Air Cooled vs. Water Cooled ChillersFull description
It is an new type of Heat Exchanger using in new industries...Full description
information about turbine condenser
Air Cooled Heat Exchanger
Air-Cooled Heat Exchangers
Process engineering guide
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Introducing….
Standards for AIR COOLED CONDENSERS
By Dave Sanderlin President -‐ SPIG USA
2014 ACCUG 1
First Traditional ACC Install in 1939 è DRY COOLING is 75 Years Old in 2014
Courtesy of GEA 2
Developing the Standards STEAM SURFACE CONDENSERS
AIR COOLED CONDENSERS
3rd EdiLon – 1952 11th EdiLon -‐ 2012
1st EdiLon -‐ 2011
3
Scope of the ACC Standard 1. Basic Design ConsideraLons • process parameters, velocity limits and corrosion allowances • airflow and air moving systems 2. Performance and OperaLon •
fouling and performance margins
• •
cold weather and low load wind effects and tesLng
3. InstrumentaLon & Controls • freeze protecLon and controls •
drainpot and condensate tank capaciLes
4. Process ConnecLons • bypass and drain energy limitaLons 5. Ven&ng Capaci&es 6. TesLng, Commissioning and TroubleshooLng
4
SSC vs ACC 400 MW Example
SSC
ACC
28,000
135,000
5x
Surface Exposed to Air Inleakage, ]2
1800
135,000
75x
Field Welds, ]
700
18,000
26x
Total Internal Surface, ]2
5
SSC vs ACC Vent Capacity Comparison 35
HEI Vent Capacity, SCFM
30 25 20 ACC 1st EdiLon
15
SSC 10th EdiLon
10 5
200 MWè 130% increase
500 MWè 150% increase
0 0
500
1000
1500
2000
2500
3000
3500
Primary Exhaust Flow, PPH (x 1000)
6
4000
4500
Vacuum Decay Testing
1. Performed at least annually (or as required) 2. Acceptance criteria is project and condiLon specific • •
IniLal install < 25% of installed capacity (per HEI) Performance tesLng < 50% of installed capacity (per ASME)
3. Ask OEM for specific acceptance criteria – generic standards do not apply to large ACCs (e.g. 0.02 “HgA/min) 4. Consider installing flow transmikers on Air Removal Systems and monitor via data historian
