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Re: [EnergyPlus_Support] water heater







From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx>
Sent: Saturday, February 18, 2012 4:47 PM
Subject: RE: [EnergyPlus_Support] water heater

 
For T.t:  If you are referring to the same project.  The answer is yes and no.
Dear Dr.Li
the building that i have modeled there is boiler that has tank ,how can i simulate it? i think the boiler onject in energyplus there is no tank ,
if it is right how i can simulate this?
 
HW loop is a class in the program.  water heater is an object in a class.
 
The radiators are branch objects connected to the HW loop and not to a water heater, but may be a water heater tank.   what you mean by  may be a water heater tank?
 
There are many water heater types, electric, gas, oil, etc.  It is a boiler in the HW Plant Loop.
 
Water heater tank is a storage tank,  (and need not have any volume, instantaneous tank.) 
 you mean when tank voulme is zero then it is tankless ( instantaneous tank) and if its tank volume is not zero then it is storage tank?
 
ALL OBJECTS IN CLASS: WATERHEATER:MIXED ===========
WaterHeater:Mixed,
    Indirect Water Heater,   !- Name
    AUTOSIZE,                !- Tank Volume {m3}
 
if i put zero in tank volume , then  water heater will be with out tank storage, yes? 
That is why I suggested that you need to learn the names from the EPlus manual and not from the Wiki link.

The DHW tank can be part of the same HW loop, to get the heat source from one boiler, but the water is not in the same HW loop, because the hot water loop for radiator does not want to be connected to the water main water.
 
HW is a closed loop.  The water is circulated to the coils, radiators, and heating coils.
 
In DHW (domestic HW) the inlet to the tank is the water main cold water the outlet is to the tap and used and then to the drain (sewer).  The EPlus objects are different for the shows, etc.

 Dr. Li  

 
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: t.t111ir@xxxxxxxxx
Date: Sat, 18 Feb 2012 10:30:00 +0000
Subject: [EnergyPlus_Support] water heater

 
can i use water heater to inculde hot water for radiator ?






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The primary EnergyPlus web site is found at:
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The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

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