Partial Flow Dilution System Sample Clauses

Partial Flow Dilution System. The final reported test results of the particulate emission shall be derived through the following steps. Since various types of dilution rate control may be used, different calculation methods for GEDF or VEDF apply. All calculations shall be based upon the average values of the individual modes during the sampling period. 1.4.2.1. Isokinetic Systems 1.4.2.2. Systems with Measurement of CO2 or NOx Concentration GEDFW,i = GEXHW,i × qi or: VEDFW,i = VEXHW,i × qi ConcE = wet concentration of the tracer gas in raw exhaust ConcD = wet concentration of the tracer gas in the diluted exhaust ConcA = wet concentration of the tracer gas in the dilution air Concentrations measured on a dry basis shall be converted to a wet basis according to paragraph 1.3.2. of this appendix. 1.4.2.3. Systems with CO2 Measurement and Carbon Balance Method CO2D = CO2 concentration of the diluted exhaust CO2A = CO2 concentration of the dilution air (concentrations in volume % on wet basis) This equation is based upon the carbon balance assumption (carbon atoms supplied to the engine are emitted as CO2) and derived through the following steps: GEDFW,i = GEXHW,i × qi and: 1.4.2.4. Systems with Flow Measurement

Partial Flow Dilution System. The final reported test results of the particulate emission must be determined through the following steps. Since various types of dilution rate control may be used, different calculation methods for GEDFW apply. All calculations must be based upon the average values of the individual modes during the sampling period. 5.2.1. Isokinetic systems GEDFW,i = GEXHW,i * q I G + (G ∗ r) ( ) qi = DILW,i EXHW,i EXHW,i ∗ r where r corresponds to the ratio of the cross sectional areas of the isokinetic probe and the exhaust pipe: