31results about How to "Achieve natural circulation" patented technology

A photovoltaic solar greenhouse based on shade shed and sun shed integration comprises a greenhouse sun shed, a greenhouse shade shed, an insulation wall, solar panels, greenhouse glass, solar panel supports, greenhouse supports, an interior air circulation window, an exterior air exchange window, green leaf plants, fungi, shade-requiring plants, greenhouse film, insulation grass mat, a solar controller, an inverter, and an outer power grid. The photovoltaic solar greenhouse based on shade shed and sun shed integration is characterized in that the sun shade and the shade shed are isolated by the same insulation wall made of phase change concrete and bricks, the sun shed is arranged on the sunward side of the insulation wall, the green leaf plants are planted in the sun shed, the shade shed is arranged on the shade side of the insulation wall, the fungi are planted in the shade shed, the solar panels are disposed at the top of the insulation wall and the top of the shade shed, the power output end of every solar panel is connected to the solar controller and the converter through a wire, power converted by the inverter is connected to the outer power grid or an auxiliary power supply, and a whole solar power system closed circuit is formed.

The invention discloses a quick draining pavement structure for urban low-lying roads. The structure comprises a pavement motor way surface layer, a flexible base is arranged below the pavement motor way surface layer, soil base is arranged below the flexible base, a water-resisting layer is arranged between the flexible base and the soil base, and one flexible base side facing the soil base is design as a stepped structure. The stepped surface at a road section low-lying part is high, and the stepped surface at a road section high convex part is low, if the height of some stepped surface is lower than those of two adjacent stepped surfaces, or some stepped surface only has one adjacent stepped surface and the stepped surface is lower than the adjacent stepped surface, a gravel drainage channel can be disposed below the stepped surface, and a filter layer is arranged between the flexible base and the gravel drainage channel. The quick draining pavement structure provided by the invention can solve the technical problems of impeded pavement drainage and easy waterlogging in existing urban road low-lying areas, and is especially suitable for paving of urban roads with large elevation difference between adjacent road sections.

The invention relates to a wet-type spent fuel storage system, belonging to the field of nuclear power station spent fuel storage. The invention implements long-time storage of spent fuel by adopting a non-kinetic mode. A spent fuel storage grid is arranged on the bottom of a spent fuel storage pool which contains a coolant; a sealed container carrying a spent fuel assembly is arranged on the spent fuel storage grid; an air cooling tower is arranged on the upper part of the spent fuel storage pool; one end of a heat-tube cooling unit is arranged in the air cooling tower; and the other end of the heat-tube cooling unit is immersed in the coolant of the spent fuel storage pool. By utilizing the decay heat generated by the spent fuel to drive the separate cooling unit without external driving force, the invention implements natural circulation of the coolant in the spent fuel storage pool; the invention implements the long-time storage of the spent fuel in a non-kinetic mode, and has the advantage of reliable operation.

The invention discloses self-circulation culvert type natural ventilation equipment, which comprises a straight-through wind pipe for communicating the internal environment with the external environment of a house, wherein straight-through wind pipe is divided into a first passage and a second passage which are longitudinally symmetrical with each other by a baffle plate which is horizontally arranged along the axial direction of the straight-through wind pipe; the first passage and the second passage are communicated with an upward first wind gap and a downward second wind gap respectively by getting close to the inside of the house; and the first wind gap and the second wind gap are provided with linkage switch valves. The self-circulation culvert type natural ventilation equipment performs air convection by using indoor and outdoor heat pressure differences to ensure that hot air flows indoors from one passage and indoor cold air is discharged out from the other passage so as to realize the natural circulation of fresh air feeding and discharging without additional powder, and controls the outdoor fresh air volume introduced indoors to reduce air-conditioning cooling load or heating thermal load losses caused by excessive fresh air introduction so as to meet requirements on energy saving; besides, the self-circulation culvert type natural ventilation equipment has the functions of thermal insulation, sound insulation, dust prevention and insect prevention.

The invention belongs to the technical field of solar and biomass energy utilization and in particular relates to an overground solar methane tank capable of realizing natural circulation of a hot water system. According to the overground solar methane tank, the natural circulation of the solar hot water system is realized by virtue of a siphon force generated by density difference of cold and hot water, the fermentation temperature of methane in a methane fermentation tank is increased, and the rate of methane production by fermentation is increased. The overground solar methane tank comprises the solar hot water circulation system and the methane fermentation tank, wherein the solar hot water circulation system comprises a solar heat collector, an ascending pipe, a heat storage water tank, a descending heat dissipation pipe set, a water return and collection tank and a water return pipe; a water outlet in the top of the solar heat collector is communicated with the heat storage water tank through the ascending pipe; the heat storage water tank is communicated with the water return and collection tank through the descending heat dissipation pipe set; the water return and collection tank is communicated with a water inlet in the bottom of the solar heat collector.