What happens when the air temperature and the dew point are very far apart?

What happens when the air temperature and the dew point are very far apart?

What happens when the air temperature and the dewpoint are very far apart? The air is very dry. The air is saturated.

What happens when the air temperature and the dew point is the same Choose 2 Group of answer choices?

When the dew point temperature and air temperature are equal, the air is said to be saturated. Dew point temperature is NEVER GREATER than the air temperature. Therefore, if the air cools, moisture must be removed from the air and this is accomplished through condensation.

What is one relationship between warm air and humidity?

Warm air can possess more water vapor (moisture) than cold air, so with the same amount of absolute/specific humidity, air will have a HIGHER relative humidity if the air is cooler, and a LOWER relative humidity if the air is warmer.

What is the perfect condition for dehumidification of air?

ANSWER: air is cooled below its dew point temperature No explanation is available for this question!

What is the mass of water vapor present in 1 kg of dry air?

Explanation: Humidity ratio or Specific humidity is the mass of water vapor present in 1 kg of dry air. It is generally expressed in, g / kg of dry air.

Can be cooled and dehumidified by?

When the room air passes over this coil, it gets cooled and dehumidified. In the general the cooling and dehumidification process is obtained by passing the air over coil through which the cool refrigerant, chilled water or cooled gas is passed.

How do you calculate dehumidified cfm?

1. Calculate the volume of the structure in cu. ft. (L x W x H)….You need to provide dehumidification capacity for three air changes per hour (ACH).

1. Volume = 100 x 50 x 50 = 250,000 cu. ft.
2. SCFM = 250,000 / 60 = 4,167 SCFM.
3. Dehumidification capacity = 4,167 SCFM x 3 ACH = 12,501 SCFM.

When humidity ratio of air increases what does it say?

When humidity ratio of air ____ air is said to be dehumidified. Explanation: when it increases, air is said to be humidified. Explanation: These are the ways of cooling and dehumidifying air. 5.

How do you keep humid air cool?

Chilling out your environment is largely a matter of working with convection—the tendency of hot air to rise. The best way to cool off a room is to pull heat up and out. As a bonus, proper ventilation also controls humidity, so that gross sticky feeling can fly away, too.

How do you measure moisture in air?

Air and Water Vapour Mixtures Percentage saturation = 100 × g g ss = 100 × 0.010 08 0.020 16 = 50 % sat . Since most air conditioning calculations are based on weights of air and moisture, percentage saturation is usually employed, and moisture content is expressed as kilograms per kilogram of dry air.

Which one of the following is correct in a sensible heating or cooling process?

During sensible cooling process the dry bulb (DB) temperature and wet bulb (WB) temperature of the air reduces, while the latent heat of the air, and the dew point (DP) temperature of the air remains constant. In general the sensible cooling process is carried out by passing the air over the coil.

Is sensible humidity a cooling ratio?

In addition, we see the specific enthalpy also increases. Sensible cooling is the process in which the dry bulb temperature is reduced but without a change in humidity ratio. During the sensible cooling process, the relative humidity increases, the specific enthalpy is reduced, and the specific volume is also reduced.

What decreases during sensible cooling of air?

Solution(By Examveda Team) During sensible heating of air Relative humidity decreases.

What are the general comfort conditions in an air conditioning system?

Humans generally feel comfortable between temperatures of 22 °C to 27 °C and a relative humidity of 40% to 60%. first cool the air to 14 °C (this removes some of the water from the air), and then heat the air to 24 °C. the heat and mass of water removed in the cooling phase, and the heat added in the heating phase.

Which of the following factor does not affect comfort air conditioning?

a)Temperature of airb)Humidity of airc)Air conditioning unitd)Purity of airCorrect answer is option ‘C’. The Questions and Answers of Which of the following factor does not affect comfort air conditioning? a)Temperature of airb)Humidity of airc)Air conditioning unitd)Purity of airCorrect answer is option ‘C’.

What are the factors that affect human comfort?

Environmental factors

• Air temperature. This is the temperature of the air surrounding the body.
• Radiant temperature. Thermal radiation is the heat that radiates from a warm object.
• Air velocity.
• Humidity.
• Clothing insulation.
• Work rate/metabolic heat.

Which are the factors governing effective temperature?

Which are the factors governing effective temperature? The degree of warmth or cold felt by a human body depends mainly on following three factors: (a) Dry bulb temperature (b) Relative humidity (c) Air velocity. Effective temperature is used to evaluate the combined effect of all these factors.

What is the normal effective temperature?

This calculation gives us an effective temperature of the Earth of 252 K (−21 °C). The average temperature of the Earth is 288 K (15 °C). One reason for the difference between the two values is due to the greenhouse effect, which increases the average temperature of the Earth’s surface.

What is standard effective temperature?

temperature, standard effective (SET): the temperature of an imaginary environment at 50 percent [relative humidity], less than 0.1 meters per second air speed, and [the mean radiant temperature equals the air temperature], in which the total heat loss from the skin of an imaginary occupant with an activity level of …

What is meant by effective temperature?

The temperature at which motionless saturated air would induce, in a sedentary worker wearing ordinary indoor clothing, the same sensation of comfort as that induced by the actual conditions of temperature, humidity, and air movement.

What is blackbody temperature?

The temperature that the surface of a body (such as a planet, like the Earth) would be if it were not warmed by its own atmosphere. The black body temperature of the Earth is -23°C, but the actual surface temperature is about 15°C.

What is effective radiative temperature?

The term effective radiating temperature is the temperature that a true blackbody. would need to have to radiate the same amount of energy as an object radiates. It also can be shown from Planck’s law that the energy flux emitted by a blackbody is. related to the fourth power of the body’s absolute temperature in K.