Σύνδεση Μελών

Σύνδεση με προνόμια ΕΛ.Ι.Ν.Τ.

Software Tool for Rapid Evaluation of Marine Engine Performance in Service

ABSTRACT

In a previous publication, the methodology for evaluation of the performance of a marine engine in service was presented. This methodology involves the comparison of measured data from the “service report” from the ship, to “expected values” of the various parameters, obtained via simulations, using a thermodynamic model adapted and calibrated for the specific shipboard engine.

The process of producing “expected” performance values using the model is somewhat complex and time consuming. A software tool is presented here, which uses the methodology as foundation, but allows rapid, almost real-time, evaluation of engine performance by comparisons of “measured” and “expected” values.  If the model of the specific engine is set up and calibrated with the engine shop test data and then validated with the ship trials data, then it can be used to produce predictions by simulating any engine load point at any operating conditions. The range of possible operating conditions of an engine (load, speed, fuel type, environmental conditions….) is well defined. Thus, the model can run parametrically a-priori, for all the possible combinations (factorial) of the operating conditions. The total run-time for all permutations is obviously large, but the runs can be performed unattended. The volume of results is also rather large, but can be handled efficiently with a database application (e.g. for a set of 300,000 combinations, which can be considered a HYPERCUBE of performance data, it is about 150MB per engine). Then, for any set of operating conditions of the engine, the extraction of “expected” values of performance parameterscan be performed by successive interpolation in this Hypercube, which only takes a few seconds! Thus the comparison of the “observed” (measured)  values included in a service report and the “expected” values at the same operating conditions, is almost instantaneous and immediately indicates the engine parameters which are within allowable limits, as well as those which are off-limits and in need of further scrutiny. The tool can be integrated with existing systems for producing and archiving service reports on-board, or at the main office of a shipping company. The software tool, as well as examples of applications for the main engine of vessels, are presented.

1. INTRODUCTION

Engine performance evaluation can be accomplished by comparison of monitored data to some reference. However, the monitored data are not always reliable (e.g. due to sensor or monitoring system malfunctions, as well as human errors in recording and reporting) and the available reference data are often not appropriate for comparisons due to the fact that these reference data correspond to operating conditions - shop tests and/or sea trials - different than those reflected in the “service reports” and any correction may introduce further errors.

A procedure for engine performance evaluation was developed, involving the use of process models to produce reference data, which can be reliably compared with the measured (observed) ones, as both refer to the same operating conditions.

The developed procedure uses detailed engine thermodynamic simulations and can be applied to any ship, any engine using any fuel, independently of the existing shipboard monitoring system. The engine performance is evaluated by comparisons of measured (observed) data to simulation predictions (expected). If significant differences are discovered, these are further analyzed in order to monitor the emergence of possible components degradation.

Το πληρες άρθρο είναι διαθέσιμο μόνο για τα μέλη ΕΛ.Ι.Ν.Τ.
Αν είστε μέλος παρακαλούμε συνδεθείτε με τον κωδικό σας.
Για να γίνετε μέλος ΕΛ.Ι.Ν.Τ. ακολουθήστε τις οδηγίες στις Εγγραφές Μελών
Τετάρτη, 24 Απριλίου 2013

TRAINING WORKSHOP, ΠΟΥ ΟΡΓΑΝΩΘΗΚΕ ΑΠΟ «ΕΛΙΝΤ» / «MAR.TEC.M.A.» / «Ε.Ε.Δ.Ε.» ΣΤΙΣ 19 & 20 ΑΠΡΙΛΙΟΥ 2013, ΣΤΑ ΠΛΑΙΣΙΑ ΤΩΝ ΕΚΔΗΛΩΣΕΩΝ:
«ΗΦΑΙΣΤΟΣ 2013» / ΑΘΗΝΑ & «HE.M.E.EXPO. 2013» / ΣΑΓΚΑΗ

Σε συνέχεια της προηγούμενης – ενημερωτικής εσπερίδας που οργανώθηκε

Περισσότερα...
Παρασκευή, 25 Νοεμβρίου 2016

Το καθιερωμένο βραβείο ΕΛ.Ι.Ν.Τ απονεμήθηκε φέτος κατά τη διάρκεια του Επίσημου Δείπνου στο Ναυτικό Όμιλος Ελλάδος στον κ. Αθανάσιο Μαρτίνο για τη μεγάλη του προσφορά στο ναυτιλιακό χώρο αλλά και για το σημαντικό κοινωνικό έργο.

Περισσότερα...
Παρασκευή, 02 Μαΐου 2014

ΗΜΕΡΙΔΑ ΕΠΑΓΓΕΛΜΑΤΙΚΟΥ ΠΡΟΣΑΝΑΤΟΛΙΣΜΟΥ ΤΩΝ ΜΑΘΗΤΩΝ TOY 9ου ΕΠΑΓΓΕΛΜΑΤΙΚΟΥ ΛΥΚΕΙΟΥ ΠΕΙΡΑΙΑ – ΝΑΥΤΙΚΗΣ & ΝΑΥΤΙΛΙΑΚΗΣ ΚΑΤΕΥΘΥΝΣΗΣ

Γίνεται γνωστό ότι την Τρίτη 08/04/2014 με πρωτοβουλία του «Ελληνικού Ινστιτούτου Ναυτικής Τεχνολογίας» πραγματοποιήθηκε

Περισσότερα...
Δευτέρα, 08 Απριλίου 2013

ΕΣΠΕΡΙΔΑ – “HEPHAESTUS 2013” ΤΗΝ ΠΑΡΑΣΚΕΥΗ 29/03/2013

Πραγματοποιήθηκε με πολύ μεγάλη επιτυχία η πρώτη προγραμματισμένη ενημερωτική εκδήλωση του forum «Ήφαιστος 2013» την Παρασκευή 29/03/2013 στις εγκαταστάσεις της «Environmental Protection Engineering» – E.P.E. S.A. Περισσότερα...