Chapter 6

Procedures for demonstrating compliance with NOx emission limits on board

• 1. General
     1. After installation of a pre-certificated engine on board a ship, every marine diesel engine shall have an onboard verification survey conducted as specified in 2.1.1.2 to 2.1.1.4 to verify that the engine continues to comply with the applicable NOx emission limit contained in regulation 13. Such verification of compliance shall be determined by using one of the following methods:
        1. Engine Parameter Check method in accordance with 6.2 to verify that an enginersquo;s component, settings and operating values have not deviated from the specifications in the enginersquo;s Technical File;
        2. Simplified Measurement method in accordance with 6.3; or
        3. Direct Measurement and Monitoring method in accordance with 6.4.

Engine Parameter Check method

• • 1. General
       1. Engines that meet the following conditions shall be eligible for an Engine Parameter Check method:
          1. engines that have received a pre-certificate (EIAPP Certificate) on the test bed and those that received a certificate (EIAPP Certificate) following an initial certification survey in accordance with 2.2.4; and
          2. engines that have undergone modifications or adjustments to the designated engine components and adjustable features since they were last surveyed.
       2. When a diesel engine is designed to run within the applicable NOx emission limit, it is most likely that within the marine life of the engine, the NOx emission limit may be adhered to. The applicable NOx emission limit may, however, be contravened by adjustments or modification to the engine. Therefore, an Engine Parameter Check method shall be used to verify whether the engine is still within the applicable NOx emission limit.
       3. Engine component checks, including checks of settings and an enginersquo;s operating values, are intended to provide an easy means of deducing the emissions performance of the engine for the purpose of verification that an engine with no, or minor, adjustments or modifications complies with the applicable NOx emission limit. Where the measurement of some operating values is required, the calibration of the equipment used for those measurements shall be in accordance with the requirements of appendix 4 of this Code.
       4. The purpose of such checks is to provide a ready means of determining that an engine is correctly adjusted in accordance with the manufacturerrsquo;s specification and remains in a condition of adjustment consistent with the initial certification by the Administration as being in compliance with regulation 13 as applicable.
       5. If an electronic engine management system is employed, this shall be evaluated against the original settings to ensure that appropriate parameters are operating within “as-built” limits.
       6. For the purpose of assessing compliance with regulation 13, it is not always necessary to measure the NOx emissions to know that an engine, not equipped with an after-treatment device, is likely to comply with the applicable NOx emission limit. It may be sufficient to know that the present state of the engine corresponds to the specified components, calibration or parameter adjustment state at the time of initial certification. If the results of an Engine Parameter Check method indicate the likelihood that the engine complies with the applicable NOx emission limit, the engine may be re-certified without direct NOx measurement.
       7. For an engine equipped with a NOx reducing device, it will be necessary to check the operation of the device as part of the Engine Parameter Check method.
    2. Documentation for an Engine Parameter Check method
       1. Every marine diesel engine shall have a Technical File as required in 2.3.4 which identifies the enginersquo;s components, settings or operating values which influence exhaust emissions and must be checked to ensure compliance.
       2. An enginersquo;s Technical File shall contain all applicable information, relevant to the NOx emission performance of the engine, on the designated engines components, adjustable features and parameters at the time of the enginersquo;s pre-certification or onboard certification, whichever occurred first.
       3. Dependent on the specific design of the particular engine, different onboard NOx influencing modifications and adjustments are possible and usual. These include the engine parameters as follows:
          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. turbocharger 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”,
          14. NOx abatement equipment “selective catalytic reduction”, or
          15. other parameter(s) specified by the Administration.
       4. The actual Technical File of an engine may, based on the recommendations of the applicant for engine certification and the approval of the Administration, include less

MEPC 58/23/Add.1

ANNEX 14

Page 45

components and/or parameters than discussed in section 6.2.2.3 depending on the particular engine and the specific design.

• • • 1. For some parameters, different survey possibilities exist. As approved by the Administration, the shipowner, supported by the applicant for engine certification, may choose what method is applicable. Any one of, or a combination of, the methods listed in the check list for the Engine Parameter Check method given in appendix 7 of this

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         Chapter 6 Procedures for demonstrating compliance with NOx emission limits on board 6.1 General After installation of a pre-certificated engine on board a ship, every marine diesel engine shall have an onboard verification survey conducted as specified in 2.1.1.2 to 2.1.1.4 to verify that the engine continues to comply with the applicable NOx emission limit contained in regulation 13. Such verification of compliance shall be determined by using one of the following methods: Engine Parameter Check method in accordance with 6.2 to verify that an enginersquo;s component, settings and operating values have not deviated from the specifications in the enginersquo;s Technical File; Simplified Measurement method in accordance with 6.3; or Direct Measurement and Monitoring method in accordance with 6.4. 6.2 Engine Parameter Check method 6.1.2 General Engines that meet the following conditions shall be eligible for an Engine Parameter Check method: engines that have received a pre-certificate (EIAPP Certificate) on the test bed and those that received a certificate (EIAPP Certificate) following an initial certification survey in accordance with 2.2.4; and engines that have undergone modifications or adjustments to the designated engine components and adjustable features since they were last surveyed. When a diesel engine is designed to run within the applicable NOx emission limit, it is most likely that within the marine life of the engine, the NOx emission limit may be adhered to. The applicable NOx emission limit may, however, be contravened by adjustments or modification to the engine. Therefore, an Engine Parameter Check method shall be used to verify whether the engine is still within the applicable NOx emission limit. Engine component checks, including checks of settings and an enginersquo;s operating values, are intended to provide an easy means of deducing the emissions performance of the engine for the purpose of verification that an engine with no, or minor, adjustments or modifications complies with the applicable NOx emission limit. Where the measurement of some operating values is required, the calibration of the equipment used for those measurements shall be in accordance with the requirements of appendix 4 of this Code. The purpose of such checks is to provide a ready means of determining that an engine is correctly adjusted in accordance with the manufacturerrsquo;s specification and remains in a condition of adjustment consistent with the initial certification by the Administration as being in compliance with regulation 13 as applicable. If an electronic engine management system is employed, this shall be evaluated against the original settings to ensure that appropriate parameters are operating within “as-built” limits. For the purpose of assessing compliance with regulation 13, it is not always necessary to measure the NOx emissions to know that an engine, not equipped with an after-treatment device, is likely to comply with the applicable NOx emission limit. It may be sufficient to know that the present state of the engine corresponds to the specified components, calibration or parameter adjustment state at the time of initial certification. If the results of an Engine Parameter Check method indicate the likelihood that the engine complies with the applicable NOx emission limit, the engine may be re-certified without direct NOx measurement. For an engine equipped with a NOx reducing device, it will be necessary to check the operation of the device as part of the Engine Parameter Check method. 6.22 Documentation for an Engine Parameter Check method Every marine diesel engine shall have a Technical File as required in 2.3.4 which identifies the enginersquo;s components, settings or operating values which influence exhaust emissions and must be checked to ensure compliance. An enginersquo;s Technical File shall contain all applicable information, relevant to the NOx emission performance of the engine, on the designated engines components, adjustable features and parameters at the time of the enginersquo;s pre-certification or onboard certification, whichever occurred first. Dependent on the specific design of the particular engine, different onboard NOx influencing modifications and adjustments are possible and usual. These include the engine parameters as follows: injection timing, injection nozzle, injection pump, fuel cam, injection pressure for common rail systems, combustion chamber, compression ratio, turbocharger type and build, charge air cooler, charge air pre-heater, valve timing, NOx abatement equipment “water injection”, NOx abatement equipment “emulsified fuel” (fuel water emulsion), NOx abatement equipment “exhaust gas recirculation”, NOx abatement equipment “selective catalytic reduction”, or other parameter(s) specified by the Administration. The actual Technical File of an engine may, based on the recommendations of the applicant for engine certification and the approval of the Administration, include less components and/or parameters than discussed in section 6.2.2.3 depending on the particular engine and the specific design. For some parameters, different survey possibilities exist. As approved by the Administration, the shipowner, supported by the applicant for engine certification, may choose what method is applicable. Any one of, or a combination of, the methods listed in the check list for the Engine Parameter Check metho 剩余内容已隐藏，支付完成后下载完整资料 资料编号：[138725]，资料为PDF文档或Word文档，PDF文档可免费转换为Word

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