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To develop simulation models which can serve as a tool for the energy efficient operation of industrial processes together with their utility networks.
The software SYNEP is concerned with the process energy integration and the synthesis of optimal heat exchanger network, and the software EMS has been developed to solve the optimal management of utility systems. Both systems have been further developed, to strengthen the methods to solve industrial problems and the addition of new capabilities.

Development of SYNEP includes:
the targeting using restricted matches, which allows the energy target to be set, taking into account forbidden matches, and the calculation of minimum energy cost penalty associated;
the optimal utility system integration including the mechanical power requirements;
the introduction of heuristic rules to increase the efficiency of the heat load distribution calculation.

The main developments of EMS are:
unit initialization procedure which allows the interactive setting of temporary specifications on a unit to calculate the unit;
reverse flow valve model which allows the calculation of the inversion of flow through a valve and the associated pressure drop (this model allows the calculation of highly interconnected headers);
data files allowing easy data exchange with other software, like data reconciliation and spreadsheets;
the use of physical units other than SI.
This work is a continuation of a previous contract EN3E-0136-B which resulted in two models: SYNEP1 which simulates the energy utilisation of chemical processes and optimizes heat exchanger networks: SYNEP2 which optimizes the management of utility networks. In this project, the two models are further improved and applied to existing installations. Three tasks are foreseen.

To develop new techniques and new possibilities for the SYNEP codes. Improvements in SYNEP1 allow a more precise definition of the problems which have to be resolved. Economic, feasibility, flexibility, security, environmental, start-up and other aspects are incorporated in the model. The operator's experience will also be introduced. Connections are indicated as: forbidden, free, favourable, obligatory, etc. SYNEP2 is applied to gas turbines, where slow rolling of turbines, the standby state for boilers, the thermal losses on the headers and the heat balance are simulated. Automatic links between existing BELSIM-VALI and SYNEP2 are developed.

A second task is to draft user friendly manuals for use of the SYNEP models in industry.

Finally, SYNEP1 and SYNEP2 are evaluated with data from manufacturers (i.e. LOR and MOTOR OIL from the oil industry; KEMIRA from the fertilizer industry).

A new contract, JOUE-CT91-0080 deals with the follow-up of the project.

Funding Scheme

CSC - Cost-sharing contracts


Place Du 20 Aout 7
4000 Liege

Participants (3)


Lindsey Oil Refinery
United Kingdom
DN40 3LW Grimsby