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View article: Simulation of the Internal Flow Field of Jet Pumps Using the RANS Method
Simulation of the Internal Flow Field of Jet Pumps Using the RANS Method Open
This paper focuses on CFD simulations of the internal flow field of jet pumps, which are passive pumping devices.A numerical method based on the RANS equations is proposed, and its abilities are analysed by comparing the obtained results w…
View article: 1D modelling of the liquid-gas jet pump performance
1D modelling of the liquid-gas jet pump performance Open
The performance of a liquid-gas jet pump, which uses a high-velocity liquid flow to compress and entrain a gas flow, can be divided into two modes, on-design and off-design. The present paper investigates the mentioned modes of performance…
View article: R718+r717 high temperature cascade heat pump with liquid injection invapor compression processes
R718+r717 high temperature cascade heat pump with liquid injection invapor compression processes Open
High temperature cascade heat pumps (HTCHP) with water, aka R718, at the high stage (HS) and ammonia, aka R717, at the low stage (LS) exhibit a great potential to satisfy both industrial heating and cooling demands while mitigating the glo…
View article: Prediction of Performance and Geometrical Parameters of Single-Phase Ejectors Using Artificial Neural Networks
Prediction of Performance and Geometrical Parameters of Single-Phase Ejectors Using Artificial Neural Networks Open
Ejectors have gained renewed interest in the last decades, especially in heat-driven refrigeration systems, to reduce the load of the compressor. Their performance is usually influenced by many factors, including the working fluid, operati…
View article: Droplet injection at the diffuser outlet in an ejector-based refrigeration cycle working with R245fa.
Droplet injection at the diffuser outlet in an ejector-based refrigeration cycle working with R245fa. Open
This work presents a combined experimental and thermodynamic approach used to investigate the influence of droplet injection on the performance of an ejector-based refrigeration cycle developed for Heating, Ventilation and Air-Conditioning…
View article: Prediction of Performance for an Ejector Refrigeration Cycle Workingwith R245fa Using Artificial Neural Network
Prediction of Performance for an Ejector Refrigeration Cycle Workingwith R245fa Using Artificial Neural Network Open
In this paper, an artificial neural network (ANN) model is used to predict the performance parameters of an ejector refrigeration cycle working with R245fa.Three approaches are used to achieve this objective: experimental analysis, thermod…
View article: Numerical Study of the Influence of the Primary Stream Pressure on the Performance of the Ejector Refrigeration System Based on Heat Exchanger Modeling
Numerical Study of the Influence of the Primary Stream Pressure on the Performance of the Ejector Refrigeration System Based on Heat Exchanger Modeling Open
Numerical models of the heat exchangers in ejector refrigeration system (ERS) were developed and validated with the experimental data. The models were based on the switched heat exchangers model using the moving boundary method, which were…
View article: Fast And Accurate Co2 Properties Calculation Algorithm For Massive Numerical Simulations Of Supersonic Two-phase Ejectors
Fast And Accurate Co2 Properties Calculation Algorithm For Massive Numerical Simulations Of Supersonic Two-phase Ejectors Open
This work presents a look-up table method to compute the thermodynamic properties of CO2. It is motivated by the massive employment of this fluid in the industrial domain, especially in the ejector-expansion cycle. Computational Fluid Dyna…
View article: Effect Of Assumptions Of Normal Shock Location On The Design Of Supersonic Ejectors For Refrigeration
Effect Of Assumptions Of Normal Shock Location On The Design Of Supersonic Ejectors For Refrigeration Open
The complex oblique shock phenomenon can be simply assumed as a normal shock at the constant area section to simulate a sharp pressure increase and velocity decrease in 1-D thermodynamic models. The assumed normal shock location is one of …
View article: Exergy Analysis of a Parallel-Plate Active Magnetic Regenerator with Nanofluids
Exergy Analysis of a Parallel-Plate Active Magnetic Regenerator with Nanofluids Open
This paper analyzes the energetic and exergy performance of an active magnetic regenerative refrigerator using water-based Al2O3 nanofluids as heat transfer fluids. A 1D numerical model has been extensively used to quantify the exergy perf…