§ 1065.642 PDP, SSV, and CFV molar flow rate calculations.

This section describes the equations for calculating molar flow rates from various flow meters. After you calibrate a flow meter according to § 1065.640, use the calculations described in this section to calculate flow during an emission test.

(a) PDP molar flow rate. (1) Based on the speed at which you operate the PDP for a test interval, select the corresponding slope, a_1, and intercept, a_0, as calculated in § 1065.640, to calculate PDP molar flow rate,, as follows:

(2) Calculate V_rev using the following equation:

Example:

a₁ = 0.8405 (m /s) f_nPDP = 12.58 r/s P_out = 99.950 kPa P_in = 98.575 kPa = 98575 Pa = 98575 kg/(m·s ) a₀ = 0.056 (m /r) R = 8.314472 J/(mol·K) = 8.314472 (m ·kg)/(s ·mol·K) T_in = 323.5 K

n = 29.428 mol/s