Vol.12, No.4, November 2023.                                                                                                                                                                               ISSN: 2217-8309

                                                                                                                                                                                                                        eISSN: 2217-8333


TEM Journal



Association for Information Communication Technology Education and Science

Investigation of the Concentric Heat Pump with Improved Energy Performance


Demessova Saule, Omarov Rashit, Ivaylo Stoyanov, Omar Dauren, Yerzhigitov Yerkin, Abdygaliyeva Slushash


© 2023 Ivaylo Stoyanov, published by UIKTEN. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. (CC BY-NC-ND 4.0)


Citation Information: TEM Journal. Volume 12, Issue 4, Pages 2408-2415, ISSN 2217-8309, DOI: 10.18421/TEM124-53 November 2023.


Received: 20 July 2023.

Revised:   21 September 2023.
Accepted: 06 October 2023.
Published: 27 November 2023.




This paper investigates the energy characteristics of the concentric heat pump. The heat exchanger of the evaporator of the "pipe in pipe" type, through the inner copper tube of which the refrigerant circulates, and inside the outer pipe - the coolant, is placed in a spiral around the compressor, cooling it and at the same time absorbing the heat released by it. The new design improves technical and economic performance. Experimental results were carried out, which confirm the possibility of maintaining the compressor temperature (80-90°C), increasing the heat output and conversion coefficient (COP) by an average of 10-15%. The proposed technical solution makes it possible to improve the energy efficiency of the concentric heat pump due to the absorption of the excess heat from the evaporator in the general heat flow and to reduce the emissions of CO2.


Keywords – Heat pump, energy efficiency, low potential heat source.



Full text PDF >  



Copyright © 2023 UIKTEN
Copyright licence: All articles are licenced via Creative Commons CC BY-NC-ND 4.0 licence