第三章 燃料系统在.docVIP

3 FUEL SYSTEM燃料系统 3.1 GENERAL DESCRIPTION总体描述 The gas fuel system, in conjunction with control system and the air system, automatically schedules fuel flow during engine acceleration and load operation. The system also provides overtemperature and overspeed topping control of fuel flow and automatic shutdown in the event of malfunction. 燃料系统与控制系统及空气系统连接。在发动机加速和负载操作期间，自动进行调节控制。系统也提供超温、超速及燃料流量控制。在故障时自动关断。 The gas fuel system includes the following: 气体燃料系统包括： Gas fuel metering and control气体燃料计量与控制 Pilot pressure for the operation of pilot-operated shutoff valves导向操作型关断阀操作的导向压力 3.1.1 Gas Fuel Requirements气体燃料要求 The selection of a satisfactory fuel depends upon the physical and chemical composition of the fuel. Natural gas fuel and service gas requirements for engine gas fuel, and service gas used for auxiliary gas-driven motors and gas-driven starter motors are given in Table 3.1.1. Gas supply must conform to Solar Specification ES 9-98. 满足要求的燃料取决于燃料的物理及化学组分。天然气燃料、伺服气体、辅助气体驱动马达用气及气体驱动起动器马达用气要求如表3.1.1所示。 Table 3.1.1 Gas Fuel and Service Gas Requirements气体燃料与伺服气体要求 Nomenclature命名 Description描述 Gas Temperature气体温度 -40°F to 160°F (-40°C to 71°C) Lower Heating Value of Fuel燃料低热值 1098 to 1342 WI (WOBBE index) (43.2 to 52.8 MJ/m3). WOBBE index is equal to the Lower Heating Value in Btu/Scf divided by the square root of the specific gravity of the fuel. A WOBBE index value outside this range is acceptable with the approval of Solar Engineering. 1098到1342沃贝指数（43.2～52.8 MJ/m2）沃贝指数等于燃气重力的平方根除以低热值 索拉透平可接受超出这一范围的沃贝指数 Composition成分 Fuel and Service gas composition shall be such that dew point at maximum engine supply pressure must be at least 10°F (5.6°C) below gas fuel supply temperature. The dew point of a gas can be calculated from the composition or determined experimentally with an instrument. 燃气及伺服气成份应该为：发动机最大供气压力时，气体露点至少为10F（5.6C）低于气体燃料温度。气体露点可以从成份中计算出来，或是用仪器试验性测得。 Contaminants: 杂质： Gas Fuel气体燃料 Total contaminants shall not exceed: 总杂质不应超过： 30 ppm x (lower heating valu