International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 11 | Nov -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 825 Validation of Design Parameters of Radiator using Computational tool K. Arasu 1 , T. Ramesh 2 1 Professor, Department of Mechanical Engineering, Bannari Amman Institute of Technology, Tamil Nadu, India 2 PG Student, Department of Mechanical Engineering, Bannari Amman Institute of Technology, Tamil Nadu, India ---------------------------------------------------------------------***--------------------------------------------------------------------- ABSTRACT - Today’s automobiles are getting equipped with high powered engines. The process of equipping such automobiles with hiss necessitated the need for improving the cooling efficiency of its radiators. The present work aims on studying the thermal behaviour of automobile radiators. Both LMTD and NTU methods are widely used for design and performance analysis. In recent years, software is used as a validating tool to generate results. This paper explains these methods along with software results. This paper also includes the case studies on two known examples from a text book. The validated results and comparisons are presented. This work provides a clear way for the easier verification of the thermal performance of radiators. The designers involving radiators could use this research as a base for improving their performance. The software used for the performance evaluation is HXcombine for analysing heat exchangers. The results obtained serve as good database for the future investigations. Keywords: Automobile Radiator, Cooling Efficiency, Case study, LMTD, NTU, Software 1. INTRODUCTION The Radiator is a kind of heat exchanger which is used for cooling IC engines, especially in automobiles. The radiator system works by sending liquid coolant through passages in the engine block and heads, from where the coolant picks up heat from the engine block and heads. Fig - 1: Typical car radiator [1] The heated fluid is then carried to the radiator through the rubber hose. Improving the cooling efficiency (only above the optimum temperature) of the radiator improves the performance of the engine. Most of the researches in this field are concentrating on improving the heat transfer rate by means of altering the properties of the coolant by adding some nanoparticles. A typical radiator used in automobiles is shown in figure 1. This paper discusses the comparative analysis of theoretical and software methods of designing radiators. 2. EXPERIMENTAL SCHEME The outlet of the radiator is connected to the oil storage tank. The oil storage tank is connected to the heater. This in turn is connected to the inlet of the radiator. For the flow purpose the centrifugal pump is used and for connection purpose the rubber hoses are used. The research work involves the analysis of cooling performance of radiator by introducing different nanoparticles and also by altering their usual design. The proposed approach follows the following layout Fig - 2: CAD Drawn Experimental Layout The coolant enters the radiator in hot condition. The radiator distributes the hot coolant into its branched tubes where the coolant transfers its heat to the surroundings through the fins. The coolant leaves the radiator at a temperature just above the optimum temperature. This coolant is stored in the oil storage tank. From the storage tank the oil is taken through the engineǯs coolant jackets ȋhere the engine is replaced by heater coils). As a result the coolant carries away the excess heat from the engine. This coolant in hot condition is taken to the radiator and the cycle continues.