An equation-oriented approach was developed for steady state flowsheeting of a commercial methanol plant. The loop consists of fixed bed reactor, flash separator, preheater, coolers, and compressor. For steady sate flowsheeting of the plant mathematical model of reactor and other units are needed. Reactor used in loop is a Lurgi type and its configuration is rather complex. Previously reactor ...

The operation of air-cooled chillers accounts for significant energy consumption in local commercial buildings, and low operational efficiency especially under partial load conditions and poor control are part of reasons for such huge energy consumption. Chiller efficiency can be improved by enhancing heat transfer rate in condensers. This paper considers how the chiller performance can be impr...

Th•s paper presents the equation derivation as well as the stmulation results of a non-steady state distributed model for a commonly used type of evaporators -air coolers. In contraSt to others, the model puts the SU"Css on the rcfr~gcram mass transponation occuring in the two-phase flow region mside an air cooler. The so~led slip-effect between the vapour and liquid IS taCkled by using an adva...