Results 41 to 50 of about 22,112,552 (178)
Ejector Performance of a Pump-less Ejector Refrigeration System Driven by Solar Thermal Energy [PDF]
, 2012 Ejector refrigeration is considered as one of the three main ways of refrigeration and air-conditioning to utilize lowgrade energy. Use of pump-less technology to eliminate the mechanical circulating pump of the working fluid from condenser to generator ...
Huang, Yunzhou +4 more
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Performance Prediction of Compressible Two-Phase Flow through Ejectors [PDF]
ERJ. Engineering Research Journal, 2015 The objective of present work is to investigate theoretically the performance of two-phase flow (gas-liquid) through ejectors. The numerical investigation is based on non-homogeneous, (liquid and vapor velocities are not equal), non-equilibrium (liquid and vapor temperatures are not equal),two-fluid model, (Eulerian-Eulerian), conservation equations ...
N.I.I Hewedy +3 more
openaire +1 more source
Swirl-Bypass Nozzle for CO2 Two-Phase Ejectors: Numerical Design Exploration
Energies, 2022 In this work, a novel ejector design concept of a swirl-bypass nozzle is proposed to improve off-design performance of CO2 two-phase ejectors. The swirl-bypass nozzle allows part of the flow to bypass into the ejector mixing chamber to generate swirl ...
Knut Emil Ringstad +3 more
doaj +1 more source
, 2022 The heat pump systems play a significant role in the global energy transition process of household heating sources towards zero-emission. One of the key technologies to improve the efficiency of heat pump systems utilizing natural working fluids is ...
J. Smolka +13 more
core +1 more source
Study on Ejector - Vapor Compression Hybrid Air Conditioning System Using Solar Energy [PDF]
, 2012 The ejector cycle has been recognized as a promising cycle for the utilization of solar energy for cooling. However, the conventional ejector cycle suffers from low efficiency owing to a low evaporation temperature.
Dang, Chaobin +2 more
core +1 more source
Optimal thermodynamic parameters of two-phase ejector refrigeration system for buses
Applied Thermal Engineering, 2017 Abstract Air-conditioning is necessary for the comfort of passengers in commercial buses. However, installing an air-conditioning system can add extra load on the engine and result in extra fuel cost. Therefore, an improvement in the air-conditioning system can lower the fuel consumption of the buses and reduce the size of the evaporator and the ...
Unal, Saban +2 more
openaire +2 more sources
Investigation of the effect of the primary nozzle throat diameter on the evaporator performance of a
Journal of Thermal Engineering, 2018 The present work aims to perform the thermodynamic analysis of an ejector expansion refrigeration cycle (EERC) with a constant pressure two phase flow ejector and to present the effect of primary nozzle throat diameter on cooling capacity of the EERC ...
C. Seckin
doaj
Entropy, 2022 In this paper, for a highly coupled two-stage ejector-based cooling cycle, the optimization of primary nozzle length and angle of the second-stage ejector under varied primary nozzle diameters of the second stage was conducted first. Next, the evaluation
Jia Yan, Yuetong Shu, Chen Wang
doaj +1 more source
Analysis of ejector expansion refrigeration cycle with two phase flow ejector
, 2017 The aim of this study is to determine the operational characteristics of an ejector expansion refrigerationcycle (EERC) working with refrigerant R134a. A constant-area two phase flow ejector at critical mode ismodeled to determine the effect of condenser pressure (Pcond) and evaporator pressure (Pevap) on theperformance parameters of EERC: ejector ...
openaire +3 more sources
Energies, 2019 In this study, the exergy analysis of a CO2 (R744) two-phase ejector was performed using a 1D model for both single and double choking conditions. The impact of the back pressure on the exergy destruction and exergy efficiencies was presented to evaluate
Sahar Taslimi Taleghani +2 more
doaj +1 more source