News

Sept 22, 2021

Research presented at OCEANS’21 Conference

Some of the latest results on the design and testing of the control system for Platform for Expanding AUV exploRation to Longer ranges (PEARL), an integrated autonomous floating servicing station that utilizes renewable energy to simultaneously provide AUV battery recharging and data uplink via new generation high-bandwidth low-Earth orbit satellite constellations, were presented at the OCEANS’21 conference. The paper entitled ‘Autonomous Control of a Prototype Solar-powered Offshore AUV Servicing Platform’ is available for discussed the implementation of a low- cost autonomous control system consisting of off-the-shelf hardware components, built around an embedded Raspberry Pi microcomputer and Arduino microcontroller. The open-source MOOS-IvP marine robotics software was used to achieve autonomous operations, consisting of station-keeping and waypoint missions. You can download the paper from the conference website.

Aug 12, 2021

Research presented at the MIT A + B Applied Energy Symposium

Prof. Haji presented work on the ‘Optimization of a symbiotic wind-wave-storage farm for cost and load matching’ at the 2021 MIT A + B Applied Energy Symposium. Her presentation discussed how wave energy converters coupled with offshore wind turbines could not only reduce fatigue stress on the overall structure, but also could reduce the need for energy storage for offshore farms, ultimately lowering costs. In this work, it was shown that as renewable energy penetration levels increase, the optimal storage energy capacity required to minimize curtailed power increases on the order of 5 hours, 40 hours, and 150 hours for renewable energy penetration levels of 50%, 75%, and 100% respectively. View a recording of her presentation.

 

Apr 28, 2021

IEEE Seminar on Connecting the Oceans to Space

Prof. Haji presented some of the work she has been doing on the Platform for Expanding AUV exploRation to Longer ranges (PEARL), an integrated autonomous floating servicing station that utilizes renewable energy to simultaneously provide AUV battery recharging and data uplink via new generation high-bandwidth low-Earth orbit satellite constellations, at the IEEE Geoscience and Remote Sensing Society.

Mar 12, 2021

Ezra’s Round Table Systems Seminar on Mineral Extraction

Prof. Haji presented some of the ongoing work in the SEA Lab on designing symbiotic systems for passive seawater mineral extraction at the Ezra’s Round Table Systems Seminar. This presentation discussed how chemical adsorbents can be used to passively extract minerals from seawater. Symbiotic systems that integrate a mineral harvester with an existing offshore wind turbine have been shown to increase efficiency, reduce environmental impact, and decrease mineral production cost. This talk described the foregoing, and also present some promising initial work applying these design tools to minerals that are key to large-scale lithium-ion battery production, such as cobalt and lithium. The talk was recorded and is available to watch on the Cornell Systems Engineering YouTube page.

Dec 31, 2020

Matthew Haefner recieves the MEng degree. Congratulations!

Matthew Haefner successfully completed all the requirements for the MEng degree in Mechanical Engineering and graduated from the program in December 2020. Congratulations Matthew! In the SEA Lab, Matthew has been working on systems optimization of Integrated Pumped Hydro and Reverse Osmosis Systems (IPHROS) and is currently preparing a manuscript for publication on his work. In addition to his work in the SEA Lab, Matt has been working with Prof. Avedisian and has co-authored two papers on biofuel droplet combustion.

Dec 9, 2020

Prof. Haji selected as a Poster Presenter at the C3E 2020 Symposium

Prof. Haji was selected as a poster presenter at the the U.S. Clean Energy, Education, and Empowerment (C3E) Initiative’s 2020 Symposium. She presented the work she has been doing on the Development of a Platform for Expanding AUV exploRation to Longer ranges (PEARL). Her presentation detailed PEARL, an integrated autonomous floating servicing station that utilizes solar energy to simultaneously provide AUV battery recharging and data uplink via new generation high-bandwidth low-Earth orbit satellite constellations. Specifically, she discussed the how the energy generation and energy storage capabilities of PEARL drive key design decisions, and the renewable energy harvesting and energy management challenges of PEARL. Watch her poster introduction on YouTube.

Oct 15, 2020

Join our group!

The SEA Lab is hiring graduate students and postdocs! Email Prof. Haji (maha@cornell.edu) to learn more and apply. We recruit graduate students from the fields of Mechanical Engineering (deadline to apply: Dec 15, 2020) and Systems Engineering (deadline to apply: January 15, 2021).

Aug 12, 2020

Research presented at the MIT A + B Applied Energy Symposium

Prof. Haji presents work on the ‘Analysis of Integrated Pumped Hydro Reverse Osmosis Systems for Iran (IPHROSI) at the 2020 MIT A + B Applied Energy Symposium. Her presentation discussed how IPHROSI could enable Iran to meet both its energy and freshwater needs through renewable and sustainable technologies. A number of regions throughout Iran were highlighted for their suitability for the development of IPHROSI, finding there existed the potential to store over 25 TWh of renewable energy, more than all of the country’s electricity generation from oil in 2018 (23 TWh). These sites could supply both energy and freshwater to meet the needs of over 500 million people (over five times the projected population of Iran in 2050). View a recording of her presentation.

Feb 21, 2020

Presentation at Ocean Sciences Meeting 2020

Prof. Haji presented recent work on ‘A Framework for the Design of Renewably Powered Offshore AUV Servicing Platforms‘ at the Ocean Sciences Meeting 2020, held in San Diego, CA. The talk detailed a framework for the co-optimization of the design and operation of underwater, surface, and space assets, which enable PEARL to overcome some of the past limitations in AUV servicing platforms. The co-design framework presented included systems for on-board renewable energy generation and satellite data transfer, and can be modified to servicing platforms using ocean renewable energy such as power from waves, tides, currents, or winds. Platforms like PEARL could enable AUVs to provide increased and reliable scientific data key to the sustainable growth of the Nation’s Blue Economy. View the presentation abstract on the conference website.