上海某大型污水泵站变频泵节能运行分析

对上海某大型污水泵站的节能方案进行了分析讨论,简要介绍了通用污水泵站的概况以及原有的水泵变频控制技术.依据该泵站现有的运行条件,分析了供水泵站和排水泵站水泵变频运行的必要性以及排水泵站变频节能的基本原理.在原有控制基础上提出了变频泵的节能控制方案,对变频调速的水泵采用最小轴功率法进行最优控制,以改善该泵站的能耗水平,使水泵机组在满足安全运行的条件下能尽量高效运行,达到节能运行的目的.     

基于系统方法的水泵系统节能潜力分析及应用

通过对水泵系统常见调节方式的系统运行效率和节能潜力分析,指出系统的优化方案应建立在对系统进行全面测试和分析上。两个节能改造案例表明:水泵系统节能潜力巨大,应用适当扬程和流量的水泵更换原处于低效区运行的水泵,在此基础上再应用变频技术将会取得可观的节能效果和比较短的投资回收期。     

浅谈风机水泵节能的重要方法——变频调速

风机、水泵节能是企业节能的重要方面,阐述了风机、水泵变频调速的节能原理、运行机理,分析了变频调速的优点及不足,要搞好运行维护、日常保养、定期更换部件等使该系统发挥优良的节能特性。     

1000MW机组循环水系统节能应用介绍

某电厂1000MW机组通过在循环水系统采取运行方式优化、循环冷却水泵电机变频改造及冷却塔动态节能运行系统应用等有效措施,使得循环冷却水泵电耗显著下降,节能效果显著,为同类型电厂挖掘循环水系统节能潜力,实施节能改造提供参考。     

集中空调系统水泵变频调速运行模式节能设计

为降低能源资源损耗,设计节能的水泵变频调速运行模式优化集中空调系统,但传统节能设计影响了水泵变频调速运行模式的智能化效果,导致空调系统的电耗值过大,因此研究全新的集中空调系统水泵变频调速运行模式节能设计方法.提高循环系统中冷却液的工作压力,确保发动机相关部件的冷却液循环状态,将发动机的运行温度控制在合理范围内.通过分析...     

600MW机组循环水系统优化试验分析

国信扬州发电有限责任公司二期3#、4#机组循环水母管采用联络方式运行,相对于循环水母管独立运行,节能运行的空间较大,目前循环水泵3A进行了电机双速改造,通过循环水泵组合试验,依据凝汽器变工况计算的结果以及循环水泵耗功和机组微增出力之间的关系,对机组的循环水泵经济调度和节能潜力进行了分析。     

水泵节能技术与效果

本文针对金卫泵站水泵运行效率较低的情况，分析了原因，提出了提高吸水井水位、叶轮切削、扩大调速范围等节能措施，以减少水泵扬程的浪费，从而提高了水泵运行效率，取得了很好的节能效果。     

基于实际管网特性的并联水泵节能运行研究

文中分析了影响实际管网特性的两个主要因素,管网最小阻力的存在导致实际水泵变频运行曲线与额定工况不相似,水泵运行台数的增减会导致管网阻抗系数改变,两者都会导致并联水泵运行调节时能耗大于理论上的相似估算值。为进行并联变频泵组节能运行优化,建立了数学模型,编写了python程序,可计算不同目标流量下水泵运行的最佳方案。结合实际案例,给出了水泵变频运行下限的计算方法,仿真模拟验证了该优化方法可以计算得到不同情况下运行方案之间的能耗差异,并分析了管网最小阻力和台数不同时的运行能耗量化结果,其中水泵运行台数增减导致管网阻抗系数的改变对能耗的影响更大。该研究基于水泵运行时面临的实际问题提出的解决方案,为挖掘水泵节能潜力、提升能耗预测精度提供参考。     

浅谈水泵机组的节能潜力

从水泵机组选型配套、安装运行、维护管理及运行调节等方面入手 ,分析了水泵机组实现经济运行的途径 ,从而达到节能的效果。     

城镇供水系统的有效节能途径──水泵变速运行

城镇供水系统中水泵是耗电大户，对水泵实行变速运行，把传统的阀门节流或多台并联运行变为变速运行，是供水系统节能的有效途径．在中小城镇供水系统中，采用液力偶合器调速是一种可取的变速节能方案．     

双水位可控节水洁具装置的研究

介绍一种双水位卫生间洁具水箱节水型排水阀装置。本装置为串联式提拉阀,第一级为低水位阀门,第二级为高水位阀门,两级阀门控制两个档位的排水,以适用对大小便等冲污量不同的用水量要求．尤其适合于对旧水箱的节水改进。     

A novel thermal water pump for circulating water in a solar water heating system

This research purpose was to perform a parametric study of a novel thermal water pump well fitted in a simulated solar water heating system (SWHS). The SWHS was composed of a heating tank (HT), a hot water storage tank (ST) and an overhead tank (OT). The HT together with a specially designed valve act as a novel thermal water pump that gets power from hot water vapor and air pressure produced by a built-in electric heater in order to transfer heat from the HT to ST. The general operation of this pump has four stages for each cycle: heating, water circulating, vapor circulating and water supplying. The discharge water heads were varied with an increment of 0.25 m from 0.75 to 3 m. According to the experiment, it was found that the pump could operate at an average HT temperature of about 80–95 °C leading to 70–80 °C ST temperatures and 20–35 pumping cycles and consumed 17 MJ energy input during 9-h period. The overall thermal efficiency of the SWHS was 33–42% and the mean pump efficiency was about 0.005–0.011% depending upon the discharge heads.     

Hydrogen and fresh water production from sea water

A review of hydrogen production as a source of energy was made. Electrolysis was found to be the major technique of hydrogen production from sea water. A potential difficulty with this process is the chlorine and oxygen that are evolved at the anode. A new concept for hydrogen production from sea water by an electrochemical method was investigated. In this concept fresh water and hydrogen are produced simultaneously. The electric cell consists of a set of electrodes with each electrode suspended between two plastic membranes (cations and anions). Hydrogen is evolved from the cation compartment and chlorine gas from the anion compartment. Cost estimation and evaluation of the process were made.     

去离子水电解液与蒸馏水电解液的比较

简要介绍了去离子水的制备过程,分析了用去离子水作铅酸蓄电池硫酸稀释剂的好处。通过两种蓄电池 三充二放"试验、装车试验及经济效益分析,得出去离子水铅酸蓄电池更能提高铅酸蓄电池使用可靠性。     

太阳+海水=淡水

法国南锡化学工程实验室的化学家皮埃利戈夫,经过不断的失败和挫折后,终于研制成功一种结构简单、使用方便的太阳能淡化海水新装置,可大大节约淡化海水的成本。 在海湾地区,尽管海水取之不尽,但每个国家几乎都缺少淡水。虽然许多国家已建起海水淡化工厂,     

风能提水与节水灌溉技术

以风能为动力提水并利用地形自然落差发展节水灌溉技术，解决了无电偏远山区的缺水问题。介绍了风力提水原理、特点、适用及适宜的节水灌溉形式。     

Solar water pumping clean water for Sudan rural areas

The Republic of Sudan in Eastern Africa has one of the fastest growing economies in Africa. However, its remotely isolated rural areas pose problems to rural energy management and development because of poor road links with the urban centres, and remoteness from the national electrical transmission grid. Development of renewable energy sources, therefore, has a vast potential in Sudan. Solar energy, with excellent sunshine of over 3000 h per year, is of paramount importance, the applications of which are already quite siginficant and are growing at steady rate. Solar energy is suitable for small-scale water pumping in remote areas where the demand is regular, such as for drinking water, but it may also be used for irrigation. Most areas in Sudan have climates suitable for solar pumping. A review is given of the use of solar energy for water pumping to improve the living conditions of the population in rural areas and to develop techniques for utilization of solar energy in a tropical environment condition. Results, suggests that, solar powered water pumping must be encouraged, promoted, invested, implemented, and demonstrated by full scale in Sudan.     

空调冷凝水作为水资源的回收利用

理论分析了在户式空调、中央空调末端装置的空调冷凝水的产生量，介绍了冷凝水作为冷却塔补充水、景观灌溉、水景等用途及注意事项。     

From water to energy: The virtual water content and water footprint of biofuel consumption in Spain

Energy diversification and the use of renewable energy sources are key points in the European energy strategy. Biofuels are the most popular renewable resource option for the transport sector, and the European Union has established objectives that the Member States must adopt and implement. However, biofuel production at such a scale requires a considerable amount of water resources, and this water–energy nexus is rarely taken into account. This paper shows the strong nexus between water and energy in biofuel production and estimates the virtual water (VW) content and the water footprint (WF) from the raw material production that will be needed to reach the Spanish targets for biofuel consumption by 2010. The results show how the impact of such targets on the global and local water situation could be reduced through virtual water imports and, at the same time, how these imports could increase Spain’s water and energy dependence. Hence, in order to manage water from an integral perspective of the territory, the inclusion of biofuel consumption objectives should go hand in hand with measures to reduce the demand of energy in the transport sector.