吸收式热泵机组在北方某垃圾焚烧厂的应用经济分析

介绍了吸收式热泵机组余热利用的技术特点及在热电厂内余热利用的原理。通过实例,分析了吸收式热泵机组代替传统换热机组进行全厂供热的经济性及合理性,为吸收式热泵机组在垃圾焚烧厂的选择应用提供了借鉴。     

吸收式热泵及其应用

<正> 热泵是一种热力系统,它可以从低温处吸热,提高热量的品位(能级)后,再在高温处放热给热用户。吸收式热泵是在吸收式制冷机的基础上发展起来的。将其用于回收余热的生产实践并形成产品,在国外也只不过是本世纪80年代的事。因此,可以说吸收式热泵是一项正在发展着的回收利用低温余热的新技术。     

某住宅区冷热源型式的分析与比较

本文针对某住宅区设置集中式空调系统的要求,对风冷热泵冷热水机组、水冷螺杆式冷水机组＋燃油锅炉、由热电厂余热蒸汽驱动的蒸汽双效溴化锂吸收式冷水机组＋热交换器和燃气直燃型溴化锂吸收式冷温水机组等四种冷热源方案作了能耗和经济性比较,认为利用热电厂余热蒸汽为能耗的方案是最适合该住宅楼的空调方案。     

吸收式热泵在燃气热电厂余热回收中的应用

介绍热电厂的余热资源、可利用的热泵技术,分析吸收热泵在热电厂余热回收中的技术特点和优势,提出吸收式热泵适合在热电厂中应用的结论,为热电厂选取余热回收技术提供了参考和借鉴。     

热电厂循环冷却水余热回收技术应用

介绍大唐国际迁安热电厂循环冷却水余热回收项目建设背景,详细介绍循环冷却水热泵技术的原理及特点,以及本期项目工艺方案,根据本项目具体情况,采用电压缩式热泵与吸收式热泵串联系统回收循环冷却水余热,分析其技术特点。全面分析项目所产生的经济及环保效益,回收循环冷却水1232t/h;年外供热量约50万GJ,相当于年节约标准煤3200t;年二氧化碳减排量8384t,二氧化硫减排量27.2t,氮氧化物减排量23.7t。     

吸收式热泵技术在热电联产供热系统中的应用

介绍热电联产相结合的吸收式热泵供热技术,并结合实例工程的计算与分析,指出该技术在理论和实际应用中的可行性,该方法可回收利用大量冷却水的低温余热,大大增加现有热源的供热能力。     

电厂冷凝水余热回收系统设计与应用

为了利用电厂中产生的大量温度高于环境温度10℃左右的低温循环冷却水,从提高系统热力学完善性出发,选用第一类吸收式热泵系统,对电厂余热加以利用。详细分析了吸收式机组的循环过程,在此基础上以300MW机组为例,进行了热力计算,并对机组的经济性进行了评价。结果表明:第一类吸收式热泵机组进行电厂余热回收时综合性能系数可以达到1.78,可供给55万m2采暖面积,与原热电联供系统相比,每年可节约蒸汽15669.7t,经济效益达1389088元。     

高温吸收热泵的节能效果

<正> 一、前言冶金、化工、纺织等行业的工业装置向环境排放带有余热的中、低温废汽和废水,不仅污染环境而且浪费能源。重新利用这些余热,对消除环境的热污染和节约能源都有重大意义。高温吸收式热泵是80年代发展起来的一种有效的节能装置。它能利用中、低温余热作驱动热源,提高余热的品位,在运行中,仅消耗少量的电能驱动冷剂泵和溶液泵,其节能效果显著。此外高温吸收式热泵还具有运行时无冲击、噪声低、稳定性好、维护管理简单等特点,在开发太阳能和地热能中,它也起着举足轻重的作用。本文介绍了吸收式热泵的原理,结合溶剂厂(上海)和橡胶厂(日本)中热泵的应     

一种新的切换方式在某电厂循环水余热利用中的应用

<正>近年来,基于吸收式热泵的火电厂循环水余热利用节能改造不断升温,先后在内蒙古、新疆、山西、黑龙江等地区建设投产并取得了良好的运营效果。这种节能改造项目利用冷却循环水作为第一类溴化锂吸收式热泵的低温热源,而汽轮机的采暖抽汽为其驱动汽源。为提高运行的可靠性,无论是作为驱动汽源的采暖抽汽还是作为低温热源的循环水,均与两台主机相连,两台机组互为备用。     

溴化锂高温吸收式热泵发生器的传热传质研究

一、前言在我国，工业在迅猛地发展，余热的分布很广，需回收的余热还很多。而象70～100℃的较低品位的工业余热，不仅不能直接用作工业能源，还要通过换热设备降温后排放，对环境造成热污染和其它公害。回收利用这些工业余热的关键在于技术上的可行性和经济上的合理性，而高温吸收式热泵能够回收中、低品位的余热。它不需要高品位的热源来驱动，让一部分余热提高品位供重新利用，而另一部分则被排放至低温热源，单级高温吸收式热泵适用余热的温度范围为80～120℃，升温帼度为30℃，性能系数coP为0．4～0．5．高温吸收式热泵具有运行费用小…     

电厂循环水吸收式热泵利用系统分析

热电厂的循环水所具有的热量一般是通过冷却塔释放给大气环境,为对这部分余热回收利用,进行了水源热泵能量系统的分析研究。将热泵系统供给的热量扣除消耗的驱动蒸汽热量,再考虑导致新增的驱动电耗,及以凝汽器真空下降引起发电的热耗增加作为修正,可确定最终节能量。通过对实际热电厂4台200 MW供热机组的循环水源吸收式热泵系统进行计算,可获知年节约标准煤9 985.7 t,该方案实现了比较理想的工程节能效果。     

电厂循环水余热回收供暖节能分析与改造技术

在电厂余热利用的基础上,通过回收冷却塔散失的热量,对循环水余热回收供暖进行了节能分析,结合电厂对循环水余热回收供暖的应用,阐述循环水余热回收供暖的节能措施以及实施后的节能效果。实践证明,电厂循环水余热回收供暖具有显著的节能和环保效果。     

垃圾焚烧炉热损失影响因素分析与建议措施

垃圾焚烧发电是垃圾无害化、减量化、资源化处理最有效、可行的途径之一。垃圾焚烧发电量的多少直接影响到电厂的经济效益,垃圾焚烧炉的热损失是影响发电量的重要因素,因此研究垃圾焚烧炉的热损失具有重要意义。对某单台处理量为350 t/d垃圾焚烧炉进行研究,表明:锅炉排烟温度为205℃时,相应的排烟热损失为16.29%;过量空气系数从1.62增加到2.33,热损失从15.23%增加到20.61%,影响非常显著。     

火电厂低低温烟气处理系统烟气余热利用研究

低低温烟气处理系统与传统的除尘、脱硫工艺相比,具有良好的节能环保性能。从热力学性能和经济效益两方面分析比较了低低温高效烟气处理系统中两种烟气余热利用的方案,并以国产600 MW空冷机组为例,进行了定量分析比较。定量计算结果得出的结论对低低温烟气处理系统在中国火电厂推广使用具有一定的指导意义。     

电厂城市供热循环水余热利用技术方案探讨

根据目前余热回收利用技术在不同容量电厂中的应用情况,对比分析不同余热回收利用技术,分析各自的优缺点,可为相同机组型号的电厂节能降耗改造提供前期选择参考,为机组选型提供依据.     

饱和蒸汽发电技术在某钢铁企业的应用实例

针对某钢铁企业转炉及加热炉的蒸汽现状,建设一座3MW余热电站用于有效回收利用转炉及加热炉蒸汽.文中从余热利用方案、主要设备参数、余热利用系统、主厂房布置等方面进行了论述,详细介绍了饱和蒸汽发电技术在该钢铁企业的应用情况.饱和蒸汽发电技术的应用为节能减排、环境保护做出了巨大贡献,同时也为企业创造了可观的经济效益.     

Recent developments of refrigeration technology in fishing vessels

Modern large and fast ocean fishing vessels include mechanical refrigeration, but all of them consume precious fuel or electricity to achieve refrigeration. Fishing vessels with tonnage at about 100 tons cannot attach compressor-icemaker onboard because of their small horsepower of diesel engine. These vessels always have to carry a lot of ice for caught fish preservation. At the same time, waste heat dissipated in the hot exhaust gases in most of the fishing vessels is rejected to the atmosphere. At present, some effort has been devoted to the utilization of the vast amount of the waste energy for refrigeration. In this paper, several types of refrigeration technology in fishing vessels are introduced, such as vapor-compression refrigeration systems, heat recovery systems to power absorption refrigeration plant, adsorption systems for producing chilled water, and adsorption icemaker systems, especially an adsorption icemaker prototype in our laboratory. The better perspectives of applications for the lattermost exist in fishing vessels.     

Waste heat recovery from a landfill gas-fired power plant

Waste treatment and management is a certain challenge especially in areas with high population density. One of the options for waste treatment is landfilling, where the amount of municipal waste also produces landfill gas through anaerobic digestion. The heating value of the landfill gas is high enough to use it as a fuel in combustion processes, e.g. in internal combustion engines (ICEs) to produce electric power.In Ano Liosia, Athens (Greece) up to 6000 tons of waste are landfilled every day and the landfill gas is used in an ICE power station directly at the site of the landfill. The power station consists of 15 ICEs and has an installed capacity of 23.5 MW. The major advantages of using ICE for power generation are the high electrical efficiency of ICEs and their fast load response. However, more than 50% of the landfill gas energy content is still released to the atmosphere as engine waste heat (exhaust gas and engine cooling water).The aim of this paper is to study the possibilities of using this large amount of heat in order to increase the electricity production and efficiency of the Ano Liosia power station. Therefore, a thermodynamic and economic analysis of two different waste heat recovery (WHR) systems is conducted. The water/steam cycle and the Organic Rankine Cycle (ORC) are examined and evaluated by means of thermodynamic cycle simulation and by calculating their specific costs of power generation. Their advantages and disadvantages considering their application in landfillgas-fired ICE power stations are discussed under the consideration of maximal thermodynamic efficiency and minimal costs of power generation.     

直接空冷火电站废热再利用系统

本文受到太阳能烟囱发电技术的启发,提出用直接空冷火电站乏汽放出的潜热替代太阳能烟囱发电中不稳定的太阳能,不仅弥补了太阳能烟囱发电技术的不足,而且回收利用了直接空冷火电站中以往被浪费的乏汽潜热,进一步减少了火电站鼓风机的耗电量。以一台600 MW直接空冷火电机组为例,对系统的热力过程、阻力进行了理论分析。计算结果表明该系统每年可以回收电能2.89×108kW/h,可以产生约1.08亿元的经济效益;相当于每年可以节省标准煤10.43万t,减少排放CO2约27.32万t、SO2约886 t、NOx约772 t,经济效益和节能减排效果显著。     

A theoretical study of molten carbonate fuel cell combined with a solar power plant and Cu–Cl thermochemical cycle based on techno-economic analysis

A novel power and hydrogen coproduction system is designed and analyzed from energetic and economic point of view. Power is simultaneously produced from parabolic trough collector power plant and molten carbonate fuel cell whereas hydrogen is generated in a three-steps Cu–Cl thermochemical cycle. The key component of the system is the molten carbonate fuel cell that provides heat to others (Cu–Cl thermochemical cycle and steam accumulator). A mathematic model is developed for energetic and economic analyses. A parametric study is performed to assess the impact of some parameters on the system performance. From calculations, it is deduced that electric energy from fuel cell, solar plant and output hydrogen mass are respectively 578 GWh, 25 GWh and 306 tons. The overall energy efficiency of the proposed plants is 46.80 % and its LCOE is 7.64 c€/kWh. The use of MCFC waste heat allows increasing the solar power plant efficiency by 2.15 % and reducing the annual hydrogen consumption by 3 %. Parametric analysis shows that the amount of heat recovery impacts the energy efficiency of fuel cell and Cu–Cl cycle. Also, current density is a key parameter that influences the system efficiency.