冷凝式锅炉及工程应用

文章阐述了冷凝式锅炉的工作原理及其应用，分析了冷凝式锅炉在工程应用时可能遇到的问题及其对策，并根据冷凝式锅炉在欧洲及北美国家的历史和发展状况探讨了在我国发展冷凝式锅炉的市场前景。     

高调节比冷凝锅炉控制技术

正0引言由于热负荷的不断变化,传统大型锅炉运行中不可避免的存在能源浪费的问题。模块锅炉相当于把单体大锅炉拆分为若干个小锅炉。这种系统的最大特点是把热媒按质、按量、按时地供给采暖用户,最大限度地提高了锅炉运行的可靠性和高效率。西门子电子比例调节燃烧控制技术,能够达到很高的负荷调节比,应用于冷凝式模块锅炉上,节能效果突出。1冷凝式模块锅炉特点冷凝式模块锅炉出力范围通常为0.5~2.0 MW,采     

燃气冷凝锅炉节能因素分析

以燃气锅炉烟气冷凝余热利用及节能特性为研究对象,通过理论计算以及实际运行相结合,分析总结了冷凝式燃气锅炉的节能关键点,为冷凝式锅炉的运行调整和节能优化提供了理论支持。     

冷凝式锅炉

首先介绍了热效率达到或超过100％的冷凝式锅炉的基本概念、工作原理、分类与基本型式，然后简要介绍冷凝式供热与电站锅炉及其系统，最后对冷凝式锅炉尾部特有的安全问题与预防进行探讨。     

联合供热冷凝式锅炉中央辐射供暖系统及其评价

暖浴两用冷凝式锅炉和地板辐射采暖联合供热系统在我国采暖领域还没有应用,文章给出了以联合供热型冷凝式锅炉为中央热源的低温地板辐射采暖系统,分析了该系统的主要型式及其工作原理,评价了系统的经济性和节能环保效益。     

凝结换热与冷凝式锅炉原理及应用(续完)

阐述了凝结换热及冷凝式锅炉原理及其应用背景,分析了制约冷凝式锅炉快速发展的技术和政策瓶颈,介绍了先进的凝结换热和冷凝式锅炉应用技术,为我国未来冷凝式锅炉技术创新指出了参考方向。     

凝结换热与冷凝式锅炉原理及应用(待续)

阐述了凝结换热及冷凝式锅炉原理及其应用背景,分析了制约冷凝式锅炉快速发展的技术和政策瓶颈,介绍了先进的凝结换热和冷凝式锅炉应用技术,为我国未来冷凝式锅炉技术创新指出了参考方向。     

天然气锅炉改造为冷凝式锅炉的经济性评价

燃气供热锅炉排烟温度较高，带走了大量的热能。如果加装冷凝式换热器回收烟气的显热及潜热，可以大大提高锅炉效率，但是加装换热器必然增加设备成本。本文通过对冷凝式换热器设计计算，计算出不同排烟温度下的热能回收设备投资回收期，从经济上分析了天然气锅炉改造为冷凝式锅炉的可行性，并给出了锅炉最佳排烟温度。     

基于多台冷凝式锅炉的给水系统的优化设计

针对多台冷凝式锅炉组成的系统,为提高燃气锅炉余热回收率,提高锅炉热效率,设计了一套给水系统。在一台或多台锅炉运行时给水系统实现自动分配,充分保证在用锅炉冷凝式节能器的进水量,使烟气中的水蒸气有效冷凝,达到高效节能的目的。优化结果表明,排烟温度降到烟气露点以下,锅炉热效率均可达102%以上,单台锅炉提高效率7%以上。冷凝式节能器进水量达到最大进水量的1/3时,调节进水阀开度,锅炉排烟温度随着进水流量的增大而减小,锅炉效率随着进水流量的增加明显提高。     

冷凝式燃气相变锅炉的开发与研制

冷凝式燃气相变锅炉不仅具有燃气相变锅炉的不爆炸、不结垢、不腐蚀、不发生鼓包、爆管、运行安全、可靠、平稳等诸多优点外,还具有冷凝式燃气锅炉的高效、节能、环保等特点.按锅炉热力计算中采用低位发热量作为计算基础,这种锅炉热效率口可达到或超过100%,节能效果尤为显著.     

冷凝式燃气热风炉在采暖中的应用及其节能分析

介绍了用于房间采暖系统的冷凝式燃气热风炉及其特点,分析了其节能性以及用于住宅采暖的特点优势。提出冷凝式燃气热风炉将以其特有的优势逐步进入我国采暖行业。     

增氧燃烧型冷凝式燃气锅炉节能特性的研究

指出了冷凝式燃气锅炉在实际应用中存在的问题,给出了增氧燃烧型冷凝式燃气锅炉的概念。以陕北天然气作为燃料,对增氧燃烧型冷凝式燃气锅炉的节能特性进行的研究表明:采用增氧燃烧技术的冷凝式燃气锅炉,热烟气中水蒸气的露点温度和理论冷凝率、锅炉的供暖季节效率随着增氧体积份额的增加而增加;锅炉排烟热损失和引风机的能耗随着增氧体积份额的增加而减少。     

Economics of residential gas furnaces and water heaters in US new construction market

New single-family home construction represents a significant and important market for the introduction of energy-efficient gas-fired space heating and water-heating equipment. In the new construction market, the choice of furnace and water-heater type is primarily driven by first cost considerations and the availability of power vent and condensing water heaters. Few analysis have been performed to assess the economic impacts of the different combinations of space and water-heating equipment. Thus, equipment is often installed without taking into consideration the potential economic and energy savings of installing space and water-heating equipment combinations. In this study, we use a life-cycle cost analysis that accounts for uncertainty and variability of the analysis inputs to assess the economic benefits of gas furnace and water-heater design combinations. This study accounts not only for the equipment cost but also for the cost of installing, maintaining, repairing, and operating the equipment over its lifetime. Overall, this study, which is focused on US single-family new construction households that install gas furnaces and storage water heaters, finds that installing a condensing or power-vent water heater together with condensing furnace is the most cost-effective option for the majority of these houses. Furthermore, the findings suggest that the new construction residential market could be a target market for the large-scale introduction of a combination of condensing or power-vent water heaters with condensing furnaces.     

风电供暖技术方法研究

风电供暖对于提供风电场运行效率具有重要意义。根据风电场的实际情况选用合适的供暖方案,可以有效地减轻和避免风电场对电力系统的不利影响,同时提高了风电场在电力市场中的竞争能力。重点分析了离网型风电机组独立供暖、风电互补供暖、风光互补供暖、风电和燃气联合循环机组供暖等几种基本方法。     

冷凝式燃气热水锅炉节能分析

~~冷凝式燃气热水锅炉节能分析@叶勇军$南华大学建筑工程与资源环境学院!湖南衡阳421001 @寇广孝$南华大学建筑工程与资源环境学院!湖南衡阳421001 @王汉青$南华大学建筑工程与资源环境学院!湖南衡阳421001 @王志勇$南华大学建筑工程与资源环境学院!湖南衡阳421001~~~~~~~~     

Energy conservation options for residential water heaters

Current designs of gas-fired and electric water heaters present a substantial opportunity for energy conservation through reductions in jacket losses, pilot losses and flue-gas losses. A systematic analysis and comparison of alternative energy-conserving designs has been carried out. Promising options for gas-fired water heaters include increased insulation, thermostat setback, forced-draft burners with intermittent ignition and flue closure, and instantaneous (low storage) designs. High efficiency electric water heaters incorporate increased insulation, thermostat setback, solar preheat, and heat pump operation. The evolution and market penetration of these alternative designs, some of which are commercially available at this writing, can reduce the energy usage for residential water heating in the U.S. by approx. 0.3 quads in the near-term, and up to 1.0 quads in the long-term as advanced designs achieve widespread saturation.     

燃气轮机热电联供系统性能评估案例

对某供热厂的燃气轮机热电联供系统进行了研究,将燃煤分产和燃气分产进行了全方面的比较,其性能评价对合理应用CHP有重要作用。在热电分产的节能性方面,以燃气-蒸汽联合循环电厂和燃气锅炉作为比较的基准线,全年平均节能率为8.9%;在运行经济性方面,燃气轮机系统与燃煤锅炉分产相比,每年节省46万元,与燃气锅炉分产相比,每年节省182万元,且节省费用随着电价的增加而增加,随着气价的增加而减少。另外,与燃煤锅炉分产相比时,还随着煤价的增加而增加;在排放物方面,燃气轮机联供系统与燃煤分产和燃气分产对比,NOx减排量并不显著,而其余排放物有明显地减少。燃气轮机系统与燃煤以及燃气锅炉相比具有一定的优越性,在设计合理的情况下具有良好的前景。     

Energy and economic comparisons of domestic heat pumps and conventional heating systems in the British climate

The energy performance of an electrically driven heat pump in a typical installation has been estimated for three locations in the United Kingdom. Comparisons made of the heat pump performance with electric resistance, oil and gas heating systems using an annualised life-cycle cost method of analysis showed that the heat pump offers economic advantages over the electric resistance heaters and the oil-fired boiler, but is not an economic alternative to the gas-fired central-heating system. To become competitive with gas-fired boilers, either the capital cost of the heat pump must be substantially reduced or its seasonal coefficient of performance increased by about 50%.A heat pump can be economically attractive when it is integrated into existing fuel-fired central-heating systems or when it is used with thermal storage and run on economy 7 electricity.