燃烧参数影响高温空气燃烧特性的数值分析

高温空气燃烧技术具有高效节能和低NOx排放等多重优越性，是一种新型燃烧技术。为了深入研究高温空气燃烧机理和低氮氧化物排放特性，将湍流N—S方程与扩散燃烧模型和热力型NO生成模型相结合，研究了低氧浓度条件下，燃烧参数，如燃气供应量，过量空气系数，进口空气预热温度以及进口空气氧含量对燃烧的影响，为发展高温空气燃烧技术提供了理论依据。     

低NOx高温空气燃烧技术

低NOx高温空气燃烧技术将传统的低NOx燃烧技术与高温热式燃烧系统有地结合起来，具有热效率高、炉内温度分布均匀、NOx排放量低等特点。本文介绍了高温空气燃烧技术，重点分析了高温空气燃烧技术中的低NOx排放的原理，并对两种采用烟气再循环和分级燃烧技术的NOx高温空气燃烧器进行阐述。     

高温空气燃烧技术的开发应用、技术优势及其展望

高温空气燃烧技术和高温空气气化技术是当前世界节能与环保领域中的两大新技术,二者均采用高于燃料着火点温度的高温空气作氧化剂或气化剂。介绍了利用蓄热式高温烟气余热回收装置和专门的高温空气发生器产生高温空气的方法,前者主要用于高温空气燃烧技术,后者主要用于高温空气气化技术。概括了高温空气燃烧技术和高温空气气化技术的应用状况,总结了其技术优势,并指出高温空气燃烧技术和高温空气气化技术符合中国国情,具有巨大的开发潜力和广阔的市场前景。     

高温空气燃烧燃气热态试验炉非稳态数值模拟

采用双方程湍流模型、概率密度函数(PDF)燃烧模型和离散坐标(DO)辐射模型，对采用高温空气燃烧技术的燃气热态试验炉炉内工况进行了非稳态数值模拟，预测热态试验炉运行时的炉内温度场、组分场和速度场，由数值模拟结果分析比较了不同喷口间距五喷口燃烧器对炉内工况的影响，为采用高温空气燃烧技术的燃气燃烧器设计提供参考。     

高温空气燃烧技术

高温空气燃烧技术是一项燃烧领域的高新技术。具有不同于传统燃烧技术的新特点。燃料在1200℃高温空气和氧浓度约5％的炉内环境中燃烧，达到高效低污染物排放的要求。本文简要介绍了该技术的基本原理和其中的关键技术，以及最新的低NOx高温空气燃烧器。     

高效蓄热式燃烧系统在轧钢加热炉上的应用研究

介绍了采用高温空气燃烧(HTAC)技术所设计的高效蓄热式燃烧系统，分析了该燃烧系统在轧钢加热炉上的应用效果，指出了采用HTAC技术进一步优化蓄热式燃烧系统的设计基本思路。     

高温低氧燃烧条件下氮氧化物的生成特性

高温低氧燃烧原理是高温空气燃烧技术赖以发展的基础，使得高温燃烧条件下的氮氧化物的生成与排放受到大大抑制。为了掌握这种非常规燃烧现象及污染物生成的基本规律，采用扩散燃烧模型、热力NO生成模拟与湍流N－S方程，数值研究了燃烧空间中空气氧浓度对燃烧特性和氮氧化物排放浓度的影响，再现了高温与低氧两种条件相结合，形成的稳定的低氮氧化物排放的燃烧特性。计算结果与实验数据吻合，为发展高温空气燃烧技术提供了理论基础。     

烟气再循环实现HTAC技术的超低NO_X排放

介绍了一种通过烟气再循环的方法来实现高温空气燃烧 ( HTAC)蓄热式锻造炉上超低 NOX排放的技术 ,并对高温空气燃烧的机理作了初步的探讨。     

高温空气燃烧技术的特点与发展现状

通过对现今高温空气燃烧方面文献的总结,得到了高温空气燃烧技术及高温空气燃烧系统的特点、发展和国内外应用研究现状。并对高温空气燃烧的发展提出了自己的一点看法,期望高温空气燃烧能够实现大型化,结构简单化,以拓宽其应用领域。     

高温空气燃烧技术(HTAC)及其应用效果

高温空气燃烧技术是近十年来高速发展的一种新型燃烧技术，因同时具有高效、节能和低污染等特性，目前正得到越来越广泛的应用。本文介绍了高温空气燃烧技术的由来、工作原理、特点及应用效果，并分析了这种燃烧技术在我国的应用前景。     

太阳能吸收式空调系统的经济性分析

针对一个特定的对象,进行了太阳能吸收式空调系统寿命周期内的模拟计算及影响因素的分析,结果表明：（1）单纯太阳能空调（无采暖与热水供应）的经济性很差,太阳能空调与供热的复合系统的经济性要优于单纯的太阳能空调系统;（2）太阳能采暖与空调的复合系统,采暖与供冷的负荷比对系统的经济性有很大影响,即使在最佳的负荷比时仍无法和常规的系统竞争;（3）太阳能与生活热水系统的负荷系统中,热水负荷所占比重越大,经济性越好,当太阳能空调使用生活热水系统夏季多余的热量时,太阳能空调系统经济上可以和天然气锅炉＋电动制冷机竞争,并具有很好的节能性和环境效益。     

Parametric study of various configurations of hybrid PV/thermal air collector: Experimental validation of theoretical model

In this paper, an attempt has been made to evaluate the overall performance of hybrid PV/thermal (PV/T) air collector. The different configurations of hybrid air collectors which are considered as unglazed and glazed PV/T air heaters, with and without tedlar. Analytical expressions for the temperatures of solar cells, back surface of the module, outlet air and the rate of extraction of useful thermal energy from hybrid PV/T air collectors have been derived. Further an analytical expression similar to Hottel–Whiller–Bliss (HWB) equation for flat plate collector has also been derived in terms of design and climatic parameters. Numerical computations have been carried out for composite climate of New Delhi and the results for different configurations have been compared. The thermal model for unglazed PV/T air heating system has also been validated experimentally for summer climatic conditions. It is observed that glazed hybrid PV/T without tedlar gives the best performance.     

A transient test method applied to air heating collectors

In many parts of the world steady state testing outdoors can only be done on a few days in the year. A transient test method has recently been developed that overcomes this problem. It has been specified only in relation to liquid heating collectors. We have tried it on air heating collectors and have found that it yields an efficiency curve that resembles that which would have been obtained under steady state conditions equal to the average of the transient ambient conditions. We have also found that the time interval central to the transient analysis has to be defined in a different way for air heating collectors than for liquid heating collectors.     

Solar air heater applications in India

Solar air heaters of many types have been developed in India and their performance studied in detail. The application of these air heaters are limited to a few demonstration projects for food dehydration, and space heating. Some of these case studies are described in this paper. For a few cash crops, the potential of solar air heaters for the drying process has been assessed in detail. Space heating by solar air heaters and their use for natural ventilation has also been discussed and results of a theoretical study presented to make out a case for more intensive research in the fields of solar air heater applications in India.     

回转式空气预热器风烟焓增模型及其效率分析

1前言回转式空气预热器的缺点是漏风率大,漏风使能量损耗,回转式空气预热器效率由于漏风而降低,整个机组的效率也受到影响。在1963年,Frass和Ozisik指出[1],空气预热器的漏风量将影响锅炉效率和汽轮机的输出功率。Bejan等人提出漏风量直接影响的是空气预热器换热效率[2],对机组     

The influence of different ground covers on the heating potential of earth-to-air heat exchangers

Ten years' hourly measurements of air and ground temperature values at various depths below bare and short grass soil at Dublin Airport have been used in order to investigate the impact of different ground surface boundary conditions on the efficiency of a single and a multiple parallel earth-to-air heat exchanger system. The heating potential of both these systems buried under bare soil has been assessed and compared with the heating potential of the same systems buried under short-grass-covered soil. The results of this comparison revealed that soil surface cover might be a significant controllable factor for the improvement of the performance of earth-to-air heat exchangers. The heating system consists of a single pipe or multiple parallel pipes laid horizontally, through which ambient or indoor air is propelled and heated by the bulk temperature of the natural ground. The dynamic thermal performance of these systems during the winter period and their operational limits have been calculated using an accurate numerical model. Finally, a sensitivity analysis was performed in order to investigate the effect of the main design parameters, such as pipe length, pipe radius, air velocity inside the tube and the depth of the buried pipe below the earth's surface, on the system heating capacity. Cumulative frequency distributions of the air temperature at the pipe's exit have been developed as a function of the main input parameters.     

低温辐射加热炉

本文阐述了低温辐射加热的基本原理和低温辐射传热及加热温度均匀的技术,以此为基础设计出新型干燥炉——低温辐射加热炉。该炉用同一个热源进行辐射与热风复合加热,它既适用于簿的、形状简单的工件加热,又适用于厚的、形状复杂的超大工件的加热。     

Efficiency of solar plate air heaters

The efficiency of a solar air heating collector (SHC) has been investigated using a very simple nonstationary plate heating model. It is shown that the time to reach to the operating efficiency in the SHC is quite long. It is found that in the air heating temperature range 40–60 °C the stationary efficiencies of the SHC can be from 0.5 to 0.37.     

鞍山千山地区地热结合热泵供暖的应用前景分析

根据鞍山千山地区地热水资源及利用情况，针对3万m^3的供热面积，采用地热热泵以充分利用地热尾水的方案，进行了技术经济分析。     

利用水冷机组全年空调的可行性分析

本文提出了一种可使用水冷冷水机组同时实现夏季制冷和冬季供热的中央空调系统冷热源方案。其在夏季运行时具有水冷冷水机组制冷系数高的特点而冬季又能象风冷热泵机组一样以热泵方式工作。初步分析表明其在中南部地区全年能耗低于风冷热泵机组，具有一定的应用价值，可作为空调冷热源方案的一种新选择。