EXPERIMENTAL STUDY ON THE BEHAVIOUR OF CONCRETE IN REPLACEMENT OF CEMENT WITH PULVERISED FUEL ASH (COAL ASH) AND LIMESTONE POWDER
Authors: G.B. SANTHOSH KUMAR
Abstract
At the outset, I thank the lord almighty, parents and teachers for giving me knowledge, strength, encouragement, and determination not only in pursuing this task but also in all works of my life
A system of computer with Preventive maintenance over H/w and S/w subject to maximum operation time
Authors: Anju Dhall
Abstract
This paper analyzed a system of computer with component-wise redundancy with independent failures of software and hardware. There are two units-one primarily operative and other reserved as hardware cold standby. After determined operation time, by conducting precautionary conservation of hardware unit, there are two possibilities that is operative unit undergoes for software up gradation with some probability while other possibility for hardware unit after independent failures. A single server is available instantly to provide the services like repairs of hardware, software components and preventive maintenance. The system is in good state after repair. The different failures of system follow exponential distribution whereas others are arbitrary. Regenerative Point Graphical Technique (RPGT) with semi-Markov process is used for finding the consistency and other strictures of the system speedily and easily. The derived expressions like mean time to system failure (MTSF), availability of the system, different busyness of system and the number of visits of the server are shown graphically.
Retrofitting thermal performance of building envelope and extension of Secha Sadan, Bhubaneswar
Authors: Ar. Surya Prakash B, Ar. Archana S, Ar. Aravind, Priya Dharsini E
Abstract
The built environment is responsible for 40% of the global energy demand. Efforts are to be made in existing buildings, namely in office buildings, which are statistically more energy consuming than residential buildings. One of the main components of achieving a more sustainable built environment is to improve the performance of the existing building stock by retrofitting to increase the energy efficiency and improve quality of life (Low Carbon Innovation Coordination Group 2012). The retrofit of building envelope can help in saving 50–60% of the buildings’ energy consumption used for HVAC purposes. Secha Sadan is a 50 year old government office building in Bhubaneswar. Proposing a building envelope retrofitting for this structure will not only help in reducing the energy consumption of this structure but would also shed light on how this can be implemented in other such existing government office buildings in Bhubaneswar. The existing envelope has been documented and analyzed using U-Value calculations and simulation softwares like OPAQUE and Form it. A number of envelope retrofitting techniques have been studied and shortlisted through literature, desktop and case studies to propose the best strategies. It was found that 40% savings can be achieved by the retrofit strategy implemented. Also the live proposal of an extension of the existing block to accommodate a new division has been taken into consideration. An attempt has been made to design this block appropriately keeping in mind the required thermal performance standards.