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Distributed model for analysis of the transient fluid refrigerant flow along tube-fin evaporators.

Number: pap. 1212

Author(s) : NEVES PIMENTA P. H., SEIXLACK A. L.

Summary

This work presents a numerical model to simulate the steady and transient flow and heat transfer between the refrigerant fluid and outside air along tube-fin evaporators commonly used in air conditioning and refrigeration systems. The fundamental equations of mass conservation, momentum and energy conservation governing the refrigerant flow are solved in order to evaluate the velocity, pressure and specific enthalpy of the refrigerant fluid. The energy and mass (humidity) conservation equations for the air flow are solved in order to evaluate the temperature and absolute humidity of the air crossing the evaporator, respectively. The energy conservation equation for the evaporator tube wall is also solved to obtain the wall temperature distribution. The governing equations are integrated numerically and the resulting algebraic system of equations is solved by Newton-Raphson’s method. Comparisons between experimental and numerical results available in open literature and those obtained in this work along tube-fin evaporators working with refrigerant R-134a in different operating conditions show good agreement for both steady and unsteady state.

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Pages: 7

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Details

  • Original title: Distributed model for analysis of the transient fluid refrigerant flow along tube-fin evaporators.
  • Record ID : 30024180
  • Languages: English
  • Source: CYTEF 2018. IX Congreso Ibérico y VII Congreso Iberoamericano de Ciencias y Técnicas del Frío, Valencia, España, 19-21 junio 2018.
  • Publication date: 2018/06/19

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