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RECOMMENDED   READING   LIST - 14101_34
Type  I  liquid-cooling  system

Fire Controlman Volume 04-Fire Control Maintenance Concepts
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CHAPTER  2 LIQUID-COOLING SYSTEMS LEARNING   OBJECTIVES Upon  completing  this  chapter,  you  should  be  able  to  do  the following: 1.  Identify  the  different  types  of  liquid-cooling  systems  for electronic   fire-control   equipment. 2.  Identify  the  components  for  the  liquid-cooling  systems. 3.  Identify  the  maintenance  responsibilities  for  the  liquid- cooling  systems  used  by  Fire  Controlmen. INTRODUCTION Cooling   systems   are   essential   to   the   satisfactory operation  of  a  shipboard  weapons  system.  In  fact, some   form   of   cooling   is   required   for   all   shipboard electronic  equipment,  and  liquid  cooling  is  especially efficient  for  the  transfer  of  large  amounts  of  heat.  To maintain   cooling   systems,   you   must   have   a   broad understanding  of  the  different  types  of  liquid-cooling systems  with  which  you  are  involved.  As  a  Fire  Con- trolman,  and  because  you  operate  and  maintain  elec- trical   and   electronic   equipment,   you   are   required   to have  a  thorough  knowledge  of  liquid-cooling  systems. This   chapter   discusses   basic   liquid-cooling systems,  liquid-cooling  systems  configurations,  and liquid-cooling   systems   for   the   Mk   92   fire-control system   (FCS).   It   also   discusses   the   maintenance   re- sponsibilities  you  have  as  a  Fire  Controlman  for  these systems.  For  more  detailed  information  on  these  and other  cooling  systems,  consult  your  applicable  oper- ating  procedures  and   Basic  Liquid  Cooling  Systems for   Shipboard   Electronics,   NAVSEA   0948-LP-122- 8010. BASIC   LIQUID-COOLING   SYSTEMS The  typical  liquid-cooling  system  is  composed  of two   basic   cooling   systems:   primary   and   secondary. These  two  systems  are  discussed  briefly  in  this  sec- tion. PRIMARY   LIQUID-COOLING   SYSTEM The  primary  liquid-cooling  system  provides  the initial  source  of  cooling  water  that  can  be  either  sea- water  or  chilled  water  from  the  ship’s  air-conditioning plant,  or  a  combination  of  both.  Figures  2-1,  2-2,  and 2-3   show   the   basic   arrangement   of   liquid-cooling systems  that  use  seawater  and  chilled  water.  You  are encouraged  to  refer  to  these  three  figures  as  you  study this   chapter. In  figure  2-1,  seawater  from  a  sea  connection  is pumped  by  a  seawater  circulating  pump  in  one  of  the ship’s  engineering  spaces  through  a  duplex  strainer  to remove  all  debris  and  then  is  pumped  through  the tubes  of  a  heat  exchanger.  Finally,  the  seawater  is  dis- charged  back  into  the  sea  at  an  overboard  discharge. 2-1






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