其优势,另外讨论了基于IP的存储网络的关键技术,并给出了有关实现方案。     

VxWorks环境下基于FC．Core的光纤通道适配器控制程序的设计

本文在介绍了FibreChannel协议概念的基础上，说明了基于PCI接口的光纤通道适配器的基本结构，并详细介绍了在VxWorks环境下使用XilinxFCCore的基础上开发控制程序的设计思路，分析了控制程序的队列机理并给出了实现方案，为实际开发奠定了基础，对于开发同类产品也具有普遍意义。     

TDMA原理在机载数据采集系统中的应用

首先介绍了 TDMA(Time Division Multiple Access)原理和光纤传输,接着对其在机载数据采集系统中的应用进行详细研究。在此工作基础上,利用现场可编程逻辑阵列(FPGA),对所提出的方案进行了硬件设计与实现,设计了一个基于FC(Fiber Channel)的光信号传输、多节点的分布式系统。在实际验证中,实验结果达到了预期的目标,说明该设计方案稳定可靠。