By: K.P. Singh

Publisher: American Society of Mechanical Engineers

Year: 1981

Abstract: Some basic relationships to characterize tubular heat exchanger thermal performance are derived in terms of the well-known state variables. It is shown that the knowledge of η (NTU), R (heat capacity rate ratio), and partial derivatives of the temperature efficiency P with respect to η and R enables complete characterization of the exchanger performance around an operating point. Thus, the exchanger performance can be readily predicted for the so-called “subdesign” conditions. Likewise, additional criteria to compare various exchanger styles for a given range of operating conditions can be developed. Two such criteria are developed in this paper.

Citation: Singh, K. “Some Fundamental Relationships for Tubular Heat Exchanger Thermal Performance,” Trans. ASME, Journal of Heat Transfer, Vol. 103, pp. 573-578 (1981).