S. Rajakumar

Anna University Regional Campus, Tirunelveli · Mechanical Engineering

The problem of water scarcity is increasing day by day due to various causes such as polluting the environment, urbanization, climate change due to the heavy usage of fossil fuels, less awareness in storing the water when it is available, etc. However, in seashore areas, the availability of fresh drinking water is very low. This demand motivated to...

The purpose of this research is to identify the best Blunt Body (BB) configuration for a piezoelectric wind energy harvesting system. The bluff body configurations studied are square, trapezoid, cone, cylinder, and aerofoil which are experimented on the rectangular and triangular cantilever beam. The increase in displacement and vibration velocity...

In this study, a 2 kW small scale horizontal axis wind turbine with rotor radius of 1.8 m and Tip Speed Ratio of 6 was designed to work at low wind speed for rural applications. Aerodynamic analysis was performed on 10 airfoils, viz Aquila, BW-3, E387, FX63-137, NACA0012, NASA LS-0413, RG-15, S1223, SD7080 and SG6043 using QBlade software. These ai...

Piezoelectric elements are inevitable in modern day physics playing a vital role in many applications. Any piezoelectric element requires compression to produce energy in the form of a weak electrical ac signal. Mechanical vibrations are known to cause deflections which are enough to produce energy from the piezoelectric materials. In this paper, a...

The objective of this work is to develop a low cost composite natural fiber material for the application of improving the energy efficiency of building and also to improve the building cooling effect. This work involves investigation of the thermal properties of Natural fiber composite which is used to reduce heat transfer into the building. The se...

Exhaust gas re-circulation is a method used in compression ignition engines to control and reduce NOx emission. These emissions are controlled by reducing the oxygen concentration inside the cylinder and thereby reducing the flame temperature of the charge mixture inside the combustion chamber. In the present investigation, experiments were perform...

In this paper the thermal comfort condition for mushroom cultivation was studied. In addition to this the design and fabrication of photo voltaic refrigeration system for mushroom cultivation was determined. Mushroom cultivation was done by so many peoples in the hot and dry climatic places. In the cold places the yield of mushroom was more compare...

In the design of a wind turbine, the goal is to attain the highest possible power output under specified atmospheric conditions. The optimization of power coefficient of horizontal axis wind turbine has been carried out by integration of blade element momentum method and genetic algorithm (GA). The design variables considered are wind velocity, ang...

In this paper two methods developed to reduce the outlet water temperature of the cross flow cooling tower in DCW limited. Due to reduction of the outlet water temperature the cooling range will be increased and it also leads to the increase the efficiency of the overall power plant. The first method deals with the water path cooling. The decrease...

In this paper the cross flow cooling tower in DCW Limited was studied. The performance factors of the cooling tower analyzed by experimental data's and the thermodynamic analysis of it by using the first law of thermodynamics is carried out. Mathematical model based on heat and mass transfer principle is solved using stepwise integration method. Th...

Air conditioning system is necessary in automobile to maintain the comfort condition. Therefore it is important to study transient response of vehicle under real driving conditions. The Heat Balance Method (HBM) is used for estimating the heating and cooling loads which develops inside the vehicle cabin. The Load Calculation of Automobile Air Condi...

In this paper the thermal comfort condition for mushroom cultivation was studied. In addition to this the cooling load needed for bring that thermal comfort condition was calculated. Mushroom cultivation was done by so many peoples in the hot and dry climatic places. In the cold places the yield of mushroom was more compared with the cold climatic...

Wind energy is innately renewable, abundant in the earth and can possibly reduce the dependency on fossil fuels. Wind is an incarnation of sun and is always nourished by the latter. Approximately 10 million MW of energy can be continuously generated from the wind sources. In contrast to the large horizontal axis wind turbines (HAWT), which are esta...

During last few years, the interest in using natural fibers as reinforcement in polymers has increased significantly. Natural fibers are not only strong and lightweight but also relatively very cheap and bio-degradable. In this work, an investigation is carried out on jute fiber, a natural fiber. Jute fiber has gained interest in the composite fiel...

The main objective of this paper is to analyze the thermal performance of direct expansion solar assisted heat pump DX-SAHP(A) by numerical simulation in MATLAB and comparing it with the thermal performance of DX-SAHP(B) which has an optimized collector area and mass flow rate. Optimization is performed for high exergy efficiency using Particle Swa...

During last few years, the interest in using natural fibers as reinforcement in polymers has increased significantly. Natural fibers are not only strong and lightweight but also relatively very cheap and bio-degradable. In this work, an investigation is carried out on jute fiber, a natural fiber. Jute fiber has gained interest in the composite fiel...

Wind turbine is a device that is used for converting kinetic energy from the wind into mechanical energy. The efficiency of wind turbine mainly depends on power coefficient of wind turbine. Maximization of power coefficient is one of the important factors for increasing efficiency in wind turbine. The maximized power coefficient enables high power...

This paper presents an approach for the determination of aerodynamic performance characteristics of horizontal-axis wind turbines. The optimum twist of a windmill blade is examined on the basis of elementary blade-element theory. For a given wind speed and blade angular velocity, it is shown that the maximum power efficiency is achieved when the bl...

Lift and Drag forces along with the angle of attack are the important parameters in a wind turbine system. These parameters decide the efficiency of the wind turbine. In this paper an attempt is made to study the Lift and Drag forces in a wind turbine blade at various sections and the effect of angle of attack on these forces. In this paper NACA 44...

This paper presents J-integral and stress intensity factor solutions for several crack configurations in plates. The edge crack is considered for the analysis. The tensile load is applied and the crack propagation is studied. The finite element method is used to model the plate and mode I stress intensity factors are evaluated. For solving the FE m...