[esp-r] Regarding thermal and optical properties of construction materials

[Satya]

 Hi

1. Thermal properties:

 I have a list of building materials used for the building I am trying to
model. Unfortunately, none of these materials are listed in the ESP-r
library. Where can I find the relevant properties of those materials which
ESP-r needs to run a simulation? Here is the list of the materials.

_________________________________________

1 : 1.67 : 2.84 reinforced concrete (C:S:A)

1:4 cement mortar plaster

1:4 cement sand plaster

vitrified tiles

typical values for fiberglass reinforced plastic

typical values for ply

typical values for brickbat

_________________________________________



2. Optical properties

 The library doesn't include layers of paint. I intend to create a new
material by assigning the following properties:

conductivity: infinite // is this allowed

density: 0 // is this allowed

specific heat: same as that of underlying plaster



But how do I estimate IR emissivity and solar absorptivity? The internal
paint is a white and external is grey. Is there an easy way to measure it
or are there typical values for paints depending on the colour? Where do I
find this data?

 It also occurred to me that the paint layer, being very thin, could be
modelled as a transparent construction because my guess is that it does let
light pass through because of how thin it is. However, for this I will need
to find 8 optical properties of paint (3 types of transmittances, 4 types
of reflectences and colour rendering).

I understand that this is more accurate but if anybody tells me that an
opaque material type paint won't lead to major inaccuracies, I will gladly
work with an opaque paint.

 Where do I find the detailed optical data of 'white emulsion paint' and
'grey emulsion paint’?

 Thanks,

Satya
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