Project

CO2 ejector refrigeration system

Publisher

Supervisor

Location

Greater Copenhagen area

The expansion process in refrigeration systems may theoretically provide work using a liquid to two-phase expander; however, the flashing during expansion complicates the design due to fatigue. Another approach to exploit the possible work (or kinetic energy) during expansion is to use an ejector. The ejector works as the expansion device in the refrigeration system and provides a pressure lift and thus a lower compressor work compared to conventional systems. A flooded type evaporator may also be used thereby increasing the evaporation temperature.

The project aims on evaluating the feasibility of the usage of ejectors, especially related to CO2 refrigeration cycles, in which pressure differences are high between the gas-cooler and evaporator. The project may be either numerical (e.g. 1D modeling or 3D (CFD) simulation of the ejector, or 0D system modeling) or experimental. A small scale CO2 system with an ejector is being build in the lab for testing.


Please contact Martin Ryhl Kærn (pmak@mek.dtu.dk) or Wiebke Brix Markussen (wb@mek.dtu.dk) for further information. According to the personal preferences of the candidate, topic and extend of the work can be adjusted.


Project identifier: MEKTES, MEKTESREF, MEKTESHTF, MEKTESTPF.



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Contact

Company / Organization

DTU Mekanik

Name

Wiebke Brix Markussen

Position

Lektor

Mail

wb@mek.dtu.dk

Supervisor info

BSc in Mechanical Engineering

Supervisor

Wiebke Brix Markussen

Co-supervisors

Martin Ryhl Kærn

Type

Final project, BSc project, MSc thesis

Bachelor of Engineering

Supervisor

Wiebke Brix Markussen

Co-supervisors

Martin Ryhl Kærn

Type

Final project, BSc project, MSc thesis

Maskin

Supervisor

Wiebke Brix Markussen

Co-supervisors

Martin Ryhl Kærn

Type

Final project, BSc project, MSc thesis

MSc in Sustainable Energy

Supervisor

Wiebke Brix Markussen

Co-supervisors

Martin Ryhl Kærn

Type

Final project, BSc project, MSc thesis

MSc in Engineering, Mechanical Engineering

Supervisor

Wiebke Brix Markussen

Co-supervisors

Martin Ryhl Kærn

Type

Final project, BSc project, MSc thesis

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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