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Thermosyphon - Free Cooling Smardt Chiller with Thermosyphon
| Date post: | 22-Dec-2015 |
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Documents |
| Upload: | dinah-phelps |
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Thermosyphon - Free Cooling
Smardt Chiller with Thermosyphon
Definition
• Free Cooling = chilled water production without compressor by low ambient temperature
Smardt-OPK Thermosyphon free coolingOil free turbo compressor + floodedevaporator + air-cooled condenser +Smardt-OPK know-howSmardt Chiller Group | 2013 | Philipp Ampferl
Page 2
Condenser
Compressor
Coolant outletCoolant inlet
Evaporator
expansionvalveRefrigerant liquidRefrigerant gas
Compressor mode
Condenser
Com-pres-sor
Expansion valve
Evaporator
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 3
Refrigerant liquidRefrigerant gas
Coolant outletCoolant inlet
Evaporator
Thermosyphon - free cooling mode
Thermosyphon free cooling = chilled water without compressor - onerefrigerant circuit „either or“ function
Com-pressor
Condenser
Free-coolingvalve
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 4
Expansion valve
Condenser
Coolant outletCoolant inlet
Evaporator
Refrigerant liquidRefrigerant gas
Thermosyphon free cooling mode
Refrigerant liquidRefrigerant gas
Coolant outletCoolant inlet
Compressor vs Thermosyphon mode
Compressor mode
Com-pressor
Com-pressor
CondenserCondenser
EvaporatorEvaporator
Free-coolingvalve
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 5
AUSRefrigerant liquidRefrigerant gas
Coolant outlet
Refrigerant liquid
Refrigerant gas ON ON
Coolant inlet
Compressor operation
Compressor mode Compressor mode
Compressor
CondenserCondenser
Exp. valve
Exp. valve
Evaporator
Two refrigerant circuits „and“ function
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 6
AUSOFF ONRefrigerant liquidRefrigerant gas
Refriger. liquidRefrigerant gas
Coolant inlet
Parallel operation
Compressor modeThermosyphon
Coolant outlet
Compressor
CondenserCondenser
Exp. valve
Evaporator
Freecooling valve
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 7
AUSOFF OFF
Coolant outlet Coolant inlet
Thermosyphon free cooling
Thermosyphon Thermosyphon
Compressor
Free-cooling valve
Free-cooling valve
Condenser Condenser
Evaporator
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 8
AUSOFF OFF
Coolant outlet Coolant inlet
Thermosyphon free cooling
Compressor
Thermosyphon Thermosyphon
Condenser Condenser
Evaporator
Free-cooling valve
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 9
Advantages of Thermosyphon
Lower investment • No separate dry cooler system • No additional water pipes and pumps needed • Smaller footprint
Reduced power consumption/ Environment-friendly
• No loss of efficiency by heat transfer (heat exchanger glycol/water)
• No additional free cooling pumps• Lower sound pressure
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 10
Example StuttgartAmbient air temperature of Stuttgart according to
DIN 4710
Ambient air temperature
Hou
rs p
er y
ear
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 11
Example Stuttgart
For a ∆T of 10°C between Evaporator outlet temp. and ambient temp.
Load
Percentage Thermosyphon free cooling mode
Chilled water outlet temp.
Compressor mode
Thermosyphon mode
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 12
Energy consumption compressor
Evaporator outlet temperature
com
pres
sor w
ork
p. a
/ coo
ling
wor
k p.
a.Energy consumption without Thermosyphon
Energy consumption with Thermosyphon
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 13
Thermosyphon models
Air-cooled Smardt-Chiller Split Smardt-Chiller
Smardt Chiller Group | 2013 | Philipp Ampferl
Page 14
Thank you for your attention!
Smardt Chiller Group | 2013 | Philipp Ampferl
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