The invention relates to a
heat pipe photovoltaic hot water composite
system combined with a thermoelectric plate. The
system comprises a whole-plate photovoltaic hot water module, a
semiconductor double-layer heat exchange header, a photovoltaic and
electric power control system and a water tank. The double-layer heat exchange header comprises two
layers, i.e., a direct heat exchange layer and asemiconductor heating layer. On a clear day, circulating water flows through the direct heat exchange layer and the
semiconductor heating layer, hot water is produced, the temperature of a photovoltaic
cell is reduced and the
photoelectric conversion efficiency is increased. On a somber day, the circulating water only flows through the
semiconductor heating layer; the thermoelectric plate works; the
water temperature is obviously raised by the
heat pump effect of the thermoelectric plate; compared with the output of the hot water of a common PV (photovoltaic) / T (temperature)
system, the output of the hot water is greatly increased; the temperature of the photovoltaic
cell is lower and the
photoelectric conversion efficiency is higher. The invention has the characteristic that the
heat pipe photovoltaic hot water composite system can be miniaturized. The relationship between
electric power and the output of the hot water can be regulated according to the weather and the requirement. The utilizing efficiency and the quality of
solar energy are improved. Meanwhile, the dependence on an external power supply is reduced and the application range of the system is enlarged.