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Appendix<br />
°F<br />
Heat Pump Power (Watts)<br />
140<br />
130<br />
120<br />
110<br />
100<br />
132.7°F<br />
90<br />
80<br />
70<br />
60<br />
Figure 15: Energy Factor Test Start – Rheem HP50 Energy Saver Mode<br />
134.0°F<br />
133.9°F<br />
134.0°F<br />
134.2°F<br />
50<br />
0.0<br />
0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00<br />
1,300<br />
1,200<br />
1,100<br />
1,000<br />
900<br />
800<br />
700<br />
600<br />
491-09.17.doc A-8<br />
134.2°F<br />
Hours Since Start of First Draw<br />
Figure 16: HPWH Power Sensitivity to Tank Temperature<br />
Standard Error<br />
of <strong>the</strong> Estimate<br />
Rheem<br />
AirTap<br />
Six Tank Thermocouples (°F)<br />
Average Tank Temperature (°F)<br />
Water Inlet Temperature (°F)<br />
Water Outlet Temperature (°F)<br />
Water Flow Rate (GPM)<br />
Power (kW)<br />
December 3, 2009<br />
500<br />
100 105 110 115 120 125 130 135<br />
Average Tank Temperature (°F)<br />
4.5<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 />
GPM / kW
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