number of cubic meters of the mixture per kilogram of dry air

air temperature as measured by an ordinary thermometer, the thermometer bulb being dry. The ____refers basically to the ambient temperature

temperature of the air after it has passed through a constant pressure, ideal, adiabatic saturation process, that is after the air has passed over a large sureface of the liguid water in an insulated channel.

This temperature is reading of a thermometer whose sensing bulb is wrapped in wet muslin and evaporating into a rapid stream of sample air.

the temperature at which air becomes completely saturated and water vapor starts to condense out of the air. at this point further removal of heat would result in water vapor condesning into liguid water fog or ( if below freezing) solid hoarfrost

the temperature at which a fluid will change from the liquid phase to the vapor phase or , conversely from the vapor phase to the liquid phase is called ______

is a term used to describe the presence of the moisture of water vapor in the air

also known as moisture content or mixing ratio. the proportion of mass of water vapor per unit mass of dry air at the given conditions. its typically the ordinate of the grahp

is defined as the ratio of the actual partial pressure extered by the water vapor in any volume of air of air to the partial pressure that would be exerted by the water vapor if the water vapor in th air is saturated at the temperature of the air.

_____ is the sum of the sensible heat of the air and latent heat

the science of practice of dealingwith air mixture and their control. the discipline studies mainly dry air and water vapor mixture.

the air will take place anytime air is passed across a cooling surface whose temperature is below the initial DPT of the air. this can also be accomplished by drawing air through sprays of cold water

by separating the total heat transfer rate from the cooling coil into sensible latent heat transfer rates , a useful parameter called sensible heat factor (SHF) is defined. its also defined as the ratio of sensible heat to the toatl transfer rate

during winter, it is essential to heat and humidfy room for comforty, air can be simultaneously heater adn humdified by means of drawing it through a spray or over trays of warm water.

as the name implies during this process the air temperature drops and its humidity increases. this can be achieved by spraying cool water in the air stream.

air can be dehumidified by using a hygroscopic material whisch absorbs (take up or take in moisture by molecular actiom) or adsorbs (condense a vapor and hold upon its surface) the water vapor from the moisture

an average person dissipates 117 W of heat when standing still and 425 W when doing heavy work

heat due to conduction through building materials

heat gained through solar energy transmitted through glasss windows and other building materials

loads due to appliances and other heat producing equipments

heat gained when warn outside air is introduced into the room through cracks and door clearances

this also known as comfort air conditioning

to provide cooling or heating air for some engineerinf processes. this is known as industrial air conditioning

is the study of the properties of mixtures of air and water vapor.

is an instrument used in the study of the properties of air.

is a graphical representation of the thermodynamic properties of moist air

the process of removing moisture from the air in an air conditioning system

is an equipment used to

reduce the temperature of a water stream by

extracting heat from water and emitting it to the

atmosphere.

–The ___ tower

has the fan, basin, and piping located within the

tower structure. In this model, the fan is located

at the base.

The atmospheric cooling

towers utilize no mechanical fan to create air

flow through the tower.

towers uses fans to move large quantities of air

through the tower.

tower has one or more fans located at the top of

the tower that draws air upwards against the

downward flow of water passing around the

wooden decking or packing.

– these are equipped with

mechanical draft fans to augment airflow. Con- sequently, they are also referred to as fan-assis-

ted natural draft towers.

, the air moves vertically upward through

the fill, counter to the downward fall of water. Because of the need for extended intake and

_____ towers have a

fill configuration throughout, which the air flows

horizontally, across the downward fall of water.

or simply cooling tow- ers operate on the principle of evaporation. The working fluid and the evaporated fluid usually water) are one and the same.

operate by heat transfer

through a surface that separates the working

fluid from ambient air, such as in a heat

exchanger, utilizing convective heat

are hybrids that pass the

working fluid through a tube bundle, upon

which clean water is sprayed and a fan-

induced draft applied.

 which utilizes buoyancy via a

tall chimney. Warm, moist air naturally rises

due to the density

which uses power-driven

fan motors to force or draw air through the

tower.  Induced

– A mechanical draft tower

with a fan at the discharge which pulls air

through the tower. The fan induces hot moist

air out the discharge.

– A mechanical draft tower

with a blower type fan at the intake. The fan

forces air into the tower creating high enter-

ing and low exiting air velocities. The low

exiting velocity is much more susceptible to

recirculation.

– a hybrid type

that appears like a natural draft though air-

flow is assisted by a fan. Hyperboloid (hyperbolic)

This is the difference between the

cooling tower water inlet and outlet tempera-

ture.

– This is the difference between

the cooling tower outlet coldwater temperature

and ambient wet bulb temperature.