Abstract
In this study, the influence of grid distribution on CFD model of the primary nozzle and mixing chamber used in refrigeration application was primarily investigated. The only one geometry of primary nozzle and mixing chamber was modeled. The two different grid distributions, fine near-wall grid and regular grid with the identical total grid number, were simulated to investigate the flow phenomena inside the considered system. The appropriate boundary conditions and numerical methods were carefully employed. The simulated entrainment ratios obtained by two different grid arrangements were validated by comparing with the reliable experimental data. The results revealed that the Mach number distributions of these models were different. Further, the outlet total pressure predicted by fine near-wall grid was about 1.3% higher than that obtained by regular grid.
Highlights
IntroductionA steam jet refrigeration system can convert waste heat (low-grade thermal energy), that is rejected from many industrial processes, to useful refrigeration
A steam jet refrigeration system can convert waste heat, that is rejected from many industrial processes, to useful refrigeration
The results showed that the predicted results of these two different grid distributions were in good agreement with experiment
Summary
A steam jet refrigeration system can convert waste heat (low-grade thermal energy), that is rejected from many industrial processes, to useful refrigeration. The electrical energy used in air-conditioning system can be reduced. Another advantageous point is that water, the most environmental friendly substance, can be used as the refrigerant in the system. The performance of steam jet refrigeration system can be defined in term of the coefficient of performance (COP) for steam jet refrigeration as depicted in Eq (1). The stream ejector, which is used where Rm is the entrainment ratio of the steam ejector, which can be defined as a ratio of mass flow rate of primary fluid to mass flow rate of secondary fluid and hg and hf respectively are enthalpy of vapor and liquid
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
