Fast, Simple, and Low-Cost Hydrogen Measurement
General H2O electrolysis process
Measuring hydrogen concentration in a typical H2O electrolysis process has the following challenges:
(1) Conventional thermal conductivity meters and alloy thin film meters; Slow response, tens of seconds to 60 seconds
(2) The anode side need to multiple pretreatments for water separation and dehumidification.
In H2O electrolysis plants that produce hydrogen, cross-leakage to the anode and cathode sides due to membrane degradation is an issue for safety management, and the inability to achieve a fast response in general hydrogen concentration measurement is a major issue for safety monitoring.
Since the gas components of the H2O electrolysis process are hydrogen and oxygen, it is possible to estimate the gas concentration by gas density. The applicability of gas density meters in hydrogen concentration measurement is introduced in this document.
Fig. 3 Schematic diagram of hydrogen measurement
Advantages of Using a Gas Density Meter for Hydrogen Measurement
Not only the analyzer's fast response but also pre-processing can be simplified, achieving overall fast response
- Simplified Plant Design
simple pre-processing contributes to the simplification plant design - Fast Response
The gas density meter is faster than conventional ones
Product Details
GD80
Gas Density Meter Detector
GD802G
Gas Density Meter Converter
Principle
Two pairs of piezoelectric elements for drive and detection are attached on four points of a thin-wall cylindrical resonator. A platinum temperature sensor is mounted to the density sensor.
The sample gas from inlet passes over the outside of the thin-walled cylindrical resonator and is exhausted at the gas outlet.
Fig. 4 Detector structure
Gas Density Meter Specifications
| Sample Gas Conditions | -Sample Gas: All gases except for corrosive gases (Contact Yokogawa for details.) -Temperature: -10 to 60℃ (No condensation) -Flow Rate: 0.1 to 1 L/min -Pressure: 50 kPa to 600 kPa abs. |
|
|---|---|---|
| Principle | Multi-mode oscillation technology | |
| Performance Specification | -Range: Concentration: 0 to 100 vol% -Minimum Range: Equivalent to 0.100 kg/m³ density -90% Response Time: Approx. 5 s (Time required for the reading to reach 90% of its final value after the indicated value begins to change (at a gas flow rate of 0.6 L/min)). -Linearity: ± 1% -Repeatability: ±0.5% or concentration equivalent to ±0.001 kg/m³ density (Whichever is greater. ) -Zero / Span Drift: Equivalent to ±0.003 kg/m³ density/month (Provided that the detector, converter, and pressure transmitter are not affected by ambient temperature.) |
|
相关行业
-
氢能
清洁氢能时代已经到来
相关产品&解决方案
-
Gas Density Meter GD80, GD802G, GD802S
Fast-response gas density measurement for safe and stable operation. More than density, monitor gas concentration, molecular weight, specific gravity, hydrogen purity, and replacement concentration.
-
原位气体分析仪TDLS8000
横河电机的 TDLS™8000集多种功能于一体，打造出坚固耐用的设备。其平台设计专为原位测量而打造，无需进行气体采样和预处理。
-
探头式可调谐二极管激光气体分析仪TDLS8200
无需采样，单侧法兰安装，在保持高速测量/高速响应的同时，安装成本降低一半。可轻松对现有设备进行改造升级。
-
气体密度/氢纯度分析仪
气体密度分析仪和检测仪提供连续气体密度测量以及包括比重和浓度比等其他一些有意义的参数。
