4-a) Air at 10 °C dry bulb temperature and 90 % relative humidity is to be heated and humidified to 35 °C dry bulb temperature and 22.5 °C wet bulb temperature. The air is pre-heated sensible before passing to the air washer in which water is recirculated. The relative humidity of the air coming out of the air washer is 90%. This air is again reheated sensible to obtain the final desired condition. Find: (a) the temperature to which the air should be pre-heated, (b) the total heating required, (c) the make up water required in the air washer, and (d) the humidifying efficiency of the air washer.

Q: I dry air and water vapour is at a temperature of 21°C and t

A:

Q: Outside air at 38 °C db and 60% relative humidity enters a cooling and dehumidifying device at a…

A: Air outside conditions:Inside conditions:assume air outside flow is 100%

Q: In an air-water vapor mixture at 30°C, the partial pressure of the water vapor is 1.7 kPa and the…

A:

Q: 15- For a pipe carrying chilled water at 10°C through a room at 21°C. What is the maximum relative…

A: Here we will infer value from steam table and use th to get maximum relative humidity

Q: saturation pressure of water at 35°C is 5.63 KPa. The humidity ratio of the air (in gram/kg of dry…

A: Given data,  T=35°C  RH=60% =0.6  P1=0.1 MPa. Saturated air pressure P=5.63 kPa.  Saturated water…

Q: what is the equation to start this problem? air that is at its dew point of 5 degrees celcius is…

A: The outside air is at the dew point.Thus, its water vapor pressure is the saturated vapor pressure…

Q: An ice pop mold is filled with a hot (80°C) mixture of jelly and fruit juice, and placed in a -20 °C…

A: Given:Th=80°CTc=-20°Ct=12 hours

Q: Air at 90°C having percentage humidity of 5% is cooled to 50°C. What is the dew point of air at…

A: Given:Initial dry bulb temperature, T1 = 90°CRelative humidity,  = 5% or 0.05Final dry bulb…

Q: In an air-water vapor mixture at 30°C, the partial pressure of the water vapor is 1.7 kPa and the…

A:

Q: Air is heated and humidified in air conditioning process. Mist humidifier is used. The mass flow…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: The total volume of a new house is 618 m. Before the heat is turned on, the air temperature inside…

A: The relative humidity of air tells how much water vapor is present at the given temperature relative…

Q: Why do we need to control the temperature and humidity in the aircraft hangar? How does it affect…

A: A hangar is a closed building structure to hold aircraft or spacecraft. Hangars are built of metal,…

Q: Using a psychrometric diagram, describe the heating and humidification process and the following…

A: Write the given values along with suitable variables.

Q: In continental interior areas of Canada, winter air is usually cold and dry (contains little…

A: Given: T1 = -10 C RH = 70% T2 = 20 C To find: New relative humidity

Q: Arflow of 4.5 ms at 1 atm, 10C, and 80% relative humidty is conditioned to 25°C and 50% relative…

A: Air flow rate Q=4.5m3/s ρ1=1atm=1.01325 barT1=10°Cθ1=80%T2=25°Cθ3=50%

Q: There are 300 cubic meter/min of atmospheric air initially at 25 C wet bulb temperature and 60 % RH…

A: Given: Flow rate of the atmospheric air→Qa=300 m3/min=5 m3/s Wet bulb temperature of the atmospheric…

Q: 15- For a pipe carrying chilled water at 10°C through a room at 21°C. What is the maximum relative…

A: Here we will use ste table to get the pressure at both temperature to use them to get maximum…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.