Hotel energy-saving shell-and-tube heat exchanger achieving cooperative communication starting

The invention provides a hotel energy-saving shell-and-tube heat exchanger. The heat exchanger comprises a shell, tube plates are arranged at the two ends of the shell respectively, heat exchange components are arranged in the shell, each heat exchange component comprises a center tube, a left side tube, a right side tube and tube sets, and a first outlet and a second outlet are formed at the two opposite sides of each center tube; and the position of each right tube set is the position where the corresponding left tube set rotates by 180 degrees along the axis of the corresponding center tube. Two sets of heat exchange components are arranged, each set of heat exchange components comprise multiple heat exchange components, each heat exchange component is independently controlled, and the number of the started heat exchange components of the first set and the second set is periodically changed along with the change of time. According to the heat exchanger, heat exchange is carried out in a time variability ma