Thermosyphon - Free Cooling Smardt Chiller with Thermosyphon

Definition Free Cooling = chilled water production without compressor by low ambient temperature Smardt-OPK Thermosyphon free cooling Oil free turbo compressor + flooded evaporator + air-cooled condenser + Smardt-OPK know-how Smardt Chiller Group | 2013 | Philipp Ampferl Page 2

Compressor mode Condenser Com-pres-sor Expansion valve Evaporator Refrigerant liquid Refrigerant gas Expansion valve expansionvalve Coolant outlet Coolant inlet Evaporator Evaporator Smardt Chiller Group | 2013 | Philipp Ampferl Page 3

Thermosyphon - free cooling mode Thermosyphon free cooling = chilled water without compressor - one refrigerant circuit  „either or“ function Condenser Free- cooling valve Com-pressor Refrigerant liquid Refrigerant gas Coolant outlet Coolant inlet Evaporator Smardt Chiller Group | 2013 | Philipp Ampferl Page 4

Compressor vs Thermosyphon mode Compressor mode Thermosyphon free cooling mode Condenser Condenser Condenser Free- cooling valve Expansion valve Com-pressor Com-pressor Refrigerant liquid Refrigerant gas Refrigerant liquid Refrigerant gas Coolant outlet Coolant inlet Coolant outlet Coolant inlet Evaporator Evaporator Evaporator Smardt Chiller Group | 2013 | Philipp Ampferl Page 5

Compressor operation Two refrigerant circuits  „and“ function Compressor mode Compressor mode Condenser Condenser Exp. valve Compressor Exp. valve Refrigerant liquid Refrigerant gas Refrigerant liquid Refrigerant gas ON AUS ON Evaporator Coolant inlet Coolant outlet Smardt Chiller Group | 2013 | Philipp Ampferl Page 6

Parallel operation Thermosyphon Compressor mode ON OFF Condenser Freecooling valve Exp. valve Compressor Refriger. liquid Refrigerant gas Refrigerant liquid Refrigerant gas AUS ON OFF Evaporator Coolant inlet Coolant outlet Smardt Chiller Group | 2013 | Philipp Ampferl Page 7

Thermosyphon free cooling Condenser Condenser Free- cooling valve Compressor Free-cooling valve AUS OFF OFF Evaporator Coolant inlet Coolant outlet Smardt Chiller Group | 2013 | Philipp Ampferl Page 8

Thermosyphon free cooling Condenser Condenser Free- cooling valve Compressor OFF AUS OFF Evaporator Coolant inlet Coolant outlet 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

Ambient air temperature of Stuttgart according to DIN 4710 Example Stuttgart Ambient air temperature of Stuttgart according to DIN 4710 Hours per year Ambient air temperature Smardt Chiller Group | 2013 | Philipp Ampferl Page 11

Example Stuttgart Percentage Thermosyphon free cooling mode Load Compressor mode Thermosyphon mode Load Chilled water outlet temp. For a ∆T of 10°C between Evaporator outlet temp. and ambient temp. Smardt Chiller Group | 2013 | Philipp Ampferl Page 12

Energy consumption compressor Energy consumption without Thermosyphon Energy consumption with Thermosyphon compressor work p. a/ cooling work p.a. Evaporator outlet temperature 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 Page 15