International Appliance Manufacturing 2008 - (Page 33) Figure 4: Baseline 1 Figure 5: Baseline 2 PAX/AO system shows a power reduction of nearly 23% over the baseline. Table 2 summarizes sound levels measured in a semi-anechoic chamber with the motor/fans mounted in evaporator panels and hung from supports, running in free air at 115 volts. The PAX fan is quieter than the baseline even though it runs slightly faster. Noise from the evaporator is typically not critically important since the panel is mounted inside the freezer compartment. Two other baseline 100mm fans were tested with a PAX/A. O. Smith motor created for each. Test results at 115 volts are summarized in Table 3. In the case of “Baseline 3,” the manufacturer is using a stronger 1/2” stack motor to drive considerable airflow (62.7 CFM) out of the 100mm fan. The corresponding PAX/AO system was also developed with a 1/2” Figure 6: Baseline 3 Figure 7: Baseline 4 1 Tognazzini, Bruce, Apple Computer Inc. TOG On Interface, Addision-Wesley Publishing Company, Inc. July 1993, pg. 96. International Appliance Manufacturing 2008 33
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