Window Heat Gain/Loss values are listed in separate columns. The heat transfer is mainly by radiation.
Surface Int Convection Heat Rate has positive value when the surface is heating the zone. This value may not include the radiation heat gain component through a window which is distributed to the other interior surfaces and cclculated.
Solar beam radiation may enter one window and leave the zone via another window without heating the zone. Most of the diffused component stays in the zone and adds to the zne heating.
I have not verified these statements with the manuals and are based on what I have observed.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ooi_kb3@xxxxxxxxxxx
Date: Fri, 3 Jun 2011 14:31:25 +0000
Subject: [EnergyPlus_Support] Re: total gains.!
What variable do your -5 to 300W refer to? Before you sum Window Heat Gain/Loss, you should convert the Window Heat loss to negatives. Then verify that the sum of Window Heat Gain/Loss for all the windows in a zone is equal to the Zone Window Heat Gain/Loss.
For comparison, the units have to the same. The units of output variables for Energy and Gain/Loss rates are different. Happy comparing, ooi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Thodwris Xaritidis <maki_to_fai@...> wrote:
>
> Hello,
>
> I did that and I have a range of values from -5 to 300 W.
> Why is that I have negative numbers?? Is that correct?
> In this way can I compare windows heat gains andSurface Int Convection Heat Rate to check what I need to renovate?
>
> thanx
>
>
>
> ________________________________
> From: ooikoonbeng2004 <ooi_kb3@...>
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Thursday, 2 June 2011, 2:05
> Subject: [EnergyPlus_Support] Re: total gains.!
>
>
> Â
> Ask for the output variable: "Surface Int Convection Heat Rate" This is for every surface, opaque (normally walls and maybe, doors) and transparent (normally windows and sometimes glass doors).
>
> In addition to the above, transparent surfaces also transmit radiation. Ask for the output variable: "Window Heat Gain" and "Window Heat Loss". The sum of all the Heat Gain/Loss for all windows should is equal to the value given by the output variable "Zone Window Heat Gain/Loss"
>
> i use new columns in the spreadhseet for summing and get percentages.
>
> i have used the wild key * in the Key Value field of the Output variable object. For models with more zones, i have used the Zone name in the Key Value field. In this case, the values for the other zones are not shown.
>
> If you want different CSV for different time aggregates (hourly, daily, monthly etc) use the RVI as shown, by way of example, in the AdvancedOutput subfolder of the ExampleFiles folder
>
> all the best
> ooi
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Thodwris Xaritidis <maki_to_fai@> wrote:
> >
> > Hello,
> >
> > Is there any way of getting a passive breakdown from e+?
> > I mean that I have a passive building and I need to find
> >
> > where� the heat is coming from? the windows or the walls?
> > So I need to have something like total gains and the windows gains
> > and check them out.
> >
> > Thank you
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: Linda Lawrie <linda@>
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > Sent: Tuesday, 31 May 2011, 14:46
> > Subject: Re: [EnergyPlus_Support] Heat Exchanger Hydronic
> >
> >
> > Ã?Â
> > I think this is an incorrect error message and should say
> > that you are missing the schedule.
> >
> > Make sure you have included a schedule in the
> > Setpoint Schedule Name
> > field
> >
> > At 06:41 AM 5/31/2011, dgerome06 wrote:
> >
> > Hi everybody,
> > >I try connect a plant loop with a condenser loop thanks to Heat
> > Exchanger:Hydronic in Condenser Equipment. In the plant i have set a
> > ThermalStorage:ChilledWater:Mixed and in the condenser loop i have set a
> > fluidcooler.
> > >
> > >BUt i have the following message:
> > >
> > >** Severe� **
> > GetFreeCoolingHeatExchanger:HeatExchanger:Hydronic="EVAPORATEUR",
> > Controlled Component Name="CONDENSEUR" not found.
> > >
> > >CONDENSEUR is the name of the fluidcooler, it is existing, so i dont
> > understand how to solve this problem.
> > >
> > >Does someone could help me?
> > >
> > >Thanks
> > >
> > >
> > >
> > >------------------------------------
> > >
> > >Primary EnergyPlus support is found at:
> > >http://energyplus.helpserve.com or send a message to
> > energyplus-support@
> > >
> > >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 currently allowed but be mindful that not everyone has a
> > high speed connection.� Limit attachments to small files.
> > >
> > >EnergyPlus Documentation is searchable.� Open EPlusMainMenu.pdf
> > under the Documentation link and press the "search"
> > button.
> > >Yahoo! Groups Links
> > >
> > >
> > EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
> > >
> > >
> >
>
For comparison, the units have to the same. The units of output variables for Energy and Gain/Loss rates are different. Happy comparing, ooi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Thodwris Xaritidis <maki_to_fai@...> wrote:
>
> Hello,
>
> I did that and I have a range of values from -5 to 300 W.
> Why is that I have negative numbers?? Is that correct?
> In this way can I compare windows heat gains andSurface Int Convection Heat Rate to check what I need to renovate?
>
> thanx
>
>
>
> ________________________________
> From: ooikoonbeng2004 <ooi_kb3@...>
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Thursday, 2 June 2011, 2:05
> Subject: [EnergyPlus_Support] Re: total gains.!
>
>
> Â
> Ask for the output variable: "Surface Int Convection Heat Rate" This is for every surface, opaque (normally walls and maybe, doors) and transparent (normally windows and sometimes glass doors).
>
> In addition to the above, transparent surfaces also transmit radiation. Ask for the output variable: "Window Heat Gain" and "Window Heat Loss". The sum of all the Heat Gain/Loss for all windows should is equal to the value given by the output variable "Zone Window Heat Gain/Loss"
>
> i use new columns in the spreadhseet for summing and get percentages.
>
> i have used the wild key * in the Key Value field of the Output variable object. For models with more zones, i have used the Zone name in the Key Value field. In this case, the values for the other zones are not shown.
>
> If you want different CSV for different time aggregates (hourly, daily, monthly etc) use the RVI as shown, by way of example, in the AdvancedOutput subfolder of the ExampleFiles folder
>
> all the best
> ooi
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Thodwris Xaritidis <maki_to_fai@> wrote:
> >
> > Hello,
> >
> > Is there any way of getting a passive breakdown from e+?
> > I mean that I have a passive building and I need to find
> >
> > where� the heat is coming from? the windows or the walls?
> > So I need to have something like total gains and the windows gains
> > and check them out.
> >
> > Thank you
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: Linda Lawrie <linda@>
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > Sent: Tuesday, 31 May 2011, 14:46
> > Subject: Re: [EnergyPlus_Support] Heat Exchanger Hydronic
> >
> >
> > Ã?Â
> > I think this is an incorrect error message and should say
> > that you are missing the schedule.
> >
> > Make sure you have included a schedule in the
> > Setpoint Schedule Name
> > field
> >
> > At 06:41 AM 5/31/2011, dgerome06 wrote:
> >
> > Hi everybody,
> > >I try connect a plant loop with a condenser loop thanks to Heat
> > Exchanger:Hydronic in Condenser Equipment. In the plant i have set a
> > ThermalStorage:ChilledWater:Mixed and in the condenser loop i have set a
> > fluidcooler.
> > >
> > >BUt i have the following message:
> > >
> > >** Severe� **
> > GetFreeCoolingHeatExchanger:HeatExchanger:Hydronic="EVAPORATEUR",
> > Controlled Component Name="CONDENSEUR" not found.
> > >
> > >CONDENSEUR is the name of the fluidcooler, it is existing, so i dont
> > understand how to solve this problem.
> > >
> > >Does someone could help me?
> > >
> > >Thanks
> > >
> > >
> > >
> > >------------------------------------
> > >
> > >Primary EnergyPlus support is found at:
> > >http://energyplus.helpserve.com or send a message to
> > energyplus-support@
> > >
> > >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 currently allowed but be mindful that not everyone has a
> > high speed connection.� Limit attachments to small files.
> > >
> > >EnergyPlus Documentation is searchable.� Open EPlusMainMenu.pdf
> > under the Documentation link and press the "search"
> > button.
> > >Yahoo! Groups Links
> > >
> > >
> > EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
> > >
> > >
> >
>
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
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 currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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