太阳能热水系统结合地板采暖在高层住宅中的应用

介绍太阳能热水系统结合低温热水地板采暖系统的工作原理,以上海地区为例,在高层住宅中应用壁挂式太阳能集热器,可以实现太阳能与建筑一体化。对该太阳能系统进行节能效益分析,结果表明,系统的动态回收期为3.98年。     

太阳能热水系统的应用研究

文中列举了南京市若干太阳能热水系统与建筑一体化工程概况,建议集体单位大力推广应用太阳能集中热水系统;对居民小区住宅,适合分户使用太阳能热水系统,不宜应用太阳能集中热水系统。     

西安市住宅小区太阳能的应用分析

以绿色建筑中可再生能源与建筑一体化为出发点,结合西安市的太阳能资源情况,对西安市某小区建筑的日照条件进行模拟并对建筑外立面进行分析。考虑集中式太阳能生活热水系统及分散式太阳能热水系统在该小区的适用性,得出适宜安装太阳能集热板的建筑类型。针对安装太阳能热水系统的建筑进行了静态回收年限分析,使得经济效益最大化。     

与建筑结合的几种分离式太阳热水系统

一前言随着太阳能热水系统设备的改善,在一定程度上解决了与建筑结合的问题,但是还达不到建筑设计的外观美化的要求,因此影响了太阳能热水系统的安装使用。太阳能热水系统设备如何解决与建筑     

热管真空管太阳中央热水系统

1太阳中央热水系统的适用范围 长期以来太阳能应用推广最普及的产品是太阳热水器，随着能源的日渐紧张，能源价格的不断上调，太阳能在建设工程项目中的应用逐渐受到人们的关注。建筑物的中央热水供应系统中，采用太阳能结合常规能源作为热水系统热源，成为中央热水系统降低能源消耗、节约运行费用、减少环境污染的一个有力的措施。     

太阳能生活热水系统应用研究

介绍了太阳能热水系统的基本形式,以及其相应的太阳能热水器、集热板的优缺点.并阐述了太阳能建筑一体化技术应用也是实现建筑节能与住宅建筑可持续发展的亮点.     

住区太阳热水供应系统设计流程

从建筑给排水系统设计的角度看，太阳热水供应系统是指以太阳能为热源，可以与其它能源组合，制备生活热水，并通过管路将热水输送到用水点的系统。太阳热水供应系统包括热源系统及热水供应系统两大部分。热源系统即是太阳能行业所规定的将太阳能转换为热能，并在必要时与辅助热源配合使用以加热水的子系统与部件的组合。热水供应系统即热水输送系统，是把热水送到各用水点的管道系统。     

太阳能与建筑一体化技术在北方新农村建设中的应用

通过对太阳能与建筑一体化技术的研究，结合北京市平谷区新农村改造项目中使用太阳能供暖／产生生活热水系统的实际状况，进行研究、分析，对其技术原理、节能指标、经济效益、市场潜力等方面进行综合评价，为该太阳能与建筑一体化技术的推广应用提供理论和实践的依据。     

与建筑一体化太阳能集热器的选型设计与分析

提出了与建筑一体化的太阳能热水系统核心部件——太阳能集热器的选型设计依据;为保障与建筑一体化太阳能集热器的正常运行,针对与建筑一体化的太阳能集热器选型可能出现的技术性问题,总结了解决的对策。     

浅析高层建筑太阳能集热系统的利用

技术合作信息对太阳能热水系统的运行原理与建筑物分类做重点分析。并分别从民用建筑的使用功能、规模大小、建筑的层数与太阳能热水系统结合及运行方式进行阐述。     

Power conditioning system for grid-connected photovoltaic system

This study develops a new control strategy for an expandable grid-connected photovoltaic (PV) system. The proposed system performs dual functions of a PV generation and an active power filter, or either one. To this end, the grid current, instead of output current of the converter, is shaped to be a sinusoidal current in phase (or opposite phase) with the grid voltage. Furthermore, its reference current is generated in multiplying the voltage loop controller output by the grid voltage waveform, and therefore non-active components analysis for harmonics elimination and reactive power compensation in the conventional design is not necessary. As a result, the algorithm is simple and easy to implement, and only one sensor for current detection plus two voltage sensors are required. Experimental results verified the effectiveness of the proposed method.     

微型热电联产系统

作为一种以家庭住宅为单位的全新的能源供应思路和技术 ,微型热电联产系统代表了未来家庭能源供应的主要方向。本文分别介绍了基于斯特林发动机、内燃机和燃料电池的三种微型热电联产方式的原理及特点 ,并进行了系统的性能比较     

Monitor system design of distributed wind turbine-energy storage system

风储互补配合是提高风电质量、增加风电可控性、解决风电并网问题的有效途径。本文对“一机一储”的分布式风储系统进行了分析,探讨了分布式风储系统设计的整体方案,对风储能量管理系统监控后台的数据记录、监控界面和报表生成等进行了功能设计。风储系统实际运行效果表明,该监控后台能够很好地实现监控显示、历史数据记录、运行模式设定、统计分析和报表生成等功能,系统运行可靠,可为风储系统的推广应用提供一定的参考。     

基于模型的航天器推进系统故障诊断

设计了基于模型的推进系统的故障诊断系统,根据推进系统的结构和行为模型,分析出各组件可处的工作状态及组件之间的连接关系,利用JMPL建模语言建立了推进系统各组件的定性模型。把推进系统模型和系统场景文件输入给诊断推理引擎,可实现推进系统的实时诊断。诊断结果表明,建立的推进系统模型是准确可靠的,开发的诊断系统能有效地找出故障组件并确定故障组件的状态。     

Artificial immune system for fixed head hydrothermal power system

This paper presents artificial immune system for optimal scheduling of thermal plants in coordination with fixed head hydro units. Numerical results of two test systems have been presented to demonstrate the performance of the proposed algorithm. The results obtained from the proposed algorithm are compared with those obtained from differential evolution, particle swarm optimization and evolutionary programming technique. From numerical results, it is found that the proposed artificial immune system based approach is able to provide better solution than differential evolution, particle swarm optimization and evolutionary programming in terms of minimum cost and computation time.     

Artificial neural network power system stabilizers in multi-machinepower system environment

The effectiveness of an artificial neural network (ANN), functioning as a power system stabilizer (PSS), in damping multi-mode oscillations in a five-machine power system environment is investigated in this paper. Accelerating power of the generating unit is used as the input to the ANN PSS. The proposed ANN PSS using a multilayer neural network with error-backpropagation training method was trained over the full working range of the generating unit with a large variety of disturbances. The ANN was trained to memorize the reverse input/output mapping of the synchronous machine. Results show that the proposed ANN PSS can provide good damping for both local and inter-area modes of oscillations     

Identification of system vulnerabilities in the Ethiopian electric power system

The Ethiopian Electric Power (EEP) has been operating and managing the national interconnected power system with dispersed and geographically isolated generators, a complex transmission system and loads. In recent years, with an increasing load demand due to rural electrification and industrialization, the Ethiopian power system has faced more frequent, widely spread and long lasting blackouts. To slash the occurrence of such incidents, identifying the system vulnerabilities is the first step in this direction. In this paper, the vulnerability assessment is performed using indices called active power performance index (PI_p) and voltage performance index (PI_v). These indices provide a direct means of comparing the relative severity of the different line outages on the system loads and voltage profiles. Accordingly, it is found that the most severe line outages are those lines that interconnect the high load centered (Addis Ababa and Central regions) with the rest of the regional power systems. In addition, the most vulnerable buses of the network in respect of voltage limit violations are mainly found at the high load centers.     

Performance analysis of thermal energy system with linear system method

The paper addresses the system performance of coal-fired power unit with changed auxiliary system or other localheat disturbance.The idea of state space model is imported and the universal formula for the calculation of sys-tem performance output is deduced on the system state equation.Two important vector of system are worked outunder linear system assumption and transform.The transfer matrix is the characteristics of system itself and isconstant for a similar condition,which greatly facilitates the analysis.The concept of thermal disturbance vectoris proposed to construct the thermal disturbance input easily.The method can be helpful for analyzing any ther-mal disturbance input satisfying the assumption and also for supplementing the correction means of performancetest.An example of 600MW power unit is presented to demonstrate its availability.     

Catalytic combustion and system performance assessment of MCFC-MGT hybrid system

The catalytic combustor is applied as an off-gas and startup combustor for a molten carbonate fuel cell-micro-gas turbine (MCFC-MGT) hybrid system (HS) so as to utilize the waste energy of fuel cell off-gas. Three types of catalysts are prepared over a cordieritic honeycomb support. One is Pt catalyst which is not cost effective and less high temperature stability. CeZrO₂ and LaMnO₃ have been selected as an additive for another two Pt catalysts to improve the performance. Tests have been completed in realistic conditions and reaction feed close to the MCFC-MGT hybrid system. Simulations are carried out with a fluid mechanical code that incorporates detailed transport and heat loss mechanisms. The simulation results are compared with the Pt catalyst test results. The agreement confirms the accuracy of simulation. The model can be used to develop an MCFC-MGT hybrid system with an off-the-shelf gas turbine and assess the performances during part-load operation. From the experimental results, the reaction starts at 620 K for 1 vol.% CH₄ using Pt catalyst, while the temperature is above 800 K for the addition of additive. For the 50% CH₄ conversion, the preheated temperature of the three catalysts is 713 K, 870 K and 950 K respectively. While all of the catalysts exhibit good performance when using the MCFC off-gas as fuel. The results of performance analysis for part-load conditions show that the cell operation temperature and turbine inlet temperature (TIT) should be maintained as close as possible to the design value to prevent the performance degradation.