废弃风电叶片材料回收与再制造技术的研究进展

首先，介绍国内外风电叶片的使用规模和退役风电叶片趋势，阐述国际上通用的退役风电叶片处置方式（堆放、掩埋、回收利用）及其优缺点；其次，系统介绍废弃叶片材料的典型回收利用方法，即机械回收、热回收和化学回收，比较3种典型回收利用方法的技术特点；然后，总结了利用退役风电叶片进行产品再制造的典型案例，包括制备再生复合材料板材、制造混凝土骨料、制备3D打印耗材等；最后，针对风电材料常见的玻璃纤维复合材料、碳纤维复合材料等的难切削性能，介绍风电叶片回收加工技术与装备，包括切割加工技术和装备、破碎及粉碎加工技术和设备等。     

吸收式热泵耦合带式干化在热电厂煤泥掺烧上的应用分析

热电厂煤泥掺烧机组利用吸收式热泵耦合带式干化技术,不仅可对污泥进行无害化处置,同时回收利用污泥干化及电厂焚烧余热废热,减少环境热污染,提高能源利用率.     

蓝藻泥热处置技术分析

对蓝藻泥热处置的主要方法干燥、干燥—焚烧、直接焚烧等技术进行了理论分析及工艺计算,将热处置技术成功应用于工程实践.结果表明,采用干燥或干燥—焚烧技术对蓝藻泥进行热处置,具有显著的节能和环保效益.     

复合太阳能的空调冷凝热回收技术

首先简要介绍了空调冷凝热回收的意义,其次简要介绍了冷凝热回收的分类及冷凝热回收技术的研究现状及进展,然后重点介绍了复合太阳能的空调冷凝热回收热水供应系统和复合太阳能-热泵热回收技术的研究进展及应用。最后,对复合太阳能的冷凝热回收技术进行了展望。     

退役风机叶片的回收方法分析探讨

本文对退役风机叶片的回收方法进行了调研分析。对风机叶片的回收技术进行了阐述,主要包括填埋、焚烧、直接重复利用、水泥窑协同处理、机械回收、热回收(热解法、流化床法和微波法)和化学回收。对各回收技术的技术现状进行分析探讨,目前具有商业化潜力的仅有机械回收法和热解法。     

IGCC发电显热回收技术分析与探讨

详细分析了国内外典型IGCC发电显热回收技术的技术特点、主要技术难点与措施途径。IGCC显热回收技术对提高IGCC能源利用效率具有十分重要的意义,带显热回收的IGCC发电技术,具有高效、低污染等特性,为进一步推进我国节能减排开辟了一条新的道路。     

陈腐垃圾处置及利用现状研究

综述了国内外陈腐垃圾的资源化利用现状以及潜在的处置技术,总结了垃圾填埋场陈腐垃圾特点和处置技术的相关研究,归纳了国内外垃圾填埋场开采陈腐垃圾过程生命周期评价的研究。针对陈腐垃圾与原生垃圾相比,含水率低、热值高、含大量似土壤类物质且富含营养元素,指出陈腐垃圾的处置途径为将分选后的一部分筛下物用于环境修复或作为建材,将另一部分筛上物进行能源化利用,具体可以将陈腐垃圾筛下物用于土壤修复、废水治理、作为营养土或者工程材料,都有其独特优势。同时,国内外现有的原生垃圾热处置技术都是筛上物的潜在处置手段,但是目前国内外相关研究仍较为匮乏。重点介绍了陈腐垃圾的几种潜在热处理方式,包括焚烧炉技术、水泥窑协同处置技术、热解气化技术,其中最具处理潜质的是热解气化技术。     

汽车热电废热回收的现状及关键技术分析

汽车燃油燃烧产生的70％左右化学能都可以作为热电技术的回收对象,因此热电废热回收对提高汽车的燃油经济性具有良好的应用前景.本文首先概述了国外在汽车热电废热回收从概念设计到实例研究方面的进展,然后回顾了国内在汽车热电技术方面的研究现状,最后分析了热物性、换热优化、模块布置以及负载特性等汽车废热发电方面的关键技术.随着这些瓶颈问题的解决,热电废热回收必将成为广泛应用的汽车节能技术.     

新型平板型热管热回收装置传热性能实验研究

文中对采用了平板型热管技术的热回收装置的传热性能进行了实验研究。基于北京地区冬季室外气象条件,通过变化热回收装置的迎风风速、管排数、冷/热流侧风量比等参数,对该平板型热管热回收装置的换热效率、热回收量、系统能效比以及阻力特性等进行了比较分析。所得结果将对该热回收装置的优化设计与工程应用提供参考。     

烧结矿冷却热废气回收利用研究

综述了钢铁企业冷却机内废热回收现状,分析了废热利用技术,并提出了一种回收废热的优化利用工艺.     

发动机齿轮“点蚀”的正交试验研究

评定碳氮渗齿轮质量好坏的主要参数是渗层深度、表面碳浓度及渗层碳浓度梯度。而要获得较为准确的渗层深度,合适的表面碳浓度及平缓的碳深度梯度,除了要有正确的碳势、温度、渗碳总时间外,还要有合适的强渗时间与扩散时间之比。齿轮早期磨损点蚀的原因很多,齿轮精度、材料和热处理规范及润滑油选择不当都会造成齿轮早期磨损点蚀。研究齿轮渗碳层深度超出21.67%是否会导致齿轮点蚀,通过正交试验、工艺参数研究及金相检测分析,碳化物的分析,找出了合适的工艺参数。     

不同于传统焚烧方法的垃圾热力处理技术

详细论述了热解－焚烧法和热解－气化法两种不同于传统焚烧方法的垃圾热力处理的技术和特点,并分别与常夫的层燃层式垃圾焚烧炉进行了比较和分析。     

Sulfonation of graphene nanosheet-supported platinum via a simple thermal-treatment toward its oxygen reduction activity in acid medium

The sulfonated graphene nanosheet-supported platinum (s-Pt/GNS) catalyst synthesized via a simple thermal-treatment in the presence of concentrated sulfuric acid was reported in this study. Influence of sulfonation on its structural, surface, morphological and catalytic characteristics of as-prepared s-Pt/GNS was explored using X-ray diffractometer, Raman spectrometry, zeta potential analyzer, scanning and transmission electron microscopes, and cyclic voltammetry. For the oxygen reduction reaction, the current density generated from the s-Pt/GNS at 0.6 V was approximately 32.5 A g⁻¹ Pt, which was about 193% higher than that of original Pt/GNS.     

自然通风技术研究方法及工具

目前自然通风主要有三种研究方法:简单的理论分析法、实验法和数值模拟法。本文概括介绍了后两种方法的研究现状,并对它们进行了分析比较,提出各种方法的适用场合。在数值模拟法中还介绍了几种可用于分析自然通风系统的通风特性和热特性的常用工具软件,对各自工作原理和应用特点进行了比较,并对使用方法和应用场合提出了建议。     

Potential method in the theory of thermoviscoelastic mixtures

In this article, the linear theory of binary thermoviscoelastic mixtures is considered and the basic boundary value problems (BVPs) of steady vibrations are investigated. Namely, the fundamental solution of the system of equations of steady vibrations is constructed explicitly and its basic properties are established. Green’s second and third identities are obtained and the uniqueness theorems for classical solutions of the internal and external basic BVPs of steady vibrations are proved. The surface and volume potentials are constructed and their basic properties are given. The determinants of symbolic matrices are calculated explicitly. The BVPs are reduced to the always solvable singular integral equations for which Fredholm’s theorems are valid. Finally, the existence theorems for classical solutions of the internal and external BVPs of steady vibrations are proved by the potential method and the theory of singular integral equations.     

Study of contact melting inside isothermally heated vertical cylindrical capsules

Close-contact melting processes of phase change material (PCM) inside vertical cylindrical capsule are studied. PCM are heated by the capsule isothermally at the bottom and side. The theoretical formulas of the melting rate and thickness of liquid layer during the heat transfer process are obtained by analysis, which are convenient for engineering predictions. Finally, the factors that affect melting are discussed, and conclusions are drawn.     

US nuclear energy policy Provision of funds for decommissioning

The five recognized methods of decommissioning nuclear power plants are reviewed, and are linked with US nuclear regulatory policy. Although over 60 US nuclear reactors have been decommissioned since 1960, none have been large-scale commercial facilities. Costs of the decommissioning alternatives are estimated, but are acknowledged to be highly tentative and uncertain. Five methods of providing funds for decommissioning and the actual practices of US electric utilities are analysed in terms of the policy issues they present. Revenue bonding and sinking fund approaches are argued to be the soundest means to recover decomissioning uncertainties surrounding decommissioning are considered.     

Stochastic approach for daily solar radiation modeling

Mathematical modeling of solar radiation continues to be an important issue in renewable energy applications. In general, existing models are mostly empirical and data dependent. In this paper, a novel approach for solar radiation modeling is proposed and illustrated. The proposed application consists of hidden Markov processes, which are widely used in various signal processing topics including speech modeling with successful results. In the experimental work, mean of hourly measured ambient temperature values are considered as observations of the model, whereas mean of hourly solar radiation values are considered as the hidden events, which constitute the outcomes of the proposed mathematical model. Both solar radiations and temperatures are converted to quantized number of states. Finally, after a training stage that forms the transition probability values of the described states, the hidden Markov model parameters are obtained and tested. The tests are repeated for various numbers of states and observations are presented. Plausible modeling results with distinct properties in terms of accuracy are achieved.     

质子交换膜燃料电池系统控制与应用现状

描述了质子交换膜燃料电池(PEMFC)系统的控制及其在中低功率领域中的应用现状。首先概述了过程模型和电压预测模型，对影响电堆性能的各参数进行分析。其次，从目前运用的简单控制方法、混合动力驱动、效率优化、故障容许等方面对PEMFC系统的分析与控制结构作了说明。然后介绍了PEMFC的几种具体应用。最后结合国内外的相关研究进展，提出了一些有待进一步研究的方向。     

废旧阴极碳的燃烧特性实验研究

利用热重分析仪对废旧阴极碳的一些燃烧特性进行了初步的实验研究。实验在常压下进行 ,在程序升温的条件下 ,获得整个燃烧过程的质量变化曲线 (TG)、质量变化率曲线 (DTG)与差热曲线 (DTA) ,确定了样品的着火温度、燃烧反应机理和活化能大小 ,并与一种典型无烟煤和一种典型烟煤的有关特性作了对比