Interdisciplinary Studies of Jet Systems using Euler Methodology and Computational Fluid Dynamics Technologies

HighTech and Innovation Journal, Journal Year: 2023, Volume and Issue: 4(4), P. 703 - 719

Published: Dec. 1, 2023

This study aims to conduct interdisciplinary research using computerized solutions inventive problems in fluidics. The chosen direction of work relates the scientific search for new opportunities extremal control thrust vector within a complete geometric sphere (with range rotation angle change being ±180° any direction). assesses prospects emergence patentable innovative maneuverable unmanned vehicles. One most urgent tasks is increase process efficiency forming fluid medium flow, expanding controlling this flow parameter. uses an approach with simulation modeling. authors paper reveal possibilities ejector two curved mixing chambers create special jet units. Calculations (CFD) have confirmed performance simulator when 90° and 180° rotation. Manufacturing physical micromodels used additive technologies allow modeling under laboratory conditions. Using “data mining” methods, it was shown first time that, based on Euler’s ideas methodology, possible methodology teaching solving problems. results apply power engineering Some studies can be computer programs working together artificial intelligence advanced techniques technologies. Doi: 10.28991/HIJ-2023-04-04-01 Full Text: PDF

Language: Английский

Energy and Exergy Analysis of Transcritical CO2 Cycles for Heat Pump Applications

Published: July 24, 2024

Heat pumps are recognized as a key tool in the energy transition toward carbon-neutral society, enabling electrification of heating sector at least for low- and medium-temperature heat demands. In recent years, natural refrigerants have been reconsidered due to their low environmental impact: among them, CO2 is safe option without impact on ozone layer global warming potential compared synthetic fluids. However, consequence its thermophysical properties, thermodynamic cycle transcritical particularly suitable specific end-user temperature profiles. This paper analyzes systematic thorough way most significant modifications reference that proposed literature improve performance, finding how optimum configurations change with rated operating conditions (inlet glide demand, ambient temperature). Exergy analysis explains why there an optimal gas cooler pressure trend average split into two distinct regions, clearly recognizable all layouts. The maximum coefficient performance (COP) varies 1.52–3.74 range, second-law efficiency 6.436.1, up 15.45MPa, depending profile. effective modification ejector internal exchanger, which raises COP 1.84–4.40 (second-law 8.745.56). presented results provide extensive guide understanding behavior predict pump applications.

Language: Английский

Energy and Exergy Analysis of Transcritical CO2 Cycles for Heat Pump Applications

Sustainability, Journal Year: 2024, Volume and Issue: 16(17), P. 7511 - 7511

Published: Aug. 30, 2024

Heat pumps are recognized as a key tool in the energy transition toward carbon-neutral society, enabling electrification of heating sector at least for low- and medium-temperature heat demands. In recent years, natural refrigerants have been reconsidered due to their low environmental impact: among them, CO2 is safe option without an impact on ozone layer global warming potential compared synthetic fluids. However, consequence its thermophysical properties, thermodynamic cycle transcritical particularly suitable specific end-user temperature profiles. This paper analyzes systematic thorough way most significant modifications reference that proposed literature improve performance, finding how optimal configurations change with rated operating conditions (inlet glide demand, ambient temperature). Exergy analysis explains why there gas cooler pressure trend average split into two distinct regions, clearly recognizable all layouts. The maximum coefficient performance (COP) varies 1.52–3.74 range, second-law efficiency 6.4–36.1%, up 15.45 MPa, depending profile. effective modification ejector internal exchanger, which raises COP 1.84–4.40 (second-law 8.7–45.56%). presented results provide extensive guide understanding behavior predict pump applications.

Language: Английский