Page 22 - Air pollution and greenhouse gases from basic concepts to engineering applications for air emission control
P. 22

Nomenclature                                                   xxiii

            h     Height or length of a packed bed filled with granules (m)
            h     Sensible heat of air (kJ/kg of dry air)
                  Total enthalpy of the air exiting the room (J)
            h e
            h fg  Latent heat of vaporization of water (J/mol)
            h fg  Latent heat of vaporization of the liquid fuel (J/mol)
            h o   Heat of formation of substance i (J/mol)
             f ;i
                  Total enthalpy of the supply air (J)
            h s
            h(T)  Molar enthalpy of a component at temperature T (J/mol)
            H     Cyclone height of inlet (m)
            H     Distance between two plates of ESP (m)
            H     Hamaker constant (J)
            H     Henry’s law constant (Depends)
            H     Length/height of the column (m)
            H     Plume center height (m)
            H     Total enthalpy (J)
                  Critical height of a settling chamber (m)
            H c
                  Hamaker constant (J)
            H ij
            H B   Height of the building (m)
            HHV   Higher Heating Value (J/mol)
            HTU   Height of transfer unit (–)
            I     Electric current (A)
                  Number of molecule colliding with the wall per unit area per unit time (1/s
            j x
                    2
                  m )
                                                   2
            J     Flux of mass flow per unit area (kg/s m )
                                                    2
                  Collision per unit time per unit area (1/m )
            J x
            k     Boltzmann constant, 1.3807 × 10 −23  (J/K)
            k     Chemical reaction coefficient corresponding to y ss (mol/s)
            k     Karman constant = 0.4 (–)
                                                  2
            k     Permeability of the porous medium (m )
                                                2
            k     Permeability of a filter dust cake (m )
            k     Rate constant of the reaction (Depends)
            k     Thermal conductivity of the liquid droplet at the surface (W/(m K))
                                                          3
                  Reaction rate constant of CO 2 and the amine (m /mol s)
            k AmH
                  Rate constant for the backward/reverse reaction (Depends)
            k b
                  Rate constant for the forward reaction (Depends)
            k f
            k g 0  Amine liquid film mass transfer coefficient (m/s)
                  Mechanical constant of the particle (–)
            k P
                                                     2
                  Gas phase mass transfer coefficient (mol/m s)
            k y
                                                       2
                  Liquid phase mass transfer coefficient (mol/m s)
            k x
                  Mass transfer coefficient (depends)
            k 1
                  Mass transfer coefficient (depends)
            k 2
                  Mechanical constant of the particle filter materials (–)
            K f
            Kn    Knudsen number (–)
                  Concentration based chemical equilibrium constant (Depends)
            K C
   17   18   19   20   21   22   23   24   25   26   27