Re: [EnergyPlus_Support] Painting External Walls

["Rose Martin rose.arch2014@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Hi Dear Carlos, Thanks for your respond to this question. But where should we find a complete table download link including material colors and their corresponding Thermal Absorptance, Solar Absorptance and Visible Absorptance Please??
Thanks a lot
Rose

On Wed, May 6, 2015 at 3:06 PM, Carlos Krebs clmkrebs@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

Dear Ivan,

This I think that answer is easy ...

Those who want to know will it goes from 0 to 100 %, therefore you will fill with values between 0 and 1.

In the same "class list" that you enter the data of the materials, in the last three lines are the fields to fill the values in emitância and absortância.

The last line is the "thermal absorptance", usually with a value of 0.90 for paintings (regardless of color). The two previous ? "solar && visible absorptanceâ?? ? have a scale of values thaat accompanies the logic of lighter color, lower value, and dark color, greater value. For convenience, complete these two fields with the same values, ok?

Another important issue: the layers exposed to solar radiation is that they should have these fields filled; for the remaining value may remain blank.

The table B.2 of NBR15.220-part 3 presents some of these values for the main materials that we use, but you'll find other data in external sources of research institutes or even in international catalog of suppliers.

Best regards,

Carlos Krebs

LEED® Accredited Professional

Auditor Interno ISO 14.001

PROGRAU/FAUrb/UFPEL

(53) 8119-0003

On May 5, 2015, at 9:18 PM, Ivan Mezzacapa ivan_slip@xxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

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

Pós Graduado em Engenharia de Produção

Projetos de Ar Condicionado - Consultoria em Eficiência Energética - Simulação Energética

LinkedIN: http://www.linkedin.com/in/ivanmezzacapa

Celular: (11) 99963-9326

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

 

A comparison of what? Energy consumption? Daylighting levels? 

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. 

Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel.   +49 30 6706662-23

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

 

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

Pós Graduado em Engenharia de Produção

Projetos de Ar Condicionado - Consultoria em Eficiência Energética - Simulação Energética

LinkedIN: http://www.linkedin.com/in/ivanmezzacapa

Celular: (11) 99963-9326

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Posted by: Rose Martin <rose.arch2014@xxxxxxxxx>

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