Search Results

1 - 10 of 11 items :

  • "efficiency" x
  • Thermodynamics x
Clear All
Experimental Investigation of a Centrifugal Pump Hydraulic Performance in Hydraulic Transmission of Solids

categories: dynamic pump, positive displacement pumps, and special pumps. Centrifugal slurry pumps are widely used in the oil sand industry, mining, ore processing, waste treatment, cement production, and other industries to move mixtures of solids and liquids. Wear of slurry pump components, caused by abrasive and erosive solid particles, is one of the main causes of reduction in the efficiency and useful life of these pumps. This leads to unscheduled outages that cost companies millions of dollars each year. The idea is to combine predictions of multiple classifiers to

Open access
Development of a cryogenic condenser and computation of its heat transfer efficiency based on liquefaction of nitrogen gas

required cold in the inside slots of the condenser. The refrigerant gas must have its normal condensation point below that of the gas being liquefied. The present article highlights the development of a cryogenic condenser in detail and its efficiency testing methodology in-situ by placing it in the Cryogenerator for liquefying nitrogen. 2 Material and Methods 2.1 Material selection Materials should be prudently selected for any cryogenic application as there can be extreme changes in the properties of the material being used when exposed to low temperature

Open access
Numerical analysis of the thermal behavior of building integrated hybrid solar wall

) identical to that of the cavity size of the stack, and the second (L) is extended. It has shown the use of two areas for effective simulation for a variety of ventilation; however, the use of a single field identical to that of the cavity of the chimney size is favored for long chimneys where the wall strength is dominant. Photovoltaic cells are adapted to receive the electrical gain using a hybrid solar wall. Basak and Zerrin [ 5 ] studied the design parameters that influenced the thermal efficiency of a solar wall such as the south facade. A numerical model carried

Open access
Finite element simulation and experimental validation of the effect of tool wear on cutting forces in turning operation

Abstract

Machining is the most widely used process in manufacturing, and tool wear plays a significant role in machining efficiency and effectiveness. There is a continuous requirement to manufacture high-quality products at a lower cost. Many past researches show that variations in tool geometry affect the cutting forces significantly. The increase in cutting forces leads to excessive vibrations in the system, giving a poor surface finish to the machined product. In this work, a 2D coupled thermo-mechanical model is developed using Abaqus/Explicit to predict the cutting forces during turning of mild steel. Johnson–Cook material model along with damage model has been used to define the material behavior. Coulomb’s friction model is considered for defining the interaction between the tool and the work piece. Metal cutting process is simulated for different sets of cutting conditions and compared with experimental results. The finite element method results correlate well with the experimental results.

Open access
Enhancing the fuel economy of a plug-in series hybrid vehicle system

{array}{} \displaystyle T_e=\frac{r_{tire}}{GR_{t}GR_fn_tn_f}F_X \end{array}$$ (5) where GR t is the gear ratio, GR f is the final drive ratio and r tire is the radius of the wheel. Their values are shown in Table 1 . n t and n f are the efficiencies for transmission and final drive, respectively, assumed to be 1. Figure 5 shows the engine torque model. Figure 5 Engine torque model Another part of this model is engine torque control. Actual engine torque is calculated by using the desired torque from engine torque model and engine speed from engine

Open access
Investigation of mechanical behavior of friction stir welded joints of AA6063 with AA5083 aluminum alloys

welding process can be dealt with, but the efficiency of the joint is unsatisfactory. A suitable filler material is a crucial problem in fusion welding process. Friction stir welding (FSW), developed by the Welding Institute (TWI) in 1991 [ 1 ], is the available option to overcome the above mentioned problems. It is a solid state welding process, which has many advantages such as joining of dissimilar aluminum alloys, possessing excellent mechanical properties when compared to TIG and MIG welding [ 2 ], grain refinement with fine distribution of precipitates (which is

Open access
Case study on the effectiveness of condition monitoring techniques for fault diagnosis of pumps in thermal power plant

monitoring of systems in thermal power plant for vibration, motor signature, noise and wear debris analysis, World Sci. News, 91, December 2017, 31–43, 2018. Kurien C. Srivastava A. K. “Condition monitoring of systems in thermal power plant for vibration, motor signature, noise and wear debris analysis World Sci. News 91 December 2017 31 43 2018 [9] Dlamini, V., Naidoo, R. and Manyage, M.: Anon-intrusive method for estimating motor efficiency using vibration signature analysis, Int. J. Electr. Power Energy Syst., 45(1), 384–390, 2013. 10.1016/j.ijepes.2012.09.015 Dlamini

Open access
A Detailed Study of Row-Trenched Holes at the Combustor Exit on Film-Cooling Effectiveness

1 Introduction Advanced gas turbine industries are trying for higher engine efficiencies. Brayton cycle is a key to achieve this purpose. In this cycle, to have higher gas turbine engine efficiency, the combustor’s outlet temperature must increase [ 1 ]. But such hot flows cause non-uniformities at the end of the combustor and the inlet of turbine and damage the critical parts. Film cooling is the most well-known method of preservation. In this technique, a low-temperature thin layer attaches on a surface and protects it against hot streams. To get better

Open access
Numerical study of the thermal and hydraulic performances of heat sink made of wavy fins

] numerically studied the profile’s effect on the flow and thermal characteristics between the plate fins. The results indicate that the U-shaped profile improves the overall thermal efficiency. In order to improve the performance of a plate fin heat sink fitted with two vortex generators, Hung et al . [ 6 ] studied the effects of the distance between the vortex generators and the heat sink, the distance between the vortex generators, and the angle of incidence and height of generators. The results show that the angle of incidence of 30° is preferable to optimize the

Open access
Experimental Investigation of Drilling Small Hole on Duplex Stainless Steel (SS 2205) Using EDM

drilled in zinc using silicon electrode. The positive polarity has more machining efficiency, and low relative wear in short pulse and moderate electrical parameters are suggested [ 7 ]. The geometrical accuracy by adjusting discharge energy and electrode diameter and its influence on the amount of MRR were investigated [ 8 ]. Four different electrode diameters ranging from 1.6 to 1.9 mm diameters are used to achieve the desired hole on D2 tool steel/Tool steel X153CrMoV12-1. High-speed whole drilling performed on nickel-based aerospace alloy using EDM and laser

Open access