太阳能系统、风冷热泵系统、燃气锅炉联合制热水的节能效益分析

文章针对海烟大酒店应用的太阳能、风冷热泵系统、燃气锅炉联合制热水系统进行阐述,通过理论分析与实践检验,分析了三者联合运行的节能效益,提出了适应海烟大酒店的最佳热水系统运行方式。     

空气源热泵与燃气锅炉辅助加热太阳能供热水系统的设计和应用

太阳能作为可再生能源,在建筑节能中越来越受到人们的重视.根据工程实例,分析和探讨空气源热泵和燃气锅炉辅助加热太阳能供热水系统的特点,应用范围,工作工况以及运行系统,力求实现太阳能热水器与建筑的优化设计,促进空气源热泵和燃气锅炉辅助加热太阳能热水技术在建筑领域的推广应用.     

太阳能热水公共浴室

近年来我国太阳热水器行业发展迅速,技术性能不断改善,种类和产量也逐渐增多,据资料,我国太阳热水器的产销量已均居世界第１位。太阳能热水公共洗浴系统由于具有清洁、节能等优势,日益得到人们的重视和欢迎。但是,部分已建成的太阳能热水公共洗浴系统造价过高、使用麻烦,严重制约了其推广和应用。目前,对这类系统的设计还没有具体的技术规范,在此,对太阳能热水公共洗浴系统（以下简称系统）的设计谈几点体会,供读者参考。１ 合理选择太阳热水器 目前,系统有３种常见形式：自然循环系统、强迫循环直热系统和强迫循环二次换热系统…     

空气源热泵辅助太阳能系统在学生公寓淋浴系统中的应用

在阐述太阳能热水系统及空气源热泵热水系统原理和优缺点的基础上,结合上海海洋大学学生公寓淋浴系统节能改造后的运行数据,对比分析改造前后的节能效果和经济效益,结果表明:改造后在满足学生正常洗澡的前提下,淋浴系统能耗下降了57%,能源费用下降了29.86%,效果十分显著。     

燃气锅炉供热系统节能技术与应用

今冬以来持续低温,北京市政府及时启动燃气供热突发事件应急预案,但天然气日用气量仍然持续突破5000万m3,已经危及到北京市燃气系统安全。本文通过调查分析燃气供暖系统存在的主要问题,介绍节能技术在燃气供热系统应用步骤和成功实例。     

太阳能热水系统在深圳某医院的应用

以深圳市宝安区沙井人民医院太阳能热水系统工程为例,阐述了太阳能热水系统的应用原理,并对运行成本、经济效益、环保效益进行了分析,该项目既节能又环保。     

太阳能联合城市燃气锅炉供暖系统的节能设计优化

研究太阳能联合城市燃气锅炉供暖系统的节能设计优化方案。设计集太阳能集热器、蓄热水箱、换热器、水泵、燃气锅炉等重要设备于一体的联合供暖系统,分析串联供暖与并联供暖组合方式,以及适用于联合供暖组合的太阳能单独供暖、同时供暖、燃气锅炉单独供暖三种供暖模式,采用TRNSYS构建串联供暖系统与并联供暖系统模型,对串联供暖系统与并联供暖系统节能设计进行比选,并从运行经济性角度出发优化联合供暖系统容量匹配节能设计。串联供暖系统节能设计比并联供暖系统节能设计的太阳能保证率高、系统性能好、系统能耗低。     

锅炉运行数据微机监测系统在燃气锅炉房中的应用

分析了锅炉运行数据监测系统的在燃气锅炉房成本核算和经济运行中的重要性、必要性;同时论述了监测系统原理、组成、硬件系统、监测软件、元器件选型以及运行效果。     

具有混合气体冷凝的燃气锅炉系统

介绍了常用的冷凝型锅炉结构,重点讨论分离式冷凝锅炉的特点。天然气锅炉烟气中含有相当比列水蒸汽,携带大量汽化潜热,与燃煤锅炉明显不同,提供了更大的余热利用空间。针对燃天然气热水锅炉,研制开发了采用烟气冷凝热能回收装置的锅炉系统并应用于实际。运行测试表明,改造的锅炉运行正常,提高锅炉热效率5%以上,节约大量天然气,同时吸收烟气中部分NOx,起到一定净化作用。本系统投资回收期短,节能与环保效益显著。     

燃气炉与太阳能联合采暖和制冷系统

介绍了燃气炉与太阳能联合采暖和制冷系统；阐述了太阳能采暖和制冷系统的设计方案、系统的构成、工作原理、主要的技术参数和控制方法；分析了系统的效率；提出了传统太阳能制冷系统的改造方法；给出了新型的太阳能冷一热并供系统；提出了本系统的技术特点，并指出了在使用中应注意的问题。     

WNS系列全自动燃气锅炉的研制

介绍针对气体燃料的特性而研制成功的WNS系列全自动燃气锅炉的技术特点。     

Theoretical study of a composite Trombe-Michel wall solar collector system

In this study, the transfer of solar radiation in a composite Trombe-Michel wall solar collector system is studied theoretically. The composite system consists of a glazing, a massive wall, and an insulating wall put together without a convection channel between glazing and wall and with one between massive and insulating walls. It is an improvement over the simple nonconvective Trombe-Michel wall solar collector system with a relatively low thermal resistance, which is taken as a reference. The theoretical results indicate that the composite system can indeed perform better in cold and/or cloudy climates than the reference system and that optimum geometrical parameters can be determined depending on the dwelling type and climatic conditions of the area. The new system has a reduced massive wall thickness that is a desirable feature for lightweight constructions.     

Test and evaluation of a solar powered gas turbine system

This paper describes the test and the results of a first prototype solar powered gas turbine system, installed during 2002 in the CESA-1 tower facility at Plataforma Solar de Almería (PSA) in Spain. The main goals of the project were to develop a solar receiver cluster able to provide pressurized air of 1000 °C and solve the problems arising from the coupling of the receivers with a conventional gas turbine to demonstrate the operability of the system. The test set-up consists of the heliostat field of the CESA-1 facility providing the concentrated solar power, a pressurized solar receiver cluster of three modules of 400 kWth each which convert the solar power into heat, and a modified helicopter engine (OST3) with a generator coupled to the grid. The first test phase at PSA started in December 2002 with the goal to reach a temperature level of 800 °C at the combustor air inlet by the integration of solar energy. This objective was achieved by the end of this test phase in March 2003, and the system could be operated at 230 kWe power to grid without major problems. In the second test phase from June 2003 to August 2003 the temperature level was increased to almost 1000 °C. The paper describes the system configuration, the component efficiencies and the operation experiences of the first 100 h of solar operation of this very successful first test of a solar operated Brayton gas turbine system.     

变频调速在锅炉给水系统的应用

变频调速技术以其显著的节能效果和可靠的控制方式 ,在水泵和风机系统中得到了广泛的应用。水泵变频控制在单台水泵供水中应用的较多 ,其技术也比较成熟 ,但在锅炉多台给水泵并联供水系统中 ,目前还不多见。为使变频调速技术在锅炉给水系统中得到安全可靠的应用 ,提高给水系统的经济性和自动化程度 ,针对我公司锅炉给水系统的特点 ,进行了变频调速恒压供水节能改造 ,并且取得了较好的经济效益。1　我公司锅炉给水系统现状我公司现有二台 6 5ｔ/ｈ ,三台 35ｔ/ｈ锅炉 ,给水系统由四台型号为ＤＧ4 6— 5 0× 12 ,三台型号为ＤＧ85 - 6 7× 9给…     

DCS系统在循环流化床锅炉上的应用

随着计算机集散控制系统 (DCS)技术的发展 ,系统可靠性的提高和价格的下降 ,改变了只有大电厂才使用DCS的状况 ,使系统运用于小型热电厂成为可能。与常规仪表比较 ,DCS系统大大提高了热电厂控制的可靠性、安全性和经济性。本文以石狮热电有限公司 3号 75t/h循环流化床锅炉及 6MW汽轮机组使用DCS系统控制为例 ,介绍采用DCS控制的各项优势和功能     

Performance of a solar air composite heat source heat pump system

For the shortcoming of air source heat pump in heating condition, a composite heat exchanger was designed which integrates fin tube and tube heat exchanger, and it can achieve synchronous and composite heat exchange in one heat exchanger between working fluids, gaseous and liquid heat source. With the above composite heat exchanger as the core component, the Solar Air Composite Heat Source Heat Pump System (SACHP) was developed which has three working modes, including single solar heat source mode, single air heat source mode and solar air dual heat sources mode. A SACHP experiment table was established and conducted a comprehensive experimental study of three working modes of this system in the standard enthalpy difference laboratory. The results show that when the ambient temperature was −15 °C, compared to the single air heat source mode, the dual heat source mode increased 62% in heat capacity and 59% in COP; when the temperature difference of combined heat transfer was 5 °C, compared to the single air heat source mode, the dual heat source mode increased 51% in heat capacity and 49% in COP. Experimental results demonstrate that the application of the solar air composite heat pump technology can accelerate the application process of the solar heat pump in air conditioners for buildings.     

Evaluation of retrofitting a conventional natural gas fired boiler into a condensing boiler

The exit flue gas temperature of a conventional gas fired boiler is usually high and a great amount of heat energy is lost to the environment. If both sensible heat and latent heat can be recovered by adding a condensing heat exchanger, the efficiency of the boiler can be increased by as much as 10%. In this paper, based on combustion and heat transfer calculations, the recoverable heat and the efficiency improvement potential of different heat recovery schemes at various exit flue gas temperatures are presented by performing design calculations. The payback period method has been used to analyze the feasibility of retrofitting a conventional gas fired boiler into a condensing boiler in a heating system in detail. The results show that the most economical exit flue gas temperature is 40–55 °C when a conventional natural gas fired boiler is retrofitted into a condensing boiler simply by adding a condensing heat exchanger. It is feasible to use the return water of a heating system as the cooling medium of the condensing heat exchanger because the return temperature varies with the ambient temperature and is lower than the dew point of the water vapor in the flue gas in most periods of a heating season in some regions, which has been verified by retrofitted case.