Quantcast AIR CONDITIONING PROCESS

Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: AIR CONDITIONING PROCESS
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Fig.  17  Heater and Air Conditioner Wiring Diagram
Up
TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
Next
OPERATION - TM-5-4210-230-14P-1_280
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 BODIES AND CABS Fig.  18   Refrigerant Flow Through Air Conditioning System AIR CONDITIONING PROCESS Operation  of  the  cab  air  conditioner  is  basically  the same  as  any  mechanical  refrigeration  system,  such  as  the familiar home refrigerator. The  air  conditioning  process  is  a  cycle  in  which  the refrigerant   (heat   absorbing   agent)   is   propelled   through   a closed system to an area where is absorbs heat from the cab and is then carried to a point where the heat is dissipated to the  atmosphere.    Let's  follow  the  course  of  the  refrigerant through    the    various    components    of    the    air    conditioning system (Fig.  18). The   compressor   draws   refrigerant   vapor   from   the evaporator    and    compresses    it    to    high    pressure.        The temperature of the vapor is increased considerably (superheated) by the compression process.  Compressing the refrigerant raises the temperature at which it will condense to liquid.      In   fact   it   is   raised   so   high   that   the   vapor   under pressure  can  be  cooled  sufficiently  to  condense  by  a  flow  of air at normal outside temperatures. The  compressed  and  superheated  vapor  flows  into the  condenser.    The  air  blowing  across  the  condenser  fins removes the heat from the refrigerant causing it to condense back to liquid. Upon  leaving  the  condenser,  the  liquid  refrigerant, under high pressure, is forced into the filter-dehydrator where the drier agent removes any moisture from the refrigerant. The    expansion    valve    controls    the    flow    of    liquid refrigerant into the evaporator.  As the refrigerant passes the expansion    valve,    pressure    is    reduced    suddenly    and    it vaporizes and expands. The  expansion  valve  is  controlled  by  a  temperature sensing  bulb  and  capillary  tube  attached  to  the  outlet  of  the evaporator.      If   the   temperature   of   the   vapor   leaving   the evaporator  becomes  too  low,  the  gas  in  the  bulb  contracts. This lowers the pressure on the diaphragm and allows spring pressure  to  close  the  valve,  reducing  the  flow  of  refrigerant into  the  evaporator.    If  the  temperature  of  the  vapor  leaving the  evaporator    increases,  the  gas  within  the  bulb  expands and   increases   the   pressure   above   the   diaphragm   in   the expansion valve.  This action opens the valve to admit more refrigerant   into   the   evaporator   and   increases   the   cooling effect. CTS-2731   Page 12 PRINTED IN UNITED STATES OF AMERICA

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q Port Richey, FL 34668

Phone For Parts Inquiries: (727) 493-0744
Google +