http://nopr.niscair.res.in/handle/123456789/5178 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/5407 Title: Development of an ingenious composite roll system for merchant mill <br/> <br/>Authors: Roy, Shibendu Shekhar; Mukherjee, Narayan Prasad; Mukhopadhyay, Subhendu; Sarkar, Hemendra Nath <br/> <br/>Abstract: A recent international trend is to improve performance of rolls for use in wire, rod, and bar mills and upgrade the quality of rolled products. Further, attempts are being made to replace the existing mono-block system of roll by a composite roll. In composite roll design, toughened and shock resistant arbor is used as the basic module on which a hardened and wear resistant rolling ring is securely clamped in proper place with the help of a suitable locking device. In the present work, an attempt is made to design and develop a composite ring roll system such that the roll assembly becomes dimensionally as well as functionally same as a conventional mono-block roll system. The friction lock mechanical shrink fit device proposed in the composite roll system, has been developed based on the basic principle of friction lock. Torque is transmitted by friction between the contact surfaces of locking system, roll shaft and rolling ring, resulting from tightening of the screws. A scale down model of a composite roll is developed and tested thoroughly to assess its torque transmitting capacity. The results demonstrate the feasibility of a composite roll. <br/> <br/>Page(s): 80-83 Mon, 29 Dec 2003 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/5406 Title: Extraction of zinc(II) using liquid membrane and performance optimization using response surface methodology <br/> <br/>Authors: Lakshmi, D Shanthana; Muthukumar, M; Mohan, D <br/> <br/>Abstract: Zinc(II) was transported selectively from the feed compartment to the stripping compartment through the flat sheet supported liquid membrane loaded with 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester (Ionquest801-IQT801) in kerosene. The effects of feed phase pH (1.5-3.0), carrier concentration (5-20 per cent) and stripping agent concentration (0.3-1.3<i style="">M</i>) were studied using flat sheet supported liquid membrane (FSSLM) and the enrichment factor values were calculated. Second order polynomial regression was used for analysis of the experiment. The experimental values were in good correlation with predicted values and the high correlation coefficient obtained proved the fitness of the selected model. <br/> <br/>Page(s): 74-79 Mon, 29 Dec 2003 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/5403 Title: Design of temperature and pressure control logic for coal fired fluidized bed boiler on DCS <br/> <br/>Authors: Gupta, Sanjeev <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> The paper deals with control logic’s developed for compartments-1 and 2 according to temperature and pressure limits that exist in coal fired fluidized bed boiler-5 of captive power plant. The control logics have been implemented on-line by using the capabilities of TDC-3000 DCS supplied by Tata Honeywell, Pune, India. The ranges of temperature and pressure have been studied for the optimum utilization of the fluidized bed boiler. The operation of logics and its implementation are also discussed. This has helped in reducing the coal consumptions, which has improved the overall productivity. </smarttagtype></smarttagtype></smarttagtype> <br/> <br/>Page(s): 68-73 Mon, 29 Dec 2003 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/5402 Title: Biodiesel production from Karanja oil <br/> <br/>Authors: Vivek; Gupta, A K <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Import dependence for oil in India, which is about 70 per cent, is likely to increase further. The study is initiated to investigate the potential of Karanja oil as a source of biodiesel. Biodiesel is an alternative fuel made from renewable biological resources such as, vegetable oil and animal fat. It is completely biodegradable and non-toxic. Main objectives of the study are feasibility of Karanja oil for the production of biodiesel, optimization of different parameters for high yield/conversion of Karanja oil to biodiesel. Optimum conditions were found to be: Pressure 1 atmos, Temperature 68-70 ^oC, Reactant ratio 8-10 (Moles of MeOH: Moles of oil), Reaction time 30-40 min, Catalyst (KOH) 1.5 per cent w/w. Tests were also conducted to compare the biodiesel with diesel fuel in terms of engine performance and emissions. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 39-47 Mon, 29 Dec 2003 22:58:59 GMT