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Hello All,</div>
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<u><b><span style="font-size: 14pt; line-height: normal;">Project Details </span>
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I have an issue for conversion of EF to COP of service hot water heater.</div>
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Their is a service hot water heater installed in my project of 2000 L or 528 US gallons capacity. Heater is equipped with a re circulation pump of 4kW.</div>
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<u><b><span style="font-size: 14pt; line-height: normal;">Modeling Issue </span></b></u><br>
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As per ASHRAE 90.1 base case the minimum efficiency to be considered in base case as per table 7.8. Minimum efficiency formula as per table is 0.93-.00132 –V EF.
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With the above formula considering V as 528 US gallons Energy Factor (EF) will be 0.233. In many articles it was marked COP is 1/EF, by this statement COP will be 4.299.
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This is giving me the negative savings.</div>
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Can any one help me with correct process for conversion of EF to COP. <br>
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Secondly, what should be pump power in base case?</div>
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<b>Thanks in Advance </b><br>
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<div style="font-size:13.3333339691162px"><span style="font-size:10pt">Warm Regards </span></div>
<div style="font-size:12.8000001907349px"><font color="#000000"><span style="font-size:13.3333330154419px">Harshal Gupta</span></font></div>
<font color="#073763"><b>Energy Analyst</b></font></div>
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