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SDCS Regenerator Volumetric Air Flow Effect

Figure 6.11 presents the effect volumetric air flow has on regenerator performance. The volumetric air flow range studied is 102-256 m³ h^-1. Figure 6.11a shows

SDCS regenerator performance with inlet air volumetric flow as the inlet volumetric air flow increases, the moisture addition rate increases slightly fro

Fig. 6.11 SDCS regenerator performance with inlet air volumetric flow as the inlet volumetric air flow increases, the moisture addition rate increases slightly from 0.2299 g s^-1 at 102 m³ h^-1 to 0.3442 g s^-1 at 256 m³ h^-1. However, Fig. 6.11a shows that as the inlet air volumetric flow increases, the latent (regenerator) effectiveness decreases. This is because latent effectiveness is calculated with respect to the absolute humidity difference of the regenerator airstream. As the volumetric air flow is increased the absolute humidity difference (increase) of the regenerator airstream actually reduces, and thus the latent effectiveness is reduced. Figure 6.11b shows that as the air volumetric flow increases, the regenerator thermal input also increases from 980.6 to 1294 W. The temperature difference of the heating water flowing through the regenerator plate heat exchanger (PX2) ranges from 7 to 9 °C.

The regeneration process is used to re-concentrate the desiccant solution, and thus allow continuous operation of the dehumidifier. Therefore the regenerator outlet air condition is not of importance, however the moisture removed from the desiccant solution is. As a result, the regenerator should be operated at the highest volumetric air flow, to facilitate increased regeneration. However, during tri-generation system integration, this will need to be balanced with the available thermal input from the SOFC CHP system.

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SDCS Dehumidifier Volumetric Air Flow Effect
Figure 6.7 shows how changes in volumetric air flow effect dehumidifier performance. The volumetric air flow range investigated was 102-256 m3 h-1. Figure 6.7a shows that moisture removal rate increases as the volumetric air flow increases. Moisture removal rate increased from 0.1114 g s-1 at 102 m3...
(A Novel SOFC Tri-generation System for Building Applications)
IDCS Dehumidifier Volumetric Air Flow Effect
Figure 5.10 shows the impact inlet air volumetric flow has on dehumidifier performance at a set inlet condition of 30 °C and 60 % relative humidity. Figure 5.10a shows the moisture removal rate increases with volumetric air flow, from 0.2058 g s-1 at 124 m3 h-1 to a maximum of 0.2978 g s-1 at 243 m3...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Regenerator Inlet Air Condition Effect
Figure 6.10 presents the effect of inlet air relative humidity on regenerator performance. The relative humidity range studied was 50-80 % at a constant temperature of 30 °C. Figure 6.10a shows that as the inlet air relative humidity Fig. 6.10 SDCS regenerator performance with inlet air relative humidity...
(A Novel SOFC Tri-generation System for Building Applications)
Regenerator Inlet Air Temperature Effect
Figure 3.22 presents the effect varying the inlet air temperature from 20 to 35 °C has on the performance of the regenerator. Similar to the relative humidity effect, the vapour pressure of the inlet air increases with rising temperature. Figure 3.22a demonstrates that the outlet desiccant solution...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Dehumidifier Inlet Air Condition Effect
Figure 6.6 presents the effect of inlet air temperature and relative humidity on dehumidifier performance. The temperature and relative humidity range studied was 25-35 °C and 60-80 % relative humidity respectively. Figure 6.6a shows moisture removal rate increases as both the inlet air temperature...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Regenerator Desiccant Solution Volumetric Flow Effect
Figure 6.12 shows the effect of volumetric desiccant flow on regenerator performance. The volumetric desiccant flow range studied was 1.5-3.5 L min-1. Figure 6.12a shows that as the volumetric desiccant flow is increased, moisture addition rate and latent effectiveness increases from 0.08311 to 0.3442...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Regenerator Heat Exchanger Volumetric Flow Effect
Figure 6.14 shows the impact of regenerator heat exchanger water volumetric flow on regenerator performance. The volumetric flow range investigated was 0.5-3.5 L min-1. This range was selected because it covers a typical volumetric flow of a SOFC WHR circuit. Figure 6.14a shows that as the water volumetric...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Dehumidifier Desiccant Solution Volumetric Flow Effect
Figure 6.8 presents the effect of desiccant volumetric flow on dehumidifier performance. The volumetric desiccant flow range studied was 1.5- 3.5 L min-1. Figure 6.8a shows that as the desiccant volumetric flow was increased from 1.5 to 3.5 L min-1, the moisture removal rate increased from 0.2489 to...
(A Novel SOFC Tri-generation System for Building Applications)
SDCS Regenerator Water Flow Temperature Effect
Figure 6.13 shows the impact of regenerator water flow temperature on regenerator performance. The water flow temperature range investigated was 45-60 °C. This range was selected because it covers a typical temperature output of a SOFC WHR circuit. Figure 6.13a shows that as the inlet water temperature...
(A Novel SOFC Tri-generation System for Building Applications)