773results about "Sorption machines" patented technology

The invention discloses a cryogenic step-by-step preparation unit and process based on injection condensation and enhanced heat absorption in the technical field of absorption refrigeration. The cryogenic step-by-step preparation unit comprises a generation assembly, an evaporation absorption assembly, an injection assembly and a condenser. The evaporation and absorption assembly comprises a medium-pressure evaporator, a low-pressure evaporator, a medium-pressure absorber and a low-pressure absorber; the generating assembly utilizes a heat source to produce a cold source, the medium-pressure evaporator utilizes part of the cold source produced by the generating assembly to primarily cool a secondary refrigerant, and the low-pressure evaporator utilizes the remaining cold source discharged by the medium-pressure evaporator to cool the secondary refrigerant again. The condenser produces cold energy which is used as cold sources of the medium-pressure absorber and the low-pressure absorber respectively; the absorption type refrigerating unit is optimally designed, single-stage refrigeration is replaced by stage-by-stage refrigeration, the problem that the cost of single-stage refrigeration is too high due to the fact that equipment is too large is solved, and then application of the unit in the deep cooling scene is expanded.

The invention discloses an offshore multi-energy combined supply system based on constant-pressure compressed carbon dioxide energy storage and an operation method of the offshore multi-energy combined supply system. The system comprises a working medium storage device, a heat energy storage device, a charging process module, a gas-liquid conversion loop, a discharging process module, a cold energy supply module and a heat energy supply module. By improving the energy release process structure of the compressed carbon dioxide energy storage system, the pressure of high-pressure carbon dioxide is reduced to normal pressure after primary expansion, so that low-temperature cold energy is generated while power is generated, consumption of stored heat is saved, residual stored heat is used for heat supply, the comprehensive utilization rate of energy is increased, and combined supply of cooling, heating and power is achieved; the system further comprises an integrated thermally-driven combined cooling and power supply subsystem capable of switching power generation / refrigeration modes, organic Rankine cycle and jet refrigeration cycle are highly integrated, investment cost and space occupation are reduced, redundant heat energy is flexibly and efficiently converted into electric energy or cold energy, and the flexibility of multi-energy combined supply of the system is improved.

The invention discloses an energy-saving efficient refrigerating unit and process for preventing cavitation of a steam condensate pump in the technical field of refrigeration. The energy-saving efficient refrigerating unit comprises a high-pressure generator, a medium-pressure generator, a high-pressure evaporator, the steam condensate pump, a composite power generation compressor and a refrigerating assembly. Heat of saturated steam condensate flowing out of the high-pressure generator is absorbed by the high-pressure liquid refrigerant through the high-pressure evaporator, and the saturated steam condensate is changed into supercooled steam condensate, so that cavitation cannot be generated when the supercooled steam condensate enters the steam condensate pump, an original mode of increasing the height difference between the generator and the steam condensate pump is replaced, and the production efficiency is improved. The cost of a unit pipeline is reduced, meanwhile, the cost of ultrahigh transportation is reduced, heat contained in saturated steam condensate is converted into pressure energy of a high-pressure gaseous refrigerant to be used for driving a composite power generation compressor to work, the pressure energy is converted into electric energy and pressure energy of a low-pressure gaseous refrigerant, and the electric energy is used for a solution pump. The deep utilization of the internal energy of the unit can be realized, and the COP of the unit is improved.

The present application relates to a system and method for supplying cascade energy using waste heat from a power plant during production. The waste heat from the power plant during production is connected to a heat source inlet of a lithium-bromide absorption chiller and to a waste water inlet of a waste water heat exchanger, and a heat source outlet of the lithium-bromide absorption chiller is connected to the waster water inlet of the waste water heat exchanger and to a water return port of the waste heat from the power plant during production; the lithium-bromide absorption chiller is connected to a chilled water intake line, a chilled water output line, a cooled water intake line and a cooled water discharge line, the cooled water discharge line is connected to a clean water side inlet of the waste water heat exchanger, and a clean water side outlet of the waste water heat exchanger is sequentially connected to a water purification device and a hot water tank; the clean water side inlet of the waste water heat exchanger is connected to a heating water return line, and the clean water side outlet of the waste water heat exchanger is connected to a heating water supply line; and a water outlet of the waste heat from the power plant during production is further connected to a heat source inlet of a solution regenerator, and a waste water outlet of the solution regenerator is connected to the water return port of the waste heat from the power plant during production. The system of the present application has high energy utilization efficiency, thus effectively expanding the range of waste-water waste heat utilization.

The utility model relates to the technical field of acid pickling waste liquid resourceful treatment and regeneration, in particular to a tail gas waste heat utilization system of a mixed acid waste liquid treatment system, which is used for treating mixed acid waste liquid and discharging high-temperature tail gas and comprises a first heat exchanger, a second heat exchanger and a refrigerating mechanism. A first heat exchange circulating water path is arranged between the first heat exchanger and the refrigerating mechanism; the first heat exchanger provides a heat source for the refrigerating mechanism by using tail gas heat and reduces the water temperature of the first heat exchange circulating water path by means of the refrigerating mechanism; a second heat exchange circulating water path is arranged between the second heat exchanger and the refrigerating mechanism. The second heat exchanger is further connected to a circulating pipeline of the mixed acid waste liquid treatment system so as to reduce the temperature of circulating liquid. Through the tail gas waste heat utilization system, flue gas waste heat of the mixed acid waste liquid treatment system is effectively recycled, and energy waste is reduced; and the second heat exchanger reduces the circulating liquid temperature of the mixed acid waste liquid treatment system and improves the oxidation efficiency of the flue gas.

The invention discloses a multi-combined supply system and process based on absorption in the technical field of absorption refrigeration, and the multi-combined supply system comprises an absorption refrigeration unit and further comprises a composite combined heat and power generation assembly; the combined type combined heat and power generation assembly comprises a secondary generator, a medium-pressure evaporator, power generation equipment and a high-pressure absorber, the absorption type refrigerating unit is optimally designed, so that the absorption type refrigerating unit has the functions of refrigerating, heating, power generation and ice making at the same time, the absorption type refrigerating unit is still kept to run at a high load in winter or in the season with the low requirement for the cooling capacity, and the energy consumption is reduced. The problem that the utilization rate of low-grade waste heat is reduced during low-load operation is solved, meanwhile, the low-grade waste heat is converted into electric energy and heat energy, transition and upgrading of energy quality can be achieved, important strategic significance is achieved for energy conservation and emission reduction, the unit can achieve the cooling, heating, power and ice multi-combined supply function, and the energy conservation and emission reduction are achieved. And the application scene is greatly expanded, and the maximum economic benefit of the unit can be exerted.

A composite material for passive cooling includes a porous structure including an expanded graphite and a surfactant, the porous structure being provided with at least one crystalline deliquescent salt that is selected from the group consisting of chloride, bromide, sulphate, and nitrate. The uses of the composite material in passive cooling are also addressed.

The utility model discloses a compression condensing unit with waste heat recovery precooling, which comprises a compression type refrigerating system, an absorption type refrigerating system and a secondary refrigerant circulating system, and the absorption type refrigerating system comprises a waste heat generator, a second condenser, a second throttle valve, a second evaporator, an absorber and a solution pump. The secondary refrigerant circulating system comprises a secondary refrigerant loop and a heat exchanger, the hot side of the second evaporator and the cold side of the heat exchanger are connected in the secondary refrigerant loop, and the hot side of the heat exchanger is connected between the compressor and the first condenser; the second evaporator transmits cold energy into the compression type refrigerant system through a secondary refrigerant in the secondary refrigerant loop and the heat exchanger, and refrigerant steam before entering the first condenser is pre-cooled. Waste heat generated in industrial production is used for driving the absorption type refrigeration system, the condenser of the compression type refrigeration system is pre-cooled through cold energy provided by absorption type refrigeration, and the energy utilization rate is effectively increased.

The present disclosure provides a multipurpose multi-source heat-storing compressed air energy storage system and a method thereof, including a packed bed heat-storing device, a heat-storing circuit, a heat-releasing circuit, a gas-storing circuit, a photothermal circuit, a heating-supplying circuit and a cooling-supplying circuit, wherein the heat-storing circuit and the heat-releasing circuit are connected to the packed bed heat-storing device, respectively, and the heat-storing heat exchanger of the heat-storing circuit and the heat-releasing heat exchanger of the heat-releasing circuit are connected with the gas-storing circuit, respectively, the photothermal circuit is connected with the heat-storing circuit, the heating-supplying circuit is connected with the heat-releasing circuit and the photothermal circuit, the cooling-supplying circuit is connected to the packed bed heat-storing device and the photothermal circuit, the photothermal circuit heats the heat-storing circuit and the heat-releasing circuit.

The invention provides a self-adaptive variable multi-stage absorption refrigerating machine and a data center waste heat recovery cooling system. The refrigerator includes an evaporator; a condenser; the solution flow path switching module is used for adjusting the operation number of the absorption refrigeration subsystems; and at least two absorption refrigeration subsystems, in each of which the solution heat exchanger is simultaneously in fluid communication with the absorber and the generator. The mass coupling mechanism that refrigerant steam generated by a generator of the upper-stage absorption refrigeration subsystem directly enters an absorber of the lower-stage absorption refrigeration subsystem to be absorbed is utilized, a multi-stage absorption refrigeration cycle with the middle pressure gradient is constructed, and the temperature of an effective driving heat source is reduced to 45-50 DEG C. In addition, the solution flow path switching module is configured to dynamically reconstruct the solution flow path topology, and the unit can be adaptively and preferentially switched among multiple operation modes, so that efficient operation under the variable working conditions all the year round is kept.

A three-way heat exchanger operable to transfer heat between a heat transfer fluid, a liquid desiccant, and air. The three-way heat exchanger includes an airflow inlet, an airflow outlet, and panel assemblies arranged with airflow gaps defined between adjacent panel assemblies to allow the air to flow between the airflow inlet and the airflow outlet in an airflow direction. Each panel assembly includes a frame defining a heat transfer fluid channel for channeling a flow of the heat transfer fluid through the panel assembly and a membrane positioned on the frame and defining a desiccant channel for a flow of the liquid desiccant. The frame has a leading edge proximate the airflow inlet and a trailing edge proximate the airflow outlet. The leading edges of the frames of the panel assemblies each include a leading edge aerodynamic feature.

A solar environmental control system includes a solar powered apparatus and a heat transfer apparatus. The solar collection apparatus includes a solar collector for absorbing solar energy, a heat storage medium, and a generator. A heat transfer fluid circulates between the solar collector, the heat storage medium, and the generator.

The invention discloses an evaporation pressure reference controller for a lithium bromide absorption refrigeration system. The evaporation pressure reference controller comprises a pressure detection unit, a reference unit, a comparison unit and an execution unit. The pressure detection unit detects absolute pressure in the evaporator in real time; the reference unit provides a reference signal of the target evaporation pressure; the comparison unit outputs a pressure deviation signal; and the execution unit adjusts the circulation volume of the lithium bromide solution so as to approach to the solution circulation volume under the full-load design working condition of the system, and the adjustment benchmark is the full-load design working condition of the system. The evaporation pressure serves as an absolute physical reference, the solution circulation amount is dynamically adjusted, the system is made to adapt to the heat source load, the concentration automatically avoids the crystallization line, and the functions of load monitoring, crystallization early warning, energy efficiency calculation and the like are provided. And the device is suitable for various low-grade heat source scenes such as hot water, steam and flue gas, can be used for new machine manufacturing and stock transformation, and reduces the equipment size and the manufacturing cost.

The invention relates to the technical field of gas-fired boilers, in particular to a distributed energy system based on a gas-fired boiler and an operation method. A three-layer convolutional neural network model is adopted by a load prediction module of the intelligent control platform, a cooling, heating and power load prediction value is output through convolutional layer feature extraction and a full connection layer, and an energy scheduling module is combined based on a model prediction control algorithm, and the lowest system operation cost is taken as a target. State variables such as steam pressure and the opening degree of a fuel regulating valve are optimized in a rolling mode, the load prediction accuracy and the multivariable collaborative optimization capacity are improved, and steam emptying is reduced. A steam exhaust port of a low-pressure steam turbine of a double-shaft back pressure type steam turbine set is divided into two paths which are connected with a steam-water heat exchanger and an absorption refrigerator respectively, steam exhaust flow distribution is adjusted through an electric adjusting valve, a water heat storage tank and a lithium battery energy storage system are combined, cooperative control is conducted through an energy management gateway, heat is stored and released during heat load fluctuation, and charging and discharging are conducted in the valley-peak section of a power grid. The heat-to-electricity ratio adjusting range is widened, and insufficient heat supply is reduced.

The application relates to the technical field of solar power generation, in particular to a combined cooling, heating and power (CCHP) system. A first heat storage circuit is used for collecting solar energy and storing the solar energy as low-temperature heat energy; a second heat storage circuit is coupled with the first heat storage circuit and is used for converting the low-temperature heat energy into high-temperature heat energy and storing the high-temperature heat energy; a user heat circuit is coupled with the first heat storage circuit and / or the second heat storage circuit and is used for transmitting a heat source to a user heat end; a user cold circuit is coupled with the first heat storage circuit and / or the second heat storage circuit and is used for generating a cold source and transmitting the cold source to a user cold end; and a power generation circuit is coupled with the second heat storage circuit and is used for converting the high-temperature heat energy into electric energy. Through the synergistic integration of multi-stage energy storage, hierarchical heat coupling and multi-end energy output, the application realizes efficient and full-grade cascade utilization of solar energy, significantly reduces heat loss, meets the multiple demands of users for power generation, heat supply and refrigeration, greatly improves the overall energy utilization efficiency of the system and avoids resource waste.

The invention discloses a waste heat boiler power generation optimization method for a gas-steam combined generator set, and the method comprises the steps: deeply cooling the exhaust gas temperature to below 75 DEG C through a multi-stage anti-corrosion heat exchange device, and carrying out the heat exchange through an intelligent control heat medium water circulation loop; the recycled heat is distributed to natural gas preheating, refrigeration, heat supply, air preheating and the like according to the priority in a cascade mode. According to the system, efficient deep recovery and comprehensive utilization of flue gas waste heat are achieved, the energy efficiency and economical efficiency of the unit are remarkably improved, and safe and reliable operation of the system is ensured through intelligent anti-corrosion control.

The invention discloses a condensation pressure reference control method and device for an ammonia absorption type refrigeration system. The method comprises the following steps: establishing an absolute physical reference, namely a target condensing pressure, determined by ammonia physical properties, wherein the value is uniquely determined at a given condensing temperature; the condensing pressure is detected in real time; and with approaching as a target, working condition parameters of the ammonia purification device are adjusted, so that the purity of ammonia vapor entering the evaporator is close to 100%. The device is an electronic control or self-operated machine. According to the method, the condensing pressure is increased to be an active physical reference based on the double-rigidity constraint of fixed ammonia charge and determined condensing pressure, so that the system automatically approaches to a theoretical optimal state in a wide temperature range, the rectification fault risks such as tower flooding and tower flushing are remarkably reduced, the energy efficiency is improved, and the method is suitable for industrial waste heat recovery, refrigeration houses and other scenes.

The invention belongs to the technical field of gas turbine cooling, and particularly relates to a gas turbine cooling air multi-energy combined supply system. Comprising a multi-energy combined supply system, a gas turbine system and a transcritical Rankine cycle system, the gas turbine system and the transcritical Rankine cycle system are coupled through a TCA, cooling air in the multi-energy combined supply system is cooled through the TCA and then enters a gas turbine, and a medium in the transcritical Rankine cycle system absorbs heat in the TCA and then enters a turbine to expand and do work. Cooling water outside the system absorbs heat through a condenser in the transcritical Rankine cycle system to form high-temperature water, the high-temperature water supplies heat to a bromine cooling unit in the multi-energy combined supply system, and low-temperature water generated by the bromine cooling unit is atomized and then mixed with inlet air of an air compressor so as to reduce the inlet air temperature. According to the system, the combined cycle power generation efficiency can be improved, multi-energy combined supply and stable energy recovery of gas turbine cooling air can be achieved, and safe operation of a gas turbine cooling system is fundamentally guaranteed.

The invention provides a multi-mode combined cooling and power generation system based on efficient waste heat utilization and an operation method of the multi-mode combined cooling and power generation system. The multi-mode combined cooling and power generation system comprises an organic Rankine cycle and absorption type refrigeration cycle integrated low-grade cold energy production mode and an organic Rankine cycle and vapor compression type refrigeration cycle integrated medium-grade cold energy production mode. A high-grade cold energy production mode integrating organic Rankine cycle, absorption type refrigeration cycle and vapor compression type refrigeration cycle is adopted, in order to achieve gradient utilization of waste heat, the system considers the waste heat utilization sequence of thermodynamic cycle at the same time, and the waste heat is firstly utilized by the absorption type refrigeration cycle and then recovered by the organic Rankine cycle; waste heat is recycled through the organic Rankine cycle and then is utilized by the absorption type refrigeration cycle, and the waste heat is simultaneously recycled by the absorption type refrigeration cycle and the organic Rankine cycle after being shunted. Efficient cogeneration of cold electricity is achieved through gradient utilization of waste heat and heat-work coupling between circulation, multiple possibilities of a waste heat utilization path are considered, and the waste heat recovery rate is increased.

The invention relates to the technical field of carbon dioxide capture, and discloses a carbon dioxide capture system and a method for reducing energy consumption in the carbon dioxide capture process. The system comprises an absorption tower, a rich and lean liquid heat exchanger, a regeneration tower, a waste heat recovery refrigeration device, a regeneration gas cooler, a regeneration gas separator and a compressor which are sequentially arranged in the circulation direction of raw material flue gas containing CO2, wherein the absorption tower is used for enabling raw material flue gas containing CO2 to be in contact with an absorbent to obtain a rich solution; the lean and rich solution heat exchanger is used for carrying out heat exchange on the rich solution and a lean solution obtained at the bottom of a regeneration tower; and the waste heat recovery refrigerating device is used for carrying out waste heat recovery on regenerated gas at the top of the regeneration tower and uncondensed gas at the outlet of the compressor. According to the system, the waste heat recovery refrigerating device is adopted, so that power consumption and absorbent loss of the carbon dioxide system are reduced.

A thermal storage absorption refrigeration unit, including: a thermal storage device and an absorption refrigerating machine; an output end of the thermal storage device is connected to an input end of the absorption refrigerating machine. The excessive wind and solar power, along with electricity from the grid during off-peak hours, are stored in thermal storage device in the form of heat. These thermal storage device are configured to serve as the heat source for the absorption refrigerating machine. The thermal storage device can achieve an energy storage efficiency of 96%, offering advantages over battery storage, compressed air energy storage, and pumped hydro storage in terms of safety, efficiency, energy savings, and low upfront investment.

The invention belongs to the technical field of non-phase-change refrigeration, and particularly relates to a non-phase-change active refrigeration method and device based on salt solution precipitation and dissolution under pressure regulation and control and application. The saline solution is used for refrigeration, greenhouse gas is not generated, dependence on fluid media in the heat transfer process is avoided, and environmental protection and high efficiency are achieved. The device comprises a pressure driving device, a solution circulating system and a heat exchange system, hydrostatic pressure serves as power for driving salt to be separated out in a solution of the hydrostatic pressure, the dissolved salt is effectively and controllably recrystallized, and active controllability of refrigeration circulation is achieved. After the solution is pressurized to separate out crystals, heat released by the residual dilute solution is transferred to a hot end; after the pressure is released, the crystals are dissolved to absorb heat of the cold end, and refrigeration circulation is completed. The solution is a refrigeration material and a heat transfer medium, is similar to traditional gas compression refrigeration, does not destroy the ozone layer and has no greenhouse effect, efficient refrigeration is achieved, and meanwhile environment friendliness and sustainable development are facilitated.

This refrigeration cycle device that circulates a mixed refrigerant obtained by mixing an adsorbent into a refrigerant comprises: a low-pressure-side extraction unit (16); a compression unit (11); a discharge-side transport unit (12); a heat dissipation unit (13); a mixed refrigerant decompression unit (14, 17); and a heat absorption unit (15, 15a, 15b). The low-pressure-side extraction unit (16) extracts the refrigerant from the mixed refrigerant flowing out from the heat absorption unit (15, 15a, 15b). The compression unit (11) sucks in and compresses a gas-phase refrigerant extracted by the low-pressure-side extraction unit (16). The discharge-side transport unit (12), by using the pressure energy of a discharged refrigerant discharged from the compression unit (11), transports, to the discharge side to which the refrigerant discharged from the compression unit (11) is discharged, the mixed refrigerant flowing out from the low-pressure-side extraction unit (16).

Systems and methods are provided for providing regenerative heat to a sorbent material and subsequently recovering a majority of the heat. The system and method can be used, for example, for efficient and energy-saving direct capture of carbon dioxide (CO2) from the atmosphere or flue gas. The systems and methods include introducing steam generated by the evaporator into a reactor of the system to directly heat adsorbent material in the reactor and purge desorbed CO2 from the reactor using the steam. Condensed water in the reactor is discharged and returned to the evaporator. The steam and CO2 discharged from the reactor are introduced into a steam recompressor to increase their temperature, then introduced into a condenser or reboiler in which water is condensed and separated from CO2, and the latent heat transferred to the cooling water is recovered, optionally by using a jet ejector.

The invention discloses a gas turbine combined cycle cooling, heating, power and hydrogen combined supply system coupling high-temperature heat storage and phase change cold storage and an operation control method thereof, the system is composed of a power plant inner side subsystem and an outer side subsystem, the power plant inner side subsystem comprises a gas turbine combined cycle unit, a high-temperature heat storage unit and a steam collector, the split-flow heat storage of high-temperature exhaust smoke heat and the flexible allocation of high-temperature steam are realized; the system comprises a hydrogen production unit and a heat and cold supply pipe network, and is combined with a steam turbine, an absorption refrigeration device, a mechanical refrigeration device and a phase change cold storage device, so that efficient supply and gradient utilization in a multi-energy form are realized. The operation control method provided by the invention comprises the steps of parameter acquisition and demand prediction, steam distribution regulation and control, heat storage and heat release management, hydrogen production load regulation and waste heat coupling utilization, cold and heat energy regulation, cold storage balance and the like, and is assisted by layered optimization control of an energy management platform; and multi-energy cooperative supply and flexible peak regulation of electric power, heat energy, cold energy and hydrogen energy can be achieved.

The invention belongs to the technical field of building energy management and energy storage, and provides a building load transfer system and method based on graded phase change heat storage, in an energy storage stage, high-temperature hot water prepared by an electric heating device enters a graded phase change energy storage subsystem through a pipeline; in the heat supply stage, building return water is heated by the high-temperature energy storage unit and the low-temperature energy storage unit and then fed into the heat supply tail end; in the refrigeration stage, hot water output by the high-temperature energy storage unit drives the ammonia water absorption refrigerator to generate chilled water, then cooling is conducted through the heat supply tail end, and the high-temperature energy storage unit and the low-temperature energy storage unit are innovatively arranged in series; during energy storage, hot water sequentially releases heat according to the temperature from high to low, and return water sequentially absorbs heat according to the temperature from low to high during energy release and heat supply, so that temperature alignment and gradient utilization of heat energy are realized, loss in the heat transfer process is greatly reduced, and the overall energy utilization efficiency is remarkably higher than that of a traditional single-stage heat storage system; and the application of the phase change energy storage technology in building energy storage and energy utilization is promoted.

The invention discloses a novel compression-injection-absorption thermal coupling type refrigerating system and device, a solution loop between a generator and an absorber is driven by high-temperature waste heat of an outlet of a compressor, and a low-pressure-stage compression function is realized through a solution pump. A compressor is a key component in an electrically-driven compression refrigeration cycle, a two-stage compression refrigeration system is generally adopted in a refrigeration cycle with a lower evaporation temperature in order to reduce the evaporation pressure of a refrigerant and improve the cooling capacity grade, but in the refrigeration cycle, the negative pressure degree of a low-pressure stage is higher, so that the safe and economical operation of the two-stage compression refrigeration system is not facilitated. According to the system and the device, a compression type refrigeration cycle and an absorption type refrigeration cycle are coupled in a cascade serial connection mode through the ejector, and a novel compression-ejection-absorption thermal coupling type refrigeration cycle is constructed; and low-voltage-stage power consumption can be reduced, the operation reliability of low-voltage-stage equipment can be improved, and wide popularization and application prospects are achieved.

According to the marine adsorption type refrigerating device, a six-valve circulation technology is adopted, continuous cold supply to a cold using unit is achieved, high-temperature heat conduction oil for heat storage can be used as a heat source, the living quality on a ship can be flexibly and conveniently improved, and when a cold storage technology of a cold storage device is adopted, flexible adjustment can be conducted according to the low-load and large-load-change operation working conditions; the adsorption type refrigeration device is mostly in a running state close to full load in the working period, the service life of the device can be prolonged, and the expected social and environment-friendly benefits are obvious.

This invention relates to the field of liquid compressed carbon dioxide energy storage technology, specifically to a liquid compressed carbon dioxide energy storage system coupled with a high-temperature heat pump and a lithium bromide refrigeration unit. The system includes: a compressed carbon dioxide energy storage subsystem for storing and releasing electrical energy within the energy storage system; a high-temperature heat pump unit as an auxiliary energy storage device; a portion of the high-grade heat energy in a second heat storage tank being used by the lithium bromide refrigeration unit to generate cooling capacity during the energy release phase; another portion of the high-grade heat energy in the second heat storage tank being used by a hot water reheater to heat the stored hot water in the compressed carbon dioxide energy storage subsystem; and a lithium bromide refrigeration unit generating cooling capacity to liquefy low-pressure carbon dioxide in the compressed carbon dioxide energy storage subsystem and store the liquefied low-pressure carbon dioxide in a low-pressure carbon dioxide storage tank. By generating cooling energy through the aforementioned lithium bromide refrigeration unit, the liquefaction of low-pressure carbon dioxide in the compressed carbon dioxide energy storage subsystem is achieved, thereby solving the problem of large gas storage chamber volume in existing technologies.

The application provides a composite adsorption medium and an adsorption bed based on the composite adsorption medium, and a preparation method of the composite adsorption medium is as follows: S1, silica gel, metal organic framework material and a binder are uniformly mixed according to a mass ratio of 1:1:0.15 to obtain a mixed powder; S2, deionized water is heated to 60 DEG C, the mixed powder is added, and stirring is uniformly carried out, and then standing and cooling to room temperature are carried out to obtain a mixed solution; S3, a macroporous scale porous medium is prepared and pretreated to remove surface oxides; S4, the pretreated macroporous scale porous medium is immersed in the mixed solution, liquid accumulation in the pores is blown off, and the immersion is repeated for multiple times; and S5, drying treatment is carried out after the immersion. The application also provides the adsorption bed based on the composite adsorption medium, the adsorption bed has higher adsorption capacity, heat and mass transfer effects are better, and structural stability is good, and the adsorption bed can be applied to an adsorption refrigeration or dehumidification system, and system performance can be greatly improved.