亚临界燃煤机组节能改造技术路线分析

论述了亚临界燃煤机组节能改造技术路线,对以汽轮机通流改造为主的综合升级改造、凝汽式机组供热改造、以烟气余热利用为主的综合升级改造三个技术路线的节能效果和改造的关键点等内容分别进行了对比,最后给出了节能减排改造技术路线选取的相关建议,可为同类型机组节能减排一体化改造提供参考.     

汽轮机通流改造节能效果及经济性分析

针对国内40台不同容量等级、参数水平、冷却型式的汽轮机发电机组,在调研各机组通流改造技术方案、改造前后汽轮机热耗、改造静态投资、改造节能效果的基础上,重点分析实施通流改造项目的 经济效益,并对比不同外部条件对改造效益的影响.研究结果表明,汽轮机发电机组通流改造改造后100％ THA工况下发电煤耗可降低5～ 15 g/k...     

125MW汽轮机的技术改造

介绍 12 5MW机组改造采用的先进技术 ,以及冲动式改造方案与反动式改造方案的改造范围。     

600 MW机组凝泵变频及顺控改造

分析了凝结水泵变频改造、改造后运行以及改造效果,得出凝结水泵实施变频改造是节能降耗的首选.     

基于工质侧改造超临界机组全负荷脱硝研究

随着环保要求进一步提高,很多电厂面临低负荷脱硝投运改造的问题。目前国内主流的改造思路总体概括来讲分为烟气侧改造和工质侧改造两类,工质侧改造由于系统简单,便于运行人员操作,尤其是后期维护工作量小,日益受到重视。文中结合某电厂几种工质侧改造设计计算,分析了每种改造方案的注意事项及优缺点,对其他的改造工程提供借鉴和参考。     

旧城改造项目的住宅节能改造措施研究

旧城改造作为重大民生工程和发展工程,改造范围大、规模广.为了践行新时代绿色环保的理念,我国大力推行旧城改造项目的住宅节能改造.为了降低建筑能耗,提高资源利用效率,实现环保节能,从旧城改造项目的住宅节能改造背景出发,结合老旧住宅小区的能耗分析,就具体的住宅节能改造措施进行研究.     

天津大港发电厂#3锅炉改造

本文介绍了天津大港发电厂#3锅炉概况 ,改造原因 ,改造目的和改造的范围 ;预测改造后的运行性能和特点。该工程改造成功对电厂安全运行和提高经济效益具有重大的意义     

采暖居住建筑节能改造分析

介绍既有采暖居住建筑节能改造的必要性以及围护结构保温改造和供暖系统改造的基本方案,对建筑节能的改造费用和节能收益进行分析。     

火电厂风机变频改造节能分析

通过分析火电厂风机运行特性,总结出风机节能改造需要解决的问题,提出变频改造的需求,在阐明变频改造原理和优点的基础上,通过电厂风机改造实例,分析风机变频改造的节能效果;通过试验数据分析表明,火电厂风机通过变频改造能够取得显著的节能效果及经济效益。     

浅析汽轮机通流部分改造对辅机性能的影响

汽轮机通流部分改造是否可以达到预期效果在某种程度上取决于辅机系统对改造的适应性,因此分析与探讨关键辅机的适应性对确保机组增容改造后的安全经济运行具有重要意义.以某型300MW汽轮机的通流部分改造为实例,分析其部分辅机设备主要参数在改造前后的变化趋势,重点讨论关键辅机在汽轮机通流部分改造后其固有特性对机组性能的潜在影响,进而为优化改造方案提出建议,以期为同类机组增容改造提供参考.     

常熟电厂#1机汽轮机电液控制系统（DEH）简介

简述了常熟电厂＃１机汽轮机控制系统ＤＥＨ改造的情况。在现有设备的基础上,采用低压油电调方式,以最少的改造费用,最短的改造周期,达到与高压油系统相当的控制水平,为国产３００ＭＷ汽轮机调改造低压油模式走出一条新路。     

Evaluation of retrofitting gas-fired cooling and heating systems into BCHP using design optimization

The influence of energy prices on the feasibility of a retrofit is investigated. The retrofit describes the conversion of a system from HVAC to BCHP for energy-saving. This includes two optimal retrofit design models, of which the exergetic efficiency and annual costs (AC) are the separate objective functions. The retrofit scheme is planned to insert gas engines as prime movers into the original system, which have adopted gas-fired absorption chillers. The solutions of the optimizations show that such a retrofit can result in a remarkable rise in exergetic efficiency but is not viable with current energy prices. The contradictory solutions reveal a gap between the current energy prices system of the country and the present energy situation. Further investigation gives the critical lines of which each divides the coordinate plane of natural gas–electric prices into two parts of benefit and deficit. If the electric price rises to a certain extent, the retrofit will be advantageous both in benefit and energy-saving. So it is really an urgent task to reform the energy prices system in China. Conclusions may be helpful for other similar retrofit projects, and for legislators and the government which are responsible for improving the energy market in China.     

合同能源管理在医院建筑节能改造中的应用

既有建筑开展节能改造是我国现阶段落实节能减排目标、实现可持续发展的关键工作内容之一。合同能源管理作为一种新兴的节能改造商业模式,可以充分调动用能单位开展节能改造的积极性,并充分利用市场资源,最终有效落实节能减排目标。对合同能源管理的概念内涵、发展现状、扶持政策、改造技术以及常见的商业模式进行概述,并以实际的医院建筑改造项目为案例,对其采用合同能源管理的改造方案、商业模式以及风险管控进行介绍,旨在为我国的公共建筑特别是医院建筑的节能改造提供参考依据。     

Plant energy saving through efficient retrofit of furnaces

Tubular process furnaces belong to energy demanding equipment in the process industry, especially in the chemical and petrochemical process plants and refineries. Several ways of energy saving in such plants usually exist. Retrofit of furnaces can be considered as one of the straightforward and efficient ways. However, operational and geometrical constraints of an existing furnace are the reasons due to which the retrofit of a furnace is a very difficult task. Therefore, the process retrofit is usually focused on heat exchanger network (HEN) retrofit considering maximum furnace duty. Nevertheless, the furnace retrofit should be considered wherever possible. In some older plants, the placement of new shells or topology changes in HENs can be expensive due to various reasons and only minimum topology modifications are usually allowed. The furnace retrofit procedure described in this paper is based on an advanced furnace integration approach using some principles of Pinch Analysis and considering furnace limitations. It can bring surprising results. This method combines principles of an effective design of both processes and equipment. An efficient methodology for furnaces retrofit, using optimization of both stack temperature and air preheating system, is applied. An advantage of this approach is demonstrated through a case study — retrofit of furnace in petrol hydrogenation refining plant for energy efficiency improvement.     

亚临界机组提温至超超临界综合改造方案及应用

为满足国家节能减排及电厂机组指标创优需求,结合当地政府环保要求,电厂亚临界湿冷机组需通过提温至超超临界等级和湿冷改空冷等综合改造来满足政府环保要求,并进一步提高机组效率。以某电厂一期亚临界600 MW等级机组综合提温提效至超超临界参数和湿冷改空冷项目为例,简述机组综合改造方案及项目实际应用情况,重点介绍了汽轮机改造难点及解决方案。研究成果可为国内外同类型机组提温改造及湿冷改空冷提供参考。     

Achievements and suggestions of heat metering and energy efficiency retrofit for existing residential buildings in northern heating regions of China

In order to promote energy efficiency and emission reduction, the importance of improving building energy efficiency received sufficient attention from Chinese Government. The heat metering and energy efficiency retrofit for existing residential buildings of 0.15 billion m² in northern heating regions of China was initiated in 2007 and completed successfully at the end of 2010. This article introduced the background and outline of the retrofit project during the period of 11th five-year plan. Numerous achievements that received by retrofit such as environmental protection effect, improvement of indoor environment, improvement of heating system, investment guidance effect, promotion of relevant industries and increasing chances of employment were concluded. Valuable experience that acquired from the retrofit project during the period of 11th five-year plan was also summarized in this article. By analyzing the main problems emerged in the past, pertinent suggestions were put forward to promote a larger scale and more efficient retrofit project in the period of 12th five-year plan.     

过热器减温水过量的治理改造与实施效果

针对某电厂5号锅炉实际运行过程中存在的过热器减温水过量的问题,提出了4种受热面改造方案,通过对4种改造方案热力计算结果的对比分析,最终选择方案A对锅炉尾部受热面进行了初步改造.改造后的实际运行和性能试验数据表明:在不同负荷工况下,过热器减温水总量明显下降,平均下降约100 t/h;省煤器出口欠焓在允许范围内,保证了锅炉水循环的安全性;机组整体的经济性、安全性及可调性都得到提高,改造取得了圆满成功.     

Cost–benefit analysis of retrofit of high-intensity discharge factory lighting with energy-saving alternatives

Due to increased concern about overall energy costs and the appearance of efficient and inexpensive lighting system alternatives, factories and plants with high-intensity discharge (HID) lighting are forced to consider retrofit with more modern, energy-efficient lighting. The decision is complicated from an economic perspective, and there is a lack of information readily available on the topic. This study provides an analysis of the replacement by retrofit of common probe-start metal halide and high-pressure sodium industrial lighting systems. Retrofit options considered include the more recent pulse-start metal halide lamps and a range of T5 high output and T8 fluorescent lamp configurations. Recent data on lighting system pricing, labor and energy costs, and time required for tasks are reported. The results generated include savings, payback period, and net present value for many retrofit options, as well as the change in energy consumption, carbon footprint, and lumen output for each retrofit. Effects of varying rate of return and daily duration of operation are considered. Based on change in lumen output, payback period, net present value, and comparison of lighting quality, one or two options are recommended from the overall retrofit options considered. A fluorescent retrofit is recommended for each of the HID initial scenarios considered. The payback period is no more than 3 years in any recommended case. The focus of this study is on the potential energy and cost savings, and some proposed solutions may, or may not, be acceptable due to lack of illuminance uniformity.     

Forecasting uptake of retrofit packages in office building stock under government incentives

As government and industry plan to reduce energy consumption in building stock, there is a need to forecast the uptake of retrofit packages across building stock over time. To address this challenge a diffusion model was set up and applied to office building stock across New South Wales (NSW) in Australia, accommodating a high spatial resolution and temporal capability for projecting uptake of technology packages characterised by multiple variables. Six retrofit packages were set up for the diffusion model, which ranged from inexpensive services and manuals through to mid-priced packages involving energy efficient T5 lighting and solar hot water through to expensive packages such as chilled beams and Solar PV. We evaluated the model using a base case and two policy programs, representing the Green Building Fund and Environmental Upgrade Agreements. These were recent incentive programs funded by the Australian government to accelerate the uptake of retrofit packages, by providing financial support to upfront expenditures and removing barriers to retrofit. By forecasting uptake of each retrofit package to 2032 under each program, we demonstrate how the model can be a valuable resource in tailoring expensive government programs and increasing their effectiveness.