[Equest-users] Low Cooling Loads, Big Cooling Electric Consumption

[Keith Swartz]

Federico,

Does the proposed building have more insulation and does the building have a fair amount of internal heat gains? Adding insulation to a building with even a moderate amount of internal loads can cause a net annual energy penalty, even though summer and winter peak loads are reduced. The effect is more pronounced if the HVAC system does not have an economizer. Search the archives for a more complete explanation.

________________________________
Keith Swartz, P.E., LEED AP

Energy Engineer / Senior Project Manager
Energy Center of Wisconsin
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Phone: 608.238.8276 x123
Fax: 608.238.0523

The Buildings Team
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From: steinvor at msu.edu [mailto:steinvor at msu.edu]
Sent: Thursday, August 25, 2011 12:09 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Low Cooling Loads, Big Cooling Electric Consumption


 Hello All:

In a recent project, my model doesn't have a designed HVAC system, so I'm modeling my proposed the same as the baseline. Baseline system is #8 (chilled water) with FPF's, climate zone 1. Even though I'm getting lower cooling loads for the proposed building, the electric load corresponding to cooling the building is higher than the baseline. Fans and pumps consumption is increasing this value. What can be causing this, how can this value be reduced?

Thanks!

Federico
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