You are here: Home / Facilities / Hybrid Integrated Propulsion POwertrain (HIPPO-2) Τest-bed

Hybrid Integrated Propulsion POwertrain (HIPPO-2) Τest-bed

The Hybrid Integrated Propulsion Powertrain 2 (HIPPO-2) test-bed, seen below in Fig.1, consists of a 261 kW diesel engine connected to a 315 kW electric dynamometer (Brake). A 90 kW electric Motor/Generator, is attached at the free end of the dynamometer.

Fig. 1: The hybrid diesel-electric test-bed HIPPO-2 at LME.

The prime mover is a CATERPILLAR 6-cylinder, 9.3-liter diesel engine, with a rated power output of 261 kW at 1800-2200 rpm. The diesel engine is fitted with state of the art emission reduction technologies, an Exhaust Gas Recirculation (EGR) and a Selective Catalytic Reactor (SCR) NOx abatement systems. The electric motor/generator is a AC asynchronous-induction 3-phase motor, with a rated power of 90 kW. A frequency inverter unit enables the torque output regulation of the electric motor under closed loop control. The mechanical load is applied to the system through the electric dynamometer, which is a 315 kW AC asynchronous-induction 3-phase motor. In this setup, the thermal and electric engine provide mechanical power simultaneously, with identical rotational speeds. All the machines of the HIPPO-2 system can be operated either in torque- or speed-control mode.

The performance monitoring and evaluation of the hybrid system is performed with the various sensors that are installed in the testbed, as shown in Fig. 2. The whole testbed is controlled and monitored by a dSPACE MicroAutobox II controller board, programmed in the MATLAB/Simulink environment.

Fig. 2: Sensors, rapid prototyping and operator interface of LME/NTUA experimental facilities

During experimental testing various loading profiles can be applied. The mechanical load, applied by the dynamometer can simulate for example the vessel's propeller demand, with variable speed and torque, or a generator's loading profile with changing load at constant speed.

In low-speed operation and transient loading, the internal combustion engine has higher fuel consumption and produces higher emissions. During hybrid operation, the electric motor can assist the diesel engine, so as to meet up with the torque demand in a more optimum way.

In HIPPO-2 hybrid diesel-electric test-bed, various control methods are investigated in relation to the power split strategies, including optimal and predictive control methods. The control concept of the powertrain is presented in Fig. 3

Fig. 3: Control system allocation in HIPPO-2 system.

Reference: N. Planakis, G. Papalambrou, N. Kyrtatos. “A Power-Split Strategy for Hybrid Diesel-electric Marine Power Plants”, 2018 Annual Meeting of Marine Technology, Piraeus, Greece, 12/2018.

Video Παρουσίασης Εργαστηρίου Ναυτικής Μηχανολογίας-ΕΜΠ Feb 22, 2021
Eκδήλωση για τα 50 χρόνια από την ίδρυση της Σχολής Ναυπηγών Μηχανολόγων Μηχανικών του ΕΜΠ. Jan 27, 2020
Εκδήλωση ΣΝΜΜ-ΕΜΠ: Εναλλακτικές Πηγές Ενέργειας στην Ναυτιλία May 07, 2019
Ειδικά Συστήματα Ελέγχου Πλοίου Feb 13, 2019
Προγραμματισμός σε Python & Εφαρμογές στη Ναυτική Μηχανολογία Feb 12, 2019
A light-hearted note on the non-return valve in nature and technology Nov 30, 2017
To ENM/ΕΜΠ στον τύπο May 05, 2017
Το ΕΝΜ/ΕΜΠ στα 10 καλύτερα Εργαστήρια για Μεγάλους κινητήρες στον κόσμο. Apr 04, 2017
In Press: HIPPO-2 Inauguration in "Promitheas" NTUA periodical Mar 10, 2017
HIPPO-2 Inauguration at LME/NTUA, 17/1/2017. Photos & Videos Jan 31, 2017
HIPPO-2 Inauguration, 17/1/2017 Nov 21, 2016
Research in Greece connects the micro and the mega Aug 30, 2016
Marine Propulsion Lifetime Achievement Award Prof Nikolas Kyrtatos May 24, 2016
Innovators honoured by European Marine Engineering Awards Apr 20, 2016
Beyond peak engine efficiency? Apr 20, 2016
Prof Nikolaos Kyrtatos is Marine Propulsion’s Lifetime Achievement Award winner for 2016 Mar 30, 2016
LME Participation in "The Third LRF-NTUA Centre of Excellence Workshop on Ship Total Energy-Emissions-Economy" (+ video) Mar 18, 2016
Video παρουσιάσεων/εξετάσεων Διπλωματικών Εργασιών 2015 Β' Nov 11, 2015
LME Participation in "The Second LRF-NTUA Centre of Excellence Workshop on Ship Total Energy-Emissions-Economy" (+ video) Feb 17, 2015
SEMINAR: Gas 2-Stroke Marine Engine Design and Operation, 22/01/2015 (+ video) Jan 13, 2015