Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p68
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 68/71)
Character Range: 401448–404349

+ (3 601 × 0,08) + (3 639 × 0,05)
                  + (3 582 × 0,05) + (3 635 × 0,05)

                 = 3 604,6 kg/h

              MSAM = 0,226 + 0,122 + 0,151 + 0,152 + 0,076 + 0,076 + 0,076 + 0,136 + 0,151 + 0,121 + 0,076 +
                  0,076 + 0,075

                 = 1,515 kg

              Assume the particulate mass on the filters to be 2,5 mg, then

              Background correction (optional)

              Assume one background measurement with the following values. The calculation of the dilution factor DF is identical to Section 3.1 of this Annex and not shown here.

        Md = 0,1 mg; MDIL = 1,5 kg

Sum of DF = [(1-1/119,15) × 0,15] + [(1-1/8,89) × 0,08] + [(1-1/14,75) × 0,10] + [(1-1/10,10)
×  0,10]  +  [(1-1/18,02)  ×  0,05]  +  [(1-1/12,33)  ×  0,05)  +  [(1-1/32,18)  ×  0,05]
+ [(1-1/6,94) × 0,09] + [(1-1/25,19) × 0,10] + [(1-1/6,12) × 0,08] + [(1-1/20,87)
                       × 0,05] + [(1-1/8,77) × 0,05] + [(1-1/12,59) × 0,05]

 = 0,923

              Calculation of the specific emission (Annex III, Appendix 1, Section 5.5):

P(n) = (0,1 × 0,15) + (96,8 × 0,08) + (55,2 × 0,10) + (82,9 × 0,10) + (46,8 × 0,05) + (70,1 × 0,05)
+  (23,0  ×  0,05)  +  (114,3  ×  0,09)  +  (27,0  ×  0,10)  +  (122,0  ×  0,08)  +  (28,6  ×  0,05)  +
                 (87,4 × 0,05) + (57,9 × 0,05)

                = 60,006 kW

              Calculation of the specific weighting factor (Annex III, Appendix 1, Section 5.6):

              Assume the values calculated for mode 4 above, then

        WFE,i = (0,152 × 3 604,6/1,515 × 3 600,7) = 0,1004

              This value is within the required value of 0,10 ± 0,003.

2.                                 ELR TEST

              Since Bessel filtering is a completely new averaging procedure in European exhaust legislation, an explanation of the Bessel filter, an example of the design of a Bessel algorithm, and an example of the calculation of the final smoke value is given below. The constants of the Bessel algorithm only depend on the design of the opacimeter and the sampling rate of the data acquisition system. It is recommended that the opacimeter manufacturer provide the final Bessel filter constants for different sampling rates and that the customer use these constants for designing the Bessel algorithm and for calculating the smoke values.

2.1.                            General remarks on the Bessel filter

              Due to high frequency distortions, the raw opacity signal usually shows a highly scattered trace. To remove these high frequency distortions a Bessel filter is required for the ELR-test. The Bessel filter itself is a recursive, second-order low-pass filter which guarantees the fastest signal rise without overshoot.

              Assuming a real time raw exhaust plume in the exhaust tube, each opacimeter shows a delayed and differently measured opacity trace. The