A Comparative Energetic Analysis of Active and Passive Emission Control Systems Adopting Standard Emission Test Cycles

Table 1

Operative conditions for the working fluid and emission control systems.

Reference converter size, 𝐻  𝑊  𝐿 (height; width; length)	141 mm	141 mm	300 mm
Cell density, 𝑐𝑑	62 cell/cm^2
Channel size, 𝑏	0.90 mm
Wall thickness, 𝑤	0.35 mm
Wetted surface per unit volume, 𝑆𝑤/𝑉	2201 m^−1
Solid phase density, 𝜌𝑠	2807 kg/m^3
Solid specific heat capacity, c	800 J/kg K
Exhaust flow rate, 𝑚̇	100 g/s
Exhaust gas temperature, 𝑇inlet	200 (700)°C
Initial solid temperature, 𝑇𝑠	700 (200)°C
Cycle time, 𝑡	20 s
Further exhaust flow rate, 𝑚̇	22 ÷ 252 g/s
Further exhaust gas temperature, 𝑇inlet	194 ÷ 616°C
Further initial solid temperature, 𝑇𝑠	194 ÷ 434°C
Further converter length, 𝐿	400 ÷ 600 mm
Further cycle time, 𝑡	30 ÷ 60 s