发电厂双曲线自然通风冷却塔的噪声治理

本文以杭州华电半山发电有限公司3X390MW燃气机组配套的两台大型双曲线自然通风冷却塔噪声治理为例,通过采用隔吸声屏障对冷却塔进行降噪处理,解决了大型双曲线自然通风冷却塔噪声超标的问题。     

特大型双曲线自然通风冷却塔噪声治理

本文以上海吴泾电厂八期1#、2#机组所用特大型双曲线自然通风冷却塔为例,介绍其噪声特性、控制措施及治理效果。     

大型自然通风冷却塔环境影响的预测分析研究

大多数内陆核电厂将采用大型自然通风冷却塔作为其二次循环冷却方式,本文基于美国核管会推荐的SACTI程序,给出了该模型的基本原理和框架结构,并以江西彭泽核电厂为例,采用该程序预测分析了该核电厂大型自然通风冷却塔所造成的雾羽和太阳辐射损失的影响。并进一步研究了不同环境风速、相对湿度条件下对冷却塔造成的太阳辐射损失的影响。SACTI模型可以根据厂址逐时气象观测数据,较好地计算可见雾羽的长度、抬升高度和太阳辐射损失,其结果可以作为冷却塔环境影响评价的依据。     

机力通风冷却塔噪声控制

机力通风冷却塔广泛应用于CBD等大型公共建筑中的中央空调循环冷却水系统,其运行时的噪声对周边环境的影响很大。文章针对机关办公楼使用的3组共7台机力通风冷却塔,通过声学仿真技术,定量分析了冷却塔对周边环境的噪声影响,提出了综合治理方案,并预测评价了治理效果;方案实施后进行了测量,并与预测评价进行对比分析,结果显示,方案设计阶段的仿真预测结果与实测结果基本相吻合,仿真模型准确可靠。     

电厂大型机力通风冷却塔噪声控制浅析

大型机力通风冷却塔广泛应用于电力、钢铁、石油化工等工业企业,其运行时产生的噪声对周边环境的影响较大。文章针对大型机力通风冷却塔的噪声特性,提出了有效的降噪措施,并结合实际案例,利用Cadna/A噪声软件进行定量模拟分析,据此制定科学合理的降噪方案,为大型机力通风冷却塔的噪声控制提供了思路。     

下沉式冷却塔的噪声综合治理

在高层、超高层和商业综合体建筑内,冷却塔是中央空调制冷系统中的重要组成部分,同时也是制冷系统中噪声和振动的主要贡献者.为了达到空间利用的最大化,冷却塔一般被安置在裙楼、设备层或楼顶,但在一些特殊情况下,冷却塔被安置在地下室,这种下沉式的安装方式,给冷却塔的进排气带来一些特殊要求,同时也给降噪处理带来很大难度.通过具体案...     

夜间自然通风降低办公室空调制冷能耗

夜间自然通风已经成功运用于许多被动制冷或低能耗写字楼中。介绍了夜间自然通风在写字楼中的适用性。在适当的温度条件下,建立热量计通风模型,以此来检验节能以及内部舒适度改善情况。研究发现,自然通风模式能够减少传统空调写字间的制冷能耗。采用"应用最佳"的原则,如提高气密性、内部发热及日晒生热的最小化等改善建筑结构能有效提高自然通风的节能性。     

喷雾推进通风冷却塔的节能创新

简介了冷却塔的发展及现状,分析了传统普通电驱动冷却塔存在的缺陷,以及喷雾推进通风冷却塔在节能创新方面的优势。     

防冻降雾节水型冷却塔

<正>由清华大学和河南省沁菱冷却设备有限公司联合开发的防冻降雾节水型冷却塔,适用于石油、石化、煤化工、冶金、纺织、造纸、火力发电及制冷空调等所有使用冷却塔的行业。主要技术内容一、基本原理防冻降雾节水型冷却塔综合了传统湿式冷却塔和空气冷却器的特点,在收水器上方塔体侧壁开设上进风口,在上进风口紧贴内侧设置空气预冷器,与常规湿式冷却塔不同,需要冷却的循环水首先进入各空气预冷器     

低温环境试验系统中冷却塔的设计计算

本文对低温环境模拟试验系统中的循环冷却水子系统的主要部件——冷却塔,进行了设计计算。通过对冷却系统的用水温度和用水量的分析,在对冷却塔热力计算的基础上,确定了冷却塔的冷却数和特性数,进而得到了符合冷却水系统要求的冷却塔的相关技术指标和型号。     

城市电厂大型机力通风冷却塔的噪声控制

针对城市电厂大型机力通风冷却塔的噪声污染,以北京太阳宫燃气热电冷联供工程中应用的机力通风冷却塔噪声控制为例,通过分析研究冷却塔各声源不同的频谱特性和传播特性,并根据厂界噪声控制目标计算声源的超标量和设计降噪量,采取隔声、消声和吸声等综合集成的噪声控制技术,设计开发了大型机力通风冷却塔降噪消声装置,取得了理想效果,使厂界噪声达到I类标准,为低噪声机力通风冷却塔的声学设计提供了工程实践参考。     

“烟塔合一”脱硫技术应用中应注意的问题

以山阴电厂2×300MW机组烟气排放系统采用的烟囱、间冷塔、吸收塔"三塔合一"项目为例,分析了湿法脱硫技术运用在烟塔合一项目中的特点及所需要注意的问题。     

垃圾焚烧尾气干法脱酸工艺雾化系统的研究

生活垃圾焚烧厂尾气净化干法处理系统的急冷塔的喷水量越大,脱酸效率越高。但是喷水量大容易引起急冷塔发生湿壁现象,从而造成塔体的腐蚀。因此在保证喷水量的同时,需要对急冷塔雾化系统进行详细研究,最大程度地减少急冷反应塔的湿壁与腐蚀现象发生。     

Thermodynamic coupling characteristics in hybrid (dry/wet) cooling system

A hybrid cooling system consisting of both a dry section and wet section is proposed in this paper as a means to conserving energy and water by combining the benefits of both dry and wet cooling modes. A new thermodynamic coupling characteristics computing model was established to identify the best combination of dry and wet cooling subsystems in the hybrid tower throughout year-round operation based on its air thermodynamic state under the “no plume” principle. A hybrid cooling tower in Inner Mongolia, China, consisting of an elliptical tube heat exchanger with rectangular fins and counter-flow wet packing, was designed as an example under the no plume principle. The minimum number of heat exchanger units in service and the corresponding thermodynamic operating parameters were obtained under a year-round operation. The tower exhibited notable advantages in regards to water conservation compared to the traditional evaporative cooling tower at an estimated yearly savings of 3.74 × 10⁷ kg water.     

POTENTIALS FOR REUSE OF WASTEWATER IN NORTH CENTRAL TEXAS1

ABSTRACT There are several possible ways in which wastewater from municipalities may be reclaimed and reused so as to minimize the need for imported water in North Central Texas. The rationale for reuse is enhanced by the fact that new water quality requirements in the Trinity River system will necessitate a very high degree of treatment at municipal sewage plants, just for discharge to surface streams. The largest potential market for municipal effluent is the steam-electric power industry. Within the next decade the generating capacity for electric power in North Central Texas will have to be more than doubled to meet increasing demand. Adequate supplies of condenser cooling water for such expansion will be difficult to obtain and assure. New large power stations might advantageously be located adjacent to municipal wastewater treatment plants, to utilize effluent as make-up water for cooling towers. Experience elsewhere has shown that well-treated wastewater can be used for cooling tower make-up with a minimum of trouble, with a considerable saving in overall cost, and with conservation of pristine water for other uses.     

天然气净化厂冷却塔风机驱动方式改造简论

文章介绍长庆油田第一天然气净化厂冷却塔风机驱动设备的改造情况。分析了长庆油田第一天然气净化厂冷却塔电机驱动方式存在的不足和原因,提出了改进对策和实施方案,论述了水轮机驱动方式改造工程在经济、节能降耗、环保、安全、高效等方面的优点,值得在油气田生产应用中推广。     

张家场天然气增压站噪声治理

为使增压站噪声降到国家允许标准,对其噪声进行了综合治理,设计了动力缸排气消声器和百叶窗式进风消声器等,经测试增压站内噪声由９３ｄＢ（Ａ）～１０１ｄＢ（Ａ）降为８１ｄＢ（Ａ）～８８ｄＢ（Ａ）。单台增压机运行时冷却风机噪声由９６ｄＢ（Ａ）降为８２．５ｄＢ（Ａ）。排气消声器噪声由９２ｄＢ（Ａ）降为８１ｄＢ（Ａ）。值班室噪声由５５ｄＢ（Ａ）降为５２．５ｄＢ（Ａ）,治理后达到了预期的效果。     

Performance of a small-scale solar-powered adsorption cooling system

In this study, an experimental investigation on the performance of a small-scale residential-size solar-driven adsorption (silica gel-water) cooling system that was constructed at Assiut University campus, Egypt is carried out. As Assiut area is considered as hot, arid climate, field tests for performance assessment of the system operation during the summer season are performed under different environmental operating conditions. The system consists of an evacuated tube with a reflective concentration parabolic surface solar-collector field with a total area of 36 m², a silica gel-water adsorption chiller of 8 kW nominal cooling capacity, and hot and cold water thermal storage tanks of 1.8 and 1.2 m³ in volume, respectively. The results of summer season field test show that under daily solar insolation varying from 21 to 27 MJ/m², the solar collectors employed in the system had high and almost constant thermal efficiency. The daily solar-collector efficiency during the period of system operation ranged from about 50% to 78%. The adsorption chiller performance shows that the chiller average daily coefficient of performance (COP) was 0.41 with the average cooling capacity of 4.4 kW when the cooling-water and chilled-water temperatures were about 31°C and 19°C, respectively. As the chiller cooling water is cooled by the cooling tower in the hot arid area, the cooling water is at a higher temperature than the design point of the chiller. Therefore, an experiment was carried out using the city water for cooling. The results show that an enhancement in the chiller COP by 40% and the chilling power by 17% has been achieved when the city water was 27.7°C.