I can’t tell if the collector tank is using the stratified tank model. That tank often needs to be stratified to show energy savings from solar.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Thursday, August 28, 2014 7:40 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Tempering Valve in DHW loop with a solar tank [1 Attachment]
now with attachment :)
Hello everyone,
to illustrate my issue I attached a sketch of my HVAC loops.
In my case I want to benefit from solar collector in my DHW energy demand. But at the end ther is even a higher energy DHW demand due to the acting of the tempering valve. I implemented this valve to regulate the return flow of the DHW demand side and the outflow of the solar tank. Unfortunately there is a mass flow rate on the use side of the solar tank even though the temperature of the DHW demand side is higher than the solar tank temperature. So there is a cooling-down of my DHW return flow.
Now I tend to implent an EMS that overwrites the original behavior of the tempering valve. Any idea ?
I'd be grateful for any advice!
Thanks in advance.
Regards,
Christian R.
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Posted by: "Brent Griffith" <Brent.Griffith@xxxxxxxxxxxxxxxxxx>
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