Wroclaw University of Science and TechnologyBartosz Zajaczkowski, BEng, PhD, DSc, Assoc. Prof.
Faculty of Mechanical and Power Engineering
Department of Thermal Sciences
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About

About

I am a researcher and a lecturer at the Faculty of Mechanical and Power Engineering at Wroclaw University of Science and Technology (WUST). In march 2009 I received my PhD degree with honors by defending a thesis on heat and mass transfer processes in adsorption systems. This gave me the opportunity to work as a post-doctoral research fellow in the United States and in the Netherlands. Currently, I am employed as an Associate Professor in the Department of Thermal Sciences. In September 2020, I was appointed by the Rector of the Wrocław University of Science and Technology to act as the Vice-Dean for General Affairs at the Faculty of Mechanical and Power Engineering.

My research interests include thermal and mechanical processes, particularly in the area of power engineering, environmental engineering and cooling. Currently I focus on three specific research topics: modern refrigeration technologies for integrated co- generation and tri-generation systems (i.e. adsorption refrigeration), low-pressure phase transitions, and implementation of nanoparticles in order to increase physical and thermal capabilities of refrigerants. I specialize in theoretical analyses based on numerical simulations of complex systems (simulations based on lumped parameter differential models described with multiple balance equations).

Keywords: refrigeration, heat pump, adsorption, absorption, refrigerants, trigeneration, thermo-siphon, phase transitions, mathematical modeling, numerical modeling, nanofluids

Formal Qualifications

ławski
  • 09.2018 - D.Sc. in Mechanical Engineering
  • 03.2009 - Ph.D. – Wroclaw University of Science and Technology – obtained with honours. The title of thesis is: “Heat and mass transfer in the reactor of sorption heat pump.” (pol. “Przewodzenie ciepła i masy w reaktorze sorpcyjnej chemicznej pompy ciepła.”)
  • 07.2003 - M.Sc. in Process Engineering

International research/training experience

  • 10.2012 - 12.2012 – Top 500 Innovators Programme at Stanford University, Palo Alto, CA, USA. The aim of this programme was scientific management and commercialization of research. The training involved entrepreneurial/business aspects of R&D projects, as well as effective communication and dissemination of their outcomes to industrial/business partners and general public.
  • 11.2009 - 09.2010 – Postdoctoral researcher at Stirling Cryogenics, Son en Bruegel (n. Eindhoven), the Netherlands. This postdoctoral stay was a part of international FP6-Mobility Marie Curie Research Training Network Project NESPA (NanoEngineered Superconductors for Power Applications). I was assigned to a WP focused on engineering design and numerical analysis of one-stage and two-stage stirling cryocoolers. The research also aimed at evaluating the possible application of such device to stabilize the operating temperature of several kilometers-long high temperature superconducting cables. The numerical analysis of the problem was published in the peer-reviewed journal “Cryogenics”.
  • 08.2009 - 10.2009 – Postdoctoral researcher at San Diego State University, San Diego, CA, USA. This research project aimed at designing a distribution design of the heat transfer fluid in an adsorption system with multiple adsorbent beds. The training included professional course on 3D engineering and modeling with Solid Works 3D design suite.
  • 07.2005 - 08.2005 – Researcher trainee at RICOH Japan, Research and Development Center, Yokohama, Japan. The focus of this assignment was the development of mechanical dry cleaning method for plastic components. This project included design and construction of a test bench, study of the cleaning element deterioration (at macro-, as well as nano-scale using SEM), and implementation of the proven statistical Design of Experiment (DoE) methodology – the Genichi Taguchi Method.
  • 03.2004 - 05.2004 – Researcher trainee at SINTEF Applied Chemistry, Oslo, Norway. This early stage research training focused on the preparation of synthetic adsorbents (various zeolite structures), conduction of flow-through experiments, and determination of breakthrough curves using spectral analysis.

Leader/supervisor of funded research projects

  • 12.2017 - now - Research Supervisor in a research grant PRELUDIUM 13 from the National Science Centre (Poland) for the research of two-phase flow in microchannels. PhD candidate Stanislawa Sandler is the Principal Investigator in this project.
  • 07.2017 - now - Research Supervisor in a research grant PRELUDIUM 12 from the National Science Centre (Poland) for the research of nanofluids. PhD candidate Agnieszka Wlazlak is the Principal Investigator in this project.
  • 2012 - 2018 - Leader of a research project in collaboration with and funded by Fortum Power and heat Poland (adsorption/absorption systems powered with district heating network). The prototype adsorption installation powered with heat from district heating network that has been commissioned early 2017 and is currently in operation at Fortum premises in Wroclaw.
  • 2010 - 2011Leader in a grant from the Ministry of Science and Education of Poland for the research of energy storage based on sorption process and materials (statutory research).

Positions at boards/organizations/commissions

  • 02.2021 - 06.2021 - Member of the Statutory Committee at WUST (ZW 34/2021)
  • 01.2021 - now - Chair of the Department of Thermal Sciences at the Faculty of Mechanical and Power Engineering, WUST.
  • 09.2020 - now - Vice-Dean for General Affairs at the Faculty of Mechanical and Power Engineering, WUST.
  • 05.2020 - 04.2021 – COST Innovators Grant CIG-15119: Nanofluids for convective heat transfer devices – Team member, ITC Conference Grant Coordinator.
  • 01.2020 - 31.12.2020 - Vice-Chair of the Department of Thermal Sciences at the Faculty of Mechanical and Power Engineering, WUST.
  • 05.2019 - now - The member of the WUST Doctoral School Recruitment Committee for the discipline of environmental engineering, mining and energetics (ZW 40/2019).
  • 11.2018 - 08.2020 – The chairman of the program committee for energy studies at the Faculty of Mechanical and Power Engineering.
  • 07.2018 - now – Registered and active reviewer at NAWA (National Agency for Academic Exchange).
  • 03.2017 - now – The Chairman of Technical Committee #5 (refrigeration technologies) at PKN (Polish Normalization Committee).
  • 03.2017 - nowCOST Action CA16144 RESTORE – Management Committee member, CORE Group member, Science Communication Officer, Member of WG0 (management) and WG1.
  • 10.2016 - 03.2020COST Action CA15119 NANOUPTAKE – Management Committee member (substitute), member of WG4 (Boiling and Solar), ITC Conference Grant Coordinator.
  • 08.2016 – now – Member of International Institute of Refrigeration, an intergovernmental agency devoted to the widespread of refrigeration science and technology.
  • 5.2016 - now – Voting member of Technical Committee #5 (refrigeration technologies) at PKN (Polish Normalization Committee). This responsibility includes studying, reviewing, editing, and formally voting on EU and Polish norm and standardization documents on a wide range of refrigeration technology.
  • 04.2016 – 08.2020 – Member of the project group created at WUST for conceptualization and coordination of international science and research cooperation at WUST.
  • 01.2014 – 12.2014 – Representative of WUST in the Industrial Liaison Program (ILP) of the Massachusetts Institute of Technology.
  • 03.2013 - now – Registered and active reviewer at NCBR (National Centre for Research and Development) – one of the most important grant funding organization in Poland. Review of several applications each year + participation in evaluation committees if necessary.
  • 09.2013 - 06.2014 – Member of a project group “Interdisciplinary Learning Path” established to prepare the implementation of interdisciplinary learning policies at WUST. The innovative aspect of this project was to build methodology and regulation that would encourage and support close master- student relationships in modern studying environment (ZW 75/2013).
  • 06.2013 - 05.2018 – Member of Audit Committee of the Top 500 Innovators Alumni Association.
  • 03.2013 - 03.2014 - Steering Committee member in the project “Development of the principles of cooperation with industrial and business partners on the implementation of research, development, and services at the Wroclaw University of Science and Technology”. The outcome of this project is a currently active complex database of projects, laboratories, patents and contacts that allows WUST and its partners (both industrial and academic) to establish collaboration (ZW 28/2013).
  • 01.2013 - 05.2014 – Co-founder and President of the Top 500 Innovators Alumni Association – organization of researches and technology transfer experts that were certified on management and commercialization at Stanford University, University of Berkeley, and University of Cambridge.
  • 2001 - 2008 – IAESTE – International Association for the Exchange of Students for Technical Experience - National Board Member, Audit Committee Member, President of the Local Committee in Wroclaw. In charge of organizing and supporting the process of international exchanges of students. More than 1000 Polish students have been exchanged with almost 80 countries around the world during this period of time.

Scientific and Organizing Committees

  • Scientific Committee Member - 2021 CPSYS - XX Conference of PhD Students and Young Scientists, June 23-25, 2021 (online conference)
  • Scientific Committee Member - XIIth Conference "Young in Energetics", 22-23 June 2020, Wroclaw, Poland (virtual conference)
  • Scientific Committee Member - 2020 CPSYS - XX Conference of PhD Students and Young Scientists, October 14-16, 2020 - Szklarska Poręba, Poland
  • Scientific Committee Member - the 1st International Conference on Nanofluids (ICNf) and the 2nd European Symposium on Nanofluids (ESNf), Castellón, Spain, 26-28 June 2019
  • Organizing Committee Member - Top 500 Innovators Meetup and Polish-American Innovation Bridge, Wroclaw, Poland, 8-10 May 2019

Selected recent peer-reviewed publications/proceedings

  • Dutkowski K., Kruzel M., Zajaczkowski B., Białko B.,The experimental investigation of mPCM slurries density at phase change temperature, International Journal of Heat and Mass Transfer, Volume 159, 2020, https://doi.org/10.1016/j.ijheatmasstransfer.2020.120083.
  • Wojtasik K., Rullière R., Krolicki Z., Zajaczkowski B., Bonjour J., (2019). Subcooled boiling regime map for water at low saturation temperature and subatmospheric pressure, Experimental Thermal and Fluid Science, 2020, https://doi.org/10.1016/j.expthermflusci.2019.02.019.
  • Halon, T., Pelinska-Olko, E., Szyc, M., & Zajaczkowski, B. (2019). Predicting Performance of a District Heat Powered Adsorption Chiller by Means of an Artificial. Energies, 12. https://doi.org/10.3390/en12173328
  • Wojtasik K., Zajaczkowski B., Rullière R., Bonjour J., (2019). Novel sensor for local analysis of bubble dynamics at low pressure, Experimental Thermal and Fluid Science, 104, 175-185, https://doi.org/10.1016/j.expthermflusci.2020.110150.
  • Kujawska A., Zajaczkowski B., Wilde L.M., Buschmann M.H., (2019). Geyser boiling in a thermosyphon with nanofluids and surfactant solution, International Journal of Thermal Sciences, 139,195-216, https://doi.org/10.1016/j.ijthermalsci.2019.02.001.
  • Wlazlak, A., Zajaczkowski, B., Woluntarski, M., & Buschmann, M. H. (2018). Influence of graphene oxide nanofluids and surfactant on thermal behaviour of the thermosyphon. Journal of Thermal Analysis and Calorimetry, 3456789. https://doi.org/10.1007/s10973-018-7632-x
  • Sandler Stanislawa, Zajaczkowski Bartosz, Krolicki Zbigniew (2018). Review on flow boiling of refrigerants R236fa and R245fa in mini and micro channels. International Journal of Heat and Mass Transfer, 126, 591–617
  • Halon Tomasz, Zajaczkowski Bartosz, Michaie Sandra, Rulliere Romuald, Bonjour Jocelyn, Enhanced tunneled surfaces for water pool boiling heat transfer under low pressure, International Journal of Heat and Mass Transfer, 2018, vol. 116, 93-103
  • Sandler Stanislawa, Zajaczkowski Bartosz, Bialko Bogusław, Malecha Ziemowit M: Evaluation of the impact of the thermal shunt effect on the U-pipe ground borehole heat exchanger performance, Geothermics. 2017, nr 65, s. 244-254
  • Halon Tomasz, Zajaczkowski Bartosz, Michaie Sandra, Rulliere Romuald, Bonjour Jocelyn, Experimental study of low pressure pool boiling of water from narrow tunnel surfaces, International Journal of Thermal Sciences, 2017, 121, 348-357
  • Zajaczkowski Bartosz. Optimizing performance of a three-bed adsorption chiller using new cycle time allocation and mass recovery. Applied Thermal Engineering, 2016, vol. 100, p. 744- 752
  • Zajaczkowski Bartosz, Halon Tomasz, Krolicki Zbigniew, Experimental verification of heat transfer coefficient for nucleate boiling at subatmospheric pressure and small heat fluxes. Heat and Mass Transfer. 2016, vol. 52, n° 2, p. 205-215
  • Halon Tomasz, Zajaczkowski Bartosz, Krolicki Zbigniew, Wojtasik Karolina, Calculation and experimental verification of heat transfer coefficient for low pressure methanol evaporator. Proc. 24th IIR International Congress of Refrigeration, ICR 2015, Yokohama, Japan, August 16- 22, 2015
  • Zajaczkowski Bartosz, Performance analysis and cycle time optimization of a single evaporator three-bed solid-sorption refrigeration system driven by low-temperature heat source. Proc. 24th IIR International Congress of Refrigeration, ICR 2015, Yokohama, Japan, August 16-22, 2015
  • Complete list of works including papers, books, student scripts, patents, and project reports is available in searchable database, here...

    Awards

    • In March 2018 I received Marie Sklodowska-Curie Actions Seal of Excellence (MC-IF-2017).
    • In 2010, 2016, 2017 and 2019 I received the Rector’s Award for conducting distinguished activities that promote the recognition of the University.
    • In 2012 I was awarded for organization and active participation in the “Lower Silesia Science Festival”.

    Supervising/teaching/mentoring activities

    Between 2010 and 2020 I successfully advised/mentored over 80 theses (both Bachelor and Master). In 2014, 2015, and 2017 my students won various the “best thesis” awards.

    I co-supervised several PhDs theses:

    • Tomasz Halon, PhD sucessfully defended (with disctintion) his dissertation on low-pressure pool-boiling of natural refrigerants in October 2017.
    • Agnieszka Kujawska, PhD sucessfully defended (with disctintion) her dissertation on heat transfer processes in thermosyphon employing nanofluids in March 2020.
    I currently supervise ongoing PhD tracks:
    • Karolina Wojtasik graduated in June 2016 (as the best of the year) and currently undergoing her PhD studies on low-pressure phase transitions. She is following the intenational Polish-French co-tutelle PhD track, and her French supervisor is Prof. Jocelyn Bonjour, INSA-CETHIL, Lyon, France.
    • Wiktoria Lada graduated in June 2020 (as the best of the year) and currently undergoing her PhD studies on low-pressure droplet evaporation.
    • Robert Mulka graduated in June 2020 (as the best of the year) and currently undergoing his PhD studies on nanofluids in thermal systems.

    Agnieszka Kujawska and Karolina Wojtasik were awarded with prestigious Rector’s scholarship for the best PhD candidates in 2015 and 2016.