RE: [EnergyPlus_Support] Is necessary sizing zone object when use only radiant panel as zone equipment

[YuanLu 元六 Li <yli006@xxxxxxxxxxx>]

When you are using a water system, please look up the



DistrictHeating, DistrictCooling

These are the equivalent objects to the Purchased Air for an air system.

For example, for heating:

DistrictHeating,Purchased Heating,
NODE_30,NODE_29,
1000000;
=====================
Field: Name
  This alpha field contains the identifying name for the district heating (i.e., purchased hot
water).
Field: Hot Water Inlet Node Name
  This alpha field contains the identifying name for the district heating inlet node.
Field: Hot Water Outlet Node Name
  This alpha field contains the identifying name for the district heating outlet node.
Field: Nominal Capacity
  This numeric field contains the nominal demand (W) that the district heating will meet
=================
You can get the followings as output for the above:

HVAC,Average,District Hot Water Rate [W]
HVAC,Sum,District Hot Water Energy[J]
Zone,Meter,DistrictHeating:Plant [J]
Zone,Meter,Heating:DistrictHeating [J]
HVAC,Average,District Heating Rate[W]
HVAC,Average,District Heating Inlet Temp[C]
HVAC,Average,District Heating Outlet Temp[C]
HVAC,Average,District Heating Mass Flow Rate[kg/s]

(from I/O Ref Manual)

If the number 1000000 is too small, the zone temperature setting will not be met.  The maximum zone demand is available after a DesignDay sizing run.

You can set the zone temperature to vary during the day, and watch the demand changes.  Set the timestep number higher to see more details on a DesignDay simulation.

 Dr. Li  



To: EnergyPlus_Support@xxxxxxxxxxxxxxx; dashamirmarini@xxxxxxxxx
From: ADjumaev-cc@xxxxxxxxxxxxxxxx
Date: Thu, 18 Jun 2009 13:00:40 -0400
Subject: Re: [EnergyPlus_Support] Is necessary sizing zone object when use only radiant panel as zone equipment