Transcript
2AIR-COOLED HEAT EXCHANGER LAYOUT
INTRODUCTION:
WHAT IS AN AIR COOLED HEAT EXCHANGER(ACHE)?
API 661 – AIR COOLED HEAT EXCHANGER FOR GENERAL REFINERY SERVICE
CONSTRUCTIONAL DETAILS
ONE OR MORE BUNDLES OF HEAT TRANSFER SURFACES
AIR MOVING DEVICE-FAN,BLOWER
POWER TRANSMISSION DEVICE TO MECHANICALLY ROTATE FAN,BLOWER
A PLENUM BETWEEN BUNDLES AND FAN
4AIRCOOLERS IN DIFFERENT PLOTPLAN
WE HAVE COME ACROSS AIR COOLERS ON FOLLOWING PROJECTS
GONFREVILLE
KHARGH ETHYLENE
QATAR GAS-II ( BOTH IN INLET AREA
AND UTILITY AREAS)
RASGAS-III ( UTILITY AREA)
QCS (INLET AND UTILITY AREAS)
YLNG (COMPRESSOR AREA-UNIT47)
KHURSANIA PROJECT
6AIR-COOLED HEAT EXCHANGER LAYOUT
LAYOUT REQUIRMENTS OF AIR COOLED HEAT EXCHANGER (ACHE)
AREA OF LOCATION FOR ACHE:
1. ON TOP OF MAIN PIPE RACK
• MOST COMMON LOCATION
• PIPE RACK SPACING TO BE SPECIFIED WHEN SENDING ENQUIRIES FOR COOLERS
• CLIENT APPROVAL REQUIRED FOR LOCATING ACHE ON TOP OF RACK
2. ON A SEPARATE ELEVATED STRUCTURE
• MUST BE POPERLY ELEVATED TO FACILITATE GRAVITY FEED SYSTEM
8AIR-COOLED HEAT EXCHANGER LAYOUT
ACCESS PLATFORMS ON EITHER SIDE TO ACCESS HEADER BOX
CHECK FOR THE ROOM CLEARENCES OVER ACCESS PLATFORMS
9AIR-COOLED HEAT EXCHANGER LAYOUT
IN GENERAL AVOID LOCATING PUMPS, PRV, AND CONTROL VALVESBELOW ACHE
VIBRATIONAL REQUIRMENTS HAS TO BE CONSIDERED WHILE DESIGNING
THERMAL MOVEMENT FOR LAYOUT CONSIDERATION SHALL BE FURNISHED BY THE VENDOR.
CHECK FOR THE NO. OF PASSES
NO. OF BUNDLES NEEDS TO BE KNOWN FOR KNOWING THE NO.OF NOZZLE AVAILABLE.
10AIR-COOLED HEAT EXCHANGER LAYOUT
PIPING LAYOUT REQUIRMENTS
CORRECT CONFIGURATION OF PIPING TO GIVE EQUAL OR NEAR EQUAL DISTRIBUTION
PIPING FROM OVERHEAD AS SHORT AS POSSIBLE TO MINIMIZE PRESSURE DROP
ROUTING SHOULD BE FLEXIBLE TO AVOID OVERLOADING OF NOZZLES
PROVIDING SUITABLE PIPE SUPPORTS AND ANCHORS
11AIR-COOLED HEAT EXCHANGER LAYOUT
PIPING CONFIGURATIONS
• CASCADE AND SYMMETRICAL RAKE SHOWS GOOD DISTRIBUTION
• ASYMMETRICAL RAKE SHOWS BAD DISTRIBUTION
12AIR-COOLED HEAT EXCHANGER LAYOUT
• ROUTE LINE IN ECONOMICAL PATH.
• CHECK FOR ACCESSIBILITY OF VALVES• CHECK FOR FLEXIBILITY ( GENERALY DONE IN DETAILED STAGE)• SUPPORTING CRITERIA SHALL GE CHECKED
( GENERALY DONE IN DETAILED STAGE)
14AIR-COOLED HEAT EXCHANGER LAYOUT
SIDE MOUNTED INLET HEADER
• MIN INLET PIPE RUN
• LESS FLEXIBLE
CENTRALLY MOUNTED INLET HEADER
• LONG INLET PIPE RUN
• MORE FLEXIBLE
16AIR-COOLED HEAT EXCHANGER LAYOUT
• UNIFORM DISTRIBUTION
• LINE SUFFICIENTLY FLEXIBLE
• MIN. PIPE RUN FOR INLET LINES
• LINES ARE NOT OBSTRUCTING MAINTENANCE ACCESS
AIR COOLER ARRANGMENT IN
18AIR-COOLED HEAT EXCHANGER LAYOUT
• MINIMUM INLET PIPE RUN
• NO INDIVIDUAL ISOLATION VALVES
AIR COOLER ARRANGMENT IN KHURSANIA PROJECT
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