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Glossary

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A I B I C I D I E I F I G I H I I I J I K I L I M I N

O I P I Q I R I S I T I U I V I W I X I Y I Z

 

Saturation point

The maximum humidity ratio that can be held at specific temperature. The "saturation line" on the psychrometric chart depicts the saturation points for all listed dry-bulb temperatures.

 

Sensible heat

Refers to the amount of "dry" heat in the air related the the dry-bulb temperature. I-P units: Btu/lb (of dry air).

 

Solar reflectance

The ratio of the reflected component of incident solar energy to the total amount of incident solar energy over wavelengths of approximately 0.3 to 2.5 micrometers.

 

Specific heat

The quantity of heat needed to increase the temperature of one unit of mass one degree of temperature. I-P units: Btu/lbF

 

Specularity

Refers to the diffuse nature of a surface (the inverse of which is its surface roughness). A surface's specularity is typically described in terms of a value between zero and one (0-1), in which 0 represents absolute diffusion, such as a very rough surface, and 1 represents a completely flat specular mirror.

 

Sunspace (SS)

A sunspace is a passive solar heating strategy consisting of a southward-oriented glassed-in room (similar to a greenhouse or atrium) separated from the rest of the building by a common wall. Heat is transferred from the sunspace to the adjacent living space(s) either via conduction (through a thermal mass) or via convection (through vents and/or openings in the common wall). Present thermal mass serves to stabilize the interior temperature of both the sunspace and the building.

 

 

 

 

 

 

 

 

 

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