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122 results about "Endothermic process" patented technology

An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes. The term was coined by Marcellin Berthelot from the Greek roots endo-, derived from the word "endon" (ἔνδον) meaning "within", and the root "therm" (θερμ-), meaning "hot" or "warm" in the sense that a reaction depends on absorbing heat if it is to proceed. The opposite of an endothermic process is an exothermic process, one that releases, "gives out" energy in the form of heat. Thus in each term (endothermic & exothermic) the prefix refers to where heat goes as the reaction occurs, though in reality it only refers to where the energy goes, without necessarily being in the form of heat.

Bidirectional thermal cycle and second type of heat-driven compression heat pump

The invention provides a bidirectional thermal cycle and second type of heat-driven compression heat pump, and belongs to the power and heat pump technology field. A bidirectional thermal cycle 1234561 comprises the steps of a working medium boost process 12 that begins from a low temperature; a heat absorption process 23 that absorbs heat from a middle temperature heat source; a boost process 34 that begins from a middle temperature; a heat release process 45 that releases heat to a high temperature heat source; a pressure reduction process 56 that begins from a high temperature; a heat release process 61 that releases heat to a low temperature heat source. A compressor has cycle working medium and is communicates with a second compressor through a heat exchanger; the second compressor has the cycle working medium channel and is communicated with an expander through a heater; the expander has the cycle working medium channel and is communicated with a compressor through a cooler; the heat exchanger has a middle temperature thermal medium channel and is communicated with the outside; the heater has a heated medium channel and is communicated with the outside; the cooler has a cooling medium channel and is communicated with the outside; the expander is connected with the compressor and the second compressor, and is used to transmit power to form the second type of heat-driven compression heat pump.
Owner:李华玉

Bidirectional thermal cycle and first type of heat-driven compression heat pump

The invention provides a bidirectional thermal cycle and first type of heat-driven compression heat pump, and belongs to the power, refrigeration and heat pump technology field. A bidirectional thermal cycle 1234561 comprises the steps of a working medium boost process 12 that begins from a low temperature; a heat absorption process 23 that absorbs heat from a middle temperature heat source; a boost process 34 that begins from a middle temperature; a heat release process 45 that releases heat to a high temperature heat source; a pressure reduction process 56 that begins from a high temperature; a heat absorption process 6 that absorbs heat from a low temperature heat source. A compressor has cycle working medium and is communicates with an expander through a high temperature heat exchanger; the expander has the cycle working medium channel and is communicated with a second expander through a heater; the second expander has the cycle working medium channel and is communicated with the compressor through a low temperature heat exchanger; the high temperature heat exchanger has a high temperature thermal medium channel and is communicated with the outside; the low temperature heat exchanger has a low temperature thermal medium channel and is communicated with the outside; the heater has a heated medium channel and is communicated with the outside; the expander and the second expander are connected with the compressor to transmit power to form the first type of heat-driven compression heat pump.
Owner:李华玉

Dual-way thermodynamic cycle and first-type thermal-drive compression heat pump

The invention provides a dual-way thermodynamic cycle and a first-type thermal-drive compression heat pump and belongs to the technical field of dynamics, refrigeration and heat pumps. The dual-way thermodynamic cycle 1234561 is composed of a course 12 in which a working medium is boosted from a middle temperature, a course 23 in which the working medium absorbs heat from a high-temperature heat source, a course 34 in which the working medium is decompressed from a high temperature, a course 45 in which the working medium absorbs heat from a low-temperature heat source, a course 56 in which the working medium is boosted from a low temperature, and a course 61 in which the working medium releases heat to a middle-temperature heat source. A compressor is equipped with a circulating medium channel which communicates with a second compressor by a heat supply device; the second compressor is equipped with a circulating medium channel which communicates with an expansion machine via a high-temperature heat exchanger; the expansion machine is equipped with a circulating medium channel which communicates with the compressor via a low-temperature heat exchanger; the high-temperature heat exchange is equipped with a high-temperature thermal medium pipeline which communicates with the external environment; the low-temperature heat exchange is equipped with a low-temperature thermal medium pipeline which communicates with the external environment; the heat supply device is equipped with a heated medium pipeline which communicates with the external environment; and the expansion machine is connected to the compressor and the second compressor and transmits power. In this way, the first-type thermal-drive compression heat pump is formed.
Owner:李华玉

Bidirectional thermal cycle and second type of heat-driven compression heat pump

The invention provides a bidirectional thermal cycle and second type of heat-driven compression heat pump, and belongs to the power and heat pump technology field. A bidirectional thermal cycle 1234561 comprises the steps of a working medium boost process 12 that begins from a low temperature; a heat absorption process 23 that absorbs heat from a middle temperature heat source; a boost process 34 that begins from a middle temperature; a heat release process 45 that releases heat to a high temperature heat source; a pressure reduction process 56 that begins from a high temperature; a heat release process 61 that releases heat to a low temperature heat source. A compressor has cycle working medium and is communicates with a second compressor through a heat exchanger; the second compressor has the cycle working medium channel and is communicated with an expander through a heater; the expander has the cycle working medium channel and is communicated with a compressor through a cooler; the heat exchanger has a middle temperature thermal medium channel and is communicated with the outside; the heater has a heated medium channel and is communicated with the outside; the cooler has a cooling medium channel and is communicated with the outside; the expander is connected with the compressor and the second compressor, and is used to transmit power to form the second type of heat-driven compression heat pump.
Owner:李华玉

Open-type bidirectional thermodynamic cycle and second-class thermally-driven compression heat pump

The invention provides an open-type bidirectional thermodynamic cycle and a second-class thermally-driven compression heat pump belonging to the technical fields of heat energy utilization and heat pumps. The open-type bidirectional thermodynamic cycle is formed by a process 12 of cold source medium pressure rise beginning from a low temperature, a process 23 of absorbing heat from a medium-temperature heat source, a process 34 of pressure rise beginning from a medium temperature, a process 45 of releasing heat towards a high-temperature heat source and a process 56 of pressure reduction beginning from a high temperature. The outside communicates with a compressor by virtue of a cold source medium channel; the compressor communicates with a second compressor through a heat exchanger by virtue of a cold source medium channel; the second compressor communicates with an expansion machine through a heat supply device by virtue of a cold source medium channel; the expansion machine communicates with the outside by virtue of a cold source medium channel; the heat exchanger communicates with the outside by virtue of a medium-temperature heat medium channel; the heat supply device communicates with the outside by virtue of a heated medium channelA cold source medium channel which communicates with a compressor is arranged at the outside; the compressor is provided with a cold source medium channel which communicates with a second compressor through a heat exchanger; the second compressor is provided with a cold source medium channel which communicates with an expansion machine through a heat supply device; the expansion machine is provided with a cold source medium channel which communicates with the outside; the heat exchanger is internally provided with a medium-temperature heat medium channel which communicates with the outside; the heat supply device is provided with a heated medium channel which communicates with the outside; and the expansion machine is connected with the compressor and the second compressor and is used for transmitting power, so that the second-class thermally-driven compression heat pump is formed.
Owner:李华玉

Open type both-way thermodynamic cycle and first-kind heat drive compression type heat pump

The invention provides an open type both-way thermodynamic cycle and a first-kind heat drive compression type heat pump, and belongs to the technical field of power, refrigerating and heat pumps. The open type both-way thermodynamic cycle is formed through the heated medium pressure decreasing process 12 starting from the intermediate temperature, the heat absorbing process 23 starting from a low temperature heat source, the pressure increasing process 34 starting from the low temperature, the heat absorbing process 45 starting from a high-temperature heat source and the pressure decreasing process 56 starting from the high temperature. An outer portion is provided with a heated source medium channel to communicate with an expansion machine, and the expansion machine is further provided with a heated medium channel to communicate with a compressor through a low-temperature heat exchanger. The compressor is further provided with a heated medium channel to communicate with a second expansion machine through a high-temperature heat exchanger. The second expansion machine is further provided with a heated medium channel to communicate with the outer portion. The low-temperature heat exchanger is further provided with a low-temperature heat medium channel to communicate with the outer portion. The high-temperature heat exchanger is further provided with a high-temperature heat medium channel to communicate with the outer portion. The expansion machine and the second expansion machine are connected with the compressor and transmit power. Accordingly, the first-kind heat drive compression type heat pump is formed.
Owner:李华玉

Pump-driven two-phase circuit device for heat dissipation of high heat flux electronic device

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.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

Transcritical carbon dioxide power cycle and absorption heat pump combined heat and power cogeneration system for high temperature flue gas waste heat recovery

The invention discloses a CO2 power cycle and absorption heat pump combined heat and power cogeneration system for high temperature flue gas waste heat recovery. The CO2 power cycle and absorption heat pump combined heat and power cogeneration system realizes combined heat and power cogeneration by integrating high and low temperature power cycle and absorption heat pump cycle. The power cycle uses CO2 as the working medium, the endothermic process is located at the supercritical pressure, the exothermic process to a cold source is located at the subcritical pressure, and a transcritical cycleform is achieved. The high-temperature power cycle uses high-temperature flue gas as a heat source, and the low-temperature power cycle absorbs heat from dead steam of the high-temperature power cycle. An absorption heat pump system uses low-temperature power cycle high-temperature dead steam as a driving heat source and a low-temperature dead steam as a low temperature heat source, the waste heat resources are fully used as far as possible, and the COP of the absorption heat pump cycle is increased. The CO2 power cycle and absorption heat pump combined heat and power cogeneration system improves the heat exchange matching between the circulation and the variable temperature heat source, effectively utilizes the recycled dead steam heat, realizes the cascade utilization of different tasteresidual heat energy, and improves the overall energy utilization efficiency of the system.
Owner:山西山安蓝天节能科技股份有限公司

Tower type solar boiler

InactiveCN102889694AOvercome the spot fluctuation on the heating surfaceOvercome uniformity issuesSolar heating energySteam generation heating methodsWater vaporEnergy flux
The invention belongs to the solar field and relates to a tower type solar boiler. The solar boiler consists of a solar reflector field and a three-section type staged and zonal heat collection tower, wherein the solar reflector field consists of three fan-shaped heliostat fields from the interior to the exterior, and solar radiation is reflected to three stages of heat absorbers respectively by the three heliostat fields to produce saturated water, dry saturated vapor and superheated vapor. Due to the adoption of miniature heliostats, on one hand, the uniformity and the controllability of the energy flux density of light spots are improved, and the efficiency is largely improved; and on the other hand, the accuracy requirement of a heliostat tracking control system is lowered, and the cost is lowered. The heat absorbers are divided into three sections according to the heating power properties of the water and the vapor in different heat absorption processes. Meanwhile, the heliostat fields are designed according to the energy flux distribution requirements of all the heat absorbers, and the problems that two-phase flow in a single stage of heat absorber or two stages of heat absorbers causes instable heat exchange and nonuniform heat stress distribution on the surface of the heat absorber are solved. The solar boiler is suitable for solar power stations.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Corrosion scaling experiment detection system and method in geothermal water heat exchange process

The invention discloses a corrosion scaling experiment detection system in a geothermal water heat exchange process. The system comprises a gradient heat exchange simulation system body. A gradient heat exchange simulation system upper cover plate is mounted at the top end of the gradient heat exchange simulation system main body; four corners of the gradient heat exchange simulation system uppercover plate are fixedly mounted with the gradient heat exchange simulation system main body through fixing nuts; a liquid inlet, an air inlet, an air outlet and a pH adjusting opening are formed in the surface of the gradient heat exchange simulation system upper cover plate. The surface of the gradient heat exchange simulation system upper cover plate is connected with a three-electrode system and a liquid phase monitoring device. The corrosion scaling experiment detection system is scientific and reasonable, safe and convenient to use, according to the invention, not only can the heat absorption process in liquid heat exchange be effectively simulated, but also the heat release process can be accurately simulated, the dynamic change of parameters such as temperature, flow velocity, pH value and gas content in the process can be accurately controlled, related conditions can be measured in real time, and corrosion scaling electrochemical results can be acquired.
Owner:韦正楠

Regenerating device for cyclone-type ultrasonic atomizing solution dehumidification

The invention discloses a regenerating device for cyclone-type ultrasonic atomizing solution dehumidification. The regenerating device comprises a regenerating container, a heat exchange heater and a dilute solution feed device, an air outlet and an air inlet are arranged on the regenerating container, a concentrated solution outlet is arranged on the lower portion of the regenerating container, the dilute solution feed device comprises a dilute solution incoming pipe and ultrasonic atomizers used for atomizing a dilute solution, and the ultrasonic atomizers are positioned inside the regenerating container and connected on the dilute solution incoming pipe. The regenerating device has the advantages that temperature of the dilute solution is increased by 5-10 DEG C more than air temperature, so that influence on mass transfer power between the solution and air due to the fact that a difference between steam partial pressure on the surface of the solution and that in the air is influenced caused by lowering of the temperature of the dilute solution in the process when steam gasifies and absorbs heat can be avoided. Low-grade heat energy is adopted, so that utilization of waste heat is facilitated.
Owner:上海誉德动力技术集团股份有限公司 +1
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