Experimental evaluation of advanced features of a modern heat pumping system
Background
The demand in the future on heat pumping systems is to be more environmentally friendly by using natural refrigerants and becoming more energy efficient. One of the key natural refrigerants used in many refrigeration and heat pumping applications today is CO2, the great interest in CO2 led to rapid development on system solution, components, and control strategies.
Extensive research work has been done studying the features of the modern CO2 systems at KTH in the past two decades; however, the last experimental work done in this area at KTH was more than 10 years ago, all the research work done in the past years have been based on modelling and field measurement analysis, where the researchers can only monitor the systems but not change the operating parameters.
There is a need to experimentally investigate almost every feature of the modern CO2 system to refine and verify their performance, also there is greater need to investigate new features that can further improve the efficiency. Therefore, two systems have been built recently in our laboratory with some of the latest energy efficiency features of a CO2 system, so they will be experimentally evaluated. The systems have been commissioned and now ready for testing.
The main objective in this project is to experimentally evaluate features to maximize the energy efficiency of CO2 vapor compression systems and provide very much needed scientifically verified answers to the refrigeration and heal pump industry.
The features that will be investigated in this project are heat recovery and different techniques to overfeed the evaporator, focusing on liquid ejector.
Time schedule
The project starts in January or February 2024. The expected thesis period is 5 months. At start of the thesis work the student is expected to submit a detailed work plan and preliminary layout of the thesis report.
No intermediate reports are required; however, the student is encouraged to write the report in parallel to conducting the research.
Supervisors
