[EnergyPlus_Support] Re: Solar Array with Boiler for DHW

["Elmer Morrissey" <elmofuddly@xxxxxxxxx>]

Hi Peter and all,> >I've been looking at that example?> >On page 821 of the input/output reference document it says?> >"In order to realize energy savings with a solar heating system, it is necessary to use the>>WATER HEATER:STRATIFIED object for thermal storage.">>> >To which water heater is this referring to?> >I'm trying to emulate a system that uses 6 solar collectors that provide heating for DHW (similar to the example you highlighted). The water is initially heated in a vessel @40oC. When the solar collector does not provide enough heat to heat the water, extra heating is provided from a separate boiler circuit which also provides for other disparate systems. This water is then fed into another water heater which heats the DHW to a final temp of 60oC. Does anyone have any ideas how I might set up a similar system in E+. > >I would like some advice on how good/bad/awful my proposed is...> >Approach (This is only possible if I can make the water heaters do nothing and impose a control whereby the full load is picked up by the water heater source. Is that possible?)> >Solar Collector -> (temp pickup +) Heat Exchanger #1 ->  Water Heater #1 @40oC> >                             |-> Heat Exchanger #1 Boiler -> splitter {                                 |-> Water Heater #2 @ 60oC> >I would set the Heat Exchanger #1's efficiency to values that make it similar to the efficiency of the water heater to boiler circuit setup. This should emulate a twin source for the water heater.> >Does anyone have any thoughts?> >Kind regards> >-Elmer

 

 


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Ellis, Peter" <peter_ellis@n...> wrote:
>
> 
> Hello Elmer,
> 
> The example file "SolarCollectorFlatPlateWater.idf" illustrates a solar hot water system with DHW load, solar collectors, and storage tank (WATER HEATER:MIXED). You can connect a boiler, or another auxiliary WATER HEATER:MIXED (perhaps configured as instantaneous water heater), in series with the storage tank.
> 
> P
> 
> 
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]On Behalf Of Elmer Morrissey
> Sent: Thursday, January 05, 2006 12:31 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Solar Array with Boiler for DHW
> 
> 
> Hello all,
> 
> I am attempting a simulation of the system that provides hot water for 
> a building. 
> 
> System:
> A solar array and a gas fired boiler combine to provide the DHW load. 
> The solar array provides as much as it can and the rest of the load is 
> picked up by the boiler. Can anyone suggest how I can emulate this 
> kind of system or provide a similar example circuit? Is there some 
> form of object in E+ which acts as a buffer vessel for HW and can be 
> heated using two disparate loops?
> 
> Kind regards
> 
> -Elmer
> 
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.idf and press the "search" button.
> 
> 
> 
> 
> _____ 
> 
> YAHOO! GROUPS LINKS 
> 
> 
> 
> * Visit your group " EnergyPlus_Support <http://groups.yahoo.com/group/EnergyPlus_Support> " on the web.
> 
> 
> * To unsubscribe from this group, send an email to:
> EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx <mailto:EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe> 
> 
> 
> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . 
> 
> 
> _____ 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>





[Non-text portions of this message have been removed]



The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/