waterside economizer in eQuest

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Hello,

Can someone please explain the proper way to model a waterside economizer in
eQuest? I have found the option for a cooling tower with HX, but this does
not seem to yield any results.

Thank you,

Marcus Eliason

Marcus Eliason's picture
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Joined: 2011-09-30
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You can set up a separate chiller of type "water economizer". This will
attach to your CHW and CW Loops and will bypass the chiller and circulate
through your cooling tower when the outside air conditions are acceptable
for free cooling.

Steve Mignogna's picture
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Joined: 2011-09-30
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Further to this -- you will likely need to set up your equipment
controls to specify the water economizer chiller type leading in the
winter (below a certain OA) and the regular chillers leading above a
certain OA -- or based on a schedule.

bfountain's picture
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Joined: 2011-09-30
Reputation: 201

No, that's not required. If the WSE-"Chiller" is listed with the chillers on a loop, DOE-2 will use it when conditions allow. "Conditions" include CHW temperature, so reset up of CHW if possible maximizes the modeled use of the WSE.

Further to this -- you will likely need to set up your equipment
controls to specify the water economizer chiller type leading in the
winter (below a certain OA) and the regular chillers leading above a
certain OA -- or based on a schedule.

Fred Porter's picture
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Joined: 2011-09-30
Reputation: 0