293 results about "Lithium bromide" patented technology

The invention relates to a stable silk fibroin liquid condensation body, gel and a preparation method and application thereof, and belongs to the technical field of silk fibroin. The preparation method comprises the following steps: S1, dissolving silk fibroin in a lithium bromide solution, and then adding trypsin for incubation to obtain an enzyme-digested silk fibroin solution; and S2, performing low-temperature programmed centrifugal treatment including an induction stage, a nucleation stage and a liquid-liquid phase separation stage on the enzyme-digested silk fibroin solution, and cleaning to obtain the stable silk fibroin liquid-state aggregate, the method can reduce aggregate liquid drop aggregation and improve the particle size uniformity of the liquid drops.

The invention belongs to the technical field of solid-state batteries, and provides a lithium-sulfur-phosphorus-chlorine-bromine solid-state electrolyte, a preparation method thereof and an all-solid-state battery. The preparation method comprises the following steps: mixing lithium sulfide and phosphorus sulfide, and carrying out ball milling to obtain a lithium-sulfur-phosphorus ternary mixture; in protective gas, the lithium-sulfur-phosphorus ternary mixture, lithium chloride and lithium bromide are mixed and then subjected to ball milling, and a lithium-sulfur-phosphorus-chlorine-bromine mixture is obtained; and carrying out heat treatment on the lithium-sulfur-phosphorus-chlorine-bromine mixture in protective gas to obtain the lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte. The lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte provided by the invention not only improves the electrochemical stability, but also maintains the high ionic conductivity characteristic.

The invention provides silk fibroin gel and a preparation method thereof, and relates to the field of biological medicines.The preparation method comprises the steps that 1, degummed silk or regenerated silk fibroin is dissolved in a lithium bromide solution, and a silk fibroin solution is obtained; (2) adding a cross-linking agent and sodium hyaluronate into the silk fibroin solution, uniformly mixing, and incubating to obtain silk fibroin gel; wherein the use amount of the sodium hyaluronate is 2%-14% of that of the degummed silk or the regenerated silk fibroin. The silk fibroin gel prepared by the invention is stable in mechanical property, can be stably stored for a long time, and has excellent biocompatibility and filling property.

The invention discloses a chloride ion battery for realizing bromine / chlorine synergistic chemistry and a preparation method thereof, and belongs to the technical field of redox batteries. The chloride ion battery takes graphite paper coated with vanadium pentoxide and graphite as a positive electrode, wherein the mass ratio of the vanadium pentoxide to the graphite is (0.5: 1)-(2: 1); zinc foil is used as a negative electrode, and an electrolyte is a mixed aqueous solution of tetramethylammonium chloride and lithium bromide. A double-halogen system of a V2O5-graphite composite positive electrode is adopted, chlorine species are chemically stabilized through the action of bromine, BrCl is generated in the charging process to inhibit Cl2 formation, and meanwhile, the intercalation energy barrier of chlorine is reduced; according to the salt-in-water electrolyte based on tetramethylammonium chloride, an electrochemical window is expanded to 3.0 V, and BrCl hydrolysis is effectively inhibited. The high-voltage halogen ion battery prepared by the method can realize a 2.3 V discharge platform, provides a specific capacity of 600mAh g <-1 >, has a capacity retention rate of 90% after 200 cycles, and opens up a safe development path for the high-voltage halogen ion battery without toxic gas emission. In addition, the battery system is simple in structure and has remarkable cost benefits.

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 heating, in particular to a heating system based on waste heat recovery of a generator set, which comprises a waste heat collection unit comprising a plate heat exchanger and a cooling tower which are connected in parallel on a condenser circulating pipeline of the generator set, and a switching valve group is arranged between the plate heat exchanger and the cooling tower; the underground energy storage unit comprises a first mining and recharging well and a second mining and recharging well which are connected with the plate heat exchanger through a heat exchange pipeline, and the bottoms of the first mining and recharging well and the second mining and recharging well are thermally coupled through a high-heat-conduction filling layer; the heat pump unit comprises a lithium bromide absorption heat pump, and a low-temperature heat source inlet of the lithium bromide absorption heat pump is connected with an outlet of the plate heat exchanger and a water pumping pipeline of the first mining and recharging well in parallel. Compared with the prior art, the system has the advantages that the underground energy storage unit and the switching valve group are arranged to operate cooperatively and work cooperatively, heat supply safety is guaranteed, meanwhile, overground and underground integrated waste heat regulation, storage, release and control are achieved, and the stability, the regulation capacity and the energy comprehensive utilization efficiency of the system are improved.

The utility model discloses a split type multi-combined supply central air-conditioning system driven by solar energy, and belongs to the technical field of cooling and heating equipment. The system comprises a lithium bromide absorption refrigeration type host, a solar heat collector, a refrigeration water tank, a heating water tank, a plate heat exchanger, a fuel cell, a cooling tower, a wall-hanging stove and a fan pipe disc, wherein the lithium bromide absorption refrigeration type main machine absorbs heat energy provided by solar energy through lithium bromide, and the circulation process of refrigeration or heating is completed; water is heated by solar energy absorbed by the solar heat collector and fed into the heating water tank through a pipeline to be heated by the system. The plate heat exchanger is responsible for heat exchange between the lithium bromide absorption refrigeration host and the heating water tank; the fuel cell supplies power to the system, and the wall-hanging stove assists in heating the heating water tank. The cooling tower is used for dissipating heat of the lithium bromide absorption refrigeration host; cold water in the refrigeration water tank is dissipated into a room in an air mode through the fan pipe disc so that the system can conduct refrigeration.

The invention discloses a roof component based on evaporation and radiation collaborative cooling and preparation and construction thereof. The roof component breaks through the limitation of a single cooling mode through a multi-layer structure coupling evaporative cooling and radiation cooling technology. The reflective film specifically comprises a base layer, an evaporation radiation synergistic cooling material layer and a reflective protection layer. The synergistic material layer is formed by modifying polyacrylamide hydrogel through lithium bromide moisture absorption salt, titanium dioxide nanoparticles are embedded to improve the short-wave reflectivity and long-wave emissivity, and the synergistic material layer has the functions of radiation cooling and moisture absorption evaporation; the reflective protective layer is made of polyvinylidene fluoride-hexafluoropropylene copolymer, so that radiation cooling power is supplemented and pollution is prevented on the premise of moisture permeability; the heat entering a room is reduced by combining an evaporation radiation synergistic cooling material and a reflection protection material; by means of the roof component based on evaporation and radiation collaborative cooling, the limitation of cooling power can be broken through, the cooling effect is enhanced, and the purpose of building energy saving is achieved.

The utility model relates to the technical field of storage devices, in particular to a copper corrosion inhibitor storage device for a lithium bromide chilled water system, which performs position adjustment through an adjusting device, performs lifting adjustment through a lifting device and performs monitoring through the distance of a monitoring device relative to the storage device. The storage device is limited through the limiting device, and the copper corrosion inhibitor is stored through the storage device; comprising a console; the device further comprises an adjusting device, a lifting device, a monitoring device, a limiting device and a storage device, the adjusting device and the storage device are both installed on the operation table, and the lifting device, the monitoring device and the limiting device are all installed on the adjusting device. The adjusting device adjusts the position, the lifting device lifts, the monitoring device monitors the distance, the limiting device limits, and the storage device stores.

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 belongs to the technical field of hydrogen energy comprehensive utilization, and particularly discloses an electricity, cold and heat multi-combined supply comprehensive utilization system and method based on hydrogen energy, which comprises a hydrogen fuel cell system, a heat exchanger, a hydrogen internal combustion engine, a flue gas hot water type lithium bromide unit and a ground source heat pump system. Cooling water of the hydrogen fuel cell system cooling pipe network exchanges heat with first circulating medium of the heat system in the heat exchanger, high-temperature flue gas of the hydrogen internal combustion engine flue gas pipe network and cylinder jacket water of the cylinder jacket water pipe network exchange heat with the first circulating medium in the flue gas hot water type lithium bromide unit, and the second circulating medium of the cold system is cooled in the flue gas hot water type lithium bromide unit. The ground source heat pump system comprises a ground source heat pump unit, and is used for exchanging heat between low-temperature circulating water of the ground source heat pump rock-soil side and the first circulating medium. The application fully utilizes hydrogen energy, uses waste heat generated by hydrogen fuel cell and hydrogen internal combustion engine to generate electricity, heating and cooling, and realizes hydrogen energy cascade utilization.

The invention discloses a solid electrolyte and a preparation method thereof, a solid-state battery and electric equipment. The preparation method of the solid electrolyte comprises the following steps: S1, in an inert gas atmosphere, mixing lithium bromide, metal bromide and a solvent for reaction, and grinding after solid-liquid separation to obtain a precursor; s2, sequentially carrying out annealing I and annealing II on the precursor; an intermediate is obtained; and S3, mixing the intermediate and lithium halide, and carrying out ball milling to obtain the solid electrolyte, the temperature of annealing II is higher than that of annealing I; the annealing temperature of the annealing II is less than or equal to 400 DEG C. A self-adaptive interface layer with high ionic conductivity is generated in situ between the solid electrolyte and an electrode, and a primary gap between the electrode and the solid electrolyte and a new gap generated by lithium stripping are effectively filled, so that the defect of high impedance caused by poor interface contact is eliminated, the formation of lithium dendrites can be inhibited, and the service life of the lithium battery is prolonged. Further, the electrochemical performance of the solid-state battery is improved.

The utility model relates to a first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. Comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump, an internal circulation medium-temperature hot water system, pipelines, valves and the like, recycled low-temperature waste heat source heat is transferred to internal circulation medium-temperature hot water through the evaporator A and the absorber A. The internal circulation medium-temperature hot water enables the evaporation temperature of the evaporator B to be increased and the absorption pressure to be increased, so that the absorber B produces a high-temperature heat source. The generator and the condenser adopt independent cylinders, the pressure bearing capacity and the thermal displacement capacity of the unit are improved, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit expands the application field, realizes single-machine ultra-large type, reduces the total investment, and improves the comprehensive utilization rate of energy.

The invention belongs to the technical field of heating, and particularly relates to a heat exchange system and method for power plant low-temperature waste heat recovery heating, and the system comprises a power plant, a lithium bromide absorption heat pump unit and a shell-and-tube steam-water heat exchanger; through the lithium bromide absorption heat pump unit, heat exchange is conducted on heating return water and power plant steam, low-temperature waste heat of a power plant is recycled, and the heating return water is heated; heating return water exchanges heat with steam of a power plant through a shell-and-tube steam-water heat exchanger, and the heating return water is heated; heating return water and power plant steam are subjected to heat exchange through the lithium bromide absorption heat pump unit, low-temperature waste heat of the power plant is recycled, the heating return water is heated, then the heating return water and the power plant steam are subjected to heat exchange through the shell-and-tube steam-water heat exchanger, and the heating return water is heated again. The heating reliability and flexibility can be effectively improved, and the utilization rate of heating equipment is increased.

The invention discloses a system and method for comprehensive energy utilization of a thionyl chloride catalyst. The system comprises a thionyl chloride catalyst, a heat exchanger, a lithium bromide unit for cooling pure water, and a chilled water system. The outlet end of the thionyl chloride catalyst is connected to the heat exchanger via a pipeline, and gas with a certain amount of heat at the outlet of the thionyl chloride catalyst is directed into the heat exchanger. Pure water is provided in the heat exchanger for continuously passing through the heat exchanger to absorb heat in the gas. The output end of the heat exchanger is connected to the lithium bromide unit via a pipeline, and the output end of the lithium bromide unit is connected to the chilled water system. The invention overcomes the shortcomings of the prior art, recycles energy, reduces production costs, and significantly improves production efficiency. At the same time, the entire production process is optimized for reaction efficiency and material utilization, thereby increasing the economic benefits of the enterprise and having high social use value and application prospects.

The application discloses a two-stage first-type lithium bromide absorption heat pump machine with two-stage evaporators connected at the bottom, which comprises a condenser, a secondary generator, a high-pressure stage secondary absorber, a high-pressure stage evaporator, a low-pressure stage secondary absorber, a low-pressure stage evaporator, a primary generator, a primary absorber, a primary heat exchanger, a secondary heat exchanger and pipelines arranged between the components. The main feature of the machine set is that the low-temperature waste heat source is divided into two sections, the high-temperature coolant water enters the high-pressure stage evaporator after flashing, then enters the high-pressure stage evaporator liquid tank, and the amount of coolant water used in the high-pressure stage evaporator and the low-pressure stage evaporator is automatically distributed through the coolant water connecting pipe. After being divided into sections, the concentration difference of the solution circulation is increased, the heat exchange temperature difference is increased, the heat exchange area is reduced, the material cost of the machine set is reduced, the equipment investment cost is reduced, the machine set is beautiful in appearance, compact in structure, high in performance coefficient, more waste heat can be recycled, and the comprehensive utilization rate of energy is improved.

The present application belongs to the technical field of energy saving and resource utilization in titanium dioxide production, and particularly relates to a method and system for heat energy utilization of a titanium dioxide gas-powder system. The method is aimed at the problems of waste of high-temperature tail gas heat energy of the gas-powder system and high energy consumption for cold preparation in the front production process, and adopts a two-stage cooling and heat energy recovery mode of "lithium bromide refrigerating unit + cooling device". The specific steps are as follows: introducing the clean high-temperature tail gas at 220-240 DEG C after dust removal into the lithium bromide refrigerating unit, driving the preparation of cold water or ice water by using the heat energy thereof, and directly supplying the front titanium liquid freezing crystallization process; then, the tail gas enters the secondary cooling device for deep cooling to below 70 DEG C for standard emission, while the circulating water is heated to hot water at 45-55 DEG C for reuse in the water washing process. The present application realizes "waste heat" preparation of "cold" and recovery of low-level heat energy through heat energy cascade utilization, the system heat recovery rate is greater than or equal to 92%, the power consumption of the lithium bromide unit is only 1 / 10 or less of the traditional refrigeration mode, and the production cost is significantly reduced.

The invention relates to the technical field of multi-energy complementation and waste heat recovery, in particular to a lithium bromide heat pump regulation and control method for coupling solar photo-thermal and computing power waste heat. The method comprises the steps of data acquisition, model calculation, dynamic regulation and control and safety monitoring. The method comprises the steps of collecting multi-source operation data and inputting the data into a thermodynamic matching model; the method is characterized in that coupling heat source exergy efficiency and a thermal response time constant are solved, a flow regulation and heat source switching instruction is generated, and a generator is kept in a high-efficiency temperature range; meanwhile, the crystallization safety margin is calculated in real time, and the anti-crystallization process is triggered when the crystallization safety margin is lower than a threshold value; according to the method, the conversion from static threshold dependence to dynamic thermodynamic matching is realized, the problem of high-grade heat energy waste caused by source-load asynchronization is solved, and the thermodynamic perfection of the system is maximized.

The invention belongs to the technical field of biomass materials and green chemical engineering, and discloses a green preparation method and system of a high-porosity cellulose porous membrane based on solvent replacement. The invention aims to solve the problems that the pore structure is easy to dry and collapse, the solvent cost is high and the environment is not protected when the cellulose porous membrane is prepared in the prior art. The core of the method is that cellulose is dissolved in a lithium bromide aqueous solution, and a cellulose hydrogel network is formed through cooling solidification and washing regeneration; then, completely replacing the hydrogel by using a low-surface-tension alcohol or ketone solvent (such as tertiary butanol) so as to eliminate destructive capillary force in the drying process and maintain a porous structure; and finally, drying at normal pressure to obtain the high-porosity cellulose membrane. The core of the system is that a three-loop recycling system of lithium bromide and alcohol or ketone solvents is integrally designed, and near-zero emission and cyclic utilization of the solvents are achieved. The prepared cellulose porous membrane is high in porosity (50-80%) and controllable in structure, and the whole process is green, economical and suitable for large-scale production.

According to the lithium bromide refrigerating system, cooling water in a water outlet pipe is conveyed to a water inlet pipe through a bypass water inlet pipe and a bypass water outlet pipe in sequence through operation of a bypass pump, so that self-circulation that the cooling water flows back after being discharged from a lithium bromide unit is achieved; therefore, the cooling water is heated through heat generated by bypass return water circulation of the cooling water and circulation of equipment, the temperature of the cooling water is increased, the starting condition of the lithium bromide unit is met, stable operation of the lithium bromide unit after starting can be guaranteed in severe cold areas with low external temperature, the lithium bromide unit is protected, and the service life of the lithium bromide unit is prolonged. And the operation time of the lithium bromide unit is prolonged.

The invention discloses a cold-in-summer and hot-in-winter double-working-condition operation system based on a lithium bromide unit. The system comprises a lithium bromide absorption type refrigerating unit, a driving heat source output unit, a driving heat source recovery unit, a cooling tower set, a user water return pipeline, a user water supply pipeline and a condenser set. Under the summer refrigeration working condition, the condenser set is isolated and stopped, the cooling tower set and the lithium bromide absorption type refrigerating unit are matched for use to form a stable refrigerating system, and low-grade steam of a thermal power plant and steam provided by an electric steam boiler are mutually supplemented to serve as a heat source to drive refrigeration in summer; under the working condition of heat supply in winter, the cooling tower set is isolated and stopped, the condenser set and the lithium bromide absorption type refrigerating unit are used in cooperation to form a stable heat supply system, the condenser set uses heat supply network return water as cooling water to exchange heat with reversely-introduced exhaust steam, and the water temperature is increased from 46.96 DEG C to 75.9 DEG C through cascade heat exchange by utilizing the latent heat of recycled refrigerant steam, so that the heat supply system is formed. And waste heat of exhaust steam and latent heat of refrigerant steam are recovered to supply heat to a user side.

This invention discloses a low-temperature district heating and cooling system based on multi-heat flux reconfiguration theory. In the heat source station, the steam outlet of the first waste heat boiler is connected to both the working fluid inlet and the process steam pipe inlet of a medium-pressure ejector. The mixed fluid outlet of the medium-pressure ejector is connected to the working fluid inlet of a medium-low pressure ejector. The mixed fluid outlet of the medium-low pressure ejector is connected to a first branch point. The medium-pressure steam at the first branch point is divided into three paths: the first path outlet is connected to both the ejector fluid inlet of the medium-pressure ejector and the working fluid inlet of the low-pressure ejector; the second path outlet is connected to the steam-side inlet of the medium-low pressure steam-water heat exchanger; and the third path outlet is connected to the steam inlet of a single-effect lithium bromide absorption heat pump generator. The mixed fluid outlet of the low-pressure ejector is connected to the ejector fluid inlet of the medium-low pressure ejector. This invention employs multiple ejectors in series, a single-effect lithium bromide absorption heat pump, and a steam flash tank to achieve multi-grade, multi-heat flux reconfiguration optimization and efficient comprehensive utilization.

The application discloses a lithium bromide heat pump integrated composite generator-condenser and system based on a hollow fiber membrane, utilizes industrial waste heat as a high-temperature heat source, combines membrane heat mass transfer technology of the hollow fiber membrane, combines a generator and a condenser in a lithium bromide absorption heat pump, and forms an integrated composite generator-condenser structure. The industrial waste heat is used as a high-temperature heat source to heat a dilute lithium bromide solution, water vapor in the high-temperature lithium bromide solution penetrates into a water vapor layer through the hollow fiber membrane due to a steam pressure difference, and the water vapor is cooled by circulating cooling water to realize simultaneous heat and working medium transfer. The condensed water does work in an evaporator and enters an absorber to be sprayed and mixed with a concentrated lithium bromide solution, and then enters the integrated composite generator-condenser again to circulate. The composite generator-condenser discards a form that a traditional evaporator and an absorber are separated, greatly reduces a land occupation area of the equipment, simultaneously avoids medium transportation between the equipment, reduces heat loss, and improves a performance coefficient of the heat pump.

The invention provides a generator set waste heat utilization system and a control method, and relates to the technical field of efficient utilization of industrial waste heat, by establishing a continuous blow-down water vaporization proportion correction calculation formula and introducing a continuous blow-down sewage waste heat coefficient, high, medium and low states of continuous blow-down sewage waste heat are calculated, and the continuous blow-down water vaporization proportion correction calculation formula is established. Whether a low-pressure cylinder of the generator set exhausts air to supplement a heat source or not and whether an intermediate heat exchanger is used for achieving primary heating of heating return water are judged, efficient recovery of waste heat of the generator set in a generator and an evaporator of the lithium bromide heat pump unit is achieved through a waste heat utilization system and a control method, and it is guaranteed that the heating return water reaches the common heating required temperature; the impact on the waste heat utilization system caused by changes of the continuous sewage discharge rate, continuous sewage thermal parameters and the like is avoided, the discharged sewage waste heat is recycled to be used for the heating system, and the operation stability and reliability of the heating system using the discharged sewage waste heat are improved.

The present application discloses a low-temperature-resistant, high-voltage aqueous electrolyte, a preparation method thereof, and its application in planar micro-supercapacitors. The low-temperature-resistant, high-voltage aqueous electrolyte comprises a solvent, water, and a solute, lithium bromide; the molar mass ratio of the lithium bromide to water is not less than 5 mol / Kg. In addition, a certain amount of coagulant can be added to form a low-temperature-resistant, high-voltage hydrogel electrolyte. The low-temperature-resistant, high-voltage aqueous electrolyte prepared by this method has the advantages of a wide voltage window, high ionic conductivity, low-temperature resistance, high safety, and has broad application prospects. The low-temperature-resistant, high-voltage aqueous electrolyte can improve the operating voltage, energy density, low-temperature resistance, and safety of aqueous planar micro-supercapacitors.

The utility model discloses a heating and steam generating system coupled with waste heat resources of a data center, and belongs to the technical field of waste heat recovery of the data center. According to the utility model, the waste heat of the data center is collected through the waste heat recovery unit, and the heat of the waste heat is transferred to the lithium bromide heating unit through the low-temperature lithium bromide heat exchange device, so that the energy consumption of direct heating is reduced. Through the design of the multiple stages of heat exchange units, step-by-step utilization of heat is achieved, and the utilization efficiency of energy is improved. Different grades of steam are respectively stored through the high-temperature steam storage tank, the medium-low temperature steam storage tank and the hot water storage device, so that graded utilization of energy is realized; the lithium bromide heating unit provides heat energy for the multi-stage heat exchange unit, the lithium bromide heating unit utilizes waste heat, and the heat supply cost of the system is reduced. The technical problem that waste heat resources of the data center cannot be efficiently utilized in the prior art is solved.

The invention discloses a solid oxide hydrogen energy technology and chemical high-low energy coupling system. Steam generated by a chemical user is input into a solid oxide electrolytic tank to be electrolyzed to generate hydrogen and oxygen; hydrogen enters the tube bundle gas-liquid-gas generation and conversion device for heat exchange and then is cooled and supplied to a hydrogen user; saturated steam in the high-pressure gas-liquid separation device rises and enters the steam / gas heat exchange device; oxygen enters the steam / gas heat exchange device to exchange heat with saturated steam, and is supplied to an oxygen user after being cooled; the heated steam in the steam / gas heat exchange device enters the solid oxide electrolytic tank to enter the next cycle or enters the steam double-effect lithium bromide unit; cooling water generated by the steam double-effect lithium bromide unit enters a chemical user or is used for cooling oxygen and hydrogen for a hydrogen user and an oxygen user; the system has the advantages that energy gradient utilization and material flow closed circulation are achieved, energy is saved, and the energy utilization efficiency is improved.

The invention relates to the technical field of heating devices, and discloses a fuel gas absorption heat pump energy-saving heating device and method.The fuel gas absorption heat pump energy-saving heating device comprises a fixed base, a protective shell is fixedly connected to the upper surface of the fixed base, a display screen is installed on the outer wall of the protective shell, and a fuel gas burner is installed at the top of the protective shell; and the bottom of the gas burner is fixedly connected with a conveying pipeline. High-temperature fuel gas is conveyed to the absorption heat pump body through the fuel gas burner, a lithium bromide solution is heated through the generator to enable a refrigerant to be evaporated, heat is released in the condenser to heat heating circulating water, meanwhile, part of refrigerant steam is pressurized and heated in combination with the compressor, efficient heat conversion is achieved, and energy is saved. The evaporator, the compressor, the heat exchange tower and other assemblies work cooperatively and are matched with water flow control of the circulation assembly, stable operation of heating circulation is ensured, stable heating can be continuously provided for users, and the heating efficiency and effect are effectively improved.

Aspects of the invention relate to phase change materials which may be used for the cooling of air. In particular, the compositions are phase change materials comprising dimethyl sulfoxide, and a salt selected from the group consisting of: sodium nitrate, potassium nitrate, and lithium bromide. The phase change materials are designed for the efficient storage and release of thermal energy, by using them, heat and cold can be conserved during low-demand, night-time hours, taking advantage of lower energy rates. This stored energy is then released during peak demand times, reducing the strain on power grids and aligning with energy-saving strategies that capitalize on off-peak pricing.

A first water inlet pipe of a first titanium plate heat exchanger of the system is connected with a water taking well, a first water outlet pipe of the first titanium plate heat exchanger is connected with a first water inlet pipe of a second titanium plate heat exchanger, and a first water outlet pipe of the second titanium plate heat exchanger is connected with a recharge well. The second water outlet pipe is connected with a first water inlet pipe of a steam type lithium bromide heat pump unit, a first water outlet pipe of the steam type lithium bromide heat pump unit is connected with a second water inlet pipe of a second titanium plate type heat exchanger, and the second water inlet pipe is connected with a heat supply network water return pipe and a heat supply pipe. A second water inlet pipe of the first titanium plate type heat exchanger is connected with a heat supply network water return pipe, a second water outlet pipe is connected with a heat supply pipe, a third water outlet pipe of the steam type lithium bromide heat pump unit is connected with a drain cooler, and the first titanium plate type heat exchanger is connected with the drain cooler. And waste heat is fully recovered.