air at 1 atm 15 C and 60 percent relative humidity is first heated to 20 C
Added by Heidi M.
Step 1
Using standard tables, the SVP at 15°C is approximately 17.04 mmHg. Show more…
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Saturated air at 2°C is required to be supplied to a room where the temperature must be held at 20°C with a relative humidity of 50%. The air is heated and then water at 10°C is sprayed in to give the required humidity. Determine the temperature to which the air must be heated and the mass of spray water required per m³ of air at room conditions. Assume that the total pressure is constant at 1.013 bar and neglect the fan power.
Sri K.
Air at $1 \mathrm{atm}, 15^{\circ} \mathrm{C},$ and 60 percent relative humidity is first heated to $20^{\circ} \mathrm{C}$ in a heating section and then humidified by introducing water vapor. The air leaves the humidifying section at $25^{\circ} \mathrm{C}$ and 65 percent relative humidity. Determine $(a)$ the amount of steam added to the air, and $(b)$ the amount of heat transfer to the air in the heating section.
(III) Air that is at its dew point of $5^{\circ} \mathrm{C}$ is drawn into a building where it is heated to $20^{\circ} \mathrm{C}$ . What will be the relative humidity at this temperature? Assume constant pressure of 1.0 $\mathrm{atm} .$ Take into account the expansion of the air.
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