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Cooling Tower Heat Transfer Performance Curve Changes

asked 2016-10-31 14:29:28 -0500

lyw0211 gravatar image

updated 2017-05-03 20:42:30 -0500

Recently, I used EnergyPlus to model a general building with a variable speed cooling tower. And I select CoolingTowerPerformance:CoolTools as the model type in the baseline model. Actually, we would like to replace that cooling tower with a new one which has a better heat transfer performance in reality as an ECM. So I need to model the ECM model by using another performance curve to increase the heat transfer. I read the definition of that curve in the document, which is using several parameters to determine the approach temperature. That means all the coefficient values are related to a lot of variables. So I have no idea what should I do to only increase the heat transfer performance. Does anyone did the similar changes before. That'll be super helpful! Thanks!

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answered 2016-10-31 15:37:03 -0500

The variable speed tower curves model a sort of scaleable shape of the thermal performance and not the effectiveness of the tower. Generally, you only want your own curve if you're modeling a piece of technology that's not a traditional cross or counterflow cooling tower. To alter the heat transfer capabilities of the tower, you need to change the design approach temperature. For example, a tower with a design approach of 5F will provide more heat transfer than a tower with a design approach of 7F.

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Thank you for your answers! That is super helpful for me!@aaron

lyw0211 gravatar imagelyw0211 ( 2016-11-07 15:25:52 -0500 )edit

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Asked: 2016-10-31 14:29:28 -0500

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Last updated: Oct 31 '16