You are using an outdated browser. Please upgrade your browser to improve your experience.
Javascript is disabled in your web browser. For full functionality of this site it is necessary to enable JavaScript.
This website is using cookies.
We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.
CPOTE2022 logo
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1046-A

Book of abstracts draft
slider slider slider slider slider slider

Potential improvement of reversible chillers based on estimation of avoidable exergy destruction

Volodymyr VOLOSHCHUK, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Ukraine
Paride GULLO, University of Southern Denmark, Denmark

Today the air-cooled reversible chillers are among the most widespread technologies on the European air-conditioning market. The investment costs of such units have become comparable to the nonreversible ones. Exergy-based methodology can identify location, magnitude and causes of thermodynamic inefficiencies within the energy conversion system. So called avoidable parts of exergy destruction being obtained on the base of the exergy analysis determine potential improvement of processes which can be reached in future due to availability, cost of materials and manufacturing methods. The work presents the results of exergetic analysis of reversible chillers providing both cooling and space heating in varying operational modes. Two types of applications are studied for temperatures at rating conditions defined by EUROVENT. In the first case cooling is designed for 12/7 °C system and heating – for the 40/45 °C system. The second type of system has 23/18 °C design temperatures for cooling and 30/35 °C for heating. Compared to the first one the second type of the reversible chiller has a 26% and a 20% decrease, respectively, of the total and avoidable exergy destruction. The outcomes obtained showed that the both inside and outside heat exchangers have the highest priority for improvement revealing the biggest shares of avoidable exergy destruction within the system. Compared to the heat exchangers the compressor enhancement was found to lead to the lowest potential decrease of exergy destruction

Keywords: Reversible chiller, Avoidable exergy destruction, Efficiency enhancement, Heating, Cooling
Acknowledgment: This work was supported by the Ministry of Education and Science of Ukraine (Project number: 0122U001750).