Vodice The Imperial Park Hotel 26 - 28 March 2025
27 th International Conference on Heating, Cooling and Air-conditioning
ABSTRACT
PAPER
doc. dr. sc. Saša MUDRINIĆ University of Zagreb Faculty of Mechanical Engineering and Naval Architecture Ulica Ivana Lučića 5 10 000 Zagreb Croatia e-mail: sasa.mudrinic@fsb.unizg.hr
MP4
PRESENTATION VIDEO
He was born on 8 May 1972 in Vukovar. He graduated in mechanical engineering in 1998 from the Faculty of Me- chanical Engineering and Naval Architecture of the University of Zagreb (FSB), in the Process and Energy Course. He also received his master's degree from FSB in 2003 and his PhD degree in 2012. Since 1998, he has been working at the FSB's Chair of Technical Thermodynamics of the Department of Thermodynamics, Thermal and Process Engi- neering, where he is currently an assistant professor and also the Chair's head . He is the author and co-author of a number of scientific and professional papers.
Nikola BOROVNIK, mag. ing. mech. University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia doc. dr. sc. Luka BOBAN University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia
ENERGY AND EXERGY ANALYSIS OF A DIRECT-EXPANSION SOLAR-ASSISTED HEAT PUMP SYSTEM
This paper presents a theoretical assessment of the energy and exergy performance of a direct- expansion solar-assisted heat pump system for domestic hot water heating, utilizing R134A and R407C refrigerants. The analysis was conducted using meteorological data for a typical year (TMY) from the Zagreb-Maksimir and Split stations, sourced from the Joint Research Center (JRC). In addition to solar radiation, the data includes air temperature, relative humidity, wind speed, and
long-wave radiation. Performance simulations were performed for representative months, Jan- uary and July. The effects of water storage tank capacity and the working fluid flow rate on com- pressor power consumption and heat pump COP were analyzed based on radiation data and col- lector surface area. Additionally, an exergy anal- ysis was conducted, estimating the irreversibilities and exergy efficiencies of the heat pump and its system components.
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4th Thematic Section - ENERGY EFFICIENCY AND RENEWABLES
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