M. Dev Anand ¹, N. L. Maharaja ², K. Sanu Kailordson ³, N. Prabhu ⁴

Affiliations
1 Department of Mechanical Engineering, Noorul Islam Centre for Higher Education, Kumaracoil - 629 180, Thuckalay, Kanyakumari District, Tamil Nadu, IN
2 Department of Mechanical Engineering, PSN College of Engineering and Technology, PSN Nagar, Melathediyoor, Tirunelveli - 627152, Tamil Nadu, IN
3 Department of Mechanical Engineering, DMI Engineering College, Aralvaimozhi – 627105, Tamil Nadu, IN
4 Department of Mechanical Engineering, Kottayam Institute of Technology and Science (KITS), Chengalam East, Pallickathodu, Kottayam - 686585, Kerala, IN

Abstract

Background/Objectives: Ceramic heat exchangers are preferred in most high temperature applications due to its high temperature stability and corrosion resistance. Evaluation of performance of the heat exchanger under different circumstances helps us to select suitable design for certain application. Methods/Statistical Analysis: This work investigated the functioning capability of a ceramic heat exchanger, determining pressure drop and the heat transfer theoretically by Ɛ-NTU method by using silicon carbide and aluminium nitride as heat exchanger material. The performance of both the ceramic material under the desired condition was compared. A heat exchanger possess ducts that is rectangular to exhaust gas, ducts which are rectangular for air and exhaust gases, a core made of ceramic along with air in the cross-flow direction. Findings: Heat exchanger has been investigated involving conventional Ɛ-NTU technique with numerous Nusselt number correlations from the literature for characterizing the rectangular duct flow. Theoretical analyses reveal that, while using aluminium nitride as the heat exchanger material the performance parameters such as overall heat transfer got increased by 4.5-5%, effectiveness by 3% and heat transfer rate by same 3% relative to silicon carbide as the heat exchanger material. Applications/Improvements: Analysis on performance enhancement of all other heat exchanger.

Keywords

Ceramic Recuperator, Cross Flow, Effectiveness, Heat Transfer, Pressure Drop

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M. Dev Anand ¹, G. Glan Devadhas ², N. Prabhu ³, T. Karthikeyan ⁴

Affiliations
1 Department of Mechanical Engineering, Noorul Islam Centre for Higher Education, Kumaracoil - 629 180, Thuckalay, Kanyakumari District, Tamil Nadu, IN
2 Department of Electronics and Instrumentation Engineering, Noorul Islam University, Kumaracoil - 629 180, Thuckalay, Kanyakumari District, Tamil Nadu, IN
3 Department of Mechanical Engineering, Kottayam Institute of Technology and Science (KITS), Chengalam East, Pallickathodu, Kottayam - 686585, Kerala, IN
4 Department of Mechanical Engineering, Saveetha Nagar, Thandalam, Chennai - 602105, Tamil Nadu, IN

Abstract

A ceramic monolith heat exchanger has been learnt for finding out heat transfer performance and effectiveness on computing numerically and ξ-NTU method. In entire domain computation numerically has been performed along with fluid region in rectangular ducts of exhaust gas side, ceramic core and rectangular duct fluid region in air side with the air exhaust in direction of cross flow. Additionally, the heat exchanger has been examined for estimating the functionality via ξ-NTU technique that is conventional along numerous Nusselt number links for rectangular duct flow for the literature. Based on the research, it has been performed on the ceramic heat exchangers and on the ceramic materials and the demand in utilizing the ceramic materials in heat exchangers. Then the recuperator is modeled by using GAMBIT and it is analyzed using FLUENT. The effectiveness and the heat transfer rate are also calculated. Then those outcomes have been assessed along the experimental data. By comparison of both functionality by computing numerically and the ξ-NTU technique, the efficiency by ξ-TU technique has been identified to be nearest to product by the numerical computation among the associative of 2.15% when Stephan's Nusselt number association has been adapted to the ξ-NTU technique within numerous connections. The total heat transfer and effectiveness by ξ-NTU method relative errors utilizing five Nusselt number correlations from literature have been lesser than 14.5% comparative to numerical computation. Associated to Nusselt number correlations, the entire heat transfer utilizing ξ-NTU technique with Stephan's correlation is highly nearest to numerical computation. For that reason, the exit temperature by ξ-NTU method with Stephan's correlation simulates within 1.2% of the relative error for exhaust exist temperature and 0.45% for the air exit temperature assessed against the numerical computation. Overall heat transfer coefficient's relative errors by ξ-NTU technique utilizing five Nusselt number correlations for the literature have been more than 17.5% to that on computing numerically.

Keywords

Ceramic Recuperators, Cross Flow, Effectiveness, Heat Transfer, Pressure Drop

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M. Dev Anand ¹, S. Vijay Ananth ², D. Jackson ³, N. Prabhu ⁴

Affiliations
1 Department of Mechanical Engineering, Noorul Islam Centre for Higher Education, Kumaracoil - 629 180, Thuckalay, Kanyakumari District, Tamil Nadu, IN
2 Department of Mechanical Engineering, Agni College of Technology, Thalambur, Chennai - 600130, Tamil Nadu, IN
3 Department of Electronics and Instrumentation Engineering, Noorul Islam Centre for Higher Education, Kumaracoil - 629 180, Thuckalay, Kanyakumari District, Tamil Nadu, IN
4 Department of Mechanical Engineering, Kottayam Institute of Technology and Science (KITS), Chengalam East, Pallickathodu, Kottayam - 686585, Kerala, IN

Abstract

Background/Objectives: Diesel engine's optional fuel known as Biodiesel holds fatty acids alkyl monoesters from oils of vegetable or fats of animals. It can be formed from renewable sources namely vegetable oils, restaurant waste oil and fry oil. Bio Diesel may be cost effective if produced from feedstock of low cast namely restaurant animal fats, waste oil, and fry oil, which contains of free fatty acids having high amount (FFA). Methods/Statistical Analysis: When processing these oils that are low cost problem occurs and fats are those they regularly possess huge quantity of Free Fatty Acids (FFA) which is impossible for conversion as biodiesel by means of an alkaline catalyst. In this work, a technique has been described for reducing the free fatty acids content of this feedstock's utilizing pretreatment of an acid catalyzed to esterify the free fatty acids earlier to transterifying the triglycerides with catalyst of an alkaline to fulfill the reaction. Chief principle of this work was to expand a two-step production technique of biodiesel from pork waste as a raw material. The variables were methanol to oil ration, base catalyst and acid concentration. With particular attention for optimizing, the first step was the acid catalyst esterification to reduce the free fatty acid content and the second step was alkali catalyzed Transeseterification to convert fatty acid methyl ester. Experiments established the RSM model validity. Maximum percentage of fatty acid methyl ester under optimum conditions of the variables was 93%. Findings: Optimum condition for Transeseterification was 13:1 of methanol to oil, 0.4gm sodium hydroxide concentration and 90min of reaction time. Optimum condition for the acid catalyzed esterification was found to be 1.5v/v. ANOVA analysis has been executed for studying the effect of the variables and response surfaces were plotted. Experiments established the RSM model validity. Applications/Improvements: Experiments are going to be establishing the RSM model validity along with tuning with the help of intelligent algorithms.

Keywords

Biodiesel, Esterification, Free Fatty Acids, RSM, Transeseterification

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N. Prabhu ¹, M. Dev Anand ², S. Satish ³, C. K. Akhil ¹

Affiliations
1 Department of Mechanical Engineering, Kottayam Institute of Technology and Science (KITS), Chengalam East, Pallickathodu, Kottayam – 686585, Kerala, IN
2 Department of Mechanical Engineering, Noorul Islam Centre for Higher Education, Kumaracoil – 629180, Tamil Nadu, IN
3 Department of Electronics and Communication Engineering, Kottayam Institute of Technology and Science (KITS), Chengalam East, Pallickathodu, Kottayam – 686585, Kerala, IN

Abstract

Dynamics deals with not only forces but also torques necessary to lead to the motion of a system of bodies. The robot manipulators can also be approached from two different points of view: Dynamical analysis and dynamical synthesis. Dynamical analysis handles the equations of motion derivation of a specified manipulator. Two types of dynamical analysis problems exist: Direct dynamics and inverse dynamics. The computational efficiency of direct dynamics is not much as critical because it is utilized chiefly for computer simulations of a robot manipulator. Moreover, a competent inverse dynamic model turns into tremendously significant for real-time, model dependent control of a robot manipulator. A set of torque and/or force functions have to be functional at the actuated joints in the idea of generating that motion. These actuating torque and/or force functions rely not only on the spatial and attributes of the given path but also on the mass properties of the links, the pay load, the outwardly applied forces and so on. This paper deals with the dynamic analysis of a SCORBOT-ER V plus robot arm that is involved in performing victorious robotic manipulation task in its 3D workspace. This research considered mathematical dynamic model based on Lagrangian equations of motion and the result is compared with LabVIEW Software.

Keywords

Direct Dynamics, Inverse Dynamics, Lagrangien Equation, LabVIEW, Robot Manipulator

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