A Homeowner-Based Methodology for Economic Analysis of Energy-Efficiency Measures in Residences

Residential energy-efficiency measures, besides energy savings, provide opportunities for improvement of thermal comfort, air quality, lighting quality, and operation. However, all these benefits sometimes are not enough to convince a homeowner to pay the incremental cost associated with the energy-efficiency measure. The objective of this work is to develop a methodology for the economic evaluation of residential energy-efficiency measures that can simplify the economic analysis for the homeowner while taking into consideration all factors associated with the purchase, ownership, and selling of the house with the energy-efficiency measure. The methodology accounts for direct and indirect economic parameters associated to an energy-efficiency measure;direct parameters such as the mortgage interest and fuel price escalation rate, and indirect parameters such as savings account interest and marginal income tax rate. The methodology also considers different cases based on the service life of the energy-efficiency measure and loss of efficiency through a derating factor. To estimate the market value, the methodology uses the future energy cost savings instead of the cost of the EEM. Results from the methodology offer to homeowner annual net savings and net assets. The annual net savings gives the homeowner a measure of the annual positive cash flow that can be obtained from an energy-efficiency project;but more important, the net assets offer a measure of the added net wealth. To simplify and increase the use of the methodology by homeowners, the methodology has been implemented in an Excel tool that can be downloaded from the TxAIRE’s website.

Application Analysis of Energy Saving Measures in Oilfield Electrical Engineering

With the rapid development of the social economy,people are paying more and more attention to environmental issues.If society wants sustainable development,it must put energy conservation and emission reduction on the agenda.At this stage,China has vigorously promoted energy conservation and emission reduction,and all walks of life have gradually embarked on the green road of energy conservation.In recent years,energy saving measures has been widely used in China's oilfield electrical engineering.The author explores and analyzes the basic principles of energy saving measures applied in oilfield electrical engineering,and proposes an effective way to apply energy saving measures in oilfield electrical engineering,hoping to contribute to the energy saving effect of oilfield electrical engineering.

Present situation and development of saving energy and reducing emission technology in iron ore sintering process

The energy consumption of iron ore sintering process is about 10%- 15%of the total of iron and steel industry.Therefore,it is of great significance to take effective measures to reduce the energy consumption in the iron ore sintering process to reduce the costs of sintering product and cut down the emissions of harmful gases,such as CO_2 and SO_2.In this study,the technology development of saving energy and reducing emission in iron ore sintering process was reviewed and discussed;some new directions and measures of saving energy were presented for the sintering process in the future.

An Approach to Energy Saving and Cost of Energy Reduction Using an Improved Efficient Technology

The electricity consumption in commercial places like universities has tremendously increased recently. Modern and advanced energy efficient appliances are highly needed to substitute the conventional ones. Energy saving is of great important instead of its wastage, as utilizing the energy efficiently reduces the cost of energy. Energy consumption varies for commercial building due to several factors such as electrical appliance usage, electrical appliance type, management, etc. Due to the advancement in technology, there are new emergence appliances that are of high efficiency and have less energy consumption. A case study is conducted on selected five tutorial rooms, level 4 buildings in the Faculty of Electrical Engineering 19 A, Universiti Teknologi Malaysia. The paper proposes new emergence equipments with high efficiency and less power consumption to replace the existing ones. A survey is conducted on the number of electrical appliances used for each of the tutorial rooms, time table for each tutorial room and the Tenaga Nasional Berhad pricing and tariff are taken into consideration in the analysis of the energy consumption and the cost of energy. This paper aims at reducing the amount of energy consumption by replacing the existing electrical equipments with high efficient electrical equipments;it also tends to reduce the cost of energy paid to the utility. By observing the results, it shows that the proposed efficient electrical equipments are more efficient, less power consumption and less cost compared to the existing electrical equipments.

面向5G-A的无线网络节能关键技术

建立网络能耗模型,对基站在数据发送状态、接收状态、休眠模式及模式转换的相对功耗进行建模,可以评估各种网络节能技术的节能增益。面向5G-A,从时域、空域、频域和功率域等方面,研究包括公共信号轻量化设计、极简小区架构、小区不连续发送/接收模式、基站唤醒机制、节能测量上报增强等网络节能的关键技术,使能更动态、高效、精准的无线传输,并通过终端和基站间信息交互的方式提升节能效果。随后,仿真验证了这些技术的正确性和有效性。

Research on Green Transformation of Campus Sponge and Energy Saving Facilities on Sloping Land

Based on the renovation of sponge and energy-saving facilities in a middle school in Nanning,this paper systematically studies the overall elevation of the campus,the composition of the drainage system and the layout of space functions,and formulates a characteristic scheme for the renovation of sponge and energy-saving facilities according to the characteristics of the sloping campus.In order to control the total amount of rainwater runoff,the sponge transformation mainly adopts the transformation methods of partition catchment,upper storage and lower use,multi-stage detection and classification treatment.For the purpose of solar energy and wind energy utilization,solar photovoltaic panels and small-scale wind power generation system are adopted.The application effects of sponge and energy-saving facilities are estimated and evaluated.

建筑节能施工技术及控制--以乐府兰庭(三期)工程为例

中国特色社会主义市场经济的高速发展为我国建筑行业的进步提供了稳定基础,近年来我国的建筑工程施工规模越来越大,施工技术也越来越先进,特别是建筑节能施工技术取得了突破性进展,在提升建筑工程施工质量、优化建筑等方面发挥了积极作用。因此,根据实际情况,以乐府兰庭(三期)工程为例,对建筑节能施工技术及控制进行了深入研究。

WIA-PA网络中的基于节能的AODV路由算法改进

能源问题对于WIA-PA工业无线网络是非常重要的;因为在恶劣的环境中它们只能依靠其有限的电池供电;传统的路由算法中,选路时没有考虑节省能量的策略,它会造成一些关键节点的过度使用而过早的退出无线网络;针对WIA-PA网络的能量受限问题,提出了一种基于搜索有较大可持续能量路由的节点方法,并对AODV协议进行改进,逸免了低能量节点的使用,从而延长了网络的生存时间;该路由协议经过了理论分析和计算机仿真的验证,具有可行性和有效性,对于WIA-PA网络的节能路由协议研究以及实现具有一定的参考价值。

基于i-bus EIB系统的室外照明节能措施研究

对室外照明的节能措施加以定性分析和研究,提出室外智能照明节能的几种措施,并用工程实例来说明i-bus EIB系统在室外照明智能控制中的应用。

严寒地区超低能耗外窗节能改善措施研究

文中致力于研究严寒地区超低能耗建筑外窗窗框的设计优化问题。为充分把握超低能耗建筑外窗的特点,并针对性地改善严寒地区的建筑外窗性能,以我国东北部严寒地区的哈尔滨市为模拟城市环境,根据哈尔滨当地气候特点进行模拟分析,以传热方式为模拟发起点,通过软件研究外窗的玻璃、窗框等方面的系统组合、热工参数和低传导构造、设计等对于超低能耗建筑外窗节能性能的影响,以期提出一套切实可行的方案,为能在严寒地区提高超低能耗建筑外窗的节能性能提供参考。

过程能量综合技术在味精生产企业能量优化中的应用(Ⅱ)--味精生产过程“三环节”能量系统改进措施

以某味精生产企业能量系统为研究背景,提出了该企业能量系统改进的方向;并以"三环节"模型为研究思路,根据该企业的工艺流程和设备运行状况,提出了一系列能量系统改进措施,通过热力学分析,这些改进措施预计可使该企业的净能耗减少18.59%,热量回收率提高20.34%,火用回收率提高10.37%,表明本研究提出的能量改进方案是可行的,模型是可靠的。

液压挖掘机液能回收再利用节能装置测控系统

液压挖掘机动臂下降重力势能和回转制动动能均以节流和溢流的形式转化为了油液的热能,严重影响整机能效,亟需提高液压挖掘机液压系统的效率。针对这一问题,提出了基于三腔蓄能器的挖掘机液能回收再利用的节能装置方案,可以回收挖掘机动臂势能和回转制动动能,用于驱动动臂举升。首先,介绍了节能装置的工作原理。其次,设计并开发了节能装置的测控系统,采用CoDeSys编写了下位机控制器程序,直接控制节能装置的动作实现能量回收和再利用;运用C#语言开发了上位机程序进行节能装置电控系统和液压系统的模拟调试和数据监控,并实现了节能装置的远程无线通讯功能。试验结果表明:该测控系统实现了对插装阀开闭和比例节流阀开度的快速、精准控制;达到了对节能装置远程控制和数据实时采集的目标;节能装置的动臂势能回收效率为84.9%,动臂节能效率为52.8%,回转制动工况下的动能回收效率为41.1%。

绿色低碳城轨通风空调节能措施探讨

城市轨道交通在优化城市功能配置、解决交通拥堵问题、提升居民出行环境等方面发挥着重要作用,但同时,作为“用能大户”城市轨道交通需要耗费大量能源。近年来,随着“碳达峰”“碳中和”目标的提出,发展绿色低碳城轨成为人们的共识。地铁通风空调系统能耗约占地铁车站运营能耗的50%~60%,其节能措施研究对提高能源利用效率及绿色低碳城轨具有重要意义。结合工程设计经验,分析了目前城市轨道交通中通风空调系统运行现状及存在的问题,结合大系统、小系统、多联机系统及空调水系统的具体节能设计方案,从设备和系统配置方面探讨了主要节能措施和节能技术发展方向。

70万吨/年裂解柴油加氢装置能耗分析及优化方法

文章介绍70万吨/年裂解柴油加氢装置基本能耗情况,通过与200万吨/年工业燃料油加氢改质装置的能耗进行对比,找出裂解柴油加氢装置的能耗差距及优、缺点;再通过对现运行装置能耗改进措施实施后的运行数据进行分析,寻找出裂解柴油加氢装置能耗的改进方向。

城镇污水处理厂电耗与节能措施分析

城镇污水处理厂耗电环节多,能耗大。以某城镇污水处理厂为例,本文对耗电单元进行电耗分析,然后提出节能措施。该污水处理厂的污水处理工艺流程为市政污水→预处理→调节池→厌氧-缺氧-好氧(A2O)反应池→二沉池→絮凝反应沉淀→滤池→消毒池→出水。结果表明,该污水处理厂的主要耗电设备为鼓风机和水泵。因此,要以鼓风机、提升泵和回流泵为重点,采取相应节能措施,从而达到良好的节能效果。

年产10万吨文化纸项目设计节能分析

以某年产10万t文化纸项目为例,对工艺流程进行了简要介绍,针对性地提出工艺专业节能措施和电气专业节能措施,以期项目达到良好的节能效果。

能耗剖析与绿色创新:深海平台能源效率优化

文章旨在对某深海平台的能耗进行剖析,并探索绿色创新策略以优化其能源效率。换热器作为一种关键设备,在深海环境中承担着重要的任务。为了提高其能源效率,文章对某深海平台中以换热器设备为主的系统能耗进行深入剖析。通过分析能耗数据,以提前发现潜在的能耗瓶颈和不高效的能源利用问题。基于能耗分析的结果,提出一系列绿色创新策略,旨在优化某深海气田换热器的能源效率。通过实施这些策略,期望能够显著降低某深海气田换热器的能耗,提高能源利用效率,并减少对环境的不良影响。文章对某深海气田的能源管理和绿色创新具有重要意义,通过深入剖析能耗,提出节能措施并加以实施,可以实现某深海气田设备的可持续发展和能源效率的显著提升。

基于模型预测前馈-反馈控制的斗轮机上煤系统的优化

利用电厂悬臂式斗轮机循环往复式回转取煤过程中存在重复性的特点,记录前一回转周期取煤过程中的瞬时流量、悬臂回转速度和回转角度等数据,作为当前回转周期取煤时的煤层模型预测依据并进行前馈控制,以克服大迟延环节的影响;同时针对煤层模型预测不能准确预知当前取煤过程中突发的扰动,引入反馈系统进行控制,以解决煤层塌方等引起超载的问题.多次现场运行数据分析的结果表明,与原来的上煤系统相比,采用本方法的上煤流量更均匀,上煤效率更高.

BIM技术在建筑绿色节能设计中的应用

BIM技术在建筑绿色节能设计中的应用不仅可以实现数字化目标,而且还可以减少工程的施工费用投入。基于此,本文结合BIM技术在建筑绿色节能设计中的应用特点,提出BIM技术在绿色建筑采光、室内外通风、日照分析等方面的应用措施,希望为提高BIM技术在建筑绿色节能设计中的应用水平提供参考。