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热水余热饱和蒸汽汽轮机的初终参数选择
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作者 王晓峰 《机械工程师》 2013年第3期171-172,共2页
热水余热饱和蒸汽汽轮机受热水温度和排汽湿度的限制,不能选择较高的初压、初温。一般应尽可能地选择较低的主汽压力和背压,以期获得更大的效益。
关键词 热水余热 饱和蒸汽汽轮机 初终参数选择
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VCM合成热水塔余热利用可行性研究与实践 被引量:1
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作者 曹国玉 《中国氯碱》 CAS 2022年第7期54-59,共6页
介绍了电石法生产氯乙烯过程中合成热水塔余热利用存在的问题,提出改进热水塔余热利用的可行措施,同时通过改变热水塔热水温度,减少在转化过程产生的副产蒸汽,不仅实现余热的充分利用,而且降低生产用水的消耗,消除了系统的排气噪音,综... 介绍了电石法生产氯乙烯过程中合成热水塔余热利用存在的问题,提出改进热水塔余热利用的可行措施,同时通过改变热水塔热水温度,减少在转化过程产生的副产蒸汽,不仅实现余热的充分利用,而且降低生产用水的消耗,消除了系统的排气噪音,综合经济效益和环境效益极为可观。 展开更多
关键词 热水余热 乏汽回收 制冷效率 优化改造
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供暖余热型热水锅炉故障分析及防护
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作者 董自春 邹建鹏 《中国设备工程》 2016年第4期53-54,共2页
介绍了余热型热水锅炉与普通热水锅炉存在的差异,对锅炉超压、管线水锤现象和管道内腐蚀等共性的故障问题,提出了可行的防护方法,有助于司炉工人对该型锅炉特性的掌握,保证供暖锅炉的正常可靠运行。
关键词 余热热水锅炉 三通挡板阀 超压 水锤现象 腐蚀
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余热发电两级能量转换系统的研究 被引量:1
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作者 吴治坚 龚宇烈 +1 位作者 骆超 马伟斌 《可再生能源》 CAS 北大核心 2010年第5期91-95,共5页
为提高余热发电的经济性,提出余热热水发电的两级能量转换系统,并建立了该系统的两级闪蒸和两级双工质循环的热力计算的数学模型;对电站的功率和效率进行了计算,以此对单级及两级能量转换系统进行了比较。结果表明:在计算所给的热水温度... 为提高余热发电的经济性,提出余热热水发电的两级能量转换系统,并建立了该系统的两级闪蒸和两级双工质循环的热力计算的数学模型;对电站的功率和效率进行了计算,以此对单级及两级能量转换系统进行了比较。结果表明:在计算所给的热水温度(100~200℃)和冷凝温度下,两级闪蒸比单级闪蒸的发电量多24.8%~31.2%;两级双工质循环比单级双工质循环的发电量多14.5%~24.0%;两级闪蒸比两级双工质循环的发电量多7.2%~67.5%。 展开更多
关键词 余热热水发电 两级能量转换系统 闪蒸系统 双工质循环
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基于燃气内燃机冷热电联供系统的技术及经济分析
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作者 许回江 任晓莉 张国争 《沈阳工程学院学报(自然科学版)》 2015年第2期123-127,共5页
针对某工业园区电力及空调负荷的实际需求,分析研究了其采用燃气内燃机冷热电联供系统的技术与经济可行性。在此基础上,分析了影响冷热电联供系统运行可靠性与经济性的主要因素,并提出了运行工艺与系统设备配置的优化方式。
关键词 燃气内燃机 冷热电联供 烟气热水余热直燃机 余热利用 并联运行
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余能利用新技术
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《东北电力技术》 2004年第2期52-52,共1页
关键词 余能利用 能源 余热蒸汽 余热热水 废热利用
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Performance and Optimization for a Ground-Coupled Liquid Loop Heat Recovery Ventilation System 被引量:1
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作者 周亚素 Per FAHLEN Torbjrn LINDHOLM 《Journal of Donghua University(English Edition)》 EI CAS 2007年第6期749-755,共7页
Ground-coupled heat pumps(GCHP)are commonly used in residential heating system.To mitigate the boreholes temperature dropping with operating time,a new exhaust-air recharging system is developed.The new recharging sys... Ground-coupled heat pumps(GCHP)are commonly used in residential heating system.To mitigate the boreholes temperature dropping with operating time,a new exhaust-air recharging system is developed.The new recharging system can be used in three operational modes.In this paper,a ground-coupled heat recovery ventilation(HRV)model is discussed.A thermal model is set up to find the optimal brine flow rate and heat transfer allocation ratio between exhaust and supply coils for maximum heat recovery efficiency.Contrary to the conventional liquid-loop HRV systems,the brine temperature entering the exhaust coil never goes blow zero(0℃),and hence defrosting is needless in the ground-coupled HRV system.This can make the ground-coupled HRV system over 20% more efficient than a conventional HRV system at low outdoor temperatures. 展开更多
关键词 a ground-coupled HRV system thermal model heat recovery efficiency coils allocation ratio brine flow rate
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节能型能源走进百姓家
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作者 闻波 《北京电子》 2004年第11期41-41,共1页
一般家庭如按三口计算,每年热水用量约为30吨,所耗能源相当可观,采用节能型生活热水系统将是一项十分重要的工作,据最近对几种系统的考察证实,它们比使用传统的电能和燃气供热节约近50%;且能使太阳能的集热效率达到60%~80%,... 一般家庭如按三口计算,每年热水用量约为30吨,所耗能源相当可观,采用节能型生活热水系统将是一项十分重要的工作,据最近对几种系统的考察证实,它们比使用传统的电能和燃气供热节约近50%;且能使太阳能的集热效率达到60%~80%,可以全天候提供生活热水。 展开更多
关键词 太阳能 节能型生活热水系统 分体式空气系统 余热中央热水系统
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Electricity Generation from Low Temperature Waste Heat with Application to Hydrogen Production from Water
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作者 R. Subramaniam J.C. Prindle C. Investigator V.J. Law 《Journal of Energy and Power Engineering》 2010年第1期1-10,共10页
This paper presents an extensive study of the heat pump cycle and associated working fluids to generate electricity from low temperature industrial waste heat. An Aspen Plus simulation has been developed to evaluate t... This paper presents an extensive study of the heat pump cycle and associated working fluids to generate electricity from low temperature industrial waste heat. An Aspen Plus simulation has been developed to evaluate the effect of various working fluids on the net heat pump efficiency over a wide range of turbine inlet temperatures between 50℃ and 250℃. One hundred eight (108) refi'igerants were investigated from the environmental classifications of Hydrochlorofluorocarbons (HCFC), Hydrofluorocarbons (HFC), Chlorofluorocarbons (CFC) and Hydrocarbons (HC) with boiling points between -88.65 ℃ and 110.65℃. Net efficiency, which ranged from 0.1% to 25.8% in this work tends to increases with the temperature of the waste heat. Results of the present study demonstrate that working fluid R41 (with source temperature of 44 ℃) provides the maximum efficiency among those evaluated. Refrigerants R13B1 and R32 provide the best efficiency for waste heat source temperatures ranges 60 - 67 ℃ and 68 - 78℃ respectively. Ammonia shows the highest efficiency from 79℃ to 132 ℃. Refrigerants R31, R21, 17,30 and benzene perform well in the temperature ranges 133-151 ℃, 152-178 ℃, 179-236℃ and 237-250 ℃respectively. The optimal heat pump systems are applied to the hybrid copper sulfate-copper oxide thermochemical cycle for hydrogen production from water. 100.8 MW of electrical energy is produced, which increased the efficiency from 24.1% to 25.9%. 展开更多
关键词 Heat pump working fluid REFRIGERANTS net efficiency waste heat thermochemical cycles hydrogen production.
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Mathematical Simulation of Lithium Bromide Solution Laminar Falling Film Evaporation in Vertical Tube 被引量:3
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作者 Chengming Shi YangWang Huili Hu YingYang 《Journal of Thermal Science》 SCIE EI CAS CSCD 2010年第3期239-244,共6页
For utilization of the residual heat of flue gas to drive the absorption chillers,a lithium-bromide falling film in vertical tube type generator is presented.A mathematical model was developed to simulate the heat and... For utilization of the residual heat of flue gas to drive the absorption chillers,a lithium-bromide falling film in vertical tube type generator is presented.A mathematical model was developed to simulate the heat and mass coupled problem of laminar falling film evaporation in vertical tube.In the model,the factor of mass transfer was taken into account in heat transfer performance calculation.The temperature and concentration fields were calculated.Some tests were conducted for the factors such as Re number,heating flux,the inlet concentration and operating pressure which can affect the heat and mass transfer performance in laminar falling film evaporation.The heat transfer performance is enhanced with the increasing of heat flux.An increasing inlet concentration can weaken the heat transfer performance.The operating pressure hardly affects on heat and mass transfer.The bigger inlet Re number means weaker heat transfer effects and stronger mass transfer.The mass transfer obviously restrains the heat transfer in the falling film solution.The relation between dimensionless heat transfer coefficient and the inlet Re number is obtained. 展开更多
关键词 lithium bromide solution REFRIGERATION falling film EVAPORATION heat and mass transfer
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