国标信息

2011年6月1日起,洁净室及相关受控环境国家标准系列等同采用国际标准ISO 14644、ISO 14698系列。GB/T 25915.1-2010等同采用ISO 14644-1:1999空气洁净度等级GB/T 25915.2-2010等同采用ISO 14644-2:2000证明持续符合GB/T 25915.1的检测和监测技术要求GB/T 25915.3-2010等同采用ISO 14644-3:2005检测方法GB/T 25915.4-2010等同采用ISO 14644-4:2001设计、建造和启动GB/T 25915.5-2010等同采用ISO 14644-5:2004运行     

应用空气消毒净化技术对室内空气消毒效果试验研究

应用抗菌防霉过滤器、正负电离器、O3TVOC催化器、复合过滤器等多元消毒净化技术设计融为一体,对室内空气消毒、净化进行试验,结果表明,开机作用30 min,对白色葡萄球菌的杀灭率均为100%,开机消毒作用120 min,对空气中自然菌的平均消亡率为98.24%.应用多元消毒净化技术的集成,对室内空气具有高效消毒、净化作...     

大型环境试验舱研制与应用

研制一种大型不锈钢环境试验舱,对舱的性能进行测试,结果发现：温湿度控制精密,气密性好,本底污染物浓度低,回收率高,自衰减率低,能真实模拟室内环境,完全满足检测和科研要求。使用该环境试验舱分别测试了空气净化器和散热器,发现该舱性能完全符合检测需要,测试结果符合实际运行情况。     

多功能空气净化器性能试验研究

研究一种新型综合式空气净化器对室内空气中颗粒物和甲醛的净化效果.实验结果表明,这种综合式空气净化器对室内可吸入性颗粒物、甲醛以及二甲苯的净化效果明显.该净化器投入使用能够高质量地净化室内污染物,大幅度改善室内空气品质.     

浅谈变频器散热技术的发展现状

随着变频器的越来越广泛的应用,变频器的散热技术的研究变得越来越重要。目前电力电子设备常用的散热技术有自然空气散热、强制风冷、水冷和热管等,本文阐述了这几种散热技术的工作原理及其特点。     

国际新闻

ABB公司驱动器帮助理光节能http：//www.engineeringtalk.comABB的变速驱动器（VSD）帮助办公室设备制造商理光位于特尔福德的生产厂每年节约10万英镑的能源成本。该工厂的空气处理机组（AHUs）以及水循环泵和压缩机,每年花费125万英镑。理光公司的安迪·史密斯热衷于减少能源消耗,并初步试验了...     

模糊控制理论在即热式热水器中的应用

针对传统的PID控制器依赖被控对象精确的数学模型,当应用在复杂的、非线性、大迟滞的即热式热水器时难以达到良好的动态响应的缺点,将模糊控制理论应用于即热式热水器的温度控制中,同时分析了即热式热水器控制系统硬件组成及工作原理,并且在MATLAB中应用Fuzzy Toolbox和Simulink对控制系统进行仿真.实验结果表...     

Robust airfoil optimization based on improved particle swarm optimization method

A robust airfoil optimization platform is constructed based on the modified particle swarm optimization method (i.e., the second-order oscillating particle swarm method), which consists of an efficient optimization algorithm, a precise aerodynamic analysis program, a high accuracy surrogate model, and a classical airfoil parametric method. There are two improvements for the modified particle swarm method compared with the standard particle swarm method. First, the particle velocity is represented by the combination of the particle position and the variation of position, which makes the particle swarm algorithm a second-order precision method with respect to the particle position. Second, for the sake of adding diversity to the swarm and enlarging the parameter searching domain to improve the global convergence performance of the algorithm, an oscillating term is introduced to the update formula of the particle velocity. At last, taking two airfoils as examples, the aerodynamic shapes are optimized on this optimization platform. It is shown from the optimization results that the aerodynamic characteristic of the airfoils is greatly improved in a broad design range.     

Aerodynamics of indirect thrust measurement by the impulse method

The aerodynamic aspects of indirect thrust measurement by the impulse method have been studied both experimentally and numerically. The underlying basic aerodynamic principle is outlined, the phenomena in subsonic, supersonic and arc-heated jets are explored, and factors affecting the accuracy of the method are studied and discussed. Results show that the impulse method is reliable for indirect thrust measurement if certain basic requirements are met, and a simple guideline for its proper application is given.     

基于空气倍增的吸附电解净化环保抽烟机设计

针对目前家用抽油烟机存在的抽吸效果差,内部污染严重,无排放气体处理装置等缺点,提出了一种基于空气倍增的冷凝固定、吸附回收、电解分离净化的环保抽油烟机设计方案。并通过建模与理论分析验证了其可行性。