民用建筑工程节能质量监督管理办法

第一条 为了加强民用建筑工程节能质量的监督管理,保证民用建筑工程符合建筑节能标准,根据《建设工程质量管理条例》、《建设工程勘察设计管理条例》、《实施工程建设强制性标准监督规定》、《民用建筑节能管理规定》、《房屋建筑和市政基础设施工程施工图设计文件审查管理办法》、《建设工程质量检测管理办法》等有关法规规章,制定本办法。     

《2008年全国高校能动学科教指委全体会议暨全国大学生节能减排社会实践与科技创新竞赛动员大会》在昆明召开

2008年5月17～22日,教育部高等学校能动学科教学指导委员会、热能与动力工程专业教学指导分委员会、热工基础课程教学指导分委员会、中国机械工业教育协会热能与动力工程学科学委员会、中国电力教育协会能源动力工程学科教学委员会,在云南省昆明市联合召开了<全国高校能动学科教指委全体会议暨全国大学生节能减排社会实践与科技创新竞赛动员大会>.     

新工科储能专业《储能与综合能源系统》的课程建设与实践

“双碳”目标背景下建设新型能源体系是保障我国能源安全的重要内容。在我国能源结构转型迫在眉睫的当下,储能科学与工程新工科专业建设应运而生。作为储能专业本科阶段的核心课程,《储能与综合能源系统》有着学科交叉、知识集成、方法融合、技术贯通等本质特征,对储能专业人才培养发挥着重要的支撑作用。本文以该门课程为例,基于华北电力大学储能专业学科建设思路和已面向两届学生开展的教学实践经验,重点阐述了该门课程的建设背景、核心特征、框架内容、特色亮点及实践经验,凝练了以“内嵌式、交互式、探究式、数字化、情景化、迭代化”为代表的课程特征,分析了课程建设目标及其达成度,为储能科学与工程专业核心课建设提供借鉴参考。     

国家发展改革委、教育部出台对学校教学和学生生活用电、用水、用气价格优惠政策

近日,国家发展改革委、教育部联合下发《关于学校水电气价格有关问题的通知》(以下简称《通知》),扩大了对学校用电、用水、用气价格优惠范围。《通知》规定,自2007年10月1日起,对学校教学和     

高职太阳能光热技术专业融入思政教学实践研究——以"太阳能光热发电技术"课程为例

课程思政与专业课程进行融合,同向同行,形成协同效应,可以更好地将立德树人这一项根本教育任务落实到位.在太阳能光热技术专业课程如何融入思政元的探索中发现,专业教师存在本身对思政教育理念不清晰、对怎么去挖掘出与课程相关的思政元素存在较大困难等问题,由此本文以太阳能光热技术专业核心课程《太阳能光热发电技术》为例,对如何更好地...     

也谈对QPFY1—2型吹砂机的改进

《节能技术》1989年第2期发表了一篇《对QPFY_1-2型吹砂机的改进》,内容是该文作者通过计算提出的改进方案和效果设想。但是,由于对吹砂机所存在问题的根本原因看法不一致,未定下措施,该机实际上并未进行任何改进。本文谈谈笔者对这个问题的看法。     

从课程创新谈本科教育

分析了当前本科课程教学中存在的问题,指出本科课程创新的目的及意义,提出从课程设置,课程内容及教学方法等途径进行创新。     

《化工仪表及自动化》中的教学改革与实践

在当前高校教育不断改革和发展的形式下,《化工仪表及自动化》作为化工工艺专业的基础课,教学内容、教学方法、教学手段及实践环节等方面均存在着一些问题,为提高教学效果和质量,本文提出了对上述各项进行教学改革的方法和措施。     

离心式泵的工作原理及人文思考

离心泵的工作原理是《泵与风机》课程教学重点也是难点。作者在离心泵工作原理的授课环节中应用到了:列举生活实例、实验制作水泵简易模型、辅助动画视频、结合专业基础课《工程流体力学》中重要知识点、人文知识引入专业课程教学等多元化教学手段,针对高职院校学生学习学习起点低、基础薄弱、学习情况参差不齐、难以持续将注意力专注于课堂、理解消化理论知识有一定难度的特点收到非常好的教学效果。     

项目教学法视角下的单片机课程教学策略研究

在项目教学法的视角下探讨单片机课程教学策略的问题,首先应该明确项目教学法的内涵,然后才能在此基础上总结与归纳单片课程的教学策略。因此,按照这样的思路,文中在解析项目教学法的内涵,后重点对三种颇为实用的教学策略进行了客观的说明。即:结合教学任务的项目设计策略、学做结合的项目实施策略和理论互补的项目反思策略。     

浅议能效对标指标体系的构建与应用

确定能效对标的指标体系是企业实施对标工作的重要环节,是联系各项对标工作流程的纽带。本文提出了构建能效对标指标体系应遵循的原则,分析了指标体系的构成要素和主要内容,归纳、总结了构建指标体系的方法和步骤,并指出了在对标指标体系应用过程中应注意的几个问题。     

Energy literacy of secondary students in New York State (USA): A measure of knowledge,affect, and behavior

Energy literacy, which encompasses broad content knowledge as well as affective and behavioral characteristics, will empower people to make appropriate energy-related choices and embrace changes in the way we harness and consume energy. Energy literacy was measured with a written questionnaire completed by 3708 secondary students in New York State, USA. Results indicate that students are concerned about energy problems (affective subscale mean 73% of the maximum attainable score), yet relatively low cognitive (42% correct) and behavioral (65% of the maximum) scores suggest that students may lack the knowledge and skills they need to effectively contribute toward solutions. High school (HS) students scored significantly better than middle school (MS) students on the cognitive subscale; gains were greatest on topics included in NY State educational standards, and less on topics related to “practical” energy knowledge such as ways to save energy. Despite knowledge gains, there was a significant drop in energy conservation behavior between the MS and HS students. Intercorrelations between groups of questions indicate energy-related behaviors are more strongly related to affect than to knowledge. These findings underscore the need for education that improves energy literacy by impacting student attitudes, values and behaviors, as well as broad content knowledge.     

我国海上风电的发展与技术现状分析

对国内外海上风电发展现状进行了对比分析,介绍了我国发展海上风电的优势和面临的困难,并针对海上风电场在设计、施工和运行等阶段可能出现的问题进行了思考和探讨.     

Improving the accuracy of heat balance integral methods applied to thermal problems with time dependent boundary conditions

In this paper the two main drawbacks of the heat balance integral methods are examined. Firstly we investigate the choice of approximating function. For a standard polynomial form it is shown that combining the heat balance and refined integral methods to determine the power of the highest order term will either lead to the same, or more often, greatly improved accuracy on standard methods. Secondly we examine thermal problems with a time-dependent boundary condition. In doing so we develop a logarithmic approximating function. This new function allows us to model moving peaks in the temperature profile, a feature that previous heat balance methods cannot capture. If the boundary temperature varies so that at some time t > 0 it equals the far-field temperature, then standard methods predict that the temperature is everywhere at this constant value. The new method predicts the correct behaviour. It is also shown that this function provides even more accurate results, when coupled with the new CIM, than the polynomial profile. Analysis primarily focuses on a specified constant boundary temperature and is then extended to constant flux, Newton cooling and time dependent boundary conditions.     

The concept “environment” in exergy analysis: Some special cases

The concept “environment” is of considerable importance in present-day engineering thermodynamics.Introduction of this concept in operation brings not only simplification of the methods of solving classical thermodynamic problems, but also gives the exergy method which forms the major new part of thermodynamics, including some parts of biology, economics and other fields of science.But practice shows that it is necessary to define the concept “environment” more precisely in some cases.     

Incentives and disincentives for using renewable energy: Turkish students’ ideas

A closed-form questionnaire was used to explore the prevalence of ideas of Turkish school students in years 7 and 8 (age 13–14 years) about renewable power generation. The questionnaire investigated students’ ideas about the characteristics of renewable energy, its perceived advantages and disadvantgaes, and, separately, their views about the importance of the characteristics of energy production; it is likely that a combination of such beliefs could act as incentives or disincentives to the acceptability of renewable power. In terms of cost, about half of the students thought that it is cheaper to generate electricity from renewable sources, and only a quarter thought that renewable power generators would be expensive to dismantle at the end of their working life. There were some concerns about safety; although half of the students thought that renewable power installations were safer than other types of power generators, over half thought that renewable power generators could in some way harm plants, animals or humans that lived nearby. In terms of the capacity of renewable electricity generation, nearly two-third of the students thought that such sources could provide sufficient power for the population, and a similar proportion thought that electricity from renewable sources would be available continuously. Only about half of the students appreciated the contribution that renewable sources could make to a reduction in global warming, and more than half thought that such generators would in fact create environmental problems. Most of the characteristics mentioned were regarded as important, although the cost of electricity appeared less so to these particular students. When the responses about believed characteristics and views about their importance were combined, it appeared that the belief that renewable power could produce a reliable supply of electricity and, encouragingly, that it could contribute to a reduction in global warming, would be persuasive arguments for its implementation.     

Fuchsian groups from the dynamical viewpoint

Here we survey the results on the structure of Fuchsian groups due to Hopf, Hedlund, Sullivan, Nicholls, Pommerenke, and others from the viewpoint of the dynamics of the geodesic and horocycle flows on the corresponding surfaces. Special attention is given to the structure of horocycle orbits; in particular, we construct Fuchsian groups with new types of horocycle orbits which are neither closed nor dense in the nonwandering set. We give a unique classification of Fuchsian groups from the dynamical viewpoint and indicate some open problems.     

生物质直燃发电配套炉前给料技术的研究与发展

针对典型生物质发电项目配套炉前给料系统的问题,提出了改进的技术方案,以拨棍上棒状拨齿有效地拨动生物质物料取代常用的绞龙螺旋对物料的推送作用,可以较好地适应不同的生物质原料,同时大幅降低给料环节的能耗;通过实验室规模试验,获取了该技术的关键技术参数以及设计原则,对于典型15 MW生物质发电机组炉前给料系统进行的估算显示采用该方案完全可以保证机组满负荷的需求,同时,配套驱动功率低于50 kW,可大幅降低能耗。     

Experience with directional couplers for partial dischargemeasurements on rotating machines in operation

Manitoba Hydro applied directional couplers for on-line partial discharge measurements on selected rotating machines beginning in 1981. With the instrumentation available at that time the measurement was vulnerable to the effects of noise external to the machine. There have been improvements in the available coupling capacitors which have allowed selection of more optimum measuring locations. In addition, new instrumentation has become available which allows some of the more serious noise problems to be overcome. The paper describes these developments as well as some of the stator winding problems which have been detected     

A NOVEL TWO-DIMENSIONAL CONVECTION-DIFFUSION FINITE-DIFFERENCE SCHEME

In this article, we develop a two-dimensional finite-difference scheme for solving the convection-diffusion equation. The numerical method involves using transformation on the prototype scalar transport equation and transferring it to a Helmholtz equation. We apply the alternating-direction implicit scheme of Polezhaev to solve for the Helmholtz equation. As the key to success in simulating the convection-diffusion equation, we exploit the solution pertaining to the Helmholtz equation in the course of scheme development, thereby providing high-level accuracy to the prediction. Since this is a new method developed for solving the model equation, it is illuminating to conduct modified equation analysis on the discrete equation in order to make a full assessment of the proposed method. The results provide us with useful insights into the nature of the scheme. It is standard practice to validate the code by investigating test problems which are amenable to exact solutions to the working equation. Results show exact agreement for the one-dimensional test problem and good agreement with the analytic solutions for two-dimensional problems.