Volume-5 (National Conference on Advances in Engineering, Technology & Management (AETM'15))
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Paper Type | : | Research Paper |
Title | : | Drying Characteristics of vermicelli in a Slant height greenhouse Dryer |
Country | : | India |
Authors | : | Nidhi |
Abstract: Drying is the process of moisture removal from the product. The greenhouse dryer operates in the two different modes, namely, natural convection and forced convection modes. In the present study greenhouse dryer is designed and fabricated to evaluate their performance under forced convection mode to drying the vermicelli of different thickness. A slant height greenhouse dryer have been fabrication of 120×80 cm² size. Various experiments have been conducted for drying the vermicelli with diameter 3 mm, 2 mm, and 1.25 mm to dry inside the slant height greenhouse dryer. Many parameters such as moisture ratio, drying rate (g/min), and moisture content on dry basis (%) have been evaluated to determine the performance of given greenhouse dryer. The drying rate has been observed to decrease with the increase in vermicelli thickness during its drying in slant the greenhouse dryer. A linear regression analysis has been conducted to investigate the accuracy of prediction of five selected thin layer drying models. Five mathematical models, namely, Lewis, Page, Modified Page, Henderson and Pabis, and Wang and Singh models have been fitted to the experimental data of moisture ratio for vermicelli dried in slant greenhouse dryer under forced convection mode. It has been observed the Wang and Singh model shows the best agreement between experimental and theoretical values of moisture ratio.
Keywords: Mathematical modeling, moisture content, slant greenhouse dryer, vermicelli
[1] M. Kumar, R.S. Kumar and N. Jain, Convective Heat Transfer Coefficient for Indoor Forced Convection Drying of vermicelli, IOSR Journal of Engineering, 2(6) 2012, 1282-1290.
[2] P. Kumar, Natural Convection Greenhouse Drying of Vermicelli: an Experimental Study, International journal of research in aeronautical and mechanical engineering, 2(3)2014, 60-80.
[3] M. Condor, and L. Saravis, The Performance of Forced Convection Greenhouse driers, Renewable Energy, 13(4) 1998 453-469.
[4] S. Janjai, C. Chaichoet, and P. Intawee, Performance of a PV-ventilated Greenhouse Dryer for Drying Bananas, Asian Journal on Energy and Environment 6(2)2005, 133-138.
[5] C. Loha, R. Das, B. Choudhury, and P. K. Chatterjee, , Evaluation of Air Drying Characteristics of Sliced Ginger Zingiber officinale in a Forced Convective Cabinet Dryer and Thermal Conductivity Measurement, J Food Process Technol, 6(3)2012, 130, doi:10.4172/2157-7110.1000160.
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Paper Type | : | Research Paper |
Title | : | Numerical Model to Estimate the Thermophysical Properties of Oxygen at Critical Pressure to be used in SMES |
Country | : | India |
Authors | : | Aal Arif Sarkar || Raja Sekhar Dondapati |
Abstract: The development of High Temperature Superconductors (HTS) made a path for Superconducting Magnetic Energy Storage Systems (SMES) to emerge as a viable technology for high energy storage uses. Moreover, the essence for need of a dependable, fast, stable and flexible power compensation devices in the power production industries make the ideal opportunities for SMES. However, an active refrigeration system is required to keep these superconducting magnets at a very low temperature, to allow indefinite circulation of electrical energy in the superconducting magnetic loop. In the present work, a novel approach of cooling concept with oxygen at critical pressure region has been proposed to maintain the superconducting state of HTS magnet in SMES. Moreover, the thermophysical properties such as density, viscosity, specific heat and thermal conductivity have been studied over a wide range of temperatures (154.58K-204.58K) at critical pressure (Pc=50.43 bar). Also, the correlation for oxygen at critical pressure has been developed. These correlations can be used in prior prediction of SMES performance under various operating conditions and also improve the efficiency of SMES. Moreover, the SMES system can be possibly made smaller and cost effective.
Keywords: SMES, Pure Oxygen, Thermophysical Properties, Correlation
[2] M. Park, A.R. Kim, K.M. Kim, J.G. Kim, I.K. Yu, S.H. Kim, K. Sim, M.H. Sohn, K.C.Seong, (2011),"HTS SMES Application for the Frequency Stabilization of Grid-Connected Wind Power Generation System", J Supercond Nov Magn 24: pp.1007–1014.
[3] CHENG ShiJie, TANG YueJin, (2007), "High Temperature SMES for improving power system stabilities", Science in China Series E: Technological Sciences, Vol. 50, No.4, pp. 402-412.
[4] Zubair A. Baig and Abdul-Raoof Amoudi, (2013), "An Analysis of Smart Grid Attacks and Countermeasures", Journal of Communications, Vol. 8, No. 8, pp. 473-479.
[5] Kristian Fossheim and Asle Sudbo, "Superconductivity: Physics and Applications", © 2004 John Wiley & Sons Ltd.
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Paper Type | : | Research Paper |
Title | : | CFD Analysis of Earth-Air Heat Exchanger to Evaluate the Effect of Parameters on Its Performance |
Country | : | India |
Authors | : | Arpit Thakur || Aashish Sharma |
Abstract: An earth coupled heat exchanger can be a promising passive technique for conditioning of buildings if proper design parameters are chosen, hence for thermal performance analysis of heat exchanger which uses ground as heat source/sink, choice of design parameters is crucial. In present study air is used as heat transferring medium hence the system is termed by EAHX i.e. earth to air heat exchanger. Analysis is conducted considering hot and dry weather conditions with ambient temperature of 319K using computational fluid dynamics modeling and simulation. Effect of applying a finned model compared with a finless model on thermal performance of EAHX is analyzed. For a model buried in soil of thermal conductivity of 4 W m-1K-1, 100 mm diameter and 60 m length consisting 239 fins i.e. pitch of 250mm, a temperature drop of 20.5oC is observed with compared to a temperature drop of 17.7oC for the finless model.
Keywords: Computational fluid dynamics, Earth air heat exchanger, Heat transfer, Sink, Source.
[1] Svec O.J., Goodrich L. E. and Palmer J.H.L., Heat Transfer Characteristics of In-Ground Heat Exchangers, Energy Research 7, 1983, 265-278.
[2] Sodha M.S., Buddhi D. and Shawney R.L., Optimization of pipe parameters of an underground air pipe cooling system, Energy Conservation and Management 34 (6), 1993, 465-470.
[3] Krarti M. and Krieder J. F., Analytical model for heat transfer in an Underground air tunnel, Energy Conservation and Management 37 (10), 1996, 1567-1574.
[4] Misra R., Bansal V, Agarwal G. D., Mathur J and Aseri T. K., CFD analysis based parametric study of derating factor for earth air tunnel heat exchanger," Applied Energy 103, 2013, 266-277.
[5] Bansal V, Misra R., Agarwal G. D. and Mathur J, Derating factor a new concept for evaluating thermal performance of earth air tunnel heat exchanger: A transient CFD analysis, Applied Energy 102, 2013, 418-426.
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Paper Type | : | Research Paper |
Title | : | Fabrication and Development of Die for Powder Compaction Press |
Country | : | India |
Authors | : | Kamal Kumar Jangra || Tilak Raj || Neeraj Sharma |
Abstract: Development of die is one of the cumbersome tasks in the powder metallurgy process. In this research, some important points were discussed for the development of die and after that it is fabricated by the use of manufacturing processes. Mostly utilized manufacturing process is electric discharge machining and its variant like CNC wire cut electric discharge machine. Rough and trim cutting operations were utilized for the fabrication of die.
Keywords: Die development, Design, Fabrication, Powder compaction Press.
[1] A.K. Sinha, Powder Metallurgy, Dhanpat Rai Publications: New Delhi, 1987.
[2] P.Brewin, O. Coube, J.A. Calero, H. Hodgson, R. Maassen and M. Satur, Modelling and Powder die Compaction, Springer: Brewin, 2008.
[3] F. Klocke, Modern approaches for the production of ceramic components, J. Euro. Ceram. Soc., vol. 17, pp. 457–465, 1997.
[4] R.M. German, Powder Metallurgy Science, second ed., Metal Powder Industries Federation, Princeton, 1994.
[5] D.C. Zenger, H. Cai, Common causes of cracks in P/M compacts, Int. J. Powder Metall., vol. 34, pp. 33–52, 1998.
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Paper Type | : | Research Paper |
Title | : | Carbon Credit Earning Model for a University Based on Replacing 1 Star with 5 Star Air-conditioner: a Case Study |
Country | : | India |
Authors | : | Amit Sharma || Satpal |
Abstract: Controlled energy expenditure leads to saving in emission of CO2 in atmosphere. Members of society must be educated and informed about the means and ways by which our mother earth will be more livable and conserve our planet for our future generation. An academic institution can play a pivotal role in dissemination of knowledge and educating the society for accepting new energy efficient technologies and thus emission of green house gases can be checked. In this work a case study has been presented for an academic institution about achieving the CO2 mitigation on adopting the energy efficient air-conditioners. In this study, Deenbandhu Chhotu Ram University of Science and Technology Murthal, Haryana, India has been considered and in university 1 star air-conditioner (A/C) has been theoretically replaced with 5 star A/C and thus net reduction achieved in a green house gas (CO2) has been presented. It has been found that 161 tCO2 / year can be saved from emitting to the atmosphere by consuming less electrical energy. Work also highlight the economic viability of the study with the revenue generation model by selling carbon credits thus earned through Clean Development Mechanism (CDM) and it has been found out to be four lakh rupees per annum.
Keywords: Energy efficient air-conditioner; CO2 emission; Carbon credits.
[1] Ministry of Power, Power sectors at a glance All India-Total Installed capacity as on 31-1-2015. Available at www. powrmin.nic.in. [downloaded on 14 February,2015]
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Paper Type | : | Research Paper |
Title | : | Operational Analysis of Mining Equipment in Opencast Mine using Overall Equipment Effectiveness (OEE) |
Country | : | India |
Authors | : | V. M. Kalra || Tilak Thakur || B. S. Pabla |
Abstract: Man and Mining equipment work in highly polluted environment, where every individual undergovarious stressesfor improving equipment effectiveness and productivity of the mine. Mining equipment especially Shovel has undergone complex changes in terms of automation using sensors where the effective utilization of the equipment is still below the benchmark values,Mining companies are finding hard to survive due to high maintenance and production cost. Performance of the mining equipment is highly affected by unnoticed minor stoppages and idle equipment, in such cases it becomes significant tomeasure the performance of man and machines by effective tool known as Overall Equipment Effectiveness (OEE) for improving the Performance of the machines and Productivity of the mine.
Keywords: TPM, Availability, Performance, Utilization, Overall Equipment effectiveness (OEE).
[2] Anand S Relkar and K.N Nandurkar, Optimizing and Analysing Overall equipment Effectiveness (OEE) through Design of Experiments (DOE), Sciverse ScienceDirect,Procedia Engineering 38,(2012),2973-2980.
[3] Abdul Talib Bon,Lim Ping Ping and Berhanuddin Mohd Salleh,Asri Selamat, Evaluating total productive maintenance using Overall equipment effectiveness: fundamental study,Elixir Prod.Mgmt.36, (2011) 3293-3295.
[4] Sermin Elevli and Birol Elevli,Performance measurement of Mining Equipment by Utilizing OEE,Acta Montanistica Slovaca Rocnik, Cislo 2, 15(2010), 95-101.
[5] Ki-Young Jeong and Don T.Philips, Operational efficiency and effectiveness measurement, International journal of Operations and Production Management; (2001) Pg.1404.
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Paper Type | : | Research Paper |
Title | : | Evaluation of Free Vibration Characteristics of Cantilever Beams Made From Different Materials |
Country | : | India |
Authors | : | Hardeep Singh || Er. Sanpreet Singh || Dr. Gurpreet Singh |
Abstract: This paper focuses on the free vibration characteristics of cantilever beams. Now a day vibration is one of the most important areas of the research, because so many failures are occur due to excess vibrations in machines or any other field like construction etc, so that we measured the vibration and reduce it or control it. Vibration is the study of oscillatory motions. It is both useful and harmful for engineering systems. To control the vibration dampers are used but they posses internal damping due to that energy dissipate in to heat. Estimating Damping is a biggest challenge in materials. The objective of the study is to find out the Free Vibrations and natural frequency of cantilever beams which are made up from different materials (Aluminium, Stainless Steel, Mild Steel and Wood) and also find out their damping ratio,the vibration characteristics of an cantilever beam are find usingvibscanner and Accelerometer sensor. All the theoretical values are compared with experiment value and also find out percentage error between them.
Keywords: Accelerometer sensor, Cantilever Beam, Clamp, Damping ratio, Free vibration, Vibscanner.
[1] Pawar, R.S, Sawant, S.H., "An Overview of Vibration Analysis of Cracked Cantilever Beam with Non-Linear Parameters and Harmonic Excitations" International Journal of Innovative Technology and Exploring Engineering, 2278-3075, Volume-3, Issue-8, January 2014, pp. 53-55
[2] Chopade, J.P., Barjibhe, R.B. , "Free Vibration Analysis of Fixed Free Beam with Theoretical and Numerical Approach Method" International Journal of Innovations in Engineering and Technology, Vol. 2, Issue 1 ,February 2013, pp.352-356
[3] Singh, R., Sharma, M., Singh, V.P., "An Experimental Study of Vibration Control of Cantilever Beam Using Eddy Current Damper" International Journal of Applied Engineering Research, Vol.7 No.11, (2012), pp. 256-262.
[4] Cekus, D. "Free Vibration of A Cantilever Tapered Timoshenko Beam" Scientific Research of the Institute of Mathematics and Computer Science, Vol. 4, No.11, 2012, pp.11-17.
[5] S.S.Arora, Study of Vibration Characteristics of Cantilever beams of Different Material,Thaper University, Patiala July 2012
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Paper Type | : | Research Paper |
Title | : | Natural Fiber Reinforced Polypropylene Composites: A review |
Country | : | India |
Authors | : | Manpreet Singh Bahra || Lakshya Aggarwal || V.K.Gupta |
Abstract: Natural fiber reinforced composites, nowadays, are in great demand in industries because of their advantages such as low cost, biodegradability, acceptable mechanical properties and so on. Scientists and researchers prefer thermoplastic polymer matrix (polyethylene, polypropylene etc.) compared to thermosetting polymer matrix (epoxy, polyester, Bakelite etc.), reason being the low processing cost & high repair ability. Various natural fibers such as jute, flax, ramie, hemp, sisal, pineapple, cotton and many more are widely used as reinforcements in the polypropylene (PP) matrix and their mechanical properties were investigated by many researchers. Few of them are highlighted in the present paper.
Keywords: Biodegradable material, Fiber reinforced composites, Natural fiber, Polypropylene.
[1] Sam-Jung Kim, Jin- Bok Moon, Gue- Hyun Kim, Chang- Sik Ha, "Mechanical properties of polypropylene natural fiber composites: comparison of wood fiber and cotton fiber," Polymer testing 27, 2008, 801-806.
[2] Alireza Ashori, Amir Nourbaksh, "Preparation and characterization of polypropylene/wood flour/ nanoclay composites," J.Wood Prod. 69, 2010, 663-666.
[3] Yuqiu Yang, Tomoko Ota, Tohru Morii, Hiroyuki Hamada, "Mechanical property and hydrothermal aging of injection molded jute/polypropylene composites," J Mater Sci 46, 2011, 2678-2684.
[4] Silvia H.P Bettini, Marcela C. Antunes, Rodrigo Magnabosco, "Investigation on the effect of a compatibilizer on the fatigue behavior of PP/Coir fiber composites," Polymer engineering and science, 2011.
[5] Nadir Ayrilmis, Songklod Jarusombuti, Vallayuth Fueangvivat, Piyawade Bauchongkol, and Robert H. White, "Coir fiber reinforced polypropylene composite panel for automotive interior applications," Fibers and polymers ,Vol.12, No.7, 2011, 919-926.
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Paper Type | : | Research Paper |
Title | : | Experimental Study of the Green House Effect On Solar Cooker and Water Heater Integrated with PCM Materials (Paraffin Wax, Stearic Acid And Zinc Nitrate Hexahydrate) |
Country | : | India |
Authors | : | Taliv Hussain || Vikash Sharma || Amit Kumar Rai || Aman Keshari |
Abstract: As the environment is getting unbalanced constantly due to constant emission of green house gases and increasing prices of fuel, more and more people are turning towards renewable source of energy. Solar radiation is considered to be one of the cleanest and readily available sources of energy and because of the same, experimental study should be done on enhancing the effect of solar radiation directly on a solar cooker. In this experiment we are using Aluminum containers because of the good conductive property of aluminum. A glass case is used to produce the Green house effect. Copper tube is used for the heating for water. PCM (Phase Change Materials) that are used are Paraffin Wax, Stearic Acid and Zinc Nitrate Hexahydrate and the food materials that are used are Rice, Mung Beans and Bulgur (Dalia). It is observed that using the Glass Case (Green house effect) results into saving a significant amount of time in cooking, in other words using Green house effect results into much faster cooking rate as compared to while not using green house effect. The time( minutes) taken by different PCM materials without using the glass case is as follows => Paraffin Wax : Rice(106)>Mung Beans(76)>Bulgur(54) ; Stearic Acid : Rice(101)>Mung Beans(92)>Bulgur(59) ; Zinc Nitrate Hexahydrate : Rice(121)>Mung Beans(104)>Bulgur(58), and the time ( minutes) taken while using the glass case are as follows => Paraffin Wax : Rice(91)>Mung Beans(68)>Bulgur(50) ; Stearic Acid : Rice(94)>Mung Beans(85)>Bulgur(52) ; Zinc Nitrate Hexahydrate : Rice(105)>Mung Beans(92)>Bulgur(44). This concludes that using Green House effect is more beneficial as compared to using solar cooker solely.
Keywords: Solar cooker, Green house effect, Phase change material
[1] Buddhi, D., Sahoo, L.K. . Solar cooker with latent heat storage: Design and experimental testing. Energy Conversion and Management 38 (5), 493–498.
[2] Buddhi, D., Sharma, S.D., Sharma, A. Thermal performance evaluation of a latent heat storage unit for late evening cooking in a solar cooker having three reflectors. Energy Conversion and Management 44, 809–817.
[3] Domanski, R., El-Sebaii, A.A., Jaworski.Cooking during off-sunshine hours using PCMs as storage media. Energy 20 (7), 607–616.
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Paper Type | : | Research Paper |
Title | : | Effect of Vibration on Heat Transfer Enhancement in a Rectangular Channel Heat Exchanger |
Country | : | India |
Authors | : | Chatter Pal Saini || Sandeep Kumar |
Abstract: Heat transfer characteristics in a horizontal rectangular heat exchanger with five triangular baffles inclined at fixed angle of 20o along the channel are investigated experimentally. The same heat exchanger is also investigated with use of vibration. The experiment is done on three different vibration intensities. Effects of different vibration intensities on heat transfer are observed and compared with different heat transfer characteristics like overall heat transfer coefficient, effectiveness and heat transfer rate in absence of vibrations. It is found that with increase in vibration intensities, heat transfer characteristics can be improved to some extent.
Keywords: Heat Transfer Enhancement, Rectangular Channel, Triangular Baffles, Vibration Intensity.
[1] Thundil Karuppa Raj, R., Shell side numerical analysis of a shell and tube heat exchanger, Thermal Science, vol. 16, 2012, 1165-1174.
[2] P. Sriromreun, C. Thianpong and P. Promvonge, Experimental and numerical study on heat transfer enhancement in a channel with z-shaped baffles, International Communications in Heat and Mass Transfer, vol. 39, 2012, 945-952.
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Paper Type | : | Research Paper |
Title | : | Erosion Behaviour of Stainless Steel Grade-316 |
Country | : | India |
Authors | : | Sourabh Dhawan || Harinder Singh || Ranjit Singh |
Abstract: Erosion of the hydro turbine steels is a serious issue, especially for the hydro power plants situated on the rivers. In the current investigation, slurry erosion performance of stainless steel (Grade-316), which is commonly used in hydro-turbine power plants has been studied. Silica sand is used as the abrasive media in the test apparatus.Three parametershave been selected to study the performance of stainless steel, which majorly observed under practical conditions. The effect of slurry concentration (ppm), average size of slurry particles (μm) and rotational speed (rpm) on the slurry erosion behaviour of selected material was investigated under different experimental conditions.
Keywords: turbine , steel grade -316, Slurry erosion, TAGUCHI
[1]. Bhandari, S., Singh, H., Kumar, H., & Rastogi, V. (2012). Slurry Erosion Performance Study of Detonation Gun-Sprayed WC-10Co-4Cr Coatings on CF8M Steel Under Hydro-Accelerated Conditions. Journal of Thermal Spray Technology, 21, 1054-1064.
[2]. Kumar, A., Sapra, P. K., & Bhandari, S. (2011). A Review Paper on Slurry Erosion of Plasma And Flame Thermal Sprayed Coatings. In Proceedings of the National Conference on Advancements and Futuristic Trends in Mechanical and Materials Engineering.
[3]. Kruger, S., & Martin, N. (2010). Assessment of Wear Erosion on Pump Impeller. In Proceeding of the twenty sixth international pump user symposium, pp. 51-56.
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Paper Type | : | Research Paper |
Title | : | Experimental Study of Improving the COP of VCRS system by using Single and Double Cellulose pad in Cooling Tower |
Country | : | India |
Authors | : | Rahul Wandra || Taliv Hussain || Gourav Roy || Rahul Thukral |
Abstract: In subtropical region where the outside climate air is humid and hot. Here water cooled condenser system is more effective as compared to air cooled condenser system. As the standard VCRS (water cooled condenser) approach practical limits, experimental modification should be performed to increase the system efficiency and capacity. One possible mean to increase the COP of VCRS (water cooled condenser) is by using cooling tower. Cooling tower consist of single or double thickness cellulose pad within the system. Related studied focus on to improve the COP of VCRS system. Here the cooling tower performance is improved due to good water wet ability of cellulose pad that cause a uniform water circulation over the entire surface of pad and a perfect contact between water and cooling air. A VCRS (water cooled condenser) has been built attached with a cooling tower consist of two different same thickness cellulose pad. In first case when single pad 2inch thickness is used in cooling tower at two different ambient temperatures 27°C and 30°C.The COP changes from 4.93 to 4.68 as ambient temperature increase. Similarly in second case when double pad of same 2inch thickness is used in cooling tower COP change from 5.15 to 4.98 as move from 27°C to 30°C.
Keywords: Water cooled condenser, Cooling tower, vapour compression refrigeration system, evaporative cooling pad.
[1] S.S. Hu, B.J. Huang, "Study of a high efficiency residential split water-cooled air conditioner", Applied Thermal Engineering 25 (2005) 1599–1613
[2] Experimental Investigation of A Domestic Refrigerator Having water cooled condenser using various compressor oils, Sreejith K, Assistant Professor, Dept.Of Mechanical, Research Inventy: International Journal Of Engineering And Science, Vol. 2, Issue 5 (February 2013), Pp 27-31
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Paper Type | : | Research Paper |
Title | : | Pressure Drop Analysis of Water and Bottom Ash Mixture Flow Through Straight Pipeline With Additive |
Country | : | India |
Authors | : | Subhash Malik || Naveen Saini || Jagdeep Singh |
Abstract: All the available coals have some percentage of ash. When the coal is burnt about 10 to 20% of quantity of coal used results in ash. In the modern large steam power plants where huge amounts of coal are used, the amount of ash may be go up to many thousands tonnes of ash per year. A slurry transport system is used to disposal the coal ash away from coal burning unit in thermal power plant. Bottom ash slurry is pumped from the common ash slurry sump to the dyke area which is located near slurry pump house. Water and bottom ash are mixed in slurry tank, after that slurry transportation takes place in slurry pipeline with the help of slurry pump. Computational simulation is performed on the slurry flow through pipeline for the analysis of pressure drop. When fluid flows through a pipe, it is subjected to hydraulic resistances which are of viscous frictional resistance and local resistance. Viscous frictional resistance associated with the fluid flow is called major loss of energy. Pressure drop can be reduced in pipe flow by mixing the additive in slurry. Local resistances are essentially due to change of velocity either in magnitude or direction. Modelling of pipeline is developed in Gambit and Fluent is used for the numerical evaluation. Computational simulation has been performed on various concentrations and flow velocities.
Keywords: Computational Fluid Dynamics, Finite Volume Method, Slurry Transportation System
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[2] Zeki Aktas, E.Ted Woodburn [2000] "Effect of addition of surface active agent on the viscosity of a high concentration slurry of a low-rank British coal in water", Fuel Processing Technology, Vol-62, pp. 1–15.
[3] Hiromoto Usui, Lei Li and Hiroshi Suzuki [2001] "Rheology and pipeline transportation of dense fly ash-water slurry", Korea-Australia rheology journal, Vol- 13, pp. 47-54.
[4] E. Harmadi, Suwarmin, S. Machmudah, and S. Winardi [2002] "Effect Of Particle Size Distribution On Rheology And Stability Of High Concentration Coal-Water Mixture (Cwm) With Indonesian Low Rank Coal", Jurnal teknik mesin, Vol-2, pp. 3-98.
[5] F. Boylu, H. Dinc¸er, G. Atesok[2003] "Effect of coal particle size distribution, volumefraction and rank on the rheology of coal–water slurries", Fuel Processing Technology, Vol-85, pp. 241–250.
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Paper Type | : | Research Paper |
Title | : | Exergy Analysis of R134a Based Vapour Compression Refrigeration Tutor |
Country | : | India |
Authors | : | Pooja Yadav || Amit Sharma |
Abstract: The paper presents the exergetic analysis of actual vapor compression refrigeration cycle. System discussed is R134a based vapour compression refrigeration tutor. Paper discusses the component's exergetic destruction and cycle's exergetic efficiency.
Keywords: Coefficient of performance; Exergy destruction; Exergetic efficiency
[1] B. O. Bolaji, "Exergetic Performance of a Domestic refrigerator using R12 and its Alternative Refrigerants," Eng. Sci. Technol., vol. 5, no. 4, pp. 435–446, 2010.
[2] O. L. Protection, O. Science, C. I. O. Substances, C. I. Substances, T. Area, and C. Name, "Class I Ozone-depleting Substances," 2014. [Online]. Available: Class I Ozone-depleting Substances Science Ozone Layer Protection %. [Accessed: 11-Jul-2014].
[3] B. Tashtoush, M. Tahat, and M. A. Shudeifat, "Experimental study of new refrigerant mixtures to replace R12 in domestic refrigerators," vol. 22, pp. 495–506, 2002.
[4] X. Xu, "Exergy Analysis on a Vapor Compression Refrigerating System Using R12 , R134a and R290 as Refrigerants," Refrig. Air Cond., 1992.
[5] V. M. V. Padmanabhan and S. K. Palanisamy, "Exergy efficiency and irreversibility comparison of R22, R134a, R290 and R407C to replace R22 in an air conditioning system," J. Mech. Sci. Technol., vol. 27, no. 3, pp. 917–926, Mar. 2013.
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Paper Type | : | Research Paper |
Title | : | An Experimental and CFD Analysis of CuO-H2O (DI) Nanofluid Based Parabolic Solar Collector |
Country | : | India |
Authors | : | Ketan Ajay || Kundan Lal |
Abstract: Parabolic solar collectors have been used for producing power in solar thermal power plants. Nanofluids in solar energy, when used as a working fluid in parabolic collector enhances its efficiency due to its improved thermo-physical properties like thermal conductivity, heat capacity , density and viscosity. Nnaofluids is a suspension of nanoparticles in a base fluid like water, ethylene glycol. In this paper both experimental and computational fluid dynamics study has been presented. Nanofluid used is 0.01% CuO- H2O (DI). System performance is conducted under mass flow rate of 20 Litres/hr In ANSYS FLUENT 14.5 based computational fluid dynamics tool, the absorber tube is modeled as metallic copper tube with working fluid flowing in it. Solar load model has been used for modeling solar fluxes. S2S radiation model has been used for modeling heat transfer comprising of conduction, convection and radiation. It has been reported from both experimental and CFD analysis that system performance is enhanced by using nanofluid as working fluid as compared with conventional fluid like water. Also both experimental and CFD simulated results are in good agreement.
Keywords: Computational fluid dynamics, efficiency, nanofluid, parabolic solar collector, performance.
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Paper Type | : | Research Paper |
Title | : | Surface Integrity Analysis of Machined Surface After Rough Cutting Operation In Wedm |
Country | : | India |
Authors | : | Vinod Kumar || Vikas Kumar || Kamal Kumar |
Abstract: WEDM process removes the work-materials by a series of electrical sparks between the workpiece and wire electrode. These sparks generate craters, recast layers and heat-affected zones on the subsurface of the machined workpiece. Machined surface with poor surface integrity is a major disadvantage of WEDM. After rough cutting operation in WEDM, some surface area remains uncleared on work surface in intricate machining such as in die making. This paper presents a study of uncleared materials named as surface projection, in die making after rough cut in WEDM. Using SEM images, length of uncleared surface projections have been measured. Results show that level of discharge energy is greatly influence the surface projections made on machined surface.
Keywords: Nimonic 90, Wire Electrical Discharge machining (WEDM), Discharge energy, scanning electron microscope (SEM).
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