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Boiling heat-transfer coefficient variation for R407C inside horizontal tubes of a refrigerating vapour-compression plant's shell-and-tube evaporator

Author

Listed:
  • Torrella, Enrique
  • Navarro-Esbrí, Joaquín
  • Cabello, Ramón

Abstract

The present paper presents experimental results obtained from a refrigerating vapour-compression plant's shell-and-tube (1-2) evaporator working with R407C. Several tests have been carried out to study the influence of the evaporating pressure and the refrigerant's mass flow rate on the refrigerant's boiling heat-transfer coefficient inside horizontal tubes. This work has been performed by analyzing the variations of the evaporator's overall thermal-resistance, computed using the effectiveness-NTU method, considering the influence of pressure drops and glide at the evaporator, and finally transferring the results and conclusions to the boiling heat-transfer coefficient. It has been observed that the variations of the boiling heat-transfer coefficient show a dependence on the evaporating temperature and the refrigerant's mass-flow rate, which has been analyzed in the test range.

Suggested Citation

  • Torrella, Enrique & Navarro-Esbrí, Joaquín & Cabello, Ramón, 2006. "Boiling heat-transfer coefficient variation for R407C inside horizontal tubes of a refrigerating vapour-compression plant's shell-and-tube evaporator," Applied Energy, Elsevier, vol. 83(3), pages 239-252, March.
    • Handle: RePEc:eee:appene:v:83:y:2006:i:3:p:239-252
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