Energy-Saving Construction Technologies for Buildings

The development of the construction industry is shifting towards low-carbon construction,so it is necessary to improve and optimize related construction concepts,methods,and processes.By improving resource and energy control efficiency in building projects,minimizing construction waste,and reducing environmental impact,a foundation for the sustainable development of the industry can be established.This paper mainly analyzes the significance of low-carbon energy-saving construction technology and the control factors of construction,summarizes the status quo of the development of building energy-saving construction,and puts forward strategies for applying building energy-saving construction technology.These strategies serve to achieve low-carbon and energy-saving goals to promote the healthy development of energy-saving construction.

Exploration of Energy-Saving Technologies in Building Electrical System Design

Green energy conservation is the mainstream trend in the current development of the construction industry.The application of energy-saving technology in building electrical system design can effectively reduce energy consumption,avoid unnecessary energy consumption,and truly achieve energy conservation and environmental protection.Based on this,the article elaborates on the principles of energy-saving design in building electrical systems,and actively explores the application of energy-saving technologies from different perspectives such as optimizing power supply and distribution system design,adopting high-efficiency energy-saving lighting equipment,applying renewable energy,promoting smart home technology,and improving the efficiency of building electrical equipment.

Application Strategy of PLC Technology in Energy-Saving Control of Tunnel Lighting

In this study,we investigated on the application of planar lightwave circuit(PLC)technology in energy-saving control of tunnel lighting.The application status of PLC in the field of energy saving followed by the necessity of energy saving in tunnel lighting was analyzed.Finally,the application of PLC in tunnel lighting energy-saving control around the three dimensions of system overall architecture design,control scheme,and program control process was investigated.The results showed that the system meets the requirements of control effect,robustness,and visual effect after trial operation,and is suitable for practical applications.

Energy-saving Technology of Vent in Passive Solar Wall of Rural House of Severe Cold Region

This paper aims at solving the problems of low thermal collection rate,inconvenient maintenance,hindering indoor using during the application of passive solar technologies in rural houses in severe cold region.All these defects prevent the passive solar houses' further development. This paper chooses trombe wall,which has higher thermal efficiency of the passive solar house,as research object. The traditional vent is improved into a new type of ventilation device. This improvement overcomes the shortcoming,which traditional vent loses huge heat,and simplifies the construction of vent. Comparing with traditional trombe wall,the energy saving rate is 15. 69%.

Energy-saving Technology Application in Building Water Supply and Drainage Construction

Under the increasing demands as well as resource shortages in today’s society,energy-saving technologies in building water supply and drainage construction plays a vital role.Through the rational application of energy-saving technologies,energy consumption in water supply and drainage projects can be significantly minimized and wastage of water resources can be reduced.This will play a very promising role in promoting sustainable development of resources and environmental conservation in the modern era.This paper analyzes the application of energy-saving technology in building water supply and drainage construction,with an aspiration to make energy-saving technology more reasonable in today’s building water supply and drainage projects and to improve the quality of water supply and drainage construction projects,while achieving effective environmental protection.

Study on Energy-saving Technology and Design Optimization of Facade in Cold and Severe Cold Area

This article take cold regions of nlral residential building envelope as the research object, suitability technical theory as the theoretical basis, we evaluation of rural residential energy envelope because China＇s rural areas is chmacterized by large regional differences and to find a solution for the envelope. It could be considered as the useful reference for retrofit design of similar projects.

An adjusted energy-saving quantity calculation method for building energy-efficient retrofit

Aiming at a comprehensive assessment of energy-saving retrofitting effect on existing buildings,a calculation method is developed to adjust energy-saving quantity in standard condition for comparison under the same conditions. A mathematical model,method theory and calculation steps are given. Error analysis results show that this method can be applied accurately to practical engineering projects. In a case study of energy-saving quantity assessment before and after retrofitting on a certain hospital in Shanghai,with energy simulation software TRNSYS,detailed application of this method is introduced and analyzed. The method is applied to the case of energy-saving quantity assessment to a hospital in Shanghai before and after retrofitting with the energy simulation software TRNSYS.

The application of the regenerative combustion technology to a radiant-tube furnace and its practice

This study compares the regenerative radiant-tube heater with the traditional radiant-tube heater, showing the regenerative radiant-tube heaters have many advantages in fuel consumption. Based on the experience of changing a heating system with traditional radiant-tube burners to a heating system with regenerative combustion, propositions are given for the combustion control system, pilot burner, flame detection and for trouble prevention in rebuilding the continuous annealing production line（CAPL） and the continuous galvanizing line（CGL）.

Application of the waste heat recovery system and energy-saving in the strip continuous annealing furnace

The common problem of cold strip continuous annealing furnaces is high exhaust gas temperature and great energy consumption. Taking the cold-strip continuous annealing furnaces of Baosteel No. 4 cold mill plant as an example, several waste heat recovery systems in the annealing furnaces are compared and their advantages and disadvantages are analyzed through different energy-saving technologies.

Review of Conventional and Innovative Technologies for Fire Retrofitting of Existing Buildings

Fire effects can be one of the most harmful conditions that any building may experience throughout its service life. Developing practical protection methods and concepts against potential fire disasters in buildings has been an important consideration in design of buildings in recent decades. Rapid developments in technology have heightened the demand for new and innovative fire protection systems in comparison with conventional and traditional methods. Such a need for new technologies is in particular of greater importance when it comes to existing buildings. Retrofitting an existing building for fire safety is a greater challenge compared with designing a new building using materials and components that have more desirable and superior fire rating to begin with. Furthermore, strategies to design a new building that includes state-of-the-art fire safety features are also different from solutions that may be more suitable for retrofitting an existing building. This paper presents a review of the literature concerning conventional and new or innovative retrofitting methods for fire safety of buildings. Advantages and disadvantages of different fire protection devices and methods as available and understood from the literature are mentioned. Study of fire safety systems shows that each has its drawbacks. Comparison of the results shows that disadvantages of a solitary system for retrofitting against fire can be improved by using a combination of several fire safety concepts or methods simultaneously.

Energy-saving performance investigation on sustainable architecture design of open-plan housing in temperate region

With the increasing requirement of a higher living quality and the growing awareness of energy saving, how to improve the indoor comfort level and to reduce the expenditure of energy and slow down the rate of natural resource consumption is becoming increasingly important. The theory of open-plan housing is able to provide a more flexible and adaptive space for the users and bring sustainable and economic benefit in the way of making full use of construction materials. Sustainable architecture design, as a method to respond the phenomenon, is able to low down the building＇ s energy consumption and has enormous potentials in creation of sustainable living environment and a high-quality dwelling condition. The primary aim of this research is to create a new sustainable architecture design method for occupancy by integrating openplan housing theory and application of sustainable technologies. Numerical simulation by computer program is applied in order to investigate and evaluate the possibility of this method in teruas of improving indoor comfort level and energy-saving capacity.

既有建筑水泥基外围护系统低碳改造技术研究

既有建筑水泥基外围护系统存在开裂、渗漏、脱落、空鼓和高能耗等问题,为保障其安全及功能性,开展既有建筑外围护系统低碳改造是重要解决办法。系统介绍了既有建筑外保温缺陷形成原因,厘清外保温缺陷检测技术,提出外保温风险评估流程和风险等级划分方法,明确外保温低碳设计计算理论。针对外保温不同缺陷类型,提出不同的施工工艺流程及注意事项,为既有建筑外保温低碳改造技术应用推广提供借鉴与参考。

循环水泵节能方式的应用与对比

针对循环水泵能耗高的问题,分析变频调速、定制高效泵、自主选型改造、水泵运行模式优化、高分子涂层技术等不同节能方式在钢铁企业中的应用场景,并对比不同节能方式的优缺点,可为各工序循环水系统节能方式的选择提供参考。

330MW汽轮机综合提效关键技术开发及工程应用

针对某电厂CC330MW三缸双排汽汽轮机缸效率偏低、上下缸温差大、汽封漏汽量大等问题,对汽轮机进行通流改造优化,包括应用进汽室-内缸一体化结构、单层中压缸设计、优化汽封型式、高效宽负荷叶片技术等。在满足多参数工业供汽的前提下,提高汽轮机各缸效率,同时机组的宽负荷运行能力和可靠性也得到显著提高。通流改造前后机组热力性能试验结果表明,优化后机组额定负荷及部分负荷工况下,综合能效提高,发电煤耗降低。

炼厂燃气动力炉富氧燃烧技术改造方案及性能分析

通过实验研究和理论分析,对燃气动力炉富氧燃烧污染物排放与燃烧特性进行研究,分析氧气体积分数对锅炉燃烧性能的影响。结果表明:当氧气体积分数为28%~30%时,炉膛温度基本与空气助燃工况相当,而炉膛的传热效率则随氧体积分数的升高而上升。氧体积分数升高可以提升燃烧效率,降低烟气中CO的排放,同时,富氧燃烧通过屏蔽氮源及控制炉温可大幅降低NO_(x)质量浓度。在70 kW热水锅炉上测试结果表明,当燃气量为3 m^(3)·h^(-1)、富氧助燃氧气体积分数大于28%时,锅炉排烟中NOx质量浓度小于20 mg·m^(-3),CO质量浓度小于80 mg·m^(-3),排烟中CO_(2)体积分数为32%,水体积分数为63%,该烟气经脱水后,CO_(2)体积分数可达到95%以上,满足CO_(2)用于驱油的指标要求。

Temperature-Based Fan Speed Optimization Strategy

As energy efficiency and indoor comfort increasingly become key standards in modern residential and office environments,research on intelligent fan speed control systems has become particularly important.This study aims to develop a temperature-feedback-based fan speed optimization strategy to achieve higher energy efficiency and user comfort.Firstly,by analyzing existing fan speed control technologies,their main limitations are identified,such as the inability to achieve smooth speed transitions.To address this issue,a BP-PID speed control algorithm is designed,which dynamically adjusts fan speed based on indoor temperature changes.Experimental validation demonstrates that the designed system can achieve smooth speed transitions compared to traditional fan systems while maintaining stable indoor temperatures.Furthermore,the real-time responsiveness of the system is crucial for enhancing user comfort.Our research not only demonstrates the feasibility of temperature-based fan speed optimization strategies in both theory and practice but also provides valuable insights for energy management in future smart home environments.Ultimately,this research outcome will facilitate the development of smart home systems and have a positive impact on environmental sustainability.

夏热冬冷地区既有公共建筑围护结构低碳改造技术研究

既有公共建筑存在能耗高、保温性能差、外墙饰面层脱落和开裂等问题,开展既有公共建筑低碳改造是解决上述问题的重要路径。系统介绍了夏热冬冷地区常见公共建筑围护结构、材料及标准,研究既有公共建筑围护结构服役状态,重点梳理功能设计标准和节能、防水、防火功能指标要求,探讨既有公共建筑围护结构改造技术及改造案例,对既有公共建筑的未来发展方向提出建议,为既有公共建筑低碳改造技术应用推广提供借鉴与参考。

组合减震技术在加固改造项目中的应用

以新冠肺炎疫情期间的应急项目加固改造为例,主要探究组合减震技术在加固改造项目中的应用。鉴于既有结构抗震性能以及防震缝宽度不足、结构整体扭转和局部抗震承载力不足的问题,兼顾加固工程量、最大限度减轻对原有建筑影响以及加固成本,最终采用组合减震技术(VFW+BRB)对原有框架进行加固设计。根据项目实际情况,按照不同的部位和重要程度制定了性能目标和设计。计算结果表明,采用组合减震技术加固后的结构在遭遇地震作用时,可以显著减少顶点位移和水平加速度,降低地震响应,提高结构抗震冗余度。

小型蒸汽锅炉水煤浆燃烧行为的数值模拟研究

为了将水煤浆燃烧技术应用于国内中小型锅炉的改造,本文是以Fluent17.0为计算平台,以国内某小型水煤浆蒸汽锅炉为研究对象,采用数值模拟方法研究了水煤浆在炉膛内的燃烧和传热特性。基于Gambit2.4建立了锅炉炉膛的三维物理模型,并以六面体结构网格对计算区域进行了网格划分。基于Fluent17.0,在充分考虑水煤浆的雾化特点和水汽化吸热的基础上,详细研究了助燃空气预热温度变化对炉内水煤浆燃烧、炉膛温度分布和水冷壁换热的影响。研究结果表明,当助燃空气预热温度为523K时,水煤浆可在该锅炉炉膛内实现良好的燃烧,且能量利用也能达到较高水平。

旧水泥混凝土路面改沥青混凝土路面技术浅析

随着我国城市建设的不断推进,人们更加注重出行的舒适度。具有车行舒适度高、维护便利、噪音小、平整度好等优点的沥青混凝土路面成为日常市政道路建设首选。将存在病害的旧水泥混凝土路面改造成沥青混凝土路面,可极大地提高路面质量和车行舒适度。文中就旧水泥混凝土路面改沥青混凝土路面的步骤和技术措施进行了介绍和分析,并结合实例根据现状路面评定标准选取适当的改造处理技术,可为此类道路改造工程提供参考。