The transient operation of a multipass shell-and-tube heat exchanger with baffles is described by a multicell dynamic model where every cell represents a specific part of the exchanger. The proposed modeling technique can be used in a digital computer for the dynamic simulation of almost any type of shell-and-tube heat exchanger. The model includes time-dependent inlet conditions for both the cold and the hot streams. Hence, a number of start-up cases can be simulated and, once the system reaches a stationary operating point, a disturbance can be introduced in the inlet temperatures or the flow rates. This particular feature makes the model very useful not only for design purposes but also for transient analysis and control system design.

Dynamic Simulation of Shell-and-Tube Heat Exchangers

Object-oriented modeling for the transient response simulation of multi-pass shell-and-tube heat exchangers as applied in active indirect thermal energy storage systems for concentrated solar power

Simulation of dynamical response of a countercurrent heat exchanger to inlet temperature or mass flow rate change

Reliable compartmental models for double-pipe heat exchangers: An analytical study

Transient behaviour of multipass shell-and-tube heat exchangers

A quasi-finite-element model of a multipass shell-and-tube heat exchanger is developed after the method of Gaddis and SchlUnder. The present model includes time-dependent inlet conditions and heat exchange. It is therefore applicable as a tool in system modeling for dynamic processes involving this type of heat exchanger. Under steady-state conditions, the present model reduces to that of Gaddis and SchlUnder.

E. N. GANl

Papers

Time-Dependent Heat Exchanger Modeling