Figure 3: Pressure loss as a function of airflow. dry air Figure 4: Effectiveness as a function of airflow. dry air 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.44 0.48 0 06 12 18 24 30 36 42 48 54 height (inches) flow [ft 3 m-1 ] 3.9 7.9 11.8 Figure 5: Influence on effectiveness due to condensation heat. return-air: +68°F / height: 11.81” / airflow: 196 ft3 100 99 98 97 96 95 94 93 92 91 90 100 80 return-air RH (%) 60 40 100 80 60 40 20 0 20 0 -4 514233241505968 outside temperature [°F] h-1 68 59 50 41 32 23 14 5 -4 60 100 80 82 84 86 88 90 92 94 96 98 06 12 18 24 30 36 42 48 54 3 flow [ft m-1 ] height (inches) 3.9 7.9 11.8 Figure 6: Exhaust air temperature as a function of the outside temperature. return-air: +68°F / height: 11.81” / airflow: 196 ft3 h-1 60 100 80 60 40 20 0 freezing risk return-air RH (%) 100 80 60 40 20 0 -45 14 23 32 41 50 59 68 outside temperature [°F] 5 effectiveness [%] Pressure drop [inches Water Column] exhaust air temperature [°F] effectiveness [%] Pagina 4
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