AIRCONDITIONING ppt.pptx

download AIRCONDITIONING ppt.pptx

of 13

  • date post

    14-Apr-2018
  • Category

    Documents

  • view

    235
  • download

    4

Embed Size (px)

Transcript of AIRCONDITIONING ppt.pptx

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    1/13

    AIRCONDITIONING

    TYPES OF AIR CONDITIONERS

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    2/13

    The selection of equipment for heating, cooling &

    ventilating is a complex design decision that mustbalance with:

    * Heating* Cooling needs

    * Energy efficiency* Humidity control* Potential for natural ventilation* Adherence to codes and standards

    * Outdoor air quantity and quality* Indoor air quality and* Cost.

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    3/13

    Sequential activities related to making conditioned air

    Air conditioning is a process which cools (or heats),cleans, circulates, freshens air & control its moisture

    content simultaneously.

    FreshAir inlet

    Air Filters

    Air heaters

    Air coolers

    Blower fan

    Humidifiers

    Conditioned air is circulated by compression & suctioncreated by the blower/centrifugal flow fan. Both supply& return are parts of air circulation system.

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    4/13

    TYPES OF AIR CONDITIONING

    CentralAir ConditioningSystem

    UnitAir ConditioningSystem

    AHU basedCompartmentalAir ConditioningSystem

    UnitAir Conditioners

    Split AC PackagedType

    Ductable Non Ductable

    The systems are basically the same as far as making theconditioned air is concerned, the only difference beingwhere it is prepared and methods of supply & return.

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    5/13

    Centrally placed plantdistributing air to all use spaceswith use of ducting network. Nearly 80% of air returnedback by return air ducts. Situated along with ancillary

    plants & equipments preferablyon GF. Delivers air to weather makerrm. From where it is circulatedvertically & horizontally.

    Central Air Conditioning& Heating System

    CENTRAL AIR CONDITIONING SYSTEM

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    6/13

    AHU BASED AIR

    CONDITIONING SYSTEM

    For preparation of conditioned air building is divided part wiseand floor wise which is managed by AHUs. These self functioning units are conditioning air and supplying itto use spaces

    Nearly 60-70% of air returned back by return air ducts to AHUs. No vertical connection between AHUs for fire fire safety. Chilled water @ 5-7 deg C is supplied by insulated Cu tubesfrom chiller plants. Used water is returned back.Chilling plant for AC load of more than 50 TR.

    Air Handling Units

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    7/13

    SPLIT SYSTEM OF AIR

    CONDITIONING

    Single or Multi Split- Ductable or Non Ductable. Works on principle of splitting or division of Unit AC System. Reason being mainly the problem of getting external wall for

    fresh air & release of hot air.Refrigerating machine along with noise generating units likecompressors are kept away. Ceiling, Floor or Wall mounted.

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    8/13

    A window air conditioner unit implements a complete air conditioner

    in a small space. The units are made small enough to fit into a standardwindow frame.

    It contains: A compressor

    An expansion valve

    A hot coil (on the outside)

    A chilled coil (on the inside)

    Two fans

    A control unit

    The fans blow air over the coils to improve their ability to dissipate

    heat (to the outside air) and cold (to the room being cooled).

    WINDOW UNIT AIR CONDITIONING

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    9/13

    AIR CONDITIONING & HEATING WITH ROOM UNITS

    Room units condition the air in one room

    Self-contained systems

    Cooling only or heating/cooling models

    Units that provide heating can use electric stripheaters or reverse-cycle refrigeration (heat pump)

    Some units can be used to condition the air in morethan one room

    http://en.wikipedia.org/wiki/File:Air_conditioning_unit-en.svg
  • 7/27/2019 AIRCONDITIONING ppt.pptx

    10/13

    ROOM AIR CONDITIONING: COOLING

    Can be window or though-the-wall type units

    Most units have one fan motor that is used for both theevaporator and condenser (2 shafts)

    Unit capacity ranges from 4,000 to 24,000 btu/h

    Units can be front or top discharge

    Units can be fixed to the case or have a chassis that slides outof the case (sleeve)

    Slide-out chassis are easier to service Installed in the window or through the wall

    Units should have a dedicated electric circuit

    Unit must be properly supported

    Air must be able to circulate freely

    Through the wall units can be installed during buildingconstruction (sleeves are installed when walls are constructedand the units are slid in afterwards)

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    11/13

    INSIDE OUTSIDE

    Brace kit suppliedwith unit

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    12/13

    Return air to theunit

    Supply air to thespace

    Window unit withfront discharge

  • 7/27/2019 AIRCONDITIONING ppt.pptx

    13/13

    Return air to theunit

    Supply air to thespace

    Wall unit with topair discharge