Functional improvement of a Gas Metering Valve
More stringent legislations regarding the emission of pollutants are a big challenge for engine manufacturers, suppliers and operators. As a result of those strict targets for CO2 reduction, the use of alternative fuels is moving forward. An interesting alternative to diesel engines is presented by gas-powered engines, where it is possible to reduce emission of pollutants significantly. Typical gaseous fuels for gas engines include natural gas, biogas, propane and butane, differing mainly in the calorific value, density and stoichiometric ratio. As a consequence of the different gas properties, depending upon which gas is used in a particular engine type, the gas flow rates can differ immensely for the same engine power output and, conversely, different dimensions of the gas train have to be designed and installed for the same engine type. In the power range of 0.5 MW up to 4MW, for highspeed engines (1500 rpm) typically a gas dosing unit is applied, which actuates a throttle valve to control the gas flow. The limited control of small gas flow-rate due to the nonlinear behavior of the throttle valve leads to different valve sizes for the different gas types on one engine type and to increasing costs of stock holding and production. Due to these facts, Heinzmann decided to begin the development of a new generation of gas flow control valves. An essential target of this development was a wider variety of the turn-down ratios compared to the existing systems in the market. Furthermore, special attention was paid to the production costs. Both requirements could have been met with the use of special geometries and the implementation of existing control devices. In this presentation the stages of development, design and bench testing are presented.
Jorg Hess
Heinzmann GmbH Co.KG,Germany
国际会议
上海
英文
1-7
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）