Post-Combustion and Heat Transfer in SRF

With this definition, a heat transfer efficiency of 100% implies that the temperature of the off-gas will be the same as the temperature of the bath. The HTE reported in the literature are in the 80-90% range (Ibaraki et al., 1990 Takahashi et al., 1992 Katayama et al., 1993b). Several authors (i.e., Gou et al., 1993, and Gudenau et al., 1993) have indicated that this definition has limitations because the heat losses to the furnace walls 

In order to provide further insight into the post-combustion ratio and the heat transfer efficiency, the factors that affect the PCR and HTE will be delineated. The factors that affect the PCR and HTE will be discussed separately with the understanding that a complex relationship may exist between the two parameters. The factors that affect the PCR are shown in Table 4, and Fig. 3 demonstrates the primary conditions for postcombustion. The PCR should be kept relatively high, since the fuel consumption decreases with an increase in the PCR at the same HTE (Aukrust, 1993). However, as mentioned, high PCR may lead to problems due to increases in  

Since a detailed discussion of the factors listed in Table 4 is beyond the scope of this review, the reader is referred to the listed references for further information. Several of the factors affecting the PCR also affect the slag layer and these are discussed in more detail in Sec. 2.4. 

The heat transfer efficiency is significantly affected by the slag layer properties and behavior therefore, those factors other than slag phenomena that affect HTE are presented in Table 5. As for the PCR, it is desirable to keep the HTE as high as possible. An increase in HTE at the same PCR decreases fuel consumption (Fruehan et al., 1989 Keogh et al., 

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