Analytic model for transient heat exchanger response

The temperature transient response of a single-phase fluid and a wall in a heat exchanger is investigated for when the other constant temperature fluid is subjected to a step change in temperature or when the single-phase fluid is subjected to a step change in mass flow rate. The dynamic behavior of the heat exchanger is approximated by an integral method assuming that the single-phase fluid temperature distribution can be expressed by a combination of the initial and final temperature distributions and a determined time function. The results are validated by comparison against numerical simulations. Excellent agreement is obtained.

[1]  W. Roetzel,et al.  Transient Response of Parallel and Counterflow Heat Exchangers , 1992 .

[2]  K. Tan,et al.  APPROXIMATE SOLUTIONS FOR TRANSIENT-RESPONSE OF A SHELL AND TUBE HEAT-EXCHANGER , 1991 .

[3]  A. L. London,et al.  THE TRANSIENT RESPONSE OF GAS TURBINE PLANT HEAT EXCHANGERS--REGENERATORS, INTERCOOLERS, PRECOOLERS, AND DUCTING. Technical Report No. 38 , 1958 .

[4]  F. E. Romie.  Transient Response of the Counterflow Heat Exchanger , 1984 .

[5]  M. A. Abdelghani-Idrissi,et al.  Analytical and experimental response time to flow rate step along a counter flow double pipe heat exchanger , 2001 .

[6]  K. Tan,et al.  Dynamics of a Shell-and-Tube Heat Exchanger with Finite Tube-Wall Heat Capacity and Finite Shell-Side Resistance , 1978 .

[7]  W. Roetzel,et al.  Dynamics of shell‐and‐tube heat exchangers to arbitrary temperature and step flow variations , 1993 .

[8]  S. Kakaç,et al.  Heat Exchangers: Thermal Hydraulic Fundamentals and Design , 1985 .

[9]  D. Bunce,et al.  Transient response of heat exchangers , 1995 .

[10]  A. London,et al.  Compact heat exchangers , 1960 .

[11]  Mohammed Lachi,et al.  The time constant of double pipe and one pass shell-and-tube heat exchangers in the case of varying fluid flow rates , 1997 .

[12]  Michael Tiller,et al.  Introduction to Physical Modeling with Modelica , 2001 .

[13]  F. E. Romie.  Response of Counterflow Heat Exchangers to Step Changes of Flow Rates , 1999 .

[14]  F. E. Romie.  Transient Response of the Parallel-Flow Heat Exchanger , 1985 .

[15]  Owen E. Potter,et al.  Dynamic simulation of a countercurrent heat exchanger modelling-start-up and frequency response , 1994 .