Application of stream merging techniques in heat exchanger network design

Chuei Tin Chang, Tai Ping Yu

Research output: Contribution to conferencePaperpeer-review


An objective of the proposed design task is to minimize the number of exchanger units in a reference network by merging and splitting process streams without energy penalty and without violating the given constraint of Δ$TAUmin. Since stream merging/ splitting implies a modification of the stream data, a new pinch point may be created and a minimum energy consumption may increase. Thus, a quantitative criterion was derived to determine the feasibility of modifying stream data without increasing the utility usage. Also, the interpretation of graph analogy to an exchanger network needs to be generalized so that the opportunities for eliminating units in the ference structure can be discovered easily. Application of stream merging techniques are summarized in the evolutionary procedures presented in the second part of this paper. The proposed design strategy consists of two phases, i.e. whole-stream merging and part-stream merging. First, before the creation of the reference structure, the possibility of mixing streams entirely is examined by applying the feasibility criterion. Based on the resulting stream data, the reference structure can be constructed by using any available design methid, e.g. Linnhoff and Hindmarsh. Then, the part-stream merging techniques are used to redistribute heat loads among exchangers so that one or more units can be eliminated from this reference network.

Original languageEnglish
Pages38B 25p
Publication statusPublished - 1988
EventPreprint - American Institute of Chemical Engineers - New Orleans, LA, USA
Duration: 1988 Mar 61988 Mar 10


OtherPreprint - American Institute of Chemical Engineers
CityNew Orleans, LA, USA

All Science Journal Classification (ASJC) codes

  • Engineering(all)


Dive into the research topics of 'Application of stream merging techniques in heat exchanger network design'. Together they form a unique fingerprint.

Cite this