Thermodynamic comparison of various refrigerants for an on-board R290 refrigeration system with economizer subcooling in small fishing boats

Thermal Science and Engineering Progress, Journal Year: 2025, Volume and Issue: unknown, P. 103443 - 103443

Published: Feb. 1, 2025

Language: Английский

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Recent progress in the utilisation of supercritical CO2 in heat exchangers and its application in HVAC systems: Towards a sustainable future

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126472 - 126472

Published: April 1, 2025

Language: Английский

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Experimental investigation of the performance of vapor compression cycle in a water cooler system with low-GWP alternative refrigerants

Thermal Science and Engineering Progress, Journal Year: 2025, Volume and Issue: unknown, P. 103611 - 103611

Published: April 1, 2025

Language: Английский

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Advanced exergy analysis and machine learning based multi-objective optimization of a modified triple cascade refrigeration system for enhanced performance

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126661 - 126661

Published: April 1, 2025

Language: Английский

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Research on the Diffusion and Deposition Characteristics of Refrigerant Under Vertical Upward Leakage in a Confined Space

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(4), P. 1918 - 1918

Published: Feb. 12, 2025

In a confined space, the flammability of alternative refrigerants (such as R717, R290, R32, and R1234yf) poses significant safety risks during leaks. However, in actual refrigeration systems, direction refrigerant leakage is difficult to predict, complicating explosion risk assessment. this work, R1234yf were selected research objects analyze diffusion process deposition characteristics different leaking vertically upward into explore migration flammable under amounts area space. The results show that after vertical leakage, tend impact top wall then move along away from leak source. High-density diffuse primarily near floor, while less dense diffuses side After stops, R1234yf, with highest density, exhibited most pronounced deposition, concentration floor lowest at (1.69% 0.7%, respectively). Conversely, lower-density showed decreasing concentrations increasing concentrations, reduced overall deposition. Compared R290 bottom room (1.32%), R744 demonstrated higher than likely due its viscosity similar densities. addition, using an example, study reveals increase amount prolonged time result gradual expansion area, encompassing walls, floor.

Language: Английский

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Experimental and Simulation-Based Development of Heat-Transfer Correlations for Cyclopentane PCHE

Energies, Journal Year: 2025, Volume and Issue: 18(11), P. 2744 - 2744

Published: May 26, 2025

Within the energy sector, potential to effectively harness considerable present in gas turbine waste heat via an organic Rankine cycle (ORC) could markedly improve overall efficiency. This investigation centers on a printed-circuit exchanger (PCHE) utilizing cyclopentane as working fluid. The study employs combination of experimental techniques and computational fluid dynamics (CFD) simulations conduct in-depth analysis PCHE’s performance, leading successful development highly accurate heat-transfer correlation. A thorough comparison simulation data is carried out examine temperature pressure distributions within exchanger. maximum deviation between correlation-estimated 20% (hot fluid: 15%; cold 18%). These findings offer essential theoretical insights practical guidance for optimizing ensuring stable operation waste-heat recovery systems.

Language: Английский

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R290-Hydrofluoroolefin based low global warming potential refrigerant mixtures for room air conditioner: An energy, exergy, and environmental (3E) analysis

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

Language: Английский

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