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IIR document

Computer simulation of the performance characteristic for shell-and-tube evaporators of refrigerating systems.

Number: pap. ID: 522

Author(s) : CICONKOV R., CICONKOV S.

Summary

The performance characteristics of the shell-and-tube evaporator can be defined as a function of two independent variables Q(e) = Q(e) (t(e), t(s1)) where Qe is cooling capacity, t(e) – evaporating temperature and t(s1) – liquid inlet temperature. However, in this function there are many dependent variables which it is very difficult to calculate. These are the liquid outlet temperature (ts2), heat transfer coefficient in the refrigerant side and liquid side, overall heat transfer coefficient etc. Some of equations are in implicit forms that make calculations very difficult to solve. A mathematical model is developed for the calculation procedure which will be presented on a flow diagram. This is a base for composing a computer program, and the functioning of this program will be shown on a concrete example. For each pair (t(e), t(s1)) the coefficients of heat transfer inside tubes, outside and overall will be calculated, the liquid outlet temperature and the cooling capacity as well.

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Pages: 8 p.

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Details

  • Original title: Computer simulation of the performance characteristic for shell-and-tube evaporators of refrigerating systems.
  • Record ID : 30002023
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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