Armin Hafner

Armin Hafner is a Professor in the Department of Energy and Process Engineering at NTNU. His research focuses on clean cooling technologies, refrigeration systems, thermal energy storage, and CO₂-based heat pumps. He has contributed to advancements in natural refrigerant applications, industrial refrigeration optimization, and sustainable energy solutions for maritime, food processing, and commercial sectors.

His work integrates experimental and numerical methods to improve the efficiency of CO₂ systems, absorption-compression hybrids, and thermal storage integration. Notable projects include cold thermal energy storage for supermarkets, freeze concentration of fish hydrolysates, and refrigeration systems for fish processing in India.

Publications emphasize energy-efficient refrigeration cycles, novel ejector technologies, and the application of CO₂ in diverse climates. Collaborations span institutions globally, addressing challenges in high-temperature heat pumps and cryogenic cooling for CERN detectors.

Academic advising includes numerous master's theses on topics like fossil-free heating systems, CO₂ plate freezers, and refrigerated transportation logistics in India. His research consistently targets decarbonization and sustainable energy solutions.