Re: [EnergyPlus_Support] Painting External Walls

I think, as Jean has already mentioned, it is more important that you focus on the surface property of particular paints (visible absorbance, emittance, solar absorbance etc.) which may be obtained from manufacturers than on a colour based classification. Often, because of additives or the grain structure, different colour paints may have the same surface properties. Or the same white paint may have very different absorbance.

Once you have these properties, then you may modify surface properties of the outermost material on your wall or roof.

Material,
Â stucco25mm,Â Â Â Â Â Â Â Â Â Â Â Â !- Name
Â Â Â MediumSmooth,Â Â Â Â Â Â Â Â Â Â Â !- Roughness
Â Â Â 0.025,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Thickness {m}
Â Â Â 0.14,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Conductivity {W/m-K}
Â Â Â 600,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Density {kg/m3}
Â Â Â 2300,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Specific Heat {J/kg-K}
Â Â Â 0.9,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Thermal Absorptance
Â Â Â 0.7,Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Solar Absorptance
Â Â Â 0.7;Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â !- Visible Absorptance

Regards,

Asit

On Wed, May 6, 2015 at 5:48 AM, Ivan Mezzacapa ivan_slip@xxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

Â

A comparison of energy consumption.

Some colours have different absortances but, i don't know how to input this in the model.

Thanks

Tecg. Ivan Mezzacapa
PÃ³s Graduado em Engenharia de ProduÃ§Ã£o

Projetos de Ar Condicionado - Consultoria em EficiÃªncia EnergÃ©tica - SimulaÃ§Ã£o EnergÃ©tica
LinkedIN:Â http://www.linkedin.com/in/ivanmezzacapa
Celular: (11) 99963-9326

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
Date: Tue, 5 May 2015 18:44:39 +0200
Subject: Re: [EnergyPlus_Support] Painting External Walls

Â

A comparison of what? Energy consumption? Daylighting levels?Â

Look to the radiation parameters of the outer layer material of your construction. Different paints have different properties for different radiation wavelengths including the visual band. Don't let colour fool you.Â

Mit freundlichen GrÃ¼Ã?en- Sent from my iPhoneÂ (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel. Â +49 30 6706662-23

On 05.05.2015, at 16:25, "Ivan Mezzacapa ivan_slip@xxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

Â

Hi!

How you indicate the paintings on the envelope, in the simulation?

I would like to make a comparison using dark and light inks, on external walls?

Thanks

Tecg. Ivan Mezzacapa
PÃ³s Graduado em Engenharia de ProduÃ§Ã£o

Projetos de Ar Condicionado - Consultoria em EficiÃªncia EnergÃ©tica - SimulaÃ§Ã£o EnergÃ©tica
LinkedIN:Â http://www.linkedin.com/in/ivanmezzacapa
Celular: (11) 99963-9326