Entity

Time filter

Source Type


Narayana S.M.V.,Vaagdevi Institute of Technology and Science | Kumara Swamy N.,Akshya Bharathi Institute of Technology
Journal of Structural Engineering (Madras) | Year: 2010

Accidental fires quite often occur in domestic buildings, function halls, commercial complexes, industries, furnaces etc. During fire accidents, concrete is subjected to elevated temperatures and after the fire is extinguished by water, it undergoes immediate cooling effect To endure all these effects, the concrete must be resistant to elevated temperatures. Conventional OPC concrete is not so effective in resisting elevated temperatures. To improve further the temperature resistance of flyash concrete, in the present investigation, microfine heavy weight inert filler is added to flyash concrete and the residual compressive strength of concrete at elevated temperatures ranging from 100°C to 300°C has been studied. The flyash concrete with microfine barytes filler shows more resistance to elevated temperature at all temperatures and duration of temperatures in hot, immediately water cooled and air cooled conditions. Source


Narayana S.M.V.,Akshya Bharathi Institute of Technology | Kumara Swamy N.,Vaagdevi Institute of Technology and Science
Journal of the Institution of Engineers (India): Civil Engineering Division | Year: 2010

Most of the investigations carried out to find the water permeability of concrete were done using equipment that was time consuming and costly. In concrete with pozzolans or supplementary cementing materials the pozzolanic action continues fora long time. In such cases, when conventional method of water permeability is carried out, during the saturation of the concrete specimen, the microstructural changes may take place. This may lead to inconsistent results. It may not be possible to find out the water permeability of concrete at a particular age owing to the long duration of test period. For testing durability properties of concrete quick and reliable testing methods are necessary. Permeability is an important property with regard to the durability of concrete. In the present investigation, an attempt is made to find out the water permeability of concrete using a novel and portable equipment. Applying 1 MPa or 10 bar or 100m head pressure for 48 h, the penetration depth of water was found and using the depth of penetration of water, the coefficient of permeability was found. The results obtained are consistent and practical. Source


Visali N.,JNTUACEP | Reddy M.S.,Vaagdevi Institute of Technology and Science | Reddy M.S.K.,JNTUACEP
2014 International Conference on Advances in Electrical Engineering, ICAEE 2014 | Year: 2014

In present days with increasing in load demand and with large interconnection of various networks it is essential to operate generating stations optimally within its constraints. Otherwise the price for the cost of generation increases. So it is very much essential to reduce the cost of generation. The cost of generation mainly includes running cost of generation ie., fuel cost with respect to thermal & nuclear power stations. Also the major economic factor in power system planning, operation and control is with the cost of generating real power. In this paper, the main objective is to minimize the cost of real power generation by optimal allocation of generating units to load demand subjected to equality and inequality constraints. The optimum generation scheduling plays an extremely important role in optimal operation of power system. To obtain economic scheduling, a method is proposed based on lambda iterative approach using Differential Evolution programming. The Economic Dispatch (ED) is to minimize the operating fuel cost while satisfying the load demand and operational constraints. The analysis is carried out with inclusion of transmission losses and the results are presented. The proposed method is tested with two sample systems by considering various load demands. The numerical results have shown the performance and applicability of the proposed method. Also the results obtained by the proposed method are compared with the existing methods. © 2014 IEEE. Source


Reddy B.S.,Vaagdevi Institute of Technology and Science | Sukumar Reddy S.M.K.,Vaagdevi Institute of Technology and Science | Rahaman S.T.,Sri Venkateswara Institute of Science and Technology
Proceedings of the IEEE International Caracas Conference on Devices, Circuits and Systems, ICCDCS | Year: 2014

This paper describes the design for correcting errors in asynchronous global communication. These are unordered delay insensitive (DI) codes and uses four-phase return-to-zero protocol, as it provides simple and fast implementation and they are widely used. This paper provides 1-bit and also 2-bit error correcting methods. Two bit error correction coverage is up to 55%-70%, providing better or comparable coding efficiency. Designs given build on prior work of [1] and this paper proposes a small modification to their work. Practical implementation for 1-bit and 2-bit error correcting method is also provided by using Xilinx tools. Parity generator and checker are used for multiple error detection. This paper provides a novel completion detector with reduced area overhead. These codes were simulated using modelsim tool version 10.2b and implemented in Xilinx spatran3 FPGA. © 2014 IEEE. Source


Visali N.,JNTUACEP | Visali N.,Vaagdevi Institute of Technology and Science | Reddy S.,JNTUACEP | Reddy S.,Vaagdevi Institute of Technology and Science | And 2 more authors.
Journal of Electrical Engineering | Year: 2014

In present days with increasing in load demand and with large interconnection of various networks it is essential to operate generating stations optimally within its constraints. Otherwise the price for the cost of generation increases. So it is very much essential to reduce the cost of generation. The cost of generation mainly includes running cost of generation ie., fuel cost with respect to thermal &nuclear power stations. Also the major economic factor in power system planning, operation and control is with the cost of generating real power. In this paper, the main objective is to minimize the cost of real power generation by optimal allocation of generating units to load demand subjected to equality and inequality constraints. The optimum generation scheduling plays an extremely important role in optimal operation of power system. To obtain economic scheduling, a method is proposed based on lambda iterative approach using Differential Evolution programming. The Economic Dispatch (ED) is to minimize the operating fuel cost while satisfying the load demand and operational constraints. The analysis is carried out with inclusion of transmission losses and the results are presented. The proposed method is tested with two sample systems by considering various load demands. The numerical results have shown the performance and applicability of the proposed method. Also the results obtained by the proposed method are compared with the existing methods. Source

Discover hidden collaborations