ASME PTC 22:1997 pdf download PerformanceTest Code onGas Turbines
2.1 GENERAL DEFINITIONS
2.1.1 units: This Code uses U.S. Customary UnitsFor conversion to SI Units, see Appendix A
2.1.2 standard atmospheric conditions:14.696 psia(101.325 kPa),59F(28815),and relative humidity of 60%
2.1.3 rated power: the power output of the gasturbine engine or power plant when operating atspecified control and ambient conditions, in accord.ance with paras. 3.3.1 through 3.3.4
2.1.4 thermal efficiency: the ratio of the energyoutput to the energy supplied to the gas turbineexpressed as a percentage
2.1.5 heat input: the flow of fuel(s) muitiplied bythe high or low heat value of the fuel(s)
2.1.6 high heat value (HHV) at constant volume(liquid fuels): the heat produced by combustion ofa unit quantity of liquid fuel at constant volumeunder specified conditions, as in an oxygen bombCalorirneter. All water vapor from the combustionreaction is condensed to the liquid state.
2.1.7 high heat value (HHV) at constant pressure(gaseous fuels): the heat produced by the combustionof a unit quantity of gaseous fuei(s) at constantpressure under specified conditions. All water vaporformed by the combustion reaction is condensed tothe liquid statc.
2.1.8 low heat value (LHV) at constant pressure(liquid or gascous fucls): the heat produced bycombustion of a unit quantity of fuel at constantpressure under conditions such that all of the waterin the products remains in the vapor phase. !t iscalculated from the high heat value at constantvolume for liquid fuel(s), and from the high heatvaiue at constant pressure for gaseous fuel(s).
2.1.9 Gas Turbine Power Plant Nomenclature. Figure 21.9 shows the basic nomenciature used in thisCode. Depending on the scope of the test, some or all of the equipment shown may need to beconsidered for determining power plant performance. The station numbers refer to locations. Ambientair conditions are read at Station 1. Air conditionsentering the compressor are read at Station 2. Between Stations 1 and 2 are typically inlet-air filtrationand silencing devices, and, if applicable, air coolingor heating systems. Station 3 is the compressordischarpe. Intermediate stations, as with multiplespool compressors and intercooling may be identi-fied as Stations 2.1, 2.2, etc. Station 4 is the entranceto the heat source. Between Stations 3 and 4 maybe a recuperator or regenerator, or an aftercooler.Station 5 is the exit from the heat source, and Station6 is the entrance to the turbine section. Station 6is generally the plane at which the turbine inlettemperature is defined. for multiple section turbinesintermediate points would be defined as Stations6.1，6.2,ctc. !f a rehcater were used,6.1 wouldbe the high pressure turbine exit, 62 the reheaterinlet, 6.3 the reheater exit, and 6.4 the low pressureturbine in!et. Station 7 is at the turbine exit, andStation 8 represents the exhaust gas exit boundaryfor the test configuration. Between Stations 7 and8 may be exhaust silencing, emission reductiondevices， the recuperator or regenerator, or otherheat recovery devices. Station 9 is the load measuringpoint. in the case of eiectricai power generation,Station 10, the transformer connecting the generatorto the power grid, may be included. For cases wherenet piani power is io be delermnined, Siation 11needs to be considered. Included here may be fueltreatment systems,fue! suppiy pressurization, fuelatomization, lubricating oil pumps and conditioning.cooling water pumps and fans, compartment orbuilding ventilation fans, hydraulic oi! pumps, andcontrol power. If the load device has its own lubrication system, then the auxiliaries required must alsobe considered.in addition to the above nomenc!ature, the following letters designate the type of fluidin various parts of the cycle:
f= tuel
g= gas after the heat source