Heat transfer is one of the processes used in industry and one of the tools needed to carry out heat transfer is a stirred tank equipped with a coil and jacket. The heat transfer experiment was carried out in a stirred tank with tap water as the feed used. The tap water as a hot fluid and a cold fluid. Heat transfer will not occur if there is no driving force, where in this experiment the driving force is the temperature difference between the hot fluid and the cold fluid. The heat transferred is expressed as the heat transfer coefficient. The overall heat transfer coefficient represents the overall heat transfer event in the heat transfer area, where the magnitude of the coefficient will be proportional to the driving force. The value of the overall heat transfer coefficient (Uo) can depend on the temperature of the hot fluid, the stirring speed, and the flow rate of the cold fluid. So that the research variables used are hot fluid temperatures of 350C, 410C, 470C, and 530C, stirring speeds (N) of 1 and 3, and cold fluid flow rates of 0.1 LPM, 0.15 LPM and 0.2 LPM. The heat transfer experiment in a stirred tank with this coil can be concluded that the value of the overall heat transfer coefficient (Uo) will be greater if the cold fluid flow rate (Qc) and stirring speed (N) are greater. Then the greater the temperature of the hot fluid (Th), the greater the value of the overall heat transfer coefficient, the individual inner heat transfer coefficient, and the outer heat transfer coefficient.

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