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Abstract
A piston engine is a type of engine that uses a piston mechanism as its main component. How this engine works involves burning fuel such as hydrocarbon or hydrogen compounds to push the piston. One of the important components in a piston engine is the carburetor, which is responsible for regulating the air and fuel ratio, controlling engine performance, as well as mixing fuel and air to form a mixture that can burn into mechanical energy. Aircraft equipped with piston engines can reach a flight altitude of up to 12,000 feet or around 3657.6 meters. The research conducted employs a simple experimental method process with the construction of a prototype and a heat exchanger simulation that utilizes exhaust gas from a genset engine to prevent carburetor freezing in the piston engine. One of the analyzed components is the vortex generator with a special configuration, namely the Double V-Cut Twist Tape Insert. The results of the research show that changing or increasing the shape of the vortex generator, inside a straight pipe, can produce turbulent air flow and increase heat transfer to a cooler medium, in this case the air inside the shell, while maximizing the heat transfer from the temperature fluid. high in exhaust gases. In contrast to these conditions, maximum heat absorption occurs in the low temperature fluid inside the shell. From this research it is concluded that modifications to the vortex generator, especially with the use of Double V-Cut Twist Tape Insert, can influence the overall heat transfer coefficient (Uo) by 0% at Twist 3, 4% at Twist 4, and 23% at Twist 5. There is a pressure drop (∆P) of 0% on Twist 3, -22.0% on Twist 4, and 21% on Twist 5, and the effectiveness (ε) of the heat exchanger on Twist 3 is 0.0%, Twist 4 is - 0.9%, and Twist 5 at -5.9%.