Article,

Analytic model for transient heat exchanger response

, and .
International Journal of Heat and Mass Transfer, 46 (17): 3255--3264 (2003)
DOI: 10.1016/S0017-9310(03)00118-2

Abstract

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.

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