降低某大型公共建筑空调负荷的节能措施分析

以某大型公共建筑为例，对降低空调负荷以实现节能的两项技术措施进行了分析。以此表明，目前公共建筑节能潜力巨大，应该引起社会各方更多的关注。     

基于动态负荷跟踪的水蓄冷空调系统节能研究

以中原经济区职业教育培训学校水蓄冷空调系统为研究对象,针对实际工程案例,采用配合蓄冷空调动态负荷的跟踪监测系统,相比传统空调系统日平均节约电费为12 704.60$,可转移非低谷电量41.28%。通过对系统负荷进行动态跟踪监测,分析了空调输出负荷与实际所用负荷匹配技术的相关性,以期合理调控空调区域负荷需求、适时提供制冷量,旨在实现系统节能降耗和减少实际开机容量,为类似空调系统的工程设计、运行及空调动态负荷监测的研究提供参考和借鉴。     

空调机组和建筑物节能潜力分析

本文分析了空调的技术节能途径包括空调机组的能效比,以及房间空调器的季节能效比（SEER）和冷水机组的部分负荷值（IPLV）。对于建筑节能,提出了采用新型低能耗的围护结构,合理利用太阳能和地热能等自然能源来减少建筑物能源的消耗,同时从政策节能方面分析了相应的政策法规支持,对减少空调用电负荷有很大的积极作用。     

地下商业建筑负荷分析及空调系统节能设计

合适的空调系统能够为地下商业建筑营造舒适的人员活动环境.在对地下商业建筑负荷进行分析的基础上,提出适合地下商业建筑的空调系统节能设计方案,该方案可实现提高舒适性和节能的目的.     

变频技术与空调节能

文章分析了变频技术对空调系统的影响。提出变频技术不但可以节省空调系统的输送能量,而且能够用来调节制冷主机的能量,是一种有效的节能技术,但是在实际应用时,必须注意与空调系统的合理配置。     

建筑物冬季供暖空调逐时负荷

对华北地区冬季建筑物南外窗的逐时日射得热和相应的室内空气得热进行了分析和计算,结果表 明在大部分的日照时刻南外窗(玻璃幕墙)的逐时日射得热及室内空气逐时得热已超过其本身的逐时负 荷。中央空调系统应采用合理的空调分区和有效的调控设备利用这部分热能,以避免造成建筑物冬季 南向房间过热和能源浪费。     

办公楼楼板地面及底面造隔热层以降低间歇空调冷负荷的节能评估

以简化理论计算了间歇空调的办公楼一周的降负荷及附加冷负荷,提出了楼板地面及底面造隔热层以降低楼板向室内放热及在周六、周日的吸热量,简化计算了典型夏日可节省日间空调平均耗冷量约10W/m2.以周一为例,需为一般地毡式地面办公楼单元增加室内设备冷却容量约18W/m2,造楼板隔热层后则只需增加约8W/m2.周一清早降负荷时问...     

变风量空调系统设计冷负荷计算方法的探讨

指出了在空调房间末端冷量可调的变风量空调系统,对制冷设备客量选择具有很大影响的室内冷负荷应当以空调建筑中所有房间逐时冷负荷的综合最大值为依据。并以旁通型变风量集中空调系统为例,对空调系统设计冷负荷的计算方法进行了分析讨论。     

暖通空调系统现行节能技术问题的探讨及分析

现代建筑中,暖通空调能耗占建筑总能耗的比例越来越大,为了实现节能降耗的目标,推进建筑行业节能减排工作,研究其节能技术是十分必要的。文中从影响暖通空调能耗的几个方面出发,探讨目前暖通空调的节能技术并分析其存在的一些问题。     

空调冷冻装置节能对策

从生产现状出发,通过对空调冷冻装置采取多种节能措施,以及对提高节能水平和用能水平的过程进行分析总结,从而整合优化生产工艺,降低装置能耗。     

壁挂式太阳能热水器经济性和节能性分析

以天津地区典型气象年的气象数据为基础,利用综合能源价格法,分析使用年限、集热器面积对壁挂式太阳能热水器经济性的影响,并与其他热水器进行经济性比较,对其进行节能效益分析,评价壁挂式太阳能热水器的经济性和节能效益。     

地源热泵空调系统的经济性分析

介绍了地源热泵系统的概念和在我国的发展概况 ,并对地源热泵系统与几种常用空调系统的经济性进行了对比分析     

基于节能监测的造纸行业节能潜力分析

从能源利用监测角度论述了节能监测和能源审计的异同,以造纸行业为例,总结和分析了造纸行业节能监测要点和节能潜力,可为企业节能降耗提供参考依据.     

循环经济框架下的可再生能源发展回顾与思考

在国家倡导大力发展循环经济的形势下,回顾了国内外可再生能源产业现状,展望可再生能源产业发展的前景,剖析了可再生能源产业发展中的问题,提出了建设性的意见。     

The socio-political economy of nuclear energy in China and India

This article investigates forms of social, political, and economic organization conducive to nuclear power expansion. We begin by developing a theoretical framework of nuclear socio-political economy based primarily upon the evolution of nuclear energy in France. This framework posits that (1) strong state involvement in guiding economic development, (2) centralization of national energy planning, (3) campaigns to link technological progress to a national revitalization, (4) influence of technocratic ideology on policy decisions, (5) subordination of challenges to political authority, and (6) low levels of civic activism are influential factors in supporting development of nuclear power. Accordingly, we seek to verify the causal properties of these six catalysts for nuclear power expansion in two nations – India and China – that are on the brink of becoming major nuclear powers. We validate our framework by confirming the presence of the six catalysts during the initial nuclear power developmental periods in each country. We also apply our framework as a predictive tool by considering how present conditions in the two nations will impact nuclear power development trends. We conclude by highlighting the emergence of a potential seventh catalyst – the influence of greenhouse gas emission abatement policy on nuclear power development.     

1000MW机组凝结水泵低负荷运行节能分析

对于多台凝结水泵运行的机组,除采用变频调节外,充分利用凝结水泵性能,在更宽的负荷范围内实现单泵安全运行,对电厂节能将起到重要作用。根据某1000 MW电厂的实际情况,分析低负荷下单泵运行的经济性和安全性。实践表明,在500~700 MW,采用单泵运行比采用双泵运行具有更高的节能效果。     

Growth and structural change in China's energy economy

China has been the world's most vibrant economy and its largest source of energy demand growth over the past two decades, accounting for more than one-quarter of net growth in global primary energy consumption from 1980 to 2005. To sustain economic growth and rising living standards, China needs effective policies that anticipate and shape the country's future energy requirements. In this paper, we examine China's national economic and energy accounts over the past decade for insights into changing energy use patterns and their relationship to economic structure. Our results indicate that incipient structural changes in the Chinese energy economy and sustained economic and energy demand growth in China will pose important, and different, challenges for policymakers.     

内燃机车中冷器热负荷计算与设计

在分析了机车中冷器的结构形式和冷却方式的基础上,选用了一种新颖合理的内燃机车中冷器设计计算方法。采用此方法,可以对所设计的中冷器反复进行校核计算,直至所设计的中冷器满足要求为止。在校核计算中,选用了新公布的换热综合关联式。还结合编程流程图给出了一套简单适用的计算机编程设计方案。     

Measurements and analysis of load and speed effects on the instantaneous wall heat fluxes in a direct injection air‐cooled diesel engine

This work presents an experimental analysis which is carried out to study the instantaneous heat fluxes, during the engine cycle, in the cylinder head and exhaust manifold of a direct injection, air‐cooled, four‐stroke diesel engine. For temperature measurements, a new pre‐amplification unit for fast response thermocouples, appropriate heat flux sensors and an innovative, object‐oriented, control code for fast data acquisition have been designed and developed at the authors' laboratory. The experimental installation separates the engine transient temperature signals into two parts; namely the ‘long’‐ and the ‘short’‐term response ones; followed by their discrete processing in two independent data acquisition systems. One‐dimensional heat conduction with Fourier analysis of the raw temperature data are implemented in order to calculate the instantaneous engine combustion chamber and exhaust pipe heat fluxes. This study concentrates on the correct interpretation of the measured temporal variations of heat fluxes and the examination of the effect of engine load and speed on the cylinder head and exhaust manifold heat flux losses. Many interesting aspects of transient engine heat transfer are revealed. The simultaneous presentation of heat fluxes on the cylinder head and exhaust manifold, together with the engine indicator diagram, sheds light into the mechanisms governing transient heat transfer during an engine cycle. Copyright © 2000 John Wiley & Sons, Ltd.