57results about How to "Good temperature matching" patented technology

The invention discloses a heat and humidity segmented treatment air-conditioning device and method combined with radiation cold supply. The device mainly comprises a cold water unit, an air treater, a radiation coil pipe, a water pump, an electromagnetic valve and a pipeline. In a system, chilled water obtained by the cold water unit is used for cooling and dehumidifying air, and is supplied to a ceiling or a floor radiation coil pipe for radiation cold supply to realize segmented treatment of heat and humidity loads in a room. The radiation coil pipe is used for supplying cold and bearing a part of sensible heat load in the room, and dehumidified supply air is used for bearing the other part of sensible heat load in the room and indoor humidity load and preventing a radiation surface from moisture condensation. Chilled water is segmentally applied to dehumidification and radiation cold supply, and the temperature difference between supply water and return water is about 7-10 DEG C. A refrigeration cycle of a water chilling unit is realized with a non-azeotropic refrigerant, and good temperature matching of chilled water and the refrigerant in the heat exchanger is realized by means of the temperature slippage characteristic of the non-azeotropic refrigerant, so that the performance coefficient of the unit is increased.

The invention discloses a component controllable two-stage condensation Rankine cycle power generation system utilizing LNG cold energy, and belongs to the field of liquefied natural gas cold energy power generation. The system comprises a first sea water pump, a second sea water pump, a first working medium pump, a second working medium pump, a mixer, a working medium evaporator, a membrane separation device, a first expansion machine, a second expansion machine, an LNG pump, a first-stage condenser, a second-stage condenser and a reheater. According to the system, step-by-step utilization ofthe LNG cold energy is realized; and the proportion of mixed working mediums in the two condensers can be regulated and controlled by the additionally arranged membrane separation device, the temperature matching degree in the heat exchange process can be further improved, the irreversible loss in the LNG cold energy recovery process can be reduced, the power generation efficiency is improved, meanwhile, the flexible applicability of the system under different working conditions is also improved, and therefore, the system can be widely applied to the field of LNG cold energy power generation.

The invention discloses an air source transcritical CO2 heat pump and a multi-melting-point phase change heat storage coupling heating system. The multi-melting-point phase change heat storage coupling heating system comprises a CO2 air source heat pump machine set, a first variable frequency pump, a high-melting-point phase change heat storage device, a user, a second variable frequency pump, a low-melting-point phase change heat storage device and a plurality of electromagnetic valves, wherein the secondary heat exchange side of a CO2 transcritical circular heat pump heating system is combined with the multi-melting-point phase change heat storage device; the low-melting-point phase change heat storage device is used for absorbing waste heat of return water, so that the temperature of the return water is reduced, and then the temperature of a working medium before a throttling valve and the throttling loss are reduced, thereby causing the temperature glide in the CO2 exothermic process to be in temperature matching with hot water very well and giving full play to the unique advantages of the CO2 transcritical circular heat pump heating system. In addition, when the peak value of electric power or the heat supply efficiency of the heat pump is relatively low, the system is switched into a heat release mode, and the heat of the phase change device is used for heat supply. The multi-melting-point phase change heat storage coupling heating system provided by the invention has the beneficial effects that the multi-melting-point phase change heat storage coupling heating system can operate and be controlled at different period of time during wave crest and wave trough of electric power, and then the comprehensive utilization performance of the heat pump machine set is improved.

The invention discloses a power and cold air combined supply system driven by a medium and low temperature heat source. The power and cold air combined supply system comprises a medium and low temperature heat source circulation system, an LNG cold energy utilization circulation system, a Kalina circulation system, an organic Rankine circulation system, an external ejection type refrigeration circulation system and an internal ejection type refrigeration circulation system; the Kalina circulation system is coupled with the medium and low temperature heat source circulation system through a boiler and a superheater; the organic Rankine circulation system is coupled with the medium and low temperature heat source circulation system through an ORC preheater, and the organic Rankine circulation system is coupled with the Kalina circulation system through an ORC evaporator; an ejection flow of an ejector of the internal ejection type refrigeration circulation system is medium-high pressure ammonia gas led out from a certain position in the middle of a turbine in the Kalina circulation system, and the ejected flow is a two-phase flow of an outlet of a first evaporator; and an ejection flow of an ejector of the external ejection type refrigeration circulation system is ammonia water at an outlet of a condenser in the Kalina circulation system, and an ejected flow is a two-phase mixture at an outlet of an evaporator.

The preparation steps of swelling fire retardant by covering mill run and gangue of bauxite by resin is showed as follows: reacting mill run and gangue of bauxite orderly with phosphorous and nitrogenous materials in milling and thinning process, then drying, calcining and covering a Al-P-N composite on the surface of the mill run and the gangue grain; then covering the covered gangue orderly with resin prepolymer and phosphate to obtain resin covered mill run and gangue of bauxite; mixing and reacting the product with styrene, diethylene phenyl, methanol or butanol, filtering, washing, drying the final product to obtain the swelling fire retardant. The invention accomplishes the utilization of industrial castoff of mill run and gangue of bauxite with simple technics and low cost, which is prone to industrialization. The prepared fire retardant has a swelling property with a thermal decomposition temperature more than or equal to 230 deg C, having greater compatibility with high polymer.The swelling property can be adjusted by controlling the covering times according to application requests.

The invention provides a variable-concentration directly-heated type heat pump water heater with flash evaporators and a working method thereof. The variable-concentration directly-heated type heat pump water heater with the flash evaporators comprises a main circulation loop, an air supplementing branch and a concentration adjusting branch, and the main circulation loop is formed by connecting acompressor, a condenser, a high-pressure liquid storage device, a subcooler, a first expansion valve, the flash evaporator, a first stop valve, a third stop valve, a second expansion valve and an evaporator; the air supplementing branch is provided with the flash evaporator and a second stop valve which are connected in sequence; and the concentration adjusting branch is formed by connecting a working medium supplementing expansion valve, a component separation and working medium storage tank, an air supplementing concentration adjusting valve and a liquid supplementing concentration adjustingvalve. According to the variable-concentration directly-heated type heat pump water heater, based on the principle of advantage complementation, enhanced vapor injection and working medium concentration adjusting technologies are comprehensively applied to the heat pump water heater, the low-temperature performance and annual comprehensive energy efficiency of the heat pump water heater can be remarkably improved, meanwhile, the applicable temperature range of the heat pump water heater is obviously widened, and the heat pump water heater further has the advantages of being simple in rectification structure, high in component separation efficiency, safe, reliable and the like.

The invention discloses an ammonia water working medium combined cooling heating and power system utilizing a medium-low temperature heat source and a working method thereof, and belongs to the technical field of medium-low temperature heat source recycling and power engineering. Ammonia water is adopted as a cycle working medium, Kalina cycle, ammonia water absorption refrigeration cycle and ammonia water absorption heat pump cycle are organically integrated to form the novel ammonia water working medium combined cooling heating and power system for the medium-low temperature heat source, andelectric energy, cold energy and heat energy can be provided for users. The system has three operation modes of power generation, cold power and heat power, for example, the power generation mode canbe operated in spring and autumn, the cold power mode can be operated in summer, and the heat power mode can be operated in winter in China. The system meets the requirements of users for different types of energy, gradient utilization of energy is achieved, and the energy utilization efficiency of the medium-low temperature heat source is improved.

The invention provides an adsorption type refrigerating system and method based on cooking fume discharging equipment. The refrigerating system comprises a desorption and adsorption device used for adsorption and desorption of a refrigerant, a heat releasing device and a heat absorbing refrigerating device. The desorption and adsorption device comprises an adsorption bed device and a smoke exhaust hood. The adsorption bed device comprises at least one adsorption bed and is arranged in the smoke exhaust hood, and the desorption and adsorption device is used for refrigerant adsorption and desorption. The heat releasing device is connected with the desorption and adsorption device and used for condensation of the refrigerant desorbed by the desorption and adsorption device. One end of the heat absorbing and refrigerating device is connected with the heat releasing device so as to receive the refrigerant output by the heat releasing device, and the other end of the heat absorbing and refrigerating device is connected with the desorption and adsorption device so as to provide the refrigerant for the desorption and adsorption device. The adsorption bed device of the adsorption type refrigerating system based on the cooking fume discharging equipment is combined with the smoke exhaust hood, heat gathering is achieved through the characteristics that a gas collecting hood (the smoke exhaust hood) is large in area and gets close to a heat source, and the equipment occupied space is saved.

The invention discloses a CO2 transcritical thermodynamic cycle electricity storage system, which comprises a heat pump circulation loop, a heat storage unit and a cold storage unit, wherein the heat storage unit and the cold storage unit are connected to the heat pump circulation loop, the heat pump circulation loop converts a working medium in the heat pump circulation loop into a high-temperature and high-pressure supercritical state and sends the working medium into the heat storage unit, the heat storage unit is internally provided with multiple sections of heat storage media, and a high-temperature and high-pressure supercritical working medium enters the heat storage unit and sequentially exchanges heat with each section of the heat storage media at an approximately constant temperature difference, so that heat energy is stored in the heat storage media. The invention further provides an electricity storage method of the CO2 transcritical thermodynamic cycle electricity storage system. In the heat exchange process of the high-temperature-end cycle working medium and the heat storage medium, good temperature matching in the heat exchange process of the high-temperature-end cycle working medium and the heat storage medium is achieved through the segmented heat exchange technology of mass flow adjustment and phase change heat storage medium conversion, and the heat exchange efficiency and the overall efficiency of the electricity storage system are improved.

The invention discloses a full-heat-regeneration Brayton cycle and absorption type refrigeration integrated electricity and cooling combined supply system. The system comprises a supercritical carbon dioxide Brayton cycle power generation system, a pre-cooling-boiler coupling heat regeneration module and an absorption type electricity and cooling combined supply system. The supercritical carbon dioxide Brayton cycle system is combined with the absorption type electricity-cooling combined supply system, low-pressure high-temperature side outlet carbon dioxide waste heat of a low-temperature heat regenerator outlet is fully utilized, heat is provided for the absorption type electricity-cooling combined supply system in combination with the pre-cooling-boiler coupling heat regeneration system, low-temperature waste heat of the low-temperature heat regenerator outlet can be fully utilized, and the heat utilization rate of the low-temperature heat regenerator outlet is improved. And meanwhile, a large amount of cooling water and a precooler required by the Brayton cycle are omitted, the investment cost of the high-temperature heat regenerator and the low-temperature heat regenerator is reduced, and the power generation efficiency of the Brayton system is improved.

The invention discloses a two-stage transcritical Rankine cycle power generation system using geothermal energy and belongs to the field of geothermal energy power generation. The system comprises a low pressure working medium, a high pressure working medium, a preheater, a low pressure working medium heater, a high pressure working medium heater, a low pressure expander, a high pressure expander, a condenser, a separator and a mixer. The whole power generation process comprises two portions: low pressure transcritical Rankine cycle power generation and high pressure transcritical Rankine cycle power generation, so that the geothermal energy is fully utilized, the irreversible loss of the process is reduced, the exergy efficiency is greatly enhanced, the output power and thermal efficiency are further relatively high, and the system can be widely applied to the field of geothermal energy power generation.

The invention provides an ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system and application. The ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system comprises an ejector, booster, and dual-supercooler series mechanical super-cooling cycline and a trans-critical CO2 dual-temperature-region cycle, which can mutually exchange heat; the trans-critical CO2 dual-temperature-region cycle comprises a CO2 low-temperature-stage evaporator, an outlet of the CO2 low-temperature-stage evaporator sequentially communicates with a CO2 low-pressure-stage compressor, a CO2 medium-pressure-stage compressor, a CO2 high-pressure-stage compressor, a heating medium side of a CO2 gas cooler, a heating medium side of the medium-temperature-stage cooling evaporator, a heating medium side of a low-temperature-stage cooling evaporator, a medium-temperature-stage gas-liquid separator, a low-temperature-stage gas-liquid separator and an inlet of a CO2low-temperature-stage evaporator. The ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system can reduce gas exhaust pressure of the compressor, reduces a pressure ratio ofthe CO2 compressor, improves isentropic efficiency, and prolongs the service life of the compressor.

The invention discloses a work and coldness co-production system and a method of recovering working medium effective ingredient refrigeration and relates to the medium and low temperature heat source using technical field. The work and coldness co-production system and the method of recovering working medium effective ingredient refrigeration are driven by medium and low temperature heat source and used ammonia water mixture as a working medium, organically integrates ammonia water working subcycle with ammonia water absorption refrigeration subcycle, achieves co-production of work and coldness, and improves use efficiency of the medium and low temperature source. The work and coldness co-production system and the method of recovering working medium effective ingredient are mainly characterized in that: firstly, gradient use of heat is achieved according to a temperature counterpart principle, a high temperature part of an outer heat source is used for work subcycle, a low temperature part of the outer heat source is used for refrigeration, and working subcycle heat extraction is also used for refrigeration subcycle; secondly, recovering power subcycle can further be used due to ammonia working medium containing turbine exhaust of the recovering power subcycle.

The invention discloses an ORC system and method for stepwise recycling low-grade heat and belongs to the field of energy saving. The system comprises a first pump (1), a second pump (5), a third pump (9), a first heat exchanger (2), a second heat exchanger (6), a third heat exchanger (10), a first gas-liquid separator (3), a second gas-liquid separator (7), a first expander (4), a second expander (8), a third expander (11), a mixer (12) and a condenser (15). The system belongs to a multistage organic Rankine cycle system and can efficiently and stepwise recycle a variable-temperature heat source; meanwhile, a pressure pump is arranged in front of each heat exchanger, so that better temperature matching in the heat exchange process of working mediums and the variable-temperature heat source is achieved, and available energy losses of the variable-temperature heat source can be effectively decreased. The system is suitable for recycling sunlight heat, geothermal energy, industrial waste heat, medium-low-temperature humid air and other low-grade heat energy.