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- 저자 : ANNAMALAI MANI (검색결과 2 건)
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NUMERICAL STUDIES ON VERTICAL TUBULAR GENERATOR IN VAPOR ABSORPTION REFRIGERATION SYSTEM
PASUPATHY BALAMURUGAN,ANNAMALAI MANI 대한설비공학회 2011 International Journal Of Air-Conditioning and Refr Vol.19 No.2
A model has been developed based on Colburn–Drew type formulation to analyze a vertical tube in tube stainless steel generator with forced convective boiling. Desorption of refrigerant vapor from refrigerant–absorbent solution takes place in the inner tube of the generator, when hot water through the annulus is used as heating medium. Simultaneous heat and mass transfer phenomena of desorption are described mathematically using the mass and energy balances, considering the heat and mass transfer resistances in liquid as well as vapor phases. Model equations are solved simultaneously by means of initial value problem solvers using explicit Runge–Kutta method with 4th order accuracy. A computer code has been developed in MATLAB to obtain the results. A parametric analysis has also been performed to study the effect of various parameters on the performance of the generator.
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REVIEW ON EJECTOR OF VAPOR JET REFRIGERATION SYSTEM
PARVEEN BANU JIAUTHEEN,MANI ANNAMALAI 대한설비공학회 2014 International Journal Of Air-Conditioning and Refr Vol.22 No.3
Vapor Jet Refrigeration (VJR) system is attractive among various heat operated refrigeration systems, because it has the potential of utilizing low grade thermal energy with source temperature as low as 60C, which could be harnessed from renewable energy, waste heat, automobile-exhaust, etc. Also absence of moving parts in this system resulted in lesser maintenance costs. In addition tothat this system causes very low environmental pollution due to almost negligible consumption ofhigh grade energy from fossil fuels for running a small liquid pump of the system. Although VJRwas invented very long back, still performance improvement to compete with vapor compressionrefrigeration system is in progress. Plenty of research has been carried out in different aspects forenhancing the efficiency of this technology. The present work/paper gives an overview of VJRsystem and its progression in the aspect of performance improvement. The developmental progressof the VJR technology presented in this paper has been categorized into the following groups,namely (a) general performance of an ejector, (b) numerical analysis, viz., classical one-dimensionalanalysis and Computational Fluid Dynamics (CFD) analysis, (c) experimental studies, (d) flowvisualization studies, (e) performance enhancement techniques, and (f) two-phase ejector. And alsopresented a glimpse of some of the review papers from literature on VJR system.
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