Inherent safety in process plant design : an index-based approach

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Heikkilä, Anna-Mari
dc.date.accessioned 2012-02-13T13:15:15Z
dc.date.available 2012-02-13T13:15:15Z
dc.date.issued 1999-05-08
dc.identifier.isbn 951-38-5372-1
dc.identifier.issn 1455-0849
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2516
dc.description.abstract An inherently safer design is one that avoids hazards instead of controlling them, particularly by reducing the amount of hazardous material and the number of hazardous operations in the plant. Methods developed to date have largely been for the evaluating the safety of a proposed design. In the future the emphasis will be more and more on the synthesis of an inherently safer plant. At the moment it seems that the best practice is not adopted quickly enough by the potential practitioners. The aim of this work is to try to reduce this hinder by presenting an improved method for inherently safer design. In this thesis an Inherent Safety Index for conceptual chemical process design is presented. This is required, since inherent safety should be considered in the early phases of design when the major decisions on the chemical process are made. The presented methodology allows such a consideration since the index is based on the knowledge available in the preliminary process design stage. The total index is divided into Chemical and Process Inherent Safety Index. The previous is formed of subindices for reaction heats, flammability, explosiveness, toxicity, corrosiveness and chemical interaction. The latter is formed of subindices for inventory, process temperature, pressure and the safety of equipment and process structure. The equipment safety subindex was developed based on accident statistics and layout data separately for isbl and osbl areas. The subindex for process structure describes the safety from the system engineering's point of view. It is evaluated by case-based reasoning on a database of good and bad design cases i.e. experience based information on recommended process configurations and accident data. This allows the reuse of existing design experience for the design of new plants, which is often neglected. A new approach for computerized Inherent Safety Index is also presented. The index is used for the synthesis of inherently safer processes by using the index as a fitness function in the optimization of the process structure by an algorithm that is based on the combination of an genetic algorithm and case-based reasoning. Two case studies on the synthesis of inherently safer processes are given in the end. en
dc.format.extent 129
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher VTT Technical Research Centre of Finland en
dc.publisher VTT fi
dc.relation.ispartofseries VTT publications en
dc.relation.ispartofseries 384 en
dc.subject.other Chemistry en
dc.title Inherent safety in process plant design : an index-based approach en
dc.type G4 Monografiaväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Chemical Technology en
dc.contributor.department Kemian tekniikan osasto fi
dc.subject.keyword inherent safety en
dc.subject.keyword process plant design en
dc.subject.keyword safety analysis en
dc.subject.keyword case-based reasoning en
dc.subject.keyword genetic algorithm en
dc.identifier.urn urn:nbn:fi:tkk-007998
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (monografia) fi
dc.type.ontasot Doctoral dissertation (monograph) en


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