海洋水下溶解气体监测系统海洋溶解气体是海洋生态系统中重要的能量来源,在海洋物质能量循环中占据着重要地位,溶解气体监测系统可以帮助研究人员测量海洋、江河、湖水中3000米深度的溶解气体和同位素。海洋是CH4和N2O重要的排放源,水体中溶解的CO2、CH4和N2O等气体传统方法很难实现线测量,WSD2000CO2/CH4水汽分离器,采用动态顶空平衡方法是基于以一定速度连续通过平衡器的海水喷淋不断循环的顶空气并与其达到平衡而测定CO2、CH4和N2O等气体含量的装置。该设备响应迅速,可实现走航模式快速、准确分离目标气体。采用动态顶空平衡原理,基于以一定速度连续通过平衡器的海水喷淋不断循环的顶空气并与其达到平衡而测定CO2、CH4和N2O等气体含量的装置。CO2数据是沿用国际海洋学调查过程中测定pCO2通常的做法-连续流动式水-气平衡法获得【1 Guide to Best Pratices for Ocean CO2 Measurements】。测量指标海洋中溶解的二氧化碳(CO2)、甲烷(CH4)、氧化亚氮(N2O)、氨气(NH3)等浓度,CO2中δ 13C、δ 14C、CH4中δ 13C、N2O中δ 15N及δ 18O值。
Within the framework of an investigation into valve operating strategies for homogeneous chargedirect injection spark ignition engines under part load conditions this paper discusses the in-cylinder flowfields developed by running an optical engine with an early inlet valve closing strategy with a lift of 3.9 mmthat produces 3bar IMEP at 3500 rpm under firing conditions. The experimental facilities are similar toprevious work but measurement technique has been optimized with the significant aspect of this work beingthat the flow fields were determined in three vertical planes and one horizontal plane to highlight the threedimensional and the highly cyclic nature of the flow. These characteristics have significant impact onthe application of the PIV technique and data processing to ensure a high degree of confidence inthe flow fields generated. The time varying nature of this three dimensional flow field is discussed andhow it impacts on the PIV measurement technique particularly as regards data acquisition and dataprocessing. The true extent of the complex three dimensional flow field is readily seen and that, even thoughthe combustion chamber geometry is symmetrical, the swirl flow field is not. The main features of thevertical flow structure are described over a crankangle period from 90oCA to 120oCA whichhighlight the dominant feature as being a wall jet flow which interacts with the piston crown togenerate a strong reverse tumble flow.
EyeCGas® 2.0 VOC,专为挥发性有机物(Volatile Organic Compounds)的泄漏设计。它可以快速识别400 多种碳氢化合物和挥发性有机化合物气体,包括甲烷。EyeCGas® 2.0 符合美国环保署的“Quad Oa”(OOOOa) 法规,并在全球范围内用于LDAR(leakage detection and repair) 泄漏检测与修复的合规检测。它通过了UL class I Div II 危险环境防爆认证, 在恶劣苛刻的条件下有出色的表现。根据我们的用户反馈,EyeCGas® 2.0 拥有广泛的独特功能,使其成为世界上最好的光学气体摄相机。
EyeCGas® 2.0 VOC,专为挥发性有机物(Volatile Organic Compounds)的泄漏设计。它可以快速识别400 多种碳氢化合物和挥发性有机化合物气体,包括甲烷。EyeCGas® 2.0 符合美国环保署的“Quad Oa”(OOOOa) 法规,并在全球范围内用于LDAR(leakage detection and repair) 泄漏检测与修复的合规检测。它通过了UL class I Div II 危险环境防爆认证, 在恶劣苛刻的条件下有出色的表现。根据我们的用户反馈,EyeCGas® 2.0 拥有广泛的独特功能,使其成为世界上最好的光学气体摄相机。