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OPERATING CHARACTERISTICS OF AN AIR-TO-WATER HEAT EXCHANGER USING A CLOSED-LOOP TWO-PHASE THERMOSIPHON SYSTEM.

[In Japanese. / En japonais.]

Author(s) : KAMIYA Y., CHENG K. C., TAKUMA M.

Type of article: Article

Summary

THE PURPOSE OF THE PAPER IS TO PRESENT A SIMULATION MODEL TO PREDICT OPERATING AND HEAT TRANSFER CHARACTERISTICS OF A CLOSED-LOOP TWO-PHASE THERMOSIPHON SYSTEM FROM AN AIR HEAT SOURCE WITH A TEMPERATURE OF LESS THAN 373 K (100 DEG C), TO WATER. THE TWO-PHASE THERMOSIPHON SYSTEM CONSISTS OF AN EVAPORATOR, A CONDENSER LOCATED ABOVE THE EVAPORATOR, AND CONNECTING TUBES. R113 IS USED AS THE WORKING FLUID. EXPERIMENTS ARE CONDUCTED BY CHANGING SUCH OPERATING PARAMETERS AS A HEAT SOURCE TEMPERATURE AND REFRIGERANT CHARGE LEVEL KEEPING COOLING WATER FLOW RATE, TEMPERATURE AND AIR FLOW RATE CONSTANT. THE SIMULATION MODEL TO PREDICT OPERATING AND HEAT TRANSFER CHARACTERISTICS WAS PROPOSED AND SIMULATION RESULTS WERE COMPARED WITH EXPERIMENTAL RESULTS. FAIRLY GOOD AGREEMENTS WERE OBTAINED BETWEEN SIMULATION AND EXPERIMENTAL RESULTS. THIS SIMULATION MODEL IS USEFUL FOR THEDESIGN AND THE PREDICTION OF THE OPTIMUM OPERATING CONDITIONS.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1990-2306
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 41
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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