Energy efficiency relaxation factor

When excited and bath species are identical, resonant V-V exchange causes very rapid vibrational deactivation with very little rotational or translational energy involvement [61]. This can lead to a curious quasi-equilibrium of the vibrational modes in which translation and rotation remain cold [61]. Overall equilibration in these circumstances can then take many collisions. When excited and bath molecules have very different vibrational constants, the existence of near-resonant V-V pathways depends on such factors as the magnitude of anharmonicity and initial vibrational state and is highly partner specific. The mechanism can lead to rapid population of intermediate vibrational states in both excited and bath molecules from which there may only be very slow VRT pathways for relaxation, whereas in other instances, successive near-resonant paths can lead to a population cascade down to the lowest level. In the example shown above, N2 has fewer near-resonant V-V pathways than O2 on collision with OH (8 3) and so despite being the lesser partner in number density, O2 is overall a more efficient relaxer of OH than the more abundant N2. 

Components of Total Energy Efficiency Excitation, Relaxation, and Chemical Factors... 

The total energy efficiency of ary non-equilibrium plasma-chemical process can be subdivided into three main components an excitation factor (jjex), a relaxation factor (jjrei), and a chemical factor ( chem) ... 

The energy efficiency of the plasma-chemical processes is usually divided into three factors excitation factor relaxation factor ()]rei), and chemical factor ()]chem)- The most... 

The total energy efficiency of the considered mechanism of H2O dissociation includes three major factors the excitation factor ) ex, related to the discharge energy fraction going to vibrational excitation the relaxation factor showing the effectiveness of the dissociation... 

Total energy efficiency q) of the non-equihbrium plasma synthesis of NO from air or N2-O2 mixtures, stimulated by vibrational excitation, can be subdivided into three factors the excitation factor q x), the relaxation factor ( rei), and the chemical factor (/jchem, to be considered in the next section) ... 

Figure 1.3 Dielectric spectra for range of alcohols in the frequency range of 107-10n Hz. The absolute permittivities at low frequencies fall as the size of the alcohol increases and they began to respond to the microwave fields at lower frequencies because their relaxation times become longer. The loss factors that control the efficiency of conversion of microwave into thermal energies also reach their maxima at lower frequencies. The loss tangent is the ratio of the loss factor and permittivity at that frequency. (Idealised from the raw data illustrated in Ref. 10.)...

---