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heat withdrawn from water heater tank

asked 2015-11-11 20:11:21 -0500

s_pourm's avatar

updated 2015-11-12 04:42:34 -0500

as an output , I am looking at the HPWHPLANTTANK:Water Heater Use Side Heat Transfer Rate [W](Hourly) to find out the heat withdrawn from my water heater tank.

I can't understand the huge spikes in some points.

Water Heater Use Side Heat Transfer Rate

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answered 2015-11-12 11:49:13 -0500

Archmage's avatar

I would guess that during those times the inlet water is either unusually cold or there is a spike in flow rate. To investigate, plot the output variables Water Heater Use Side Inlet Temperature and Water Heater Use Side Mass Flow Rate. Then look to what is happening on the demand side of the loop to explain. For example if you have both hot water coils and water use, then this sort of thing could happen when the coils shut down and there is no longer warm water mixing with the cold mains water.

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Asked: 2015-11-11 20:11:21 -0500

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Last updated: Nov 12 '15