<div dir="ltr">Sang Hoon, <div><br></div><div><div>The point of the HVACTemplate files is to demonstrate how the nodes and branches are configured. </div><div>Using the DOAS and a zonal system template will show you how to configure a system with a ventilation system and separate zonal cooling / heating system. </div>
</div><div><br></div><div>I suggest using the HVACTemplates for DOAS and WaterToAirHeatPump to create the node connections. Upon running, this will create a file '.expidf' which is the HVACTemplates expanded out to full .idf.</div>
<div style>You can rename this file to be extension .idf and edit it like a normal .idf </div><div style><br></div><div style>Modify this renamed expanded HVACTemplate file, remove the zonal WaterToAirHeatPump objects and replace them with the VRF terminals following the example you are using.</div>
<div style><br></div><div style>Hope this helps,</div><div style><br></div><div style>Jason</div><div style><br></div><div style><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jun 3, 2013 at 12:08 PM, Lee, Sang Hoon <span dir="ltr"><<a href="mailto:hi.sanghoon@gmail.com" target="_blank">hi.sanghoon@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Bldg-Sim Group,<div><br></div><div>I am working on variable refrigerant flow (VRF) system modeling using EnergyPlus to understand energy savings compared to other conventional systems. </div>
<div><br></div><div>For VRF modeling, I utilized the example file "VariableRefrigerantFlow_5Zone.idf". This example uses outdoor air mixer in each VRF indoor unit for the supply air which goes through cooling and heating coil to the zone inlet node. </div>
<div><br></div><div>But, a typical VRF system practice uses a separate DOAS system to reduce cooling and heating load in the VRF side only recirculating return air to be conditioned. </div><div><br></div><div>I am trying to add DOAS in the VRF modeling. The problem is that HVACTemplate:DOAS (in EnergyPlus 7.2 or 8) does not support this. </div>
<div><br></div><div>Is there anybody who did VRF system modeling with adding DOAS?</div><div><br></div><div>Thank you!</div><div><br></div><div>--</div><div>Sang Hoon Lee, Post-doc</div><div>Building Technology</div><div>
College of Architecture</div><div>Georgia Institute of Technology</div><div><br></div>
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