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Area selection for a small-scale lng plant installation using multicriteria analysis and geographic information systems

Kalogiannis Apostolos

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Year 2021
Type of Item Diploma Work
Bibliographic Citation Απόστολος Καλογιάννης, "Χωροθέτηση μονάδας υγροποιημένου φυσικού αερίου μικρής κλίμακας με πολυκριτηριακή ανάλυση και χρήση γεωγραφικών συστημάτων πληροφοριών", Διπλωματική Εργασία, Σχολή Χημικών Μηχανικών και Μηχανικών Περιβάλλοντος, Πολυτεχνείο Κρήτης, Χανιά, Ελλάς, 2021
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The increase in energy needs as well as the need to reduce the environmental footprint have in recent decades put Natural Gas (LNG) in an advantageous position as a form of energy. It is a cleaner and more environmentally friendly energy source than other fossil fuels (oil, coal) as it has lower greenhouse gas emissions. However, its transportation often becomes difficult, especially in remote areas, both technologically and economically (mainly due to the necessary use of pipeline systems). The solution of the transfer difficulties is the process of Liquefaction (LNG), which presents several advantages in the ability to promote by various means, in flexibility but also in safety. In recent years, small-scale LNG units have emerged and are operating as storage and supply units. These units can contribute to the development of remote areas, islands or islets and at the same time reduce the environmental footprint by replacing the most polluting forms of energy with Liquefied Natural Gas (and consequently Natural Gas).The purpose of this bachelor’s thesis is to identify, determine and finally decide on the optimal location of a small-scale unit of Liquefied Natural Gas in a case study in the area of ​​the Prefecture of Chania. With the use of Geographic Information Systems in combination with the existing environmental legislation for Natural gas transmission systems, the possible locations for the installation and operation of the unit are selected. The evaluation of the alternative positions and finally the selection of the best of them for the LNG unit is done with the help of the multi-criteria method of the Analytical Hierarchical Classification (AHP). The Analytical Hierarchy process is a method widely used in business decision making. Comparisons are made with the help of experts with long experience in decision-making problems (such as the problem described in this bachelor’s thesis). Also, for further testing, three different evaluation scenarios are presented, favoring different categories of criteria during the comparisons in order to confirm the results.Through the evaluation of three alternatives, the best location for the location of the unit was selected, which brings together the highest performance. The reliability of the method as well as the correctness of the decision making of the problem are confirmed by the consistency check of the Analytical Hierarchical Classification (AHP). Finally, this methodology is proposed as a flexible and effective tool in the location of small-scale Liquefied Natural Gas units, but also in general, in decision support processes in various problems of study and construction of technical projects.

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