Scaling analysis for the ocean motions in single phase natural circulation

The invention relates to an urban asphalt concrete road surface temperature difference power generation system, which is formed by three subsystems, namely a solar heat collecting system, a power generation system and an electric energy storing and converting system, wherein the solar heat collecting system is used as the heat source of the whole system and is mainly formed by a heat collecting asphalt concrete layer doped with heat conduction materials such as graphite and a heat conduction aluminum sheet 3, which are paved on a road bed; the power generation system is formed by multiple semiconductor temperature difference power generation sheet modules 14 and heat conduction silica grease 15 for enhancing heat conduction; the electric energy storing and converting system comprises a DC (direct current)/DC converter 7, an inverter 9 and a storage battery bank 8 The system utilizes a semiconductor temperature difference power generation sheet 16 to convert the heat collected from the road surface to be directly used electric energy; meanwhile, the excessively fast temperature rising on the road surface in the daytime in summer is alleviated, and the temperature dropping of the road surface at night is accelerated, so the thermal stress damage to the road surface caused by temperature gradient is reduced, the use performance and the durability of the road surface are improved and the urban heat island effect is alleviated

Heat conduction asphalt concrete road surface temperature difference power generation system

The invention discloses a power generating system utilizing the internal and external environmental temperature difference of a building and belongs to the technical fields of thermal energy utilization and energy conservation. A heat pipe heat exchanger is installed outside a building, a semiconductor temperature difference power generating module is installed inside the building, a heat conduction device is fixed together with a radiating surface of the semiconductor temperature difference power generating module together to form a semiconductor thermoelectric cell, and the output of the semiconductor thermoelectric cell and a booster regulator are connected with a storage battery and household electric equipment. The power generating system utilizes temperature difference between the residential building and the external environment for driving the semiconductor thermoelectric cell to generate power, and is widely used in the household electric equipment as an auxiliary power supply. The power generating system has the advantages of being free from mechanical movement, noise-free, pollution-free, non-wear, long in service life and the like, thus having important practical significance in the new energy development.

Power generating system utilizing internal and external environmental temperature difference of building

The invention discloses a passive natural-circulation lead bismuth heat exchange device for heat transfer by a lead bismuth fluid and a method for discharging heat out of reactor core, belonging to the field of nuclear energy heat exchange equipment The heat exchange device particularly comprises two natural-circulation heat transfer loop structures, namely a round loop and a square loop, and is a device which realizes natural-circulation heat transfer at two sides The inner ring of an inner ring pipe is a primary side lead bismuth alloy fluid passage, and a secondary side fluid passage is arranged between the outer ring of the inner ring pipe and the inner wall of an outer ring pipe Heat generated by a subcritical reactor of an ADS (accelerator driven system) is transferred to coolants of the two loops by the liquid lead bismuth alloy through the inner ring pipe of the device, the lead bismuth alloy flows through the device to exchange heat with a secondary side fluid The primary side heat exchange fluid and the secondary side heat exchange fluid form natural circulation under the driving of a density difference, and the high-efficiency, energy-saving, safe and reliable passive characteristic is achieved The device is simple and easy to operate, is free of a complicated lead bismuth pump, is in no need of a power source and has the characteristics of energy conservation, high safety and high reliability The passive natural-circulation lead bismuth heat exchange device and the method for discharging heat out of the reactor core comply with the current policy of energy conservation and emission reduction and are easy in market promotion

Passive natural-circulation lead bismuth heat exchange device and method for discharging heat out of reactor core

The invention belongs to the field of nuclear power safety and heat energy utilization and discloses a nuclear power station signal injection system using temperature difference for sensing. A reactor pressure container, a semiconductor temperature difference power generation module and a heat conduction device are fixed together to form a semiconductor temperature difference battery. An output end of the semiconductor temperature difference battery is respectively connected with a voltage stabilizer, a signal processing system and a specially set safety facility. Temperature difference generated by the wall of the reactor pressure container and the internal environment of a safety casing is adopted to drive the semiconductor temperature difference battery to generate power and is applied to the nuclear power station signal injection system serving as voltage signals. The nuclear power station signal injection system has the advantages of rotating in passive mode and being convenient to implement, simple to control, high in reliability, free of noise or pollution, long in service life and the like, effectively ensures nuclear power safety and promotes low-grade energy utilization.

Nuclear power station signal injection system using temperature difference for sensing

The utility model discloses a nuclear power station safety injection signal device based on temperature difference sensing and belongs to the field of nuclear power safety and heat energy utilization devices A reactor pressure vessel, a semiconductor thermoelectric generation module and a thermal conduction device are fixed together to form a semiconductor thermoelectric cell, and an output of the semiconductor thermoelectric cell is connected with a voltage stablizer, a signal processing system and special-purpose safety facilities The nuclear power station safety injection signal device utilizes temperature difference generated by a wall of the reactor pressure vessel and an inner environment of a safety casing to drive the semiconductor thermoelectric cell to generate electricity, the generated electricity is directly taken as a voltage signal which is applied to nuclear power station safety injection devices The nuclear power station safety injection signal device has advantages of passive operation mode, convenient enforcement, simple control, high reliability, no noise, no pollution and long service life, more effectively guarantees nuclear power safety and facilitates low level energy utilization

Nuclear power station safety injection signal device based on temperature difference sensing

The utility model belongs to the field of nuclear power heat exchanging equipment, and relates to a passive lead-bismuth heat exchanging device capable of realizing natural circulation and transferring heat through lead-bismuth fluid, in particular to a device comprising a circular ring-shaped natural-circulation and heat-transfer loop and a square ring-shaped natural-circulation and heat-transfer loop and capable of realizing natural circulation and heat transfer at both sides. According to the utility model, an inner circle of an inner ring pipe is a primary-side lead-bismuth alloy fluid passageway, and a secondary-side fluid passageway is arranged between an outer circle of the inner ring pipe and an inner wall of an outer ring pipe; a lead-bismuth alloy heater, a lead-bismuth alloy charging/discharging pump, a lead-bismuth alloy storage tank and the primary-side lead-bismuth alloy fluid passageway form a primary loop, and the secondary-side fluid passageway, a secondary loop cooler and a secondary loop fluid charging/discharging pump form a secondary loop; heat produced by a subcritical reactor of an ADS (Accelerator Driving System) and the lead-bismuth alloy fluid in the inner ring pipe exchange heat with cooling agent in the outer ring pipe; and heat exchanging fluid at the both sides form natural circulation as is driven by density difference. The passive lead-bismuth heat exchanging device capable of realizing natural circulation has the characteristics of high efficiency, energy saving property, safety, reliability and passive property, is easy and easy to implement, and is easy to popularize.

Passive lead-bismuth heat exchanging device capable of realizing natural circulation

The invention discloses a drive controller based on characteristics of 4-DEG C water and a control method thereof, which belong to the technical field of nuclear power plant safety control. The drive controller is formed by a water storage, a piezoelectricity conversion layer, a piezoelectricity piston, a signal amplifier, a drive controller body, a controlled device and a connecting rod, wherein the piezoelectricity conversion layer is fixed on one wall of the water storage; the piezoelectricity piston is connected with the piezoelectricity conversion layer; and the piezoelectricity piston is connected in series with the signal amplifier, the drive controller body, the controlled device and the connecting rod to form a loop. According to the invention, the 4-DEG C water is heated or cooled to make a change in volume during abnormal operation, an executor of the controlled device is controlled via two ways, including electric signal control and connecting rod mechanical drive, so as to obtain passive control ability and effectively improve the system safety.

Drive controller based on characteristics of 4-DEG C water and control method thereof

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