Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6566

f) engine parameters: 1) thrust: by direct measurement to an accuracy of ±1 per cent at take-off power and ±5 per cent at the minimum thrust used in the certification test, with linear variation between these points; 2) rotation speed(s): by direct measurement to an accuracy of at least ±0.5 per cent; 3) gas generator airflow: determined to an accuracy of ±2 per cent by reference to engine performance calibration. The parameters a), b), d) and f) shall be determined at each engine emissions test setting, while c) shall be determined at intervals of not less than 1 hour over a period encompassing that of the emissions tests. 11/11/93 2007/70/II. szám ANNEX 16 — VOLUME II 11/11/93 APPENDIX 4. SPECIFICATION FOR FUEL TO BE USED IN AIRCRAFT TURBINE ENGINE EMISSION TESTING Property Allowable range of values Density kg/m3 at 15°C 780 – 820 Distillation temperature, °C 10% boiling point 155 – 201 Final boiling point 235 – 285 Net heat of combustion, MJ/kg 42.86 – 43.50 Aromatics, volume % 15 – 23 Naphthalenes, volume % 1.0 – 3.5 Smoke point, mm 20 – 28 Hydrogen, mass % 13.4 – 14.3 Sulphur, mass % less than 0.3% Kinematic viscosity at –20°C, mm2/s 2.5 – 6.5 24/11/05 No. 5 2007/70/II. szám 11/11/93 ANNEX 16 — VOLUME II APPENDIX 5. INSTRUMENTATION AND MEASUREMENT TECHNIQUES FOR GASEOUS EMISSIONS FROM AFTERBURNING GAS TURBINE ENGINES 1. INTRODUCTION Note.— The procedures specified in this appendix are concerned with the acquisition of representative exhaust samples and their transmission to, and analysis by, the emissions measuring system. These procedures only apply when afterburning is employed. The methods proposed are representative of the best readily available and most established modern practice. The need to correct for ambient conditions is recognized and a method will be specified when one becomes available. Meanwhile any correction methods used when afterburning is employed should be approved by the certificating authority. Variations in the procedure contained in this appendix shall only be allowed after prior application to and approval by the certificating authority. 2. DEFINITIONS Where the following expressions are used without further explanation in this appendix, they have the meanings ascribed to them below: Accuracy. The closeness with which a measurement approaches the true value established independently. Calibration gas. A high accuracy reference gas to be used for alignment, adjustment and periodic checks of instruments. Concentration. The volume fraction of the component of interest in the gas mixture — expressed as volume percentage or as parts per million. Flame ionization detector. A hydrogen-air diffusion flame detector that produces a signal nominally proportional to the mass-flow rate of hydrocarbons entering the flame per unit of time — generally assumed responsive to the number of carbon atoms entering the flame. Interference. Instrument response due to presence of components other than the gas (or vapour) that is to be measured. Noise. Random variation in instrument output not associated with characteristics of the sample to which the instrument is responding, and distinguishable from its drift characteristics. Non-dispersive infra-red analyser. An instrument that by absorption of infra-red energy selectively measures specific components. Parts per million (ppm). The unit volume concentration of a gas per million unit volume of the gas mixture of which it is a part. Parts per million carbon (ppmC). The mole fraction of hydrocarbon multiplied by 106 measured on a methaneequivalence basis. Thus, 1 ppm of methane is indicated as 1 ppmC. To convert ppm concentration of any hydrocarbon to an equivalent ppmC value, multiply ppm concentration by the number of carbon atoms per molecule of the gas. For example, 1 ppm propane translates as 3 ppmC hydrocarbon; 1 ppm hexane as 6 ppmC hydrocarbon. Plume. Total external engine exhaust flow, including any ambient air with which the exhaust mixes. Reference gas. A mixture of gases of specified and known composition used as the basis for interpreting instrument response in terms of the concentration of the gas to which the instrument is responding. Repeatability. The closeness with which a measurement upon a given, invariant sample can be reproduced in short-term repetitions of the measurement with no intervening instrument adjustment. Resolution. The smallest change in a measurement which can be detected. Response. The change in instrument output signal that occurs with change in sample concentration. Also the output signal corresponding to a given sample concentration. Stability. The closeness with which repeated measurements upon a given invariant sample can be maintained over a given period of time. Zero drift. Time-related deviation of instrument output from zero set point when it is operating on gas free of the component to be measured. Zero gas. A gas to be used in establishing the zero, or no response, adjustment of an instrument. 2007/70/II. szám Appendix 5 Annex 16 — Environmental Protection 11/11/93 Figure 5-1. Exhaust gas sampling system, schematic EXHAUST NOZZLE Minimum of 4 nozzle diameters 18 - 25 nozzle diameters NOZZLE CENTRE LINE PROBE SAMPLE TRANSFER LINE NOZZLE EXIT PLANE SAMPLING PLANE 2007/70/II. szám Annex 16 — Environmental Protection Volume II 11/11/93 Figure 5-2. Sample transfer and analysis system, schematic SAMPLE TRANSFER LINE PUM P DUM P PUM P ZERO SPAN VENT VENT VENT HC ANALYSIS CO ANALYSIS CO 2 ANALYSIS ZERO ZERO SPAN SPAN NO ANALYSIS x VENT REPRESENTS (GROUP OF) VALVE(S) TO IMPLEMENT REQUIRED ROUTE SELECTION(S) LINE TEM PERATURE CONTROLLED AT 160° C LINE TEM PERATURE CONTROLLED AT 60° C FURTHER NOTES AND DETAIL IN TEXT 2007/70/II. szám Appendix 5 Annex 16 — Environmental Protection 11/11/93 3. DATA REQUIRED 3.1 Gaseous emissions Concentrations of the following emissions shall be determined:

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