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RE: [EnergyPlus_Support] Water heater + condensing loop
Hi Miguel:
As you noted you cannot put a Water Heater:Mixed object in a condenser loop. In EnergyPlus the components in condenser loop are generally Environmental heat exchangers. However you can accomplish your objective by setting up two plant loops as follows:
Plant Loop 1: Consists of Water-water HP in the supply side similar to the way you would set up for a ground served system.
Plant Loop 2: In the demand side of the loop place the water-water HP and the supply side must contain the water heater mixed. Make sure the nodes are connected correctly. At this point note that the water heater mixed object has 2 sets of inlet/outlet nodes viz. source side inlet and use side inlet. In the above said configuration, the inlet nodes as seen from Plant Loop 2 to water heater must be the source side inlet. The use side nodes must be the inlet/outlet nodes of the domestic hot water system you will specify.
Little while ago we did some testing on the water heater mixed object to see how setting up two plant loops connected to each other work and from the testing we noticed that the water heater mixed object is smart to take care of such a situation. The above said method should work and we would like to hear what your experiences are.
Thanks
Sankar
S.K.Padhmanabhan
Research Associate
Mechanical & Aerospace Engineering
Oklahoma State University,
Stillwater, OK - 74075
Ph: (405)744-4380
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx on behalf of Miguel Angel Pascual Buisan
Sent: Mon 3/6/2006 11:37 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Water heater + condensing loop
Hello,
We are working with a water to water heatpump condensed by vertical ground
heat exchanger. We want to estimate how much heat could be recover for
Domestic Hot Water use, so we replaced the ground exchanger with a "Water
heater:mixed" in the condensing loop. It did not work because it is not
possible to have this type of equipment in a condensing loop. Any idea about
how can we fix it?
Thanks in advance.
Miguel Ángel Pascual
Director Técnico
MIYABI espacios urbanos bioclimáticos
Leyre 11bis, 1ºC 31002 Pamplona
Tel: 948 20 36 44 Fax: 948 20 78 60
Email: mapascual@xxxxxxxxx
Web: www.miyabi.es <http://www.miyabi.es/>
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