[esp-r] Re: solar collector "segment"

[Hall Monika]

Dear Kamel,

Thank you for your answer. I wittingly took the complex solar collector, because of the input possibilities. We have done some measurements and I want to compare them with a simulation. I would like to model the collector as real as possible.

Sometimes is the description in ESP-r a "little" short. Therefore I would like to have a description about the meaning of "collector mass (kg)" and "collector mass weighted thermal capacity W/(kg K)". The unit of a thermal capacity is J/(kg K), but in ESP-r-input-menu is stated W/(kg K). So, I'm not sure which input values are expected.

My long-term objective is to integrate the collector in a construction. How could I integrate the backside of the collector in a zone surface? In my project I have none outside conditions on the back side of the collector.


 
Best regards
 
Dr.-Ing. Monika Hall
Engineering
 
IIIII      GARTNER
Josef Gartner Switzerland AG
Schorenweg 10
CH-4144 Arlesheim
Phone   +41 61 417 11 86
Fax       +41 61 417 11 91
Mail      monika.hall at josef-gartner.ch
Web     www.josef-gartner.de
-----Original Message-----
From: Haddad, Kamel [mailto:KHaddad at NRCan.gc.ca] 
Sent: Tuesday, December 11, 2007 4:21 PM
To: Hall Monika; esp-r
Subject: RE: solar collector "segment"

Dear Monica,

The component you're using for solar collector requires a detailed description of the construction of the collector. 

There is another collector model with fewer user inputs required. The default parameter values in the plant database for this component are based on actual rating data for a collector available here in the Canadian market. Here is the plant database entry for this component:

  ---------------------------------------------------------------------
  PLANT COMPONENT                                           No :     84

 Component Description
    Generic type     : Solar collector
    Description      : Simplified flat plate solar collector, 1 node model
    Insertion date   : 6 Jan 2006
    Type: Single component                    Component code :   1180

 Nodal Scheme Description
    Number of nodes  :   1      No of nonzero matrix elements :      1
    Matrix positions :   1,
    Node connections :   1,
    Variable type    :  20,

Kamel Haddad


---------------------------------------------------------------------------------------------------------
Kamel Haddad, Ph.D.
Building Energy Simulation Researcher
CANMET Energy Technology Centre
Agent de Recherche en Simulation  d'Énergie des Batiments 
Centre de Technologie d'Énergie de CANMET 
580 Booth St.Ottawa, Ontario K1A 0E4
T: (613)-947-9822
F: (613)-996-9909
khaddad at nrcan.gc.ca <mailto:khaddad at nrcan.gc.ca>
---------------------------------------------------------------------------------------------------------



-----Original Message-----
From: Hall Monika [mailto:Monika.Hall at josef-gartner.ch] 
Sent: December 11, 2007 6:14 AM
To: esp-r
Subject: solar collector "segment"

Hi ESP-r user,

 

I try to start a solar collector. I choose the flat plate solar collector "segment". To fill in the right values I have some questions:

 

Collector mass (kg): Mass of tubes and sheet material? Allover mass, incl. absorber, glazing and side-construction?

 

Collector mass weighted thermal capacity (W/kg K): Is the unit correct? After reading in the source code, I assume, that the unit shall be Wh/(kgK) or Ws/(kg K).

 

Collector transparent surface area (m2): ?

Collector opaque surface area (m2): ?

 

 

g) flat plate solar collector "segment"

 

 

 

Does someone have experience with a solar collector?

 

Thank you.

 

Best regards

 

Monika Hall