32results about How to "Lower working fluid temperature" patented technology

The steam compressing refrigeration cycle device includes main cycle system comprising booster pump, condensator, expansion motor, evaporator and compressor connected successively with pipeline to output cold; and secondary cycle system comprising throttle connected across the inlet of the booster pump and the outlet of the condensator as well as the booster pump and the condensator, to further lower the temperature of the work medium in the outlet of the compressor. The expansion motor has its output torque rotating the booster pump and has isoentropic expansion to reduce the entropy of the work medium entering the condensator. The booster pump reduces the operation pressure difference and the power consumption of the compressor. Therefore, the present invention has energy efficiency near ideal inverse Carnot cycle and low hot load one compressor, and may be used widely in refrigeration cycle in air conditioner, refrigerator, etc.

The invention provides a pump-driven two-phase circuit device for heat dissipation of a high heat flux electronic device. Heat is collected and transported by using an endothermic process in evaporation and an exothermic process in condensation during a circulation flow process of a working medium. An evaporator for the circuit device comprises micro-channels and fins. In an area of high heat flux, the micro-channels are used to dissipate heat and increase a heat transfer coefficient of a partial area, while in an area of low heat flux, the fins are used. Due to great area difference between the micro-channel area and the fin area in the evaporator, when the working medium in the micro-channels enters the fin area, volume quickly expands and temperature of the working medium reduces, so as to help heat dissipation of the device in the fin area. By using different structures and with little resources, heat dissipation problems of devices with different powers are solved. The pump-driven two-phase circuit device for heat dissipation of the high heat flux electronic device can adapt to heat dissipation of electronic devices with different heat flux densities and can satisfy working requirements of electronic devices with a heat flux density of 50 W/cm<2> or above.

The invention discloses an air-source heat-pump air heater adopting a parallel-type evaporator, comprising an air source heat pump and a condenser fan. The evaporator of the air source heat pump comprises a group of working evaporators and at least one group of spare evaporators, the refrigerant input ends and the refrigerant outputs of the evaporators are connected in parallel by a manifold, the refrigerant input ends of the spare evaporators are controlled by an electromagnetic valve, a ratio of the heat exchange area of a condenser to the input power of a compressor is 5.6-13.5 m<2>/kw, and the condenser fan has the total pressure of 80-400 Pa. The invention fully exerts the heating potential of the air source heat pump to improveso the energy efficiency ratio of the system and satisfy the need for drying materials or heating in life, improves the working capacity and the environmental change suitability of the air-source heat-pump air heater so that the system stably operates, ensures that the application range of the air source heat pump is greatly enlarged, and has wide geographic or climatic suitability range and positive significance in saving energy and protecting environment.

The invention discloses a supercritical carbon dioxide coal-fired circulating fluidized bed boiler, a power generation system and a power generation method. The supercritical carbon dioxide coal-firedcirculating fluidized bed boiler comprises a hearth, a separator, a tail flue and an externally-arranged type heat exchanger located in a material back section of the separator. A cooling wall and anintermediate-temperature overheater are arranged in the hearth. A high-temperature reheater and a low-temperature overheater are arranged in the externally-arranged type heat exchanger, wherein the low-temperature overheater communicates with the cooling wall and the intermediate-temperature overheater. A low-temperature reheater, a high-temperature overheater, an upper-level economizer, a lower-level economizer and an air preheater are arranged in the tail flue, wherein the high-temperature overheater communicates with the intermediate-temperature overheater, the low-temperature reheater communicates with the high-temperature reheater. The working medium of the boiler is supercritical carbon dioxide. By the adoption of the supercritical carbon dioxide coal-fired circulating fluidized bedboiler, the wall temperature of the cooing wall can be effectively controlled, it is guaranteed that the boiler safely and reliably operates, and the heat efficiency is high; a power generator set tends to be miniature, a higher load response speed is obtained, the deep peak load regulation adaptability is high, the advantages of coal resources are taken into full play, the energy utilization rate is improved, and energy safety is guaranteed.

The invention relates to a supercritical carbon dioxide circulating coal-fired power generation system. The supercritical carbon dioxide circulating coal-fired power generation system comprises a hearth and a primary reheater, a membrane type wall is arranged on the inner wall of the hearth, a secondary superheater is arranged at the upper end of the hearth, a separator is connected to the outer end of the top of the hearth, the bottom end of the separator is connected with a return valve, one end of the bottom of the return valve is connected into the hearth, the other end of the bottom of the return valve is connected with an external heat exchanger, and an outlet of the external heat exchanger is connected to one end of the bottom of the hearth. The supercritical carbon dioxide circulating coal-fired power generation system has the beneficial effects that the supercritical carbon dioxide circulation is combined with a circulating fluidized bed boiler, the fuel flexibility of the circulating fluidized bed boiler is good, high-sulfur coal and low-calorific-value fuel can be efficiently utilized, the up-to-standard emission can be realized only through the desulfurization and low-temperature combustion nitrogen inhibiting in the furnace, the heat efficiency of the circulating fluidized bed boiler can achieve 90% or more, and compared with a pulverized coal fuel boiler, the circulating fluidized bed boiler has better economical advantages.

The invention relates to a heat pump drying system adopting industrial circulating water as a heat source. The heat pump drying system comprises a drying case, a condenser, a compressor, an evaporator, a throttle and a fan, wherein the drying case is provided with an air inlet and an air outlet. The system further comprises a primary settling pond, a heat recovery pond and a settling pond, wherein a first heat conducting portion is arranged in the heat recovery pond, a second heat conducting portion is arranged in the evaporator, and the condenser is provided with a third heat conducting portion corresponding to the air inlet. The inlet end of the compressor communicates with the outlet end of the first heat conducting portion, and the outlet end of the compressor communicates with the inlet end of the third heat conducting portion. The inlet end of the throttle communicates with the outlet end of the third heat conducting portion, and the outlet end of the throttle communicates with the inlet end of the second heat conducting portion. The outlet end of the second heat conducting portion communicates with the inlet end of the first heat conducting portion. The inlet end of the evaporator communicates with the air outlet, and the outlet end of the evaporator communicates with the air inlet. The heat pump drying system can reduce energy consumption, improve the energy utilization rate and reduce environment pollution.

The invention discloses an operation method of a two-stage-throttling intermediate complete cooling type refrigeration system and the two-stage-throttling intermediate complete cooling type refrigeration system. The operation method of the two-stage-throttling intermediate complete cooling type refrigeration system and the two-stage-throttling intermediate complete cooling type refrigeration system aim to achieve that a low-pressure-grade compressor heat pump circulation is used for wheel gear defrosting of low-temperature evaporators. An intermediate temperature evaporator and a low-temperature evaporator are arranged in each low-pressure-grade unit, wherein the intermediate temperature evaporator is used for achieving intermediate temperature refrigeration, and the low-temperature evaporator is used for achieving low-temperature refrigeration or defrosting. The operation method comprises the steps that when one low-temperature evaporator needs defrosting, through valve switching, a low-pressure-grade compressor having the defrosting function is converted into a high-pressure-grade compressor to operate, the low-pressure-grade compressor in the low-pressure-grade unit achieving the defrosting function sucks a working medium from the low-pressure-grade compressor achieving the refrigeration function, after the working medium is compressed, the working medium condenses to heat the low-temperature evaporator to be defrosted, and then defrosting is achieved; when multiple low-temperature evaporators need defrosting, wheel gear type defrosting is adopted. According to the two-stage-throttling intermediate complete cooling type refrigeration system and the two-stage-throttling intermediate complete cooling type refrigeration system, the defrosting circulation and the refrigeration circulation are both double-grade compression circulations, the temperature fluctuation of a cold storage is small, the structure is simple, and the efficiency is high.

A self-heat-absorption type heat exchanger combination belongs to the field of thermoelectric technology of a heat exchanger combination, is a combination of two heat exchangers and a refrigerator and is used for thermal power generation, nuclear power generation and exhaust steam heat power generation with media in closed circulation. According to the self-heat-absorption type heat exchanger combination, a working medium before a circulating pump absorbs the heat of a working medium behind the circulating pump to achieve absorption and reutilization of waste heat and improve the heat utilization rate; an external cold source is only used for cooling the last heat exchanger and carries away a little heat, the deposition of river water dirt is reduced to avoid cleaning of a steam condenser, and a low-temperature heater and a high-temperature heater are omitted; and the heat-electricity conversion efficiency is greatly improved.

The invention discloses a method for achieving geothermal power generation through double-working-medium underground heat exchange and a heat exchange production structure. The method comprises the following steps that an open hole section, a perforation section and a well section annulus are formed in a well from bottom to top; an electric submersible pump and a first packer are put into a geothermal production well through a production pipe column, and the open hole section and the perforation section are sealed and separated through the first packer in a setting mode; the production pipe column is separated from the electric submersible pump, and a second packer on the production pipe column sets and packs the perforation section and the well section annulus; a heat removal working medium injection pipe column is put down into the production pipe column, and high-pressure gas is injected into the annulus of the pipe column to replace accumulated liquid in the pipe column in a reverse circulation mode; the electric submersible pump is started to circulate geothermal fluid of a stratum, meanwhile, a liquid heat removal working medium, a gaseous heat removal working medium and the geothermal fluid are injected into the heat removal working medium injection pipe column to complete double-working-medium heat exchange at the well bottom, heat energy of the geothermal fluid is converted into heat removal working medium pressure energy, and the gaseous heat removal working medium is output from a well opening; and when the wellhead stably generates the gaseous heat removal working medium, the wellhead is switched to a turbine to drive a generator set to generate power.

The invention discloses an air intake system of an engine. The air intake system of the engine comprises an air intake manifold and an air cylinder cover, wherein the air intake manifold comprises aninternal insertion air channel and an air intake manifold body, a first end of the internal insertion air channel communicates with an air outlet of the air intake manifold body, a second end of the internal insertion air channel is inserted in an air intake channel of the air cylinder cover, the internal insertion air channel is made of a material with low heat conductivity coefficient, and the air intake manifold body is fixed on the outer wall of the air cylinder cover. The internal insertion air channel with low heat conductivity coefficient is used as one part of the air intake channel ofthe air cylinder cover of the engine, as the heat conductivity coefficient of the internal insertion air channel, the heating effect of the air intake channel of the air cylinder cover of the engineon air can be reduced, and the volume coefficient of the engine can be enhanced.