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Ramanathan, S.
- A Calorimetric Study of Ti-6AL-4V Alloy
Abstract Views :793 |
PDF Views:150
Authors
Affiliations
1 Department of Mechanical Engineering, Annamalai University, IN
2 Department of Manufacturing Engineering, Annamalai University, IN
3 Thermal Systems Group, ISRO Satellite Centre, Bangalore, IN
1 Department of Mechanical Engineering, Annamalai University, IN
2 Department of Manufacturing Engineering, Annamalai University, IN
3 Thermal Systems Group, ISRO Satellite Centre, Bangalore, IN
Source
Indian Journal of Science and Technology, Vol 6, No 4 (2013), Pagination: 4262-4267Abstract
Ti-6Al-4V titanium alloy is widely used in industrial applications such as aeronautic and aerospace due to its good mechanical properties at high temperatures. The aim of the work is to determine the heat capacity of the thermal cycled titanium alloy. The cylindrical specimens of dimension 3 ± 0.1 mm in diameter and 2.5 ± 0.1 mm in length were machined from the CNC machine. The specimens were subject to two different types of heat treatments (Solution treated and annealed). First type of heat treatment (annealing) is processed by heating the specimen to a temperature of 7500°C for 4 hours and it is cooled in the furnace to reach the atmospheric temperature. Second type of heat treatment (solution treating) is processed by the specimen is heated to a temperature of 975°C for 1 hour and it is quenched in a solution containing water with 5% of caustic soda. After quenching (delay of 6 second), aging was done at 450° C for 4 hours and then it is furnace cooled to reach atmospheric temperature The heat treated specimens were thermal cycled in a specially designed thermal cycling apparatus for different cycles heat flow and the flow of energy into or out of the sample as a function of temperature was measured by using Differential Scanning Calorimetry (DSC). The heat flow response is recorded as a function of actual sample temperature range from -120° C to 380° C. The measurements of the heat capacity by DSC with an accuracy of ±2% have been reported. This study restrict the use of DSC as a truly quantitative calorimetric technique and concentrates mainly on the practical set of experimental heat capacity data measured over a temperature range for different aerospace materials being used/developed indigenously for the Indian Space Programme.Keywords
Thermal Analysis, Differential Scanning Calorimeter, Specific Heat, Heat TreatmentFull Text
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- Simulation of Controllers for AC Microgrid
Abstract Views :141 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical and Electronics Engineering, SRM University, Chennai – 603203, Tamil Nadu, IN
1 Department of Electrical and Electronics Engineering, SRM University, Chennai – 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objective: To design controllers for AC micro grid. To improve battery span, fuzzy control and energy management control the charging and discharging mode of the battery. Methods: A fuzzy controller can be used for the control of battery SOC of the renewable hybrid system and Energy Management Control is also used as above and to improve the performance of the system. Findings: The wind, solar hybrid power system plays a vital role today in renewable energy resources because it uses solar and wind power combined to create a stand-alone energy source that is both dependable and reliable. Conventional approach cannot provide with best way of energy management due to its non-linearity of battery charging process. So modern controllers are used in micro grid for battery SOC control. Improvement: In this work both fuzzy logic controller and EMC system is used for the hybrid system modeled using solar, wind and fuel cell system.Keywords
Energy Management System, Fuzzy Logic Control, State of Charge.Full Text