Question

(HVAC)

in design of a channel network for distribution of air How and With what equipment the final adjustment of the flow of air reaches to each region is Set?

Answer 1

Air conditioning is the process of conditioning of indoor air to maintain its temperature, humidity, velocity and cleanliness inside the room or desired location at a desired level for human comfort or any industrial process. Air handler or air handling unit (AHU) is one of the most essential and major parts of an air conditioning system. AHU is a large metal box that consists of a blower, heating or cooling elements, filter racks or chambers, sound attenuators and dampers. AHU is basically used to condition indoor air with their heating, cooling, humidification and de-humidification functions in a HVAC system.

Equipment

1. Casing

2.Duct

3.The Mixing Chamber

4.Filters

5.HEPA Filter

6.Electrostatic Filter

Air Distribution System

After transmitting conditioned supply air from the air handling unit to the room, it has to be distributed to the conditioned space. So, it is very important to design the air distribution system properly. It is found that sometimes the efficiency of an air distribution system becomes low in the range of 60 – 75% due to the poor design. There is a scope of improving the efficiency upto 80% or more with proper installation of distribution system. Proper designing and installation of the air distribution system can save money . Moreover, efficient distribution system also reduces the equipment size.

Types of Air Distribution Devices

1.Grilles and Registers

2.Ceiling Diffusers

3.

Slot Diffusers

Slot diffusers are made up of plenum box with single or multiple slots and air deflecting vanes. These types of diffusers are mounted on either side of walls or in the ceiling. Linear slot diffusers are mounted on the sidewalls of the conditioned room. These are used for supplying both supply air and return air. These diffusers are particularly suitable for large open-spaces as long as 30 meters in length that require flexibility to suit changing occupant distribution. the photograph of conditioned space with linear slot diffusers mounted on the ceiling.