UA and pinch point temperature difference modeling — Finding the best heat exchanger schemes

Optimising heat exchanger network synthesis using convexity properties of the logarithmic mean temperature difference

An NLP Approach for Evolution of Heat Exchanger Networks Designed by Pinch Technology

Common methods to design heat exchanger networks (HENs) by pinch technology usually need an evolutionary step to reduce the number of heat transfer units. This step <span style="font-size: 10pt; color:...

Point transformations in invariant difference schemes

In this paper, we show that when two systems of differential equations admitting a symmetry group are related by a point transformation it is always possible to generate invariant schemes, one for each system, that are also related by the same transformation. This result is used to easily obtain new invariant schemes of some differential equations. Submitted to: J. Phys. A: Math. Gen. PACS numb...

Seven-Point Difference Schemes for Hyperbolic Equations

A necessary and sufficient condition is given for all hyperbolic difference schemes that use up to nine mesh points to be of second-order accuracy. We also construct a new difference scheme for two-dimensional hyperbolic systems of conservation laws. The scheme is of second-order accuracy and requires knowledge of only seven mesh points. A stability condition is obtained and is utilized in nume...

Fuzzy C-means Modeling for Shell and Tube Heat Exchanger

A shell and tube heat exchanger is a class of heat exchanger designs seen most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications. As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows...