热水余热制冷技术在塔河油田溴冷机中央空调上的应用

对塔河油田发电一厂余热锅炉高温段出水夏季热用户不足,存在热能浪费,难以寻找突破口以增加热用户等问题,通过应用热水余热利用技术,设计热水型溴化锂制冷机中央空调系统,取代已有直燃型溴冷机系统,节约了燃气费、电费等。在夏季热用户锐减形势下增加了热用户,确保余热锅炉平稳运行。完成了中石化"能效倍增计划"2014年立项项目之一。     

中央空调制冷机组废热回收技术在宾馆的应用

介绍利用中央空调制冷机组制冷废热来替代锅炉生产宾馆生活用热水的实例,指明热回收技术在宾馆的应用前景.该技术具有成熟、可靠,技术改造成本低,投资回收期短的特点.     

“制冷、制热、卫生热水”型空气源热泵系统及分析

提出一种小型中央空调用“制冷、制热、卫生热水”型空气源热泵系统设计方案,能够利用空调部分冷凝热提供生活用卫生热水,该系统可与家用中央热水系统连接。     

中央空调冷凝器制冷剂R290改造的风险分析

针对中央空调冷水机组中的冷凝器更换制冷剂品种的改造,本文简要介绍了新型环保制冷剂R290替代R22的优点和不足,重点对中央空调冷凝器制冷剂R290改造所带来的风险进行了详细的分析,并提出了相应的风险防范措施。     

中央空调的变频器设计及节能探究

在中央空调系统的设计中,如何节约能耗是一个最为重要的环节。中央空调节约能耗的一个典型发展方向就是应用变频技术。根据在中央空调领域长期的工作经验对其系统的各个部分的变频控制进行了分析,并且分析了这样设计的节能原理。     

中央空调余热回收在宾馆酒店中的应用

介绍利用中央空调运行时产生的废热回收后生产出生活热水，对原有热水系统进冀改造，并对系统改造后的运行情况进行分析总结，从节能、环保、经济三方面说明了中央空调余热回收的可行性。     

蒸发式冷凝器在啤酒生产中的应用效果

为了降低电耗和水耗、减少环境污染和保障运行安全,对啤酒生产冷冻站设备进行了技术改造,用蒸发式冷凝器代替立式冷凝器.通过对蒸发式冷凝器与原立式冷凝器的运行情况对比,系统地分析了技术改造带来的节能减排效果和经济效益.     

中央空调冷凝器腐蚀失效分析与对策

南海某采油船中央空调冷凝器发生泄漏,影响了船上的生产和生活。对冷凝器失效原因进行简要分析,并提出解决措施。     

新型多功能良性循环空调器系统

本文在对变频热泵空调系统进行深入研究的基础上。提出了以多介质冷凝器为中心的空调生活热水系统；     

压缩蒸发式中央空调系统余热利用的前景

在调研的基础之上 ,论述了大中型中央空调余热利用的前景并依据实际测的结量提出了中央空调在余热利用技改方面应注意的问题 ,作者认为余热利用的技术改造对提高中央空调系统运行的可靠性和经济性是有益的     

建筑一体化太阳热水系统热计费问题研究

运用成本收入评价法,针对集中-分散式和集中式两种设置形式,分别采用电、燃气、热泵辅助加热,分析了全天候太阳热水系统的经济可行性,并以上海某36户住宅楼为例,进行了具体分析和评估。还提出了全天候太阳供热水系统的热计费标准,并针对集中-分散式和集中式设置模式,计算了分别采用电、燃气、热泵辅助加热的全天候太阳热水系统的具体的年付热水费用。研究结果可以为实际工程中太阳热水系统的评价和热收费提供依据。     

新型锅壳式水火管燃煤热水锅炉的结构设计述评

通过介绍一台29MW锅壳式水火管燃煤热水锅炉的结构、水系统、烟气流程的技术特点,进一步说明新型锅壳式水火燃煤热水锅炉在大容量热水锅炉的发展及优势。     

高校学生生活区太阳能热水系统设计

本文以上海海洋大学新校区大学生生活区太阳能热水系统工程为例,首先通过生活区热水需求量的要求计算了太阳能热水负荷,进而确定了集热器面积.其次介绍了主要设备的选型、系统运行方案和控制系统设计,最后通过实测燃气消耗量分析了其节能效果.分析结果表明,太阳能热水系统节能40%～56%,说明所进行的太阳能热水工程设计是成功的.本设...     

Electricity,hot water and cold water production from biomass. Energetic and economical analysis of the compact system of cogeneration run with woodgas from a small downdraft gasifier

Wood gasification technologies to convert the biomass into fuel gas stand out. On the other hand, producing electrical energy from stationary engine is widely spread, and its application in rural communities where the electrical network doesn’t exist is very required. The recovery of exhaust gases (engine) is a possibility that makes the system attractive when compared with the same components used to obtain individual heat such as electric power. This paper presents an energetic alternative to adapt a fixed bed gasifier with a compact cogeneration system in order to cover electrical and thermal demands in a rural area and showing an energy solution for small social communities using renewable fuels. Therefore, an energetic and economical analysis from a cogeneration system producing electric energy, hot and cold water, using wooden gas as fuel from a small-sized gasifier was calculated. The energy balance that includes the energy efficiency (electric generation as well as hot and cold water system; performance coefficient and the heat exchanger, among other items), was calculated. Considering the annual interest rates and the amortization periods, the costs of production of electrical energy, hot and cold water were calculated, taking into account the investment, the operation and the maintenance cost of the equipments.     

29 MW燃天然气热水锅炉设计特点

详细介绍了２９ＭＷ热水锅炉的设计特点。分述了锅炉水冷壁系统、包墙系统、省煤器系统、燃烧系统等的设计思路和参教,强调了燃气锅炉结构紧凑的特点和经济性。     

Performance analysis of a trigeneration system based on a micro gas turbine and an air-cooled,indirect fired,ammonia–water absorption chiller

The objective of this paper is to experimentally determine the efficiency and viability of the performance of an advanced trigeneration system that consists of a micro gas turbine in which the exhaust gases heat hot thermal oil to produce cooling with an air cooled absorption chiller and hot water for heating and DHW. The micro gas turbine with a net power of 28 kW produces around 60 kW of heat to drive an ammonia/water air-cooled absorption chiller with a rated capacity of 17 kW. The trigeneration system was tested in different operating conditions by varying the output power of the micro gas turbine, the ambient temperature for the absorption unit, the chilled water outlet temperature and the thermal oil inlet temperature. The modelling performance of the trigeneration system and the electrical modelling of the micro gas turbine are presented and compared with experimental results. Finally, the primary energy saving and the economic analysis show the advantages and drawbacks of this trigeneration configuration.     

充水排气式自然真空太阳能海水淡化系统的实验研究及经济分析

提出了一种充水排气式的自然真空太阳能海水淡化系统,介绍了其结构及工作原理.当蒸发器内产生不凝气体时,利用水泵向蒸发器充水从而排出不凝性气体,具有能耗低、运行可靠等优点.搭建了实验样机,通过稳态实验研究了系统在不同运行温度时的产水性能.实验结果表明,产水量和性能系数随着热海水温度的增加而增加.当供热海水质量流量为0.1 ...     

Sustainability estimation of energy system options that use gas and renewable resources for domestic hot water production

Two possible substitutions for fossil fuel used in heat production are biomass and solar energy. This paper presents an evaluation of various energy sources for hot water production in a heating plant. The heating plant was situated in one of the largest municipalities in the city of Belgrade, Serbia. It produces and delivers domestic hot water and energy for heating to approximately 17,000 households. It is possible to use of using renewable energy instead of fossil fuel for producing the thermal energy for the supply of domestic hot water. Hence, in this paper, an evaluation of the sustainability of different energy options for obtaining thermal energy was considered: 1) from gas combustion; 2) from gas combustion and solar collection 3) from biomass combustion 4) from gas and biomass combustion, and 5) from gas and biomass combustion and solar collection. To compare the different energy systems, the method of multi-criteria analysis was utilised. This method integrates various multi-dimensional criteria and provides an efficient method of estimating the sustainability of complex systems. The obtained results were compared by the General Index of Sustainability which is a measure of the complexity of a system. A basic set of energy indicators that relate to different aspects of sustainable development was defined. In this way, the results in the assessment of sustainability of energy options do not depend on the various analysts in decision making.     

大容量燃气热水锅炉运行状况调研及对策

在对新疆乌鲁木齐市大容量燃气热水锅炉运行状况调研的基础上,指出了运行过程中发现的主要问题及其原因,从锅炉结构设计、炉膛及管束振动消除、冷凝及其防控和供热系统调控等多个方面分析并提出了预防措施和对策,为我国未来大容量燃气热水锅炉的设计及长周期安全高效运行提出切实可行的建议。     

Performance of a gas engine driven heat pump for hot water supply systems

The present work aimed at evaluating the experimental performance of a gas engine heat pump for hot water supply. In order to achieve this objective, a test facility was developed and experiments were performed over a wide range of ambient air temperature (10.9-25.3 °C), condenser water inlet temperature (33-49 °C) and at two engine speeds (1300 and 1750 rpm). Performance characteristics of the gas engine heat pump were characterized by water outlet temperatures, total heating capacity and primary energy ratio. The reported results revealed that hot water outlet temperature between 35 and 70 °C can be obtained over the considered range of the operating parameters. Also, total heating capacity and gas engine heat recovery decrease by 9.3 and 27.7%, respectively, while gas engine energy consumption increases by 17.5% when the condenser water inlet temperature changes from 33 to 49 °C. Total heating capacity, gas engine heat recovery and gas engine energy consumption at ambient air temperature of 25.3 °C are higher than those at ambient air temperature of 10.9 °C by about 10.9, 6.3 and 1.5% respectively. Moreover, system primary energy ratio decreases by 15.3% when the engine speed changes from 1300 to 1750 rpm.