The invention discloses a hot
water temperature differential power generation device which comprises a heat collector, a first
storage tank, a second
storage tank, a plurality of
silicon semiconductors, a plurality of
germanium semiconductors, a plurality of
metal conductors, two power supply leading wires, a cold
water cooling panel and a low-power-consumption circulating water pump. The first
storage tank is used for storing hot water for heating hot ends of
semiconductor power generation elements. The second storage tank is used for storing cold water for cooling cold ends of the
semiconductor power generation elements. The plurality of
silicon semiconductors and the plurality of
germanium semiconductors are arranged in parallel in a mutually alternately mode. The plurality of
metal conductors are used for connecting the
tail ends of the
silicon semiconductors and the
tail ends of the
germanium semiconductors in series. The two power supply leading wires are respectively led out from the
metal conductor fixed at the leftmost end among the cold ends and the metal conductor fixed at the rightmost end among the cold ends. The cold
water cooling panel is used for rapidly scattering excessive heat conducted from the hot ends into the cold water so as to ensure that the
temperature difference between the hot ends and the cold ends can be stabilized at a specified value. The low-power-consumption circulating water pump is used for pumping underground water through a sealed pipeline to be the cold water. The hot
water temperature differential power generation device is simple in structure, low in invested cost, convenient to install, environment-friendly and energy-saving, and solves the problems that inhabitants in an area without
electricity need to use
electricity or the inhabitants are badly in need of
electricity when power failure happens.