Nov '22
The IUP Journal of Mechanical Engineering
ISSN: 0974-6536
A 'peer reviewed' journal distributed by EBSCO and Proquest Database
It is a quarterly journal that publishes research papers dealing with Production engineering, Industrial engineering; Materials engineering; Solid mechanics; Solid and structural mechanics; Fluid mechanics; Fracture mechanics; Biomechanics; Metallurgy, Tribology, Heat transfer; Welding technology; Composite materials; Machine design CAD/CAM; Renewable energy technology; Mechanical maintenance; Refrigeration & Air-conditioning; Quality control and Operational research, etc.
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Entransy Dissipation Analysis of the Data of Halkarni et al. on the Effect of Random Packing Inside Heat Exchangers
Entransy dissipation analysis has been applied to the published results of Halkarni et al. (2018) by considering the flow rates and temperatures of hot and cold fluids to determine whether it leads to improved performance of the heat exchanger. Rates of entransy dissipation, entransy dissipation-based thermal resistances and entransy dissipation numbers have been determined at unchanged conditions. Based on the analysis, the significance of entransy concept has been discussed, which can be implemented for thermal performance investigation of various heat exchangers. The entransy dissipation analysis suggests that utmost effectiveness (0.38) for heat exchanger is at the lowest rate of entransy dissipation (73.5 kJ-K/s) with least thermal resistance (9.585 K-s/kJ) and with smallest dissipation number (0.67). It is well known that for a heat exchanger, the effectiveness should be highest (0.38) but rate of entransy dissipation (73.5 kW-K) should be as low as achievable like exergy destruction rate (0.23 kW) with the conditions of low flow rates of fluids and smaller ball diameter. Same results have been received with different parameters in the previously published paper as the glass ball of 4 mm diameter showed excellent performance. Hence, a comparative analyses shows that the entransy concept can safely be recommended to evaluate the thermal performance of various heat exchangers.
Fatigue Life of Rapid Processed Polymer Specimen: An Experimental Investigation
In materials science, fatigue load is the most major type of load acting on structural components. About 90% of the components fail due to fatigue. Hence, determining the fatigue life of a material is an important aspect in engineering applications. The fatigue life is estimated as number of cycles to failure. In this paper, fatigue life of rapid processed ABS polymer material is determined using rotating bending fatigue test machine. The specimen is prepared in 3D printing machine. This ABS material specimen is shaped like a dog bone, and specimens are tested on the machine. Experimental and simulation tests are carried out, and the results obtained are within acceptable limits. The bending moment applied on the specimen varied from 40 kgf-cm to 70 kgf-cm. The experimental results are compared with the simulation results. The maximum stress or bending stress obtained by manual calculation for 70 kgf-cm bending moment is 136.58 MPa, and by simulation, it is 122.43 MPa with an error of 10.36%. The number of cycles to failure for 70 kgf-cm bending moment obtained by experiment is 9,801 cycles, and by simulation, it is 10,031 cycles with an error of 2.3%. The range of values obtained by experiment and simulation is plotted as stress (S) v/s number of cycles to failure (N) graph.
A Review of Biogas Production and Its Applications
The paper reviews the potential of biogas as an alternative energy source and discusses its entire production aspects. It explains the composition of feedstock, different upgrading/purification processes, and the effect of the parameters of anaerobic digestion on the performance of biogas. The paper further highlights the barriers to the large-scale adoption of biogas as a source of energy and offers solutions to overcome them.
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