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Seamus O'Shaughnessy
Ussher Assistant Professor, Mechanical & Manuf. Eng

Biography

I am a Mechanical Engineer with over 11 years research experience in the field of fluid mechanics and heat transfer. I graduated with first class honours from the Dept. of Mechanical & Manufacturing Engineering in Trinity College Dublin in 2006 before pursuing a PhD, during which I studied a form of natural convection termed thermocapillary or Marangoni convection. I used a combination of analytical, numerical, experimental and computational techniques to validate my research findings, which have been published in several peer-reviewed journals. In 2010 I was appointed to the role of Research Fellow in TCD, and since then I have been working on a variety of research projects, many of which involve collaborations with industry partners. Currently I am working with a multinational partner to investigate novel methods of cooling biomedical grade polymers during machining processes. Since 2011, my main research focus has been on sustainable international development. Our research team is involved in a project in Malawi which aims to bring off-grid electricity to those in the developing world by using the waste heat produced during cooking. Termed the muPower TEG-Stove, this research is in its 6th year and growing, with 100 prototype electricity-producing cooking stoves undergoing field trials in 2016. In September 2016 I began my role as Ussher Assistant Professor in Energy & Sustainable International Development. I am currently working towards establishing new projects in this field in countries such as Benin, Burkina Faso and Zambia.

Publications and Further Research Outputs

Peer-Reviewed Publications

A. Mooney, S.M. O'Shaughnessy, A Computational Fluid Dynamics (CFD) Investigation of Natural Convection from a Triangular Array of Isothermal Horizontal Cylinders, 34th International Manufacturing Conference, Insitute of Technology Sligo, Ireland, 30th August 2017, 2017 Conference Paper, 2017

M.J. Deasy, M.E. O'Regan-Murphy, A.J. Robinson, S. M. O'Shaughnessy*, Charging Low Power Consumer Products with Thermoelectric Generators, Applied Energy, 2017 Journal Article, 2017

M.J. Deasy, N. Baudin, S. M. O'Shaughnessy, A.J. Robinson, Simulation-Driven Design of a Passive Liquid Cooling System for a Thermoelectric Generator, Applied Energy, 205, 2017, p499 - 510 Journal Article, 2017 URL DOI TARA - Full Text

G. Byrne, S.M. O'Shaughnessy, Performance Characteristics and Exhaust Gas Analysis of a Diesel Engine using Biodiesel Fuel Blends, Biofuels, 2017 Journal Article, 2017 URL DOI

A. Sloane, A. Kearns, G. Byrne, D. Trimble, S. M. O'Shaughnessy*, G. E. O'Donnell, Design, characterisation and preliminary performance evaluation of a Peltier-driven cryo-adhesive fixture for manufacturing operations , Materials & Design, 2017 Journal Article, 2017

M.J. Deasy, S. M. O'Shaughnessy*, L. Archer, A.J. Robinson, Thermoelectric Power Generation from a Biomass Cookstove with MPPT Power Management and Passive Liquid Cooling, Energy for Sustainable Development, 2017 Journal Article, 2017

K.J. Brown, R. Farrelly, S.M. O'Shaughnessy, A.J. Robinson, Energy Efficiency of Electrical Infrared Heating Elements, Applied Energy, 162, 2016, p581 - 588 Journal Article, 2016 URL DOI TARA - Full Text

Seamus M O'Shaughnessy, Maurice Deasy; Vincent Doyle; Anthony Robinson, Performance analysis of a prototype small scale electricity-producing biomass cooking stove, Applied Energy, 156, 2015, p566 - 576 Journal Article, 2015 DOI TARA - Full Text URL

S. M. O'Shaughnessy, M.J. Deasy, V. Doyle, A.J. Robinson, Adaptive Design of a Prototype Electricity-Producing Biomass Cooking Stove, Energy for Sustainable Development , 28, 2015, p41 - 51 Journal Article, 2015 URL DOI TARA - Full Text

S. M. O'Shaughnessy, M.J. Deasy, J.V. Doyle, A.J. Robinson , Field Trial Testing of an Electricity-Producing Portable Biomass Cooking Stove in Rural Malawi, Energy for Sustainable Development, 20, (1), 2014, p1 - 10 Journal Article, 2014 DOI URL TARA - Full Text

C.E. Kinsella, S.M. O'Shaughnessy, M.J. Deasy, M. Duffy, A.J. Robinson, Battery Charging Considerations in Small Scale Electricity Generation from a Thermoelectric Module, Applied Energy, 114, 2014, p80 - 90 Journal Article, 2014 DOI TARA - Full Text URL

S.M. O'Shaughnessy, A.J. Robinson, Convective heat transfer due to thermal Marangoni flow about two bubbles on a heated wall, International Journal of Thermal Sciences, 78, 2014, p101 - 110 Journal Article, 2014 TARA - Full Text URL DOI

S.M. O'Shaughnessy, A.J. Robinson, Heat Transfer near an isolated gas bubble: The Combined Influence of Thermocapillarity and Buoyancy, International Journal of Heat & Mass Transfer, 62, 2013, p422 - 434 Journal Article, 2013 URL TARA - Full Text DOI

S.M. O'Shaughnessy, M. Deasy, C. Kinsella, V. Doyle, A.J. Robinson, Small Scale Electricity Generation from a Portable Biomass Cookstove: Prototype Design and Preliminary Results, Applied Energy, 102, (0), 2013, p374 - 385 Journal Article, 2013 DOI URL TARA - Full Text

Seamus M O'Shaughnessy, Anthony Robinson, The μPower Stove Generator, National Research Dissemination Conference, Lilongwe, Malawi, 16/05/12, 2012 Conference Paper, 2012

O'Shaughnessy, S.M., Robinson, A.J., The Influence of the Magnitude of Gravitational Acceleration on the Marangoni Convection about an Isolated Bubble under a Heated Wall, Heat Transfer Engineering, 30, (13), 2009, p1096 - 1107 Journal Article, 2009 URL TARA - Full Text DOI

S. M. O'Shaughnessy, A. J. Robinson, Numerical investigation of bubble-induced marangoni convection, Interdisciplinary Transport Phenomena: Ann. N.Y. Acad. Sci, 1161, 2009, p304 - 320 Journal Article, 2009 URL TARA - Full Text DOI

O'Shaughnessy, S.M., Robinson, A.J., Numerical Investigation of Marangoni Convection around a Bubble, ICHMT International Symposium on Advances in Computational Heat Transfer, Marrakech, Morocco, May 11-16, 2008, 2008 Conference Paper, 2008

O'Shaughnessy, S.M., Robinson, A.J., Numerical Investigation of Bubble Induced Marangoni Convection: Some Aspects of Bubble Geometry, Microgravity Science and Technology, 20, (3-4), 2008, p319 - 325 Journal Article, 2008 DOI TARA - Full Text URL

Seamus M. O'Shaughnessy, Anthony J. Robinson, Numerical Investigation of Bubble Induced Marangoni Convection: Influence of Bubble Size and Shape, Third International Topical Team Workshop on Two-Phase Systems for Ground and Space Applications, Brussels, Belgium, September 10-12, 2008 Conference Paper, 2008

Non-Peer-Reviewed Publications

Engineers Ireland, TCD/Irish Aid project looking to shine some light in the developing world, 2015, - Miscellaneous, 2015

BBC World News, This is how to charge your phone with a mud oven, 2015, - Miscellaneous, 2015 URL

Irish times, Irish invention is giving people in Malawi the power they need, 2015, - Miscellaneous, 2015 URL

Sunday Business Post, TCD generator brings electricity to Malawi's poor, 2013, - Miscellaneous, 2013

Seamus M O'Shaughnessy, Off Grid Electricity for the Developing World, TCD Research Showcase 2011, Trinity College Dublin, 2011 Oral Presentation, 2011

Seamus M O'Shaughnessy, Anthony Robinson, Bubble Induced Marangoni Convection, Sir Bernard Crossland Symposium, University of Limerick, Ireland, 2008 Poster, 2008

Research Expertise

Projects

  • Title
    • The Wanrou Stove Gemerator
  • Summary
    • An investigation into electricity generation, using thermoelectric generators, from stoves locally made in parts of Benin. The TEGs are cooled using completely passive means, relying only on natural convection. The TEGs are integrated into stoves that are part of a large scale carbon credit financing project. This project involves both private partners and investors, as well as local NGOs in Benin. The project began in April 2017 and field trials of the technology are expected in late 2017.
  • Funding Agency
    • Private
  • Date From
    • 01/04/17
  • Title
    • The mPower Stove Generator
  • Summary
    • Approximately 2.5 billion people burn biomass as a primary energy source and this number is expected to grow to 5 billion by 2050. Half of those who burn biomass lack access to grid electricity. This study details the devel-opment of a prototype stove with integrated thermoelectric generator (TEG). A single thermoelectric module is utilised to convert a small portion of heat to electricity. The electricity produced is used to charge a single 3.3 Volt Li-ion battery and drive a low power fan, as well as some other auxiliary features. From experiments conducted using wood as a fuel source, a maximum TEG power output of 5.9W has been obtained. Over the course of three one hour-long experiments, 9Whrs of power was stored in the battery. Furthermore, the cooking performance of the stove has not been negatively impacted. Field trials have taken place in Malawi, Africa in Dec 2011 and July 2012.
  • Funding Agency
    • ICRSET & INTEL Enterprise Partnership, Irish aid
  • Date From
    • January 2011
  • Date To
    • ongoing
  • Title
    • Cryo-milling of biomedical grade polymers
  • Summary
    • This project is ongoing and currently funded by a large private industrial partner in collaboration with the Advanced Materials and Bio-Engineering Research centre (AMBER). Involves the investigation of novel methods for cooling polymer components undergoing manufacturing processes such as milling. The project has direct application in industry, with the project partner looking to implement a successful design into their production line immediately. Key responsibilities include CAD design, analytic and numerical modelling, experimentation and data acquisition, budget management, report generation and liaising with the industrial partner.
  • Funding Agency
    • Science Foundation Ireland
  • Date From
    • July 2015
  • Date To
    • ongoing
  • Title
    • Solid State Thermal Interface Material
  • Summary
    • . Funded by Science Foundation Ireland and in conjunction with the Centre for Research on Adaptive Nanostructures and Nano-devices (CRANN). . This project involves the design and testing of novel solid state thermal interfaces. Key responsibilities include experimental rig design and construction, LabVIEW instrument control and data acquisition, and data analysis.
  • Funding Agency
    • Science Foundation Ireland
  • Date From
    • March 2014
  • Date To
    • ongoing
  • Title
    • Valve Feasibility Study
  • Summary
    • Funded by the Schuf Group and under the supervision of Dr Craig Meskell, this project involved the use of ANSYS CFX to quantify the effects of sudden valve closure on the properties of a multiphase fluid flowing through an oil pipeline.
  • Funding Agency
    • Schuf Group
  • Date From
    • March 2013
  • Date To
    • June 2013
  • Title
    • Thermal Cycling of Insulated Gate Bipolar Transistors (IGBTs)
  • Summary
    • The study was conducted for a multinational electronics company. The IGBTs were subjected to an accelerated lifetime test of 50,000 cycles, each cycle comprising approximately two minute long heating and cooling periods with large electrical currents and thermal gradients imposed. Key responsibilities included project management, experimental rig design and construction, extensive LabVIEW instrument control and data acquisition, data analysis and reporting to the industrial partner.
  • Funding Agency
    • Private
  • Date From
    • June 2012
  • Date To
    • November 2013
  • Title
    • Long-term Extreme Condition Storage of Insulated Gate Bipolar Transistors (IGBTs)
  • Summary
    • The effects of long-term storage of the IGBTs at high temperature, high humidity, and a combination of high temperature and humidity were investigated. Key responsibilities included the design and construction of a special pressurised chamber to achieve the required conditions, high-voltage/current experimentation and data analysis.
  • Funding Agency
    • Private
  • Date From
    • June 2012
  • Date To
    • November 2013
  • Title
    • Investigation of Bubble Induced Marangoni Convection
  • Summary
    • Thermal Marangoni convection about a 1mm radius air bubble situated under a heated wall of constant temperature immersed in a silicone oil layer (Pr = 220) of constant depth 5mm was experimentally investigated using a flow imaging technique known as particle image velocimetry, or PIV. The response to increasing temperature gradient and Marangoni numbers in the range 145≤Ma≤363 was investigated. For all experiments, steady-state convection was observed and primary, thermocapillary-driven vortices were seen to develop on both sides of the bubble, along with a jet-like flow of liquid from the bubble tip. Beneath these primary flow structures, secondary, slower-moving vortices were also observed, and these buoyancy-driven vortices rotated in opposite direction to the primaries. The results of the experiments were compared with numerical simulations and good agreement was observed. Two-dimensional axisymmetric simulations were conducted to investigate the influence of Marangoni number, Prandtl number and the magnitude of gravitational acceleration on the flow and temperature fields and ultimately their influence on local heat transfer. Simulations were carried out for Marangoni numbers in the range 0≤Ma≤915 under zero-gravity conditions. It was determined that the enhanced heat transfer penetrated a distance of approximately seven bubble radii along the hot wall, and four bubble radii along the cold wall. For the range of Marangoni numbers tested, a 20% improvement in the average heat transfer in the vicinity of the bubble has been calculated for the hot wall, and up to 90% for the cold wall. For a Marangoni number of Ma = 915, increasing the gravity level above a certain magnitude caused the formation of secondary vortices and a reduction in the effective radius and area of enhancement. Maximum enhancement occurred under zero-gravity conditions. The gravity level was also varied at different Marangoni numbers in the range 0≤Ma≤915. It was determined that at low temperature gradients and therefore low Ma, increasing the gravity level actually increased heat transfer, which contrasted the behaviour at higher values of Ma. It was postulated that when the Marangoni number was increased in the presence of gravity, the primary vortices lost some mechanical energy to the secondary vortices. The influence of Prandtl number was also investigated. It had been suggested by some authors that an inverse relationship between heat transfer enhancement and Prandtl number existed, but following the dimensionless solution obtained in this study, it has been concluded that the Prandtl number has little to no effect on the heat transfer. Three-dimensional numerical grids were constructed which included a second bubble. The spacing between the two bubbles was varied between simulations to analyse the influence of the separation distance between them. For zero gravity conditions, it was determined that the local wall heat flux was greatest for the smallest separation of three bubble radii, but that the increase in heat transfer over the whole domain was greatest for a separation of ten bubble radii. When the effects of gravity were included in the model, the behaviour was observed to change between the cases. At large separations between the bubbles, increasing the gravity level was found to decrease the local wall heat flux, which was consistent with much of the two-dimensional work. At small separations however, the increase in gravity led to an increase in the local wall heat flux, which was caused by a buoyancy-driven flow formed by the interaction of secondary vortices.
  • Funding Agency
    • IRCSET
  • Date From
    • October 2006
  • Date To
    • October 2010
  • Title
    • Thermal Cycling of Thermoelectric Generators (TEGs)
  • Summary
    • Thermoelectric generators, or TEGs, are solid state devices that convert heat (temperature differences) directly into electrical energy through a phenomenon called the Seebeck effect. TEGs have recently been used in a variety of waste heat recovery applications, including with cooking stoves used in the developing world. For applications involving relatively steady-state conditions, thermoelectric module reliability is extremely high. However, thermal shocks and temperatures much higher than the desired operating range could cause structural failure of the thermoelectric elements. This limitation is a significant difficulty when designing a system for transferring waste heat from cooking stoves to thermoelectric elements, since temperatures may vary widely and frequently. The aim of this research study is to quantify the effects of thermal cycling on commercially available TEG modules.
  • Date From
    • September 2016
  • Title
    • Development of a low-cost PV cell solar tracker for use in developing countries
  • Summary
    • Solar photovoltaic (PV) has been suggested as a means of mitigating the energy access problem in developing countries, but there are many obstacles to overcome before this becomes a reality. This research project aims to address the issue at a domestic household level by developing a low cost solar tracker for use with very small scale PV panel installations. A solar tracker is a device that orients a payload (such as a lens, mirror or solar panel) toward the sun. For flat-panel PV systems, trackers are used to minimize the angle of incidence between the incoming sunlight and a photovoltaic panel. This increases the amount of energy produced from a fixed amount of installed power generating capacity.
  • Date From
    • September 2016
  • Title
    • The Ice Clamp
  • Summary
    • Workholding and fixturing is a critically important aspect of manufacturing that has direct implications for the quality of the manufactured component during processing as well as a direct impact on the cost of the component. The field of workholding is mature with numerous techniques employed, mostly using contact pressure, but also using magnetics and adhesives. Looking to nature for inspiration presents us with the use of ice as a mechanism for adhesion, referred to as cryo-adhesion. Cryo-adhesion offers some advantages over more traditional fixturing methods such as removing contact pressure and therefore reducing the dependence on the machining of complex, intricate bespoke fixtures. While the concept of ice adhesion is known, there is minimal research presented on the application of ice adhesion in manufacturing processes. This research reports on the development of a novel Peltier-based cryo-cooling fixture for workholding in manufacturing operations. The research provides insight into the main interactions that might be experienced in manufacturing type scenarios and presents preliminary findings on the cryo fixture's thermal and geometric characteristics, the use of the novel cryo fixture for holding various materials under tensile and shear loads, as well as a consideration of contact area and surface roughness on the cryo fixture performance.
  • Date To
    • ongoing

Keywords

Applied thermodynamics and energy; BIOMASS ENERGY; Combined Heat and Power Systems; Computer aided engineering; Control Engineering; convective heat transfer; COOLING; Cooling of Manufacturing Processes; Design Engineering; Direct Energy Conversion; Electronic circuit design; Electronic Cooling Techniques; Electronics Cooling; Emission; Energy and Climate Change; Energy from biomass (see Forestry also); Energy from waste; Energy management system; Energy/Environmental Studies--Developing Coun; Environmental engineering; EVAPORATIVE COOLING; FLUID MECHANICS; Fluids and Heat Transfer; HEAT TRANSFER; Industrial Engineering; INFRARED, GENERAL; Integration of Renewable Energy Systems; International development; JET IMPINGEMENT HEAT TRANSFER; Manufacturing engineering; Renewable energies; Software Engineering; SOLAR ENERGY; Solar, Thermoelectric Conversion; Sustainable Development; Telecommunication Engineering; THERMAL ENERGY; Thermal Engineering; Thermoelectric Generators; THERMOELECTRIC-POWER; Thermoelectricity; TRANSIENT AND UNSTEADY HEAT TRANSFER; Two-phase Flow and Heat Transfer; WATER-IMMERSION COOLING

Recognition

Awards and Honours

Irish Research Council & Intel Corporation Postdoctoral Enterprise Partnership Scholarship 2011

1st Prize, Poster Presentation, Sir Bernard Crossland Symposium, University of Limerick 2008

Irish Research Council (formerly IRCSET) Embark Postgraduate Research Scholarship 2006