Amount of water in air
Water by weight contained in 1 m3 of saturated water
( C.A. Cavalli Termodinamica industriale – Hoepli)
| Tempearture in oC | Contained water (grams of water vapor) g |
| -10 | 2.15 |
| 0 | 4.89 |
| 10 | 9.54 |
| 20 | 17.7 |
| 30 | 31.7 |
| 40 | 55.1 |
| 50 | 94.20 |
| 60 | 160.36 |
| 70 | 282.97 |
Relative humidity is
the percentage of water vapor contained in the air contains under
certain conditions, that is, in relation to the quantity of water
vapor contained in saturated air under same conditions.
the percentage of water vapor contained in the air contains under
certain conditions, that is, in relation to the quantity of water
vapor contained in saturated air under same conditions.
For example:
If relative humidity
is 80% and the temperature of 20 ° C, since saturated air contains
17.7 g / m3, the air taken from environment is considered
to contain 80% of the water, or better 0.8×17.7 = 14.6 grams of
water per m3.
is 80% and the temperature of 20 ° C, since saturated air contains
17.7 g / m3, the air taken from environment is considered
to contain 80% of the water, or better 0.8×17.7 = 14.6 grams of
water per m3.
Data
table (grams of water per m3 as a function of temperature)
table (grams of water per m3 as a function of temperature)
| t (oC) | -10 | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 |
| x (g) | 2.15 | 4.89 | 9.54 | 17.7 | 31.7 | 55.1 | 94.2 | 160.36 | 282.97 |
Graph
(grams of water per m3 as a function of temperature)
(grams of water per m3 as a function of temperature)
