.1 a record book of engine parameters for recording of all the changes made relative loan engine's components and settings;
.2 an engine parameter list of an engine's designated components and settings and/or the documentation of an engine's load-dependent operating valises submitted by an engine manufacturer arid approved by the Administration; and
.3 technical documentation of an engine component modification when such a modification is made to any of the engine's designated engine components.
6.2.3.4 Record book of engine parameters
Descriptions of any changes affecting the designated engine parameters, including adjustments, parts replacements and modifications to engine parts, shall be recorded chronologically in an engine's record book of engine parameters. These descriptions shall be supplemented with any other applicable data used for the assessment of the engine' s NOx levels.
6.2.3.5 List of NOx influencing parameters sometimes modified on board
6.2.3.5.1 Dependent on the specific design of the particular engine, different NOx influencing modifications and adjustments are possible and usual. These include, but are nor limited to, the engine parameters as hot lows:
.1 injection timing,
.2 injection nozzle,
.3 injection pump,
.4 fuel cam,
.5 injection pressure for common rail systems,
.6 combustion chamber,
.7 compression ratio,
.8 turbo-charger type and build,
.9 charge air cooler, charge air pre-heater,
.10 valve timing,
.11 NOx abatement equipment "water injection",
.12 NOx abatement equipment "emulsified fuel" (fuel water emulsion),
.13 NOx abatement equipment "exhaust gas recirculation", or
.14 NO, abatement equipment "selective catalytic reduction".
6.2.3.5.2 The actual Technical File of an engine may. based its the recommendations of the engine manufacturer and the approval of the Administration, include less components and/or parameters than discussed above depending on the status of the particular engine and the specific design.
6.2.3.6 Cheek list for the engine parameter check method
For some parameters, different survey possibilities exist. Approved by the Administration, the ship operator, supported by the engine manufacturer, may choose what method is applicable.
Any one of the methods listed in appendix 8 of this Code may be sufficient to show compliance.
MEPC 39/6/1
ANNEX
Page 33
6.2.3.7 Technical documentation of engine component modification
Technical documentation shall include details of modification and influence data on NOx emissions, and it shall be supplied at such a time when modifications are carried out. For data influencing NOx emissions, test bed data obtained from a later engine, which is within the applicable range of the engine group concept, may be accepted.
6.2.3.8 Initial condition of engine components, adjustable features and parameters
An engine's Technical File shall contain all applicable information, relevant to the NOx emission performance of the engine, on the designated engine's components, adjustable features and parameters as the time of the engine's pre-certification (EIAPP Certificate) or initial certification (IAPP Certificate), whichever occurred first.
6.3 SIMPLIFIED MEASUREMENT METHOD
6.3.1General
6.3.1.1 The following simplified test and measurement procedure specified in this section shall be applied only for on-board confirmation tests and periodical and intermediate surveys when required. Every first engine testing on a test bed shall be carried out in accordance with the procedure specified in chapter 5 using a DM-grade marine diesel fuel. Corrections for ambient air temperature and humidity is accordance with 5.1.2.3 are essential as ships are sailing in cold/hot and dry/humid climates, which may cause a difference in NOx emissions.
6.3.1.2 To gain meaningful results for on-board confirmation tests and on-board periodical and intermediate surveys, as an absolute minimum, the gaseous emission concentrations of NOx, together with O2 and/or CO2 and CO, shall be measured in accordance with the appropriate test cycle. The weighting factors (W F) and the number of modes(s) used in the calculation shall be in accordance with 3.2.
6.3.1.3 The engine torque and engine speed shall be measured but, so simplify the procedure, the permissible deviations of instruments (sec 6.3.7) for measurement of engine-related parameters for on board verification purposes indifferent than from those permissible deviations allowed under the test bed resting method. If it is difficult to measure the torque directly, the brake power may be estimated by any other means recommended by the engine manufacturer and approved by the Administration.
6.3.1.4 In practical cases. it is often impossible to measure the fuel consumption once an engine has been installed on board a ship. To simplify the procedure on board, the results of the measurement of the fuel consumption from an engine's pre-certification tent bed testing may be accepted. In such cases, especially concerning heavy fuel operation. an estimation with a corresponding estimated error shall be made. Since the oil fuel flow rate used in the calculation (G FUEL) must relate to the oil
fuel composition determined in respect of the fuel sample drawn during the test, the measurement of G FUEL from the teat bed testing shall be corrected for any difference in net calorific values between the teat bed and teat oil fuels. The consequences of such an error on the final emissions shall be calculated and reported with the results of the emission measurement.
6.3.1.5 Except as otherwise specified. all results of measurements, test data or calculations required by this chapter shall be recorded in the engine's teat report in accordance with 5.10.
