This document discusses performance evaluation of automobile radiators. It begins with an abstract that outlines the goal of studying and analyzing the thermal behavior of automobile radiators using the LMTD and ε-NTU methods. It then provides background on radiators and their role in removing waste heat from engines. The literature review summarizes previous studies on optimizing radiator design parameters like tube pitch and airflow velocity. The problem statement discusses the need to improve radiator performance as engines have become more powerful. The experimental scheme and design parameters sections outline the planned study to evaluate radiator prototypes using different parameters. In conclusions, the work aims to enhance radiator performance by altering convective heat transfer coefficients and provide easier radiator design using case