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Home arrow Resources arrow ASHRAE Glossary
Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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thermal time lag

 

1. time interval by which the peak thermal response falls behind (lags) the peak thermal excitation in a thermal system.

2. phase difference in hours between the exterior and interior surface temperatures when the exterior surface is subjected to a sine-wave temperature change having a 24-hour period.

 

 

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