带吸收式制冷的汽轮机热电联产

<正> 许多工业部门或其他部门既需要一定电力,也需要一部分热能。有些单位设置了背压式汽轮机进行热电联产以满足热和电这两方面的需求。为了提高热电联产的效率,足够的热负荷是很重要的。通常热负荷是用于干燥、蒸煮以及冬季供暖等等。在某种条件下,热电联产的热负荷往往不足。近年来,利用低品位蒸汽作为热源的吸收式制冷机在国外已得到普及,在我国的应用也越来越多。今后不但工业部门或者其他部门(如大型宾馆等)有条件的均可采用带吸收式制冷的热电联产,冷天可利用余热进行供暖,热天则由吸收式制冷机利用余热供空调,以及日常过程冷却和冷藏等用。这样就可以大大节省电力,使背压式汽轮机进     

太阳能驱动溴化锂吸收式制冷装置的优化设计

本文介绍了用于夏季室内空调的太阳能驱动溴化锂吸收式制冷装置的优化设计。分别就高、低两种驱动热水设计温度进行了优化计算，得出了装置的结构参数和各自的运行参数，编制的优化设计程序不仅可用于装置结构参数和运行参数的优化，还可用于预示不同驱动热水温度下装置的性能。     

远洋渔船吸收式制冷应用可行性分析

氨-水吸收式制冷作为一种成熟的陆用技术,如果能在拥有丰富余热资源的渔船上应用,将在节能环保领域产生明显成效。通过实船调查,本文分析了具体条件下氨-水吸收式制冷机应用于实船的可行性,对吸收制冷系统进行了初步的设计,并对技术经济性进行了量化分析,最后分析了系统控制的关键点。     

新型太阳能吸收式制冷循环的性能分析

在两级溴化锂吸收式制冷循环的基础上,提出了一种由太阳能驱动的新型吸收式制冷循环,并对其进行性能分析。通过大量计算,分析结果表明,在现有太阳能集热器所能提供的热水温度范围内,新型太阳能吸收式制冷循环有较高的热力系数。该循环系统的中间压力、中间浓度对系统的热力系数和热源可利用温差有较大影响。     

吸收式制冷技术的应用与发展

溴化锂吸收式制冷技术在我国得到了飞速发展和广泛应用。介绍了溴化锂吸收式制冷技术在我国应用情况,对单效机,双效机及直燃机的应用场合进行了分析,同时对溴化锂吸收式制冷技术将来的发展进行了展望。     

溴化锂吸收式制冷的耗能分析

<正> 一、引言传统的制冷是消耗电能,但为了大面积空间的空调,因电力紧张,迫使人们寻找不耗电的制冷技术,因而溴化锂吸收式制冷,得到迅速推广。国内不少杂志都发表文章,认为溴化锂制冷节电节能,并提出在热电联产机组上配置相     

太阳能液体吸收式制冷

利用太阳能制冷空调不外有两种方法,一是先实现光—电转换,再以电力推动常规的压缩式制冷机制冷;二是进行光—热转换,以热能制冷。前者系统比较简单,但以目前的价格计算,其造价约为后者的３—４倍。因此国内外的太阳能空调系统至今仍以第二种为主。太阳能光—热转换利用已经有了很大的发展,特别是在解决生活的需要方面,如生活热水、采暖、太阳房等。但这些应用在需求上其实与大自然的赐予并不完全一致：当天气越冷、人们越需要温暖的时候,太阳能量的提供往往不足。而太阳能空调的应用则正好与太阳能的供给大体上保持很好的一致性：…     

Exergy,economic and environment (3E) analysis of absorption chiller inlet air cooler used in gas turbine power plants

Gas turbine (GT) output power is affected by temperature, gas turbine inlet air‐cooling systems are used to solve this. In the present work, the effect of using absorption chiller in GT power plants for two regions in Iran, namely Tabas with hot–dry and Bushehr with hot–humid climate conditions is conducted. Therefore, output power, first and second law efficiencies, environmental and electrical costs for GT power plant with inlet air cooler are calculated for two mentioned regions, respectively. Results show that using this system in hot months of a year is economical. In addition, using absorption chiller leads to increasing the output power 11.5 and 10.3%, for Tabas and Bushehr cities, respectively. Moreover, by using this method the second law efficiency is increased to 22.9 and 29.4% for Tabas and Bushehr cities, respectively. In addition, the cost of electricity production for Tabas and Bushehr cities decreases to about 5.04 and 2.97%, respectively. Copyright © 2011 John Wiley & Sons, Ltd.     

Feasibility study of offshore wind turbine substructures for southwest offshore wind farm project in Korea

Korea has huge potential for offshore wind energy and the first Korean offshore wind farm has been initiated off the southwest coast. With increasing water depth, different substructures of the offshore wind turbine, such as the jacket and multipile, are the increasing focus of attention because they appear to be cost-effective. However, these substructures are still in the early stages of development in the offshore wind industry. The aim of the present study was to design a suitable substructure, such as a jacket or multipile, to support a 5 MW wind turbine in 33 m deep water for the Korean Southwest Offshore Wind Farm. This study also aimed to compare the dynamic responses of different substructures including the monopile, jacket and multipile and evaluate their feasibility. We therefore performed an eigenanalysis and a coupled aero-hydro-servo-elastic simulation under deterministic and stochastic conditions in the environmental conditions in Korea. The results showed that the designed jacket and multipile substructures, together with the modified monopile, were well located at soft–stiff intervals, where most modern utility-scale wind turbine support structures are designed. The dynamic responses of the different substructures showed that of the three substructures, the performance of the jacket was very good. In addition, considering the simple configuration of the multipile, which results in lower manufacturing cost, this substructure can provide another possible solution for Korean’s first offshore wind farm. This study provides knowledge that can be applied for the deployment of large-scale offshore wind turbines in intermediate water depths in Korea.     

大型汽轮发电机通风冷却方式研究

大容量汽轮发电机由于具有良好的经济性而成为电力工业和电机制造业的发展重点。汽轮发电机通风冷却方式与单机容量和性能之间存在制约的关系，是汽轮发电机向大容量、高参数发展时需要解决的关键问题之一。分析了汽轮发电机冷却方式的发展过程以及目前的发展状况和发展趋势，同时对不同冷却方式的特点和适用范围的进行了比较。     

发电厂直接空冷系统的可行性探讨

根据我国目前水资源的基本情况 ,阐明了建造空冷发电厂的必要性 ,多方面比较了直接空冷系统与湿冷系统的特点 ,以及由此带来的相应主设备选型上的差异。从技术经济学角度出发分析了水源对于冷却系统的重要性 ,结合具体实例分析了建设直接空冷机组的可行性 ,最后提出了一些探讨性的见解     

Design of CO2 absorption plant for recovery of CO2 from flue gases of gas turbine

The ongoing human-induced emission of carbon dioxide (CO₂) threatens to change the earth's climate. A major factor in global warming is CO₂ emission from thermal power plants, which burn fossil fuels. One possible way of decreasing CO₂ emissions is to apply CO₂ removal, which involves recovering of CO₂ from energy conversion processes. This study is focused on recovery of CO₂ from gas turbine exhaust of Sarkhun gas refinery power station. The purpose of this study is to recover the CO₂ with minimum energy requirement. Many of CO₂ recovery processes from flue gases have been studied. Among all CO₂ recovery processes which were studied, absorption process was selected as the optimum one, due to low CO₂ concentration in flue gas. The design parameters considered in this regard, are: selection of suitable solvent, solvent concentration, solvent circulation rate, reboiler and condenser duty and number of stages in absorber and stripper columns. In the design of this unit, amine solvent such as, diethanolamine (DEA), diglycolamine (DGA), methyldiethanolamine (MDEA), and monoethanolamine (MEA) were considered and the effect of main parameters on the absorption and stripping columns is presented. Some results with simultaneous changing of the design variables have been obtained. The results show that DGA is the best solvent with minimum energy requirement for recovery of CO₂ from flue gases at atmospheric pressure.     

新颖的核能燃气轮机总能系统的开拓性研究

基于系统综合和能的梯级利用的思路对核能燃气轮机总能系统开拓研究的进展,包括三方面：（1）提出若干高温气冷堆核能联合循环发电新系统;（2）开拓出两种核能联合循环多联产新系统;（3）探索出几种核电站联合循环技术更新改造新途径等;建立了完整的系统特性模型进行了模拟分析,揭示了它们的热力学特性,概括了各种用途的核电燃气轮机总能系统新系统,新方案的性能与特点。     

燃气轮机电站在石油炼制厂中的综合利用

本文对在石油炼制过程中燃气轮机电站与加热炉的联合运行作了初步探讨。对其经济性、可行性和联合装置中可能出现的一些问题进行了讨论。     

船舶汽轮机抽气器参与凝汽器背压调节的可行性研究

汽轮机凝汽设备及系统是重要的辅机设备及系统,而凝汽器背压对汽轮机的运行安全经济性及调节性能都有很大的影响。对于带自流装置的船舶汽轮机,在某些自流工况,循环水过量,采用循环水无法对凝汽器的背压进行调节,调节系统的功能存在一定的局限性。对此,本文对抽气器参与凝汽器背压调节的可行性进行研究,并建立了相应的控制模型进行仿真,验证了抽气器参与凝汽器背压调节的可行性,对凝汽器背压调节具有参考价值。     

大型汽轮发电机通风系统研究综述

为满足汽轮发电机不断地向大型化发展地需要，必须对大型汽轮发电机的通风系统进行优化设计，以提高其通风冷却效果。为此，国内外对影响汽轮发电机通风冷却状况的主要因素如冷却介质的流动与传热特性、不同通风系统的通风计算方法、通风系统的结构等进行了一系列理论分析和试验研究，并取得不少具有实际应用价值的成果。在对现有成果的分析和总结的基础上，指出了有待进一步研究之处。