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Dehumidifier Inlet Air Relative Humidity Effect

Figure 3.15 presents the effect varying the inlet air relative humidity from 40 to 90 % has on the performance of the dehumidifier. Figure 3.15a, demonstrates that the increase in air absolute humidity difference and cooling output is proportional to the inlet air relative humidity. As the inlet air relative humidity increases, so does the partial vapour pressure of the air, leading to a greater vapour pressure differential between the air and desiccant solution. An increase in the vapour pressure differential leads to increased mass transfer and thus a greater change in the absolute humidity of supply air, creating a larger (latent) cooling effect. Figure 3.15b demonstrates that increasing the inlet air relative humidity from 40 to 90 % increases both the latent and enthalpy effectiveness from 28.14 and 35.56 to 45.74 and 47.72 % respectively. Figure 3.15b demonstrates that the desiccant solution outlet mass concentration is inversely proportional to inlet air relative humidity.

a, b Inlet air temperature effect on dehumidifier performance

Fig. 3.16 a, b Inlet air temperature effect on dehumidifier performance

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Regenerator Inlet Air Relative Humidity Effect
Figure 3.21 presents the effect varying the inlet air relative humidity from 20 to 80 % has on the performance of the regenerator. Figure 3.21a demonstrates that the outlet solution temperature and concentration are inversely proportional to inlet air relative humidity. Furthermore, Fig. 3.21b demonstrates...
(A Novel SOFC Tri-generation System for Building Applications)
Dehumidifier Inlet Air Temperature Effect
Figure 3.16 presents the effect varying the inlet air temperature from 25 to 40 °C has on the performance of the dehumidifier. Figure 3.16a demonstrates that increasing supply air temperature produces a greater air absolute humidity difference and cooling output. At a constant relative humidity, an...
(A Novel SOFC Tri-generation System for Building Applications)
Dehumidifier Inlet Air Velocity Effect
Figure 3.17 presents the effect varying the inlet air velocity has on the performance of the dehumidifier. The investigated range of inlet air velocity in each channel is 0.7-2.5 m s-1, this equates to a volumetric air flow range of 111— 397 m3 h-1 through the whole dehumidifier. Figure 3.17a demonstrates...
(A Novel SOFC Tri-generation System for Building Applications)
IDCS Dehumidifier Inlet Air Condition Effect
The IDCS dehumidifier performance has been evaluated over a 50-70 % relative humidity range at a 30 and 35 °C inlet air temperature. The data presented in Fig. 5.8 shows that dehumidifier performance improves with increasing inlet air temperature and relative humidity. Figure 5.8a shows that over the...
(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)
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)
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 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)
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)