About the Centre for Compressor Technology

History and Background

Foundation and Growth

Tracing the Centre’s journey from its inception to becoming a leader in compressor technology research.

Our Team

Pioneers in Compressor Technology

Our team is at the forefront of research and development in compression systems.

Collaborators

Bridging Academia and Industry

Partnering with global industry leaders to solve real-world challenges in energy efficiency.

About Us

Expertise and Capabilities

Key Research Activities

Services Offered

Our Team

Prof Ahmed Kovacevic

Howden/Royal Academy of Engineering Research Chair in Compressor Tech.

Professor Ahmed Kovacevic
Dipl Ing, MSc, PhD, CEng, FREng, FIMechE, FRSA, FANUBiH
Howden/Royal Academy of Engineering Research Chair in Compressor Technology

Professor Ahmed Kovacevic holds prestigious Royal Academy of Engineering Research Chair in Compressor Technology at City St George’s, University of London. His work is dedicated to development of design excellence in academia and industry through research, teaching and collaborating with industry in numerical modelling, analysis and design of positive displacement machines.  He is the director of the Centre for Compressor Technology and chairs International conference on Compressors and their Systems. He is the director of PDM Analysis Ltd, a spin-out company from City which develops and commercialises SCORG.
Professor Kovacevic has authored 11 books and book chapters, more than hundred and fifty referenced journal and conference papers, several patents and industrial reports. He received 13 awards for his work including prestigious IMechE James Clayton Prize 2020 and InstMC Cornish Award 2024. He is Fellow of Royal Academy of Engineering in the UK and Academician of the Academy of Science and Arts of Bosnia and Herzegovina.

A.Kovacevic@city.ac.uk

Prof Nikola Stosic

Chair in Positive Displacement Compressor Technology

Professor Nikola StosicDipl Ing (Mech), MSc(Eng), PhD(Fluid Mechanics), DSc, FREng        Chair in Positive Displacement Compressor Technology

Professor Stosic graduated 1973 in mechanical engineering at the University of Sarajevo and 1976 obtained an MSc at the University of Zagreb followed by a doctorate at the University of Sarajevo 1982. He obtained a title of Doctor of Science at City University London in 2019. He started his engineering career in August 1973 in the Institute for Thermal and Nuclear Engineering of Energoinvest, the Yugoslav enterprise in power and process engineering at that time employing 43,000.  In January 1975 he joined the Faculty of Mechanical Engineering of Sarajevo University. There, as a result of successive promotions in 1982, 1986 and 1990, he became professor of Applied Thermodynamics. He joined City University, London in 1992 which 1995 led to his appointment as Royal Academy of Engineering Professor of Positive Displacement Compressor Technology where he together with Professor Ian K Smith established the Centre for Positive Displacement Compressor Technology. In 2000 he took the Chair in Positive Displacement Compressor Technology at City University London.
 
Professor Stosic’s research interest is in mathematical modeling and computer simulation of thermal and fluid flow processes, including turbulence models, experimental methods for investigating the performance of thermal machinery and systems, application of contemporary procedures in design of positive displacement compressors, boilers, furnaces and pipe networks and Industrial investigations of large scale thermal power plants.
 
Professor Stosic is an acknowledged world authority on screw compressor analysis and design and active consultant to compressor manufacturers in more than 25 countries at all continents, including some of the world’s leading companies. Author and co-author of over 300 refereed journal and conference publications and more than 300 major industrial reports, 12 textbook chapters mainly in compressor design and analysis, 3 textbooks on screw compressors and expanders, a textbook on computers in engineering which ran to 3 impressions in 4 years, and a major text on boilers and furnaces with 3 editions in 5 years and 4 active patents.
 
Awarded the IMechE Bernard Hall Prize 1998 and shared the GRC Best Paper Award 2001, IMechE Thomas Stephen Group Prize 2001 and 2002 ASME Congress Best Paper Award, as well as 2003 the IMechE Process Industry Division Moss prize, 2005 the prestigious Clayton Prize and in 2011 Mond and Moss prizes.
 
Professor Stosic is a Royal Academy of Engineering Fellow and Fellow of Institution of Mechanical Engineers and member of American Society of Mechanical Engineers.
 
Professor Stosic has held academic positions in other universities in countries of former Yugoslavia, as well as in Germany and in England and has taught extensively at both undergraduate and postgraduate level.

n.stosic@city.ac.uk

Prof Ian Smith

Professor Emeritus

Prof Ian Smith
Prof Emeritus

Ian Smith has been a member of the academic staff since 1962 and currently holds the position of Professor of Applied Thermodynamics in the Department of Mechanical Engineering. He received the degree of BSc in Mechanical Engineering at the University of Cape Town, following which he obtained a diploma in Gas Turbine Technology at Imperial College, London, a PhD from the University of London and, more recently, the degree of DSc from City, University of London. Prior to coming to City, he spent three years in the aircraft gas turbine industry.

Since his appointment at City, he pioneered the first MSc course in the Department of Mechanical Engineering and initiated research in the recovery of power from low grade heat sources, which has been his main field of interest and in which he is an acknowledged expert. Resulting from this, he formed the Centre for Positive Displacement Compressor Technology in 1995, together with Professor Nikola Stosic, and this is now recognised as an international centre of excellence in twin screw machines. As a result of his and Nikola Stosic’s work in this area, Heliex Power Ltd, a spin out company was formed to commercialise their work in 2009.

Ian has over 190 publications, including three monographs and nine patents. He has also received 12 professional awards and prizes, including the Institution of Marine Engineers Silver Medal and the highly prestigious James Clayton Prize from the Institution of Mechanical Engineers. He is a fellow of the Royal Academy of Engineering and the Institution of Mechanical Engineers.

i.k.smith@city.ac.uk

Dr Sham Rane

Senior Research Fellow

Sham Rane
Senior Research Fellow

Dr Sham Rane joined the Centre for Compressor Technology in 2011, where he currently works as a Senior Research Fellow. Dr Rane has over 20 years’ experience in the field and focuses on computational modelling. His research addresses areas such dynamic grid-generation techniques for twin-screw machines, fluid–solid coupled models, multiphase flows with heat and mass transfer, flash boiling in geothermal turbines, and oil-injected and water-injected screw compressors. Dr Rane has over 58 technical publications, an h-index of 16 with 791 citations. He has been awarded student paper prizes at Purdue University, USA (2012), and City (2015, 2017) and has received the Donald Julius Groen Prize from the IMechE (2016, 2018). Dr Rane is the chair of the Short Course on CFD in Positive Displacement Machines, a committee member of the International Conference on Compressors and their Systems, and university member of the CERES industrial consortium.

sham.rane@city.ac.uk

Ivona Ivkovic-Kihic

Research Project Officer

Ivona Ivkovic-Kihic
Research Project Coordinator

Ivona Ivkovic-Kihic joined the Centre for Compressor Technology in 2021, where she works as a Research Project Coordinator. She holds both an MSc in Computer Science and a BSc in Business. Ivona is the co-chair of the International Conference on Compressors and their Systems and the administrator of the CERES industrial consortium, where she focuses on fostering collaboration within the field. In her role, she is involved in project administration, marketing, and communicating with stakeholders. Ivona is passionate about establishing strong, ongoing partnerships with both industry and academic bodies. She is currently expanding her knowledge through an MBA program, combining her technical and business expertise to further her career in project management and business strategy.

ivona.ivkovic-kihic@city.ac.uk

Dr Yang Lu

Postdoctoral Research Associate

Yang Lu
Postdoc Research Associate

Yang Lu is a Postdoctoral Research Associate at City, University of London, with expertise in screw machines and vacuum pump technologies. He earned his Ph.D. at City, focusing on grid generation methods and Computational Fluid Dynamics (CFD) for simulating screw machines with large helix angles. His current work involves chamber modeling of twin-screw vacuum pumps, using simulation techniques to optimize performance and efficiency. Yang gained industry experience at Vert Rotors, where he was responsible for designing and analyzing rotor profiles for conical rotary compressors. He led thermodynamic and fluid dynamic simulations and performed experimental investigations into oil injection techniques. His combined academic and industry experience, particularly in CFD and rotor profiling, positions him as an expert in developing innovative solutions for vacuum and compressor technology applications.

yang.lu.8@city.ac.uk

Aleksander Krupa

Research Engineer

Aleksander Krupa
Research Engineer

Aleksander Krupa has been engaged with the Centre for Compressor Technology since 2018, where he currently holds a Research Engineer position. He graduated from the City, University of London with an MEng in Mechanical Engineering. Aleksander’s focus is on machine design, prototyping and instrumentation. In addition, Aleksander contributes to the Formula Student Team, supporting the development of electric powertrains. He is passionate about motorsport technology and additive manufacturing, particularly in aftermarket applications. Aleksander continually seeks opportunities to drive advancements in the field and contribute to impactful engineering projects.

aleksander.krupa.2@city.ac.uk

Dr Matthew Read

Lecturer in Mechanical Engineering

Dr Matthew Read
Lecturer in Mechanical Engineering

Matthew Read is a Lecturer in Mechanical Engineering at City University of London and a member of the Center for Compressor Technology. He recieved the degree of MEng in Aerospace and Aerothermal Engineering from the University of Cambridge, following which he obtained a PhD from Imperial College London. His research interests are in the fields of low temperature power generation, waste heat recovery and compressor and expander technologies. He also has a long standing interest in power-train hybridisation, transmissions and energy storage systems, which was the subject of his Doctoral Thesis.

Hossein Keshtkar

Research Assistant

Hossein Keshtkar
Research Assistant

Hossein Keshtkar holds an MSc in Automotive Engineering from Iran University of Science and Technology, and a BSc in Mechanical Engineering from KNT University of Technology. Since 2022,  Hossein is industrially sponsored PhD student at Brunel, University of London, focusing on hydrogen internal combustion engines (H2ICE). 
In 2023 he joined the Centre for Compressor Technology as a Research Assistant, where he works on experimental investigation of oil injected screw compressors and research on direct drive water-lubricated screw compressors. Hossein’s previous experience is on gas turbine operation and condition monitoring, where he managed multidisciplinary projects and collaborated with both academic and industrial stakeholders. He is passionate about process enhancements and efficiency improvements and strives to contribute to projects that lead to net-zero targets. 
Hossein was a finalist in the 2023 3MT award at Brunel and served on the organizing committee of the 13th International Conference on Compressors and their Systems, where he organised a panel discussion and chaired sessions.


hossein.keshtkar@city.ac.uk

Dr Vahid Hassani

Postdoctoral Research Associate

Dr Vahid Hassani
Raeng/Howden Postdoctoral Research Associate

Dr. Vahid Hassani obtained his PhD in Mechanical Engineering from Nanyang Technological University in 2014, focusing on dynamic modeling and response analysis of piezo-driven mechanisms. Following his PhD, he worked as a research fellow at the Singapore University of Technology and Design from 2016 to 2019, specializing in design for additive manufacturing (DfAM). In 2019, he joined the University of Sunderland, where he led an ERDF Research Project in the Sustainable Advanced Manufacturing (SAM) Cluster, advancing additive manufacturing, robotics, mechatronics, and automation for SMEs. Dr. Hassani also provided a broad engineering supports for the rail-related SMEs in Sheffield city region through his work at the University of Birmingham. He is currently a senior research fellow on the SECRET project at the Centre for Compressor Technology at City St George’s, University of London.

vahid.hassani@city.ac.uk

Neeraj Bikramaditya

PhD Student

Neeraj Bikramaditya
PdH Student

Neeraj Bikramaditya is a PhD student at the Centre for Compressor Technology at City, University of London, where his research focuses on Numerical fluid flow and bi-directional conjugate heat transfer analysis in leakage flows of rotary positivedisplacement machines. His work aims to enhance the understanding of thermal-fluid interactions and improve machine efficiency through advanced simulations. He holds a Master’s degree in Mechanical Engineering from KAIST, South Korea, where his research focused on the numerical simulation of aortic heart valves using fluid-structure interaction (FSI) techniques.
He has professional experience in computational fluid dynamics (CFD), having worked with notable companies such as Nissan Automotive Technology (Japan), Honda (Japan), MAHLE (India), and LG Electronics (South Korea). His current and future research interests include advancing CFD methodologies, leveraging automation through machine learning (ML) and artificial intelligence (AI), and exploring shape optimization techniques. His future research interests include advancing CFD methodologies, leveraging automation through machine learning (ML) and artificial intelligence (AI), and exploring shape optimization techniques.

Neeraj.Bikramaditya@city.ac.uk

Halil Lacevic

PhD Student

Halil Lacevic
PhD Student

Halil is a PhD student specializing in Compressor Technology, with a focus on Internally Geared Screw Machines. He is currently pursuing doctoral studies at the Center for Compressor Technology. With a Master’s degree in electrical engineering from the University of Sarajevo, Halil began his PhD studies in 2022. Since then, he has been actively engaged in pioneering research and innovative projects within the field of Internally Geared Screw Machines.
 
During his studies, he gained experience through various innovative projects related to software engineering and the application of microcontroller solutions in industrial and other applications. In addition, he is interested in researching new technologies for industrial needs, particularly in the fields of Artificial Intelligence (AI), Augmented Reality (AR), and Virtual Reality (VR). He is also regularly involved in teaching at City University in London, where he works as an assistant in the Department of Engineering courses.

halil.lacevic@city.ac.uk  

Adna Peco

PhD Candidate

Adna Peco
PhD Candidate

Adna Peco joined the Centre for Compressor Technology in 2024, where she is enrolled as a MPhil/PhD student. She holds an MSc in Mechanical Engineering majoring in Process Engineering and BSc in Mechanical Engineering majoring in Energy. For her final thesis she worked on a case study on the energy saving potential in hospital buildings in Sarajevo, Bosnia and Herzegovina. Now at the Center, her focus is on sustainable lubrication in oil-injected positive displacement machines. This includes working on the development of new technology that will facilitate new applications for difficult to lubricate systems, and investigation the specific lubricant properties that are needed for carbon neutrality in their production, usage, and their disposal or reusage. This project aims to bridge the knowledge gap by conducting numerical analysis and exploring sustainable lubricants for oil-injected screw compressors, with a focus on promoting carbon-neutral operations and eco-friendly solutions for challenging applications like water vapor compression. The insights gained will support both academia and industry in developing environmentally friendly lubricants and advancing carbon-neutral practices in industrial machines.

Adna.Peco@city.ac.uk

Anderson Leao

PhD Candidate

Anderson Leao
PhD Candidate

Hamid Abbasi

PhD Candidate

Hamid Abbasi
PhD Candidate

 
Hamid Abbasi is a PhD candidate in Mechanical Engineering at the Centre for Compressor Technology, City, University of London, specializing in the design and material optimization of low-viscosity, fluid-lubricated, oil-free screw compressors. He is currently working on a project with Mayekawa, Japan, focusing on water-lubricated twin screw compressors. Hamid holds a Master’s in Advanced Manufacturing Technologies with a focus on thermal spray coatings from the Centre for Materials Technology, Skolkovo Institute of Science and Technology, where his research, in collaboration with O3 Coating Company, explored protective coatings using flame spray, cold spray, and wire arc spray methods with Zn and Al based sacrificial coatings for corrosion protection. He completed his BS Honors from the Preston Institute of Nano Science and Nano Technology, Preston University, Islamabad, where his research, in collaboration with the National Institute of Laser & Optronics (NILOP), focused on the green synthesis of Ag nanoparticles with quercetin coatings for wound healing bandages. His work has been recognized with academic scholarships and multiple awards.

hamid.abbasi@city.ac.uk

Abhishek Kumar

External PhD Student


Abhishek Kumar
CEng MIMechE

Abhishek Kumar is an Assistant Manager at Kirloskar Pneumatic Company Limited, Pune, India, and a PhD candidate at the Centre for Compressor Technology, City St George’s, University of London since 2021. His PhD research focuses on integrating Multi-Stage Screw Compressors with Artificial Intelligence to develop sophisticated modelling tools that optimize compressor performance. At Kirloskar Pneumatic, he leads projects in screw compressor design and development within the R&D department. Abhishek is a Chartered Engineer and an active member of the Institution of Mechanical Engineers (IMechE), serving as an International Professional Review Interviewer and Young Member India Event Coordinator.
He graduated with a Master of Technology in Mechanical Engineering from the Indian Institute of Technology, achieving first-class distinction and merit. His mathematical excellence has been recognized with multiple awards from the Indian Education Board. 

abhishek.kumar.2@city.ac.uk

Anurag Kishan

External PhD Student


Anurag Kishan
Control and Instrument engineer

Anurag Kishan works as an Electrical, Instrument and Control Engineer at Howden Compressors, Screw packaging division. Before starting at job at Howden, Anurag have worked as Electrical and Instrument engineer at EPC company, SEPCO and have done roles from Site construction engineer to Commissioning support engineer in Water treatment plants, Gas oil separation facilities, Combined cycle Power plants. Anurag is currently a member of the Institute of measurement and control and I near future wants to start activities to get Chartered.
Anurag graduated in MSc Applied Instrumentation and Control from Glasgow Caledonian University and is currently undertaking MPhil/PhD with City, University of London. His research focuses on Monitoring and controlling operational clearance for dry rotating positive displacement machines. 

anurag.kishan@city.ac.uk

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