Multiphase flows under peri-critical conditions in PhD student's research
Michał Pysz, a graduate of the Doctoral School at Gdańsk University of Technology, undertook a study of multiphase flows under peri-critical conditions for his dissertation. Together with his supervisor, Prof. Dariusz Mikielewicz, he conducted observations of the physical phenomenon associated with flow boiling in very thin channels of 1 to 3 mm in diameter. Such flows are found, for instance, in high-temperature heat pump systems and ORC power stations.
Michał Pysz states the objective of the dissertation was to address an existing literature gap on flow boiling in medium and high reduced pressure regions. To achieve this goal, he designed and built a dedicated test rig to study the transfer and resistance of flows in elevated reduced pressure conditions. As part of his research activities, 1,321 experimental points were collected for boiling flow in the vertical channel of R1233zd(E) and 597 experimental points in the horizontal channel of R1234ze(E).
