Condensation in duct

[harsen]

Hai,
When return duct from the space getting in to the ambient zone(say 19°C) without the Insulation condensation get happen;; at the same case when the return air get entered into the mixing box in the Airhandling unit along with the fresh air in the ambient temperature say 52°C condensation not happen ;;

Can anybody plz explain the concept of the above

Harsen

[nike123]

Easy, plot your conditions at Mollier diagram.

[Peter_1]

You're simply reaching the dewpoint of the surrounding air.

[harsen]

Mr.Peter,
Plz explain the above concept some more deeply

harsen

[Peter_1]

There are complete books written only about your single question.

http://www.buildingpreservation.com/Condensation.htm
http://www.lamtec.com/dew-point-calculator.htm
http://en.wikipedia.org/wiki/Dew_point

[harsen]

Sir ,
When i refer the link i saw the word the moisture laden air ; word LADEN what it mean

harsen

[nike123]

Sir ,
When i refer the link i saw the word the moisture laden air ; word LADEN what it mean

harsen

A past participle of lade.

adj.1. Weighed down with a load; heavy: "the warmish air, laden with the rains of those thousands of miles of western sea" Hilaire Belloc.