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Das, Suman
- An Experimental Study of Grinding Performances of a Mild Steel under Different Environmental Conditions using Various Types of Nozzles
Abstract Views :391 |
PDF Views:126
Authors
Affiliations
1 Department of Mechanical Engineering, Jalpaiguri Government Engineering College, Jalpaiguri- 735102, IN
1 Department of Mechanical Engineering, Jalpaiguri Government Engineering College, Jalpaiguri- 735102, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 17 (2018), Pagination: 48-56Abstract
Grinding is a mechanical metal removal process used in manufacturing industries. In this process, the material is removed from a work-piece material by an abrasive wheel. This process gives better surface finish and close tolerance. Grinding process removes material by shearing, ploughing, rubbing and brittle fracture with high- speed and a high input of energy per unit volume. The coolant or grinding fluid is used to reduce the temperature in grinding zone and also it is used as a lubricant into grinding zone. In present work, a five port multi-nozzle system has been developed and performance of this nozzle has been compared with flood type copper cooling nozzle under different environmental conditions. Two parameters (chip characteristics, surface roughness) of grinding are considered to find the suitable process for grinding of a mild steel specimen. From this experimental investigation, it can be observed that in wet condition, five port multi-nozzle system provides better surface finish as well as it is more economical.Keywords
Five Port Multi-nozzle, Surface Roughness, Depth of Cut, Grinding, Chip, Dry Test.Full Text
References
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- Das, S., Improving Grinding Performance through Appropriate Grinding Fluid Application, Proceedings of the National Conference on Investment Casting, Durgapur, India, pp.97-103, 2003.
- Mandal, B., Majumdar, S., Das, S. and Banerjee, S., Formation of a Significantly Less Stiff Air Layer around a Grinding Wheel with a Rexine Leather Pasted Wheel, International Journal of Precision Technology, Vol.2, No.1, pp.12-20, 2011.
- Mandal, B., Singh, R., Das, S. and Banerjee, S., Improving Grinding Performance by Controlling Air Flow around a Grinding Wheel, International Journal of Machine Tools and Manufacture, Vol.51, No.9, pp.670-676, 2011.
- Mandal, B., Biswas, D., Sarkar, A., Das, S. and Banerjee, S. Grinding Performance Using a Compound Nozzle Characterized by Small Discharge of Fluid, Journal of the Association of Engineers, India, Vol.83, No.1, pp.28-35, 2013.
- Concentrated Solar Thermal Power Plant with Multi-PCM Reservoirs for Electrical Power Generation-An Idea
Abstract Views :315 |
PDF Views:121
Authors
Affiliations
1 Mechanical Engineering Department, Jalpaiguri Government Engineering College, Jalpaiguri, IN
1 Mechanical Engineering Department, Jalpaiguri Government Engineering College, Jalpaiguri, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 17 (2018), Pagination: 57-65Abstract
Global warming is one of the most alarming threats to the whole world. A very large quantity of energy source which reaches the earth is solar energy. But the big challenge to scientists and the engineers is to store and convert this energy in the form of thermal or electrical energy. In solar power plants, the energy of the Sun is used to produce electricity. Such a plant can run only in the daytime, but if it is possible to store solar energy then it can also be used at night time. Time-dependence is the major problem of the solar thermal power plant. Thermal energy storage (TES) technology can store energy by using Phase change material (PCM) to overcome this difficulty. One viable option is the use of PCM materials that provide an efficient way of storing such energy. Initially, PCM remains in solid-state; it absorbs heat and melts into the liquid state. At night time, it releases heat and changes back to solid-state. In this work, concentrated solar power (CSP) technology, is used considering its higher efficiency. The use of PCM as latent heat storage is very effective. Three-phase change material reservoirs of different melting points have been used in series. Thermodynamic analysis has been done to find out the optimum mass flow rate of the heat transfer fluid from the low- temperature PCM reservoir. All the processes have been considered ideal.Keywords
Thermal Energy Storage (TES), CSP Plant, Phase Change Material (PCM), Thermodynamic Analysis.Full Text
References
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- Schnatbaum, L., Solar thermal power plants, The European Physical Journal Special Topics, Vol. 176, pp. 127-140, 2009.
- Lovegrove, K., Watt, M., Passey, R., Pollock, G., Wyder, J. and Dowse, J., Realizing the potential of concentrating solar power in Australia, IT power Australia, Australian Solar Institute, pp. 2-273, 2012.
- Barlev, D., Vidu, R. and Stroeve, P., Innovation in concentrated solar power, solar Energy Materials and Solar Cells, Vol. 95, No.10, pp. 2703-2725, 2011.
- Concentrating Solar Power Projects, National Renewable Energy Laboratory, https://www.degruyter.com/view/journals/nleng/8/1/article-p10.xml, published online: May 22 2018.
- Jankowski, N.R. and McCluskey, F.P., A review of phase change materials for vehicle component thermal buffering, Applied Energy, Vol. 113, pp. 1525-1561, 2014.
- Atkin, P. and Farid, M.N., Improving the efficiency of photovoltaic cells using PCM infused graphite and aluminum fins, Solar Energy, Vol. 114, pp. 217-228, 2015.
- Roman, K.K., O'Brien, T., Alvey, J.B. and Woo, O., Simulating the effects of cool roof and PCM (phase change materials) based roof to mitigate UHI (urban heat island) in prominent US cities, Energy, Vol. 96, pp. 103-117, 2016.
- Fukahori, R., Nomura, T., Zhu, C., Sheng, N., Okinaka, N. and Akiyama, T., Macro-encapsulation of metallic phase change material using cylindrical-type ceramic containers for high temperature thermal energy storage, Applied Energy, Vol. 170, pp. 324-328, 2016.
- Kenisarin and Murat, M., High-temperature phase change materials for thermal energy storage, Renewable and Sustainable Energy Reviews, Vol. 14, pp. 955-970, 2010.