nCORETech-17

Abstract: This paper investigates the improvements in business process in some engineering industries after applying the Product life cycle management (PLM) system. In addition to this the prospective trend is also analysed. Some case studies are used to perceive the transformation in business. Case studies indicate a robust association between application of PLM and business process growth. This is recognized as apparent gain for their use in engineering industries Keywords: PLM, business process, case studies, engineering industries.

Abstract: A fuel cell is an electrochemical energy converter that converts the chemical energy of fuel into electrical energy. Among the various types of fuel cells, the present review focusses on Proton exchange membrane fuel cells (PEMFCs). High energy conversion efficiencies, quick start-up and zero by-product emissions are the key advantages of PEMFCs. Main components of PEMFCs are Membrane Electrode Assembly (MEA), Gas Diffusion Layer (GDL), bipolar plates and so on. This paper mainly reviews and summarizes research carried out on proton exchange membrane fuel cells in the past six years (2010 to 2016). For ease and clarity of presentation, the present review is divided into experimental, numerical, combined experimental and numerical, and studies on some of the reviews on fuel cell. The paper also lists conclusions and suggestions for future work. Keywords: Fuel cells, proton exchange membrane fuel cells, gas diffusion layer, bipolar plate.

Abstract: Property economics favours the vertical development of cities but flow of groundwater can be affected by the use of underground space in them. In this paper we will study the impact of disturbances caused by underground structures (tunnels, basements of buildings, deep foundations, etc.) on the groundwater flow in aquifers. Impervious structures modify the groundwater flow pattern because the structure reduces totally or partially the aquifer section Keywords: Barrier effect, foundation, groundwater, tunnels, piles.

Abstract: Chlorofluorocarbon and hydrochlorofluorocarbon refrigerants have been widely used in conventional cooling systems and in vehicle air conditioning. Major commercial refrigerant, Chloro-fluoro carbons (CFCs), are going to be phase out shortly as part of Montreal Protocol since they caused the phenomenon called greenhouse effect and depletion of ozone layer. In the case of automobiles approximately 10% of the energy available at the crankshaft in a gasoline/diesel operated vehicle is used for operating the compressor of the vehicle's air -conditioning system. This is a huge loss if one takes into account the fact that the thermal efficiencies of most gasoline/diesel operated vehicles range from 20-30% when in pristine condition. The bottom line is that a great deal of fuel is consumed for air conditioning. In addition to this is the refrigerant usually R12 or R22 leaks easily. Being a secondary refrigerant, it is also harmful to the environment. Therefore, due to adsorption air-conditioning technology attracted much attention recently as an alternative solution its advantage of environmental friendliness. This system as it powered by waste heat can help to reduce required energy and thermal pollution. In this paper, an exploration has been done to research the possibility of waste heat recovery and its subsequent utilization in air conditioning system of a vehicle. Keywords: Engine Waste Heat-Air Conditioning System-Adsorption cooling-Adsorber bed-Desorption.

Abstract: Interferometry is an optical non-intrusive technique becoming increasingly popular in the flow and heat transfer visualisation and measurement. In the present study, experimental investigation on heat transfer properties of Zinc Oxide (ZnO) Nano fluids using Michelson Interferometry has been carried out. The temperature, at a reference point in the Nano fluid, is recorded by a thermocouple placed at a known distance from the heat source. Interference patterns are captured by a camera and analysed using an image processing tool in MATLAB software. From the observations, it is pellucid that the change of fluid temperature in one path of the coherent laser beam results in the deformation of the interference pattern. Comparison of initial and deformed fringe patterns using digital image processing technique, the temperature distribution near the heat source has been obtained. Recorded interferograms are to be quantitatively analysed to retrieve two dimensional temperature fields. Real time evolution of thermal boundary layers as a function of concentration of Nano fluids is to be recorded in order to understand the plausible role of Nano particle in the heat transfer enhancement. Keywords: Nano fluids, heat transfer, interferometry, temperature.

Abstract: Geosynthetic reinforcement are placed in soil below footings in order to improve the bearing capacity and to improve the properties of weak soil. In general, soils possess a low tensile strength. The main objective of strengthening the soil mass is to increase bearing capacity improve stability and decreased settlements and lateral deformations. One of the approaches is the use of polymeric materials. Geosynthetic is a well-known technique in soil reinforcement. In almost every application, the common trend is to place the reinforcement in horizontal layers. Theoretically, for the reinforcement to be effective, it must pass through the tensile arc. Hence the ideal pattern for reinforcement will be horizontal below the footing and becomes progressively more vertical further away from the footing. This paper presents the results of finite element analyses carried out to evaluate the effect of pattern of reinforcement on the axial forces on geogrid and stress distribution at the interface of geogrid and sand. The results of finite element analyses are validated by carrying out a series of Laboratory Scale Load Tests. It is observed that the pattern of reinforcement significantly influences the axial force on geogrid and stress distribution at the interface between sand and geogrid. Keywords: Geosynthetic; Tensile Arc; Finite Element Analyses; Foundation Bed; Weak Soil.

Abstract: Geosynthetic reinforcement are placed in soil below footings in order to improve the bearing capacity and to improve the properties of weak soil. In general, soils possess a low tensile strength. The main objective of strengthening the soil mass is to increase bearing capacity improve stability and decreased settlements and lateral deformations. One of the approaches is the use of polymeric materials. Geosynthetic is a well-known technique in soil reinforcement. In almost every application, the common trend is to place the reinforcement in horizontal layers. Theoretically, for the reinforcement to be effective, it must pass through the tensile arc. Hence the ideal pattern for reinforcement will be horizontal below the footing and becomes progressively more vertical further away from the footing. This paper presents the results of finite element analyses carried out to evaluate the effect of pattern of reinforcement on the stresses at interface between the reinforced foundation bed and underlying weak soil. The results of finite element analyses are validated by carrying out a series of Laboratory Scale Load Tests. It is observed that the pattern of reinforcement significantly influences the stresses at interface between the reinforced foundation bed and underlying weak soil. Keywords: Geosynthetic; Tensile Arc; Finite Element Analyses; Foundation Bed; Weak Soil.

Abstract: Cryocoolers are used for achieving temperature below 150 K. Regenerator is an essential part of cryocooler. Regenerators are made up of metallic wire meshes. The application of proper hydrodynamic and heat transfer parameters is very much important in the analysis of wire mesh regenerator using CFD. In this paper, a review on various friction factor correlations proposed for flow through regenerators under steady and steady oscillatory flow are presented. The effect of geometric and operating parameters of the flow through porous media on the friction factor correlations is discussed. The effects of porosity, frequency, charge pressure etc are discussed in detail. Selection of suitable friction factor correlation is important for determining the Darcy and Forchheimers inertial coefficients of porous media. Thus this review will help the designer to select the proper correlation for the porous media and to decide the values of above coefficients for the analysis of the regenerator using CFD. Keywords: Cryocooler, Regenerator, wire mesh, Porous media.