Laboratory Evaluation of the OASys Indirect/Direct Evaporative
Laboratory Evaluation of the OASys Indirect/Direct Evaporative
Laboratory Evaluation of the OASys Indirect/Direct Evaporative
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Appendix – Figures<br />
Sensible Cooling Capacity (Tons)<br />
Sensible EER (Btu/Wh)<br />
4.0<br />
3.5<br />
3.0<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
Figure 22: Sensible Capacity versus Wet-Bulb Depression<br />
Low, 90°Fdb<br />
Low, 100°Fdb<br />
Low, 110°Fdb<br />
Medium, 90°Fdb<br />
Medium, 100°Fdb<br />
Medium, 110°Fdb<br />
High, 90°Fdb<br />
High, 100°Fdb<br />
High, 110°Fdb<br />
0.0<br />
10 15 20 25 30 35 40 45<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
Low, 90°Fdb<br />
Low, 100°Fdb<br />
Low, 110°Fdb<br />
Medium, 90°Fdb<br />
Medium, 100°Fdb<br />
Medium, 110°Fdb<br />
High, 90°Fdb<br />
High, 100°Fdb<br />
High, 110°Fdb<br />
491-06.12.doc A-6<br />
Intake Wet-Bulb Depression (°F)<br />
65°Fwb<br />
Figure 23: Sensible EER versus Wet-Bulb Depression<br />
OA Cap = 0.0888 × WBD<br />
75°Fwb<br />
OA Cap = 0.0713 × WBD<br />
Room<br />
Capacity<br />
(80°F Ref.)<br />
OA Cap = 0.0535 × WBD<br />
0<br />
10 15 20 25 30 35 40 45<br />
Intake Wet-Bulb Depression (°F)<br />
70°Fwb<br />
OA EER = 2.005 × WBD<br />
OA EER = 1.846 × WBD<br />
OA EER = 1.694 × WBD<br />
Room<br />
EER<br />
(80°F Ref.)
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