**Author details**

**Nomenclature**

**Table 3.**

**344**

**Symbol Description Units**

*Design comparison between EMbaffle® and a conventional S&T for a CO2 regenerator.*

**CO2 Regenerator Conventional design EMbaffle® design** *Units TEMA type* BEM [8] BEM [8] *— Number of equipments* 1 1 *— Shell ID* 2040 1600 *mm Tube length* 23500 23500 *mm Baffle arrangement* NTIW EMbaffle® *— Installed area* 5279 4324 *m2 SS pressure drop* 1.5 1.5 *bar Duty* 48190 48190 *kW Duty / Installed area* 9,1 11,1 *kW/m2 Weight* 207,1 124,4 *tons*

*Heat Transfer - Design, Experimentation and Applications*

*A* Heat transfer area [m<sup>2</sup>

*AB* Baffle flow area [m<sup>2</sup>

*AEM* EMbaffle grid projected area [m<sup>2</sup>

*AR* Ring area [m<sup>2</sup>

*As* Shell flow area [m<sup>2</sup>

*C* Tube span constant [-]

arrangement and approaches temperatures

*f <sup>N</sup>* Natural frequency [Hz] *gc* Conversion constant [-] *h* Film transfer coefficient [W/m<sup>2</sup>

*hi* Inner heat transfer coefficient [W/m<sup>2</sup>

*ho* Outer heat transfer coefficient [W/m<sup>2</sup>

*I* Moment of inertia of tube [m<sup>4</sup>

*Kb* Hydraulic loss coefficient of baffle [-] *L* Unsupported tube span [m] *LWD* Long way of diamond [m] *NB* Number of baffles [-] *NC* Number of cleaning events [-] *NT* Number of tubes [-]

*Ft* Correction factor depending on exchanger

*Ccl* Cost of cleaning [US\$/unit] *CE* Cost of energy [US\$/J] *CL* Laminar heat transfer geometry function [-] *CT* Turbulent heat transfer geometry function [-] *Dh* Characteristic diameter for Nu and Reh [m] *Di* Tube internal diameter [m] *DP* Characteristic diameter for ReP [m] *DS* Shell inner diameter [m] *Do* Tube outer diameter [m] *E* Modulus of elasticity of tube material [Pa] *f <sup>F</sup>* Fanning friction factor [-]

]

]

]

]

]

[-]

K]

K]

K]

]

Marco Rottoli\*, Daniele Agazzi, Marcello Garavaglia and Fabio Grisoni EMbaffle® Technology @ Brembana&Rolle SpA, Valbrembo, Italy

\*Address all correspondence to: mrottoli@brembanarolle.com

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
