The LMTD of a heat exchanger is supposed to be 23.2°C. The outside diameter of heat transfer tube is 2 cm. The thickness of tube is 3 mm. The heat transfer

coefficient of inner side of tube is 9000 W/(m².°C) and 6000 W/(m².°C) for outside. The thermal conductivity of tube wall is 20 W/ (m°C). Find the linear power density of the tube. (Power of 1 meter tube).