What are the different types of air handling unit?

There are two main types of air handling unit — the ‘blow-through’ and the ‘draw-through’. The blow-through AHU has a fan which blows the air through the mixing box, cooling coil and filters before it goes to the ducting network. The draw-through AHU can be vertical or horizontal.

What are the components of air handling units?

Components of an AHU. As noted earlier, the main components of an AHU system are its casing or housing, the fan, the heating and/or cooling coil, filters, humidifiers, and mixing box.

What is an air handling unit system?

The air handling unit (AHU) is the heart of central air conditioning. It collects outside air and room air, removes dust and other particles from the collected air, adjusts the temperature and humidity and then supplies comfortable and refreshing air-conditioned air into the rooms through ducts.

How many types of AHU blower are there?

Three different Drives
Air Handling Unit Blowers/Fans are available in Three different Drives: Direct Drive : All direct motor drive Air Handling Unit Blowers/Fans are supplied with suitable Electric motor with Fan cooling and also Flame Proof. In Air Handling Unit Blowers/Fans, Impeller are Directly mounted on Shaft of Electric motor.

What is the capacity of AHU?

The AHU 180 mobile air handling unit is versatile and is particularly suitable for outdoor installation, thanks to its aluminum housing. With a maximum air volume of 20,000 m³ and an external pressure of 491 Pascal, this air handler is perfect for ventilation and fresh air.

Why do we use air handling units?

An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system. The basic function of the AHU is to take in outside air, re-condition it and supply it as fresh air to a building.

What are the types and classifications of fans?

Types of Fans
  • Axial and/or propeller fans.
  • Centrifugal (radial) fans.
  • Mixed flow fans.
  • Cross flow fans.

What is the difference between AHU and HVAC?

AHU, which is Air Handling Unit is an appliance used to circulate air. HVAC is Heating, Ventilating and Air Conditioning system. HVAC is the central unit to which AHU is connected. AHU is only a part of HVAC and as such there is hardly any difference between then two.

How many filters are used in AHU?

Inside an AHU we will typically find two sets of filters. The first set is known as the primary filters and we also then have the secondary filters. These both have different functions in an air handling unit.

Which of the following is correct sequence of the components of air handling unit?

An air handling unit where (1) is the supply air, (2) fan section, (3) vibration isolator, (4) cooling coil, (5) filter and (6) mixed air duct.

Which components are used in AHU of central AC plant?

Air Handling Unit (AHU) is used in the central AC plants. This unit consists of a blower, heating and cooling elements, filter racks or chamber, dampers, humidifiers and other central equipment in direct contact with the air flow. This does not include the ductwork through the building.

Do air handling units have refrigerant?

An air handler is usually a large metal box containing a limited subset of the components of the refrigeration cycle. Air handlers contain one of two cooling elements: chilled water or refrigerant.

What is the difference between AHU and HVAC?

AHU, which is Air Handling Unit is an appliance used to circulate air. HVAC is Heating, Ventilating and Air Conditioning system. HVAC is the central unit to which AHU is connected. AHU is only a part of HVAC and as such there is hardly any difference between then two.

What are the 3 types of air conditioning system?

  • Ducted Air Conditioning.
  • Split System Air Conditioning.
  • Multi Split Air Conditioning.
  • Controls.

What are the 4 major components of an AC unit?

Air Conditioner Components. An air conditioner is made up of many components, but the major parts doing the heavy lifting of moving the air indoors and outdoors are the evaporator, condenser, expansion valve, and compressor. Keep in mind they’re each either located outside (the hot side) or inside (the cool side).

How do you determine AHU capacity?

Typical AHU requires a flow rate of 2.4 gallons/ton. So, the flow rate should be 24 gpm for the AHU capacity of 10 TR. A typical AHU will have a Δt of 10° F, hence we assumed the AHU coil outlet temperature as 54° F. Refer water system cooling load calculations for formulae and derivations.

What is AC classification?

Air conditioning, often abbreviated as A/C or AC, is the process of removing heat from an enclosed space to achieve a more comfortable interior environment (sometimes referred to as ‘comfort cooling’) and in some cases also strictly controlling the humidity of internal air.

How many types of AC units are there?

There are six different types of air conditioners that are each designed for a different space/reason. These six types of AC units are the basic central AC, ductless, window unit, portable unit, hybrid, and geothermal.

What are the two types of air conditioning?

5 Different Types of Air Conditioners
  • Central Air Conditioners. Central AC is by far the most common type of air conditioner found in homes today. …
  • Ductless, Mini-Split Air Conditioners. …
  • Portable Air Conditioners. …
  • Hybrid Air Conditioners. …
  • Evaporative Air Conditioners.

What are 6 main parts of an air conditioning unit?

The six main air conditioning components that homeowners should be aware of are the thermostat, air blowing unit, air filter evaporator, condenser coil, and compressor.

What are the 4 factors of air conditioning?

Thus, simultaneous control of temperature, humidity, air motion, and cleanliness is known as air conditioning.