There are many types of flat plate solar collector data listed in SolarCollectors.idf in the data set folder.
All you need for the other types of solar collectors is to use a different set of performance curve, from the manufacturer.
The incident solar energy available does not change with solar collector types.
Theoretical Flat Plate Solar Collector Thermosiphon Collector with Integral Storage
These are covered by EPlus.
When I said that the "thermosyphone" is simulated in a different way, I am commenting on how it is simulated.
May be I have used the wrong phrase "different way". If you draw a flow chart for thermosyphone how would it look like? I should have said that the problem has to be resolved into elements and then simulated. The result system may look different, because the pump is not in the thermosyphone system.
Thermosyphone is based on pressure difference created by water density of different temperature.
In the simulation, the temperature difference is in the ON/OFF set point. The flow amount is controlled by a pump with a small head.
Many current user writing to me have problem of using a pump as a control element. It does not matter whether it is variable speed or constant speed, so long the flow path is controlled. The default pump head is 179 kpa. When I reduced this to 100 pa, many disagreed, and argued that the autosized value was much larger that that.
This is the reason why I suggested the use of a pump with lower head, as an experiment.
Sure, the TRNSYS free version should be compared. I know many user on this forum have used TRNSYS. Many had commented that it was easier to use.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeremiah@xxxxxxxxxxxxxxxxxxxxxx
Date: Thu, 5 Apr 2012 11:21:11 -0700
Subject: Re: [EnergyPlus_Support] Re: Project of solar collector
__._,_.___
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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All you need for the other types of solar collectors is to use a different set of performance curve, from the manufacturer.
The incident solar energy available does not change with solar collector types.
These are covered by EPlus.
When I said that the "thermosyphone" is simulated in a different way, I am commenting on how it is simulated.
May be I have used the wrong phrase "different way". If you draw a flow chart for thermosyphone how would it look like? I should have said that the problem has to be resolved into elements and then simulated. The result system may look different, because the pump is not in the thermosyphone system.
Thermosyphone is based on pressure difference created by water density of different temperature.
In the simulation, the temperature difference is in the ON/OFF set point. The flow amount is controlled by a pump with a small head.
Many current user writing to me have problem of using a pump as a control element. It does not matter whether it is variable speed or constant speed, so long the flow path is controlled. The default pump head is 179 kpa. When I reduced this to 100 pa, many disagreed, and argued that the autosized value was much larger that that.
This is the reason why I suggested the use of a pump with lower head, as an experiment.
Sure, the TRNSYS free version should be compared. I know many user on this forum have used TRNSYS. Many had commented that it was easier to use.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeremiah@xxxxxxxxxxxxxxxxxxxxxx
Date: Thu, 5 Apr 2012 11:21:11 -0700
Subject: Re: [EnergyPlus_Support] Re: Project of solar collector
You may wish to explore TRNSYS, as it is the next step up in customization--as "workarounds" are possible but not necessarily preferred, and when a workaround is used the best case is to verify it with another tool...
I do not understand why this is not currently an object in E+, and expect that as time progresses it may be.. The nature of E+ is to evolve to provide objects so that work arounds are less commonly required. Funny how common workarounds are used in eQuest, for concepts Energy Plus can perform off the shelf, and also funny when workarounds are used in E+ for items that have tested "type"'s in TRNSYS
You may wish to use TRNSYS free version---
Solar Thermal Collectors (Type 73 FPC or Type 538 ETC TRNSYS )
- Compound Parabollic Concentrating Solar Collector
- Evacuated Tube Solar Collector
- Performance Map Solar Collector
- Quadratic efficiency Collector
- Theoretical Flat Plate Solar Collector
- Thermosiphon Collector with Integral Storage
Jeremiah D. Crossett
CleanTech Analytics
503-688-8951
This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics
On Thu, Apr 5, 2012 at 8:19 AM, Mário <mneves32@xxxxxxxxx> wrote:
Hello (Boa Tarde)
Please see the Note pag. 1111 of the InputOutput Reference from E+ V. 7.0.
Thanks
MN
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Francisco Bessa <fcbessa@...> wrote:
>
> Dear Mario,
> Â
> Because the model used in Brazil for social housing is a electrical resistence (as auxiliary equipment) into a boiler and without pump. I think that I consider pump and auxiliary equipment out of boiler it maybe doesn't represent our reality. I want to compare simulation in Energy Plus with other software.
> Â
> Thanks,
> Â
> Vanessa
>
>
> ________________________________
> De: MÃ?¡rio <mneves32@...>> Â
> Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Enviadas: Quarta-feira, 4 de Abril de 2012 17:41
> Assunto: [EnergyPlus_Support] Re: Project of solar collector
>
>
> Hello
>
> I didn´t find any reference in the IO pdf.
>
> Why don´t you use an aproximation using a flat plate and a a water heater (using a electrical resistence) and issue a risidual amount of energy for the pump?
>
> MN
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "fcbessa" <fcbessa@> wrote:
> >
> > Hi,
> >
> > I'm trying to do a project of solar collector, but I need some information:
> > 1. Energy Plus simulates solar system with termosyphon?
> > 2. Energy Plus simulates auxiliary heating system of solar system with electrical resistence in boiler?
> >
> > Best regards,
> >
> > Vanessa Bessa
> >
>
__._,_.___
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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