Browsing NTNU Open by Author "Kobalava, Halina"
Now showing items 1-4 of 4
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Experimental Investigation of a Low-Temperature Three-Circuit Cooling System for an Electric Motor under Varying Loads
Konovalov, Dmytro; Tolstorebrov, Ignat; Kobalava, Halina; Lamb, Jacob Joseph; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2023)This study investigates a low-temperature three-circuit cooling system for a 55 kW industrial electric motor. The cooling system provides an increase of the power-to-dimension ratio by 63%, together with an improvement in ... -
Investigation of Thermopressor with Incomplete Evaporation for Gas Turbine Intercooling Systems
Yu, Zidong; Løvås, Terese; Konovalov, Dmytro; Trushliakov, Eugeniy; Radchenko, Mykola; Kobalava, Halina; Radchenko, Roman; Radchenko, Andrii (Peer reviewed; Journal article, 2023)One of the promising ways to increase fuel and modern gas turbine energy efficiency is using cyclic air intercooling between the stages of high- and low-pressure compressors. For intercooling, it is possible to use cooling ... -
Optimizing Low-Temperature Three-Circuit Evaporative Cooling System for an Electric Motor by Using Refrigerants
Konovalov, Dmytro; Tolstorebrov, Ignat; Iwamoto, Yuhiro; Kobalava, Halina; Lamb, Jacob Joseph; Eikevik, Trygve Magne (Journal article; Peer reviewed, 2024)This article presents modeling results and a comprehensive analysis of evaporative cooling systems designed for electric motors using the refrigerants R744 (trans-critical), R134a, R600a, and R290. This study aims to ... -
Recent Developments in Cooling Systems and Cooling Management for Electric Motors
Konovalov, Dmytro; Tolstorebrov, Ignat; Eikevik, Trygve Magne; Kobalava, Halina; Radchenko, Mykola; Hafner, Armin; Radchenko, Andrii (Peer reviewed; Journal article, 2023)This study provides an overview of new trends in the development of cooling systems for electric motors. It includes a summary of academic research and patents for cooling systems implemented by leading motor manufacturers ...