41results about How to "Huge potential for energy savings" patented technology

The invention provides an improved genetic algorithm-based method for distributing and optimizing thermal and electrical load of a steam extraction and heating unit, and belongs to the technical field of energy saving and monitoring of a power station. The invention aims to distribute and optimize the thermal and electrical load of a plurality of heating units of the power station, optimally distribute the electrical load and the thermal load of the power station when the electrical load and the thermal load meet requirements of users, and reduce total energy consumption and save energy. An actual heat consumption and consumption difference curve of the unit is set, and a design heat consumption curve of the unit is obtained; the electrical load and steam extraction amount of each unit are acquired; and the electrical load and the steam extraction amount value of each unit are obtained based on the improved genetic algorithm when the total thermal consumption values of the units are minimum, and the electrical load, the steam extraction amount value optimal solution and the corresponding minimum total thermal consumption of each unit are output when the total thermal consumption values of the units are minimum by improving genetic coding and fitness function, and selecting, crossing and mutating the genetic algorithm under the condition that the optimization process meets constraint conditions. By the method, the speed of optimization process and accuracy of an optimization result are improved.

The invention belongs to the field of electronic security protection and discloses an intelligent window control system used for energy conservation and fire fighting. The objectives of energy conservation and fire fighting are achieved by utilizing Zigbee wireless technology and CAN (controller area network) bus technology to realize flexible combining of control nodes, utilizing a standby battery to realize normal working of the system during a power failure, realizing artificial control through a manual control box, an infrared remote control unit, a cellphone and a personal computer and detecting environment parameters through various sensors to realize automatic control of a window so as to improve daylighting, ventilation, heat radiation and smoke and dust discharging of a building. The intelligent window control system is composed of the window control nodes, a window controller, the infrared remote control unit, the personal computer, a main controller and the cellphone. The intelligent window control system has the advantages of low cost, low power consumption, safety, reliability and the like, and has huge energy saving potential. The window can be timely opened for smoke and dust discharging when a circumstance that smoke exceeds the standard is detected, so that the circumstance can be effectively reduced.

The invention belongs to the technical field of water heating devices, in particular to a drinking water heat exchange device and a drinking fountain which is provided with the heat exchange device. The drinking water heat exchange device and the drinking fountain are designed against the problem of waste of heat energy during the process from boiling drinking water to cooling the drinking water by people for drinking in the previous years. The drinking water heat exchange device of the invention allows water which is boiled by a heating component and supplementary cold water to be divided by the pipe wall of an inner pipe in an outer pipe and to carry out reverse flow by the arrangement of the inner pipe and the outer pipe, the heat exchange is carried by a dividing wall, the pre-heating of the cold water is carried out at the same time of reducing the temperature of the boiled water, thereby allowing the temperature to be gradually improved for easily boiling, the recovered heat energy is recycled in the continuous heating, thereby reducing the requirements on the power of the heating component; compared with the prior art, the drinking water heat exchange device has obvious energy-saving potential; the boiled water which is cooled after the temperature decrease can be directly drunk.

The invention discloses a dual-mode electric vehicle drive motor which relates to the field of drive of various electric vehicles. A point on an armature of a series exciter is taken to confirm a reference point of an extension line on which the armature of the series exciter simultaneously becomes an armature of an alternating-current generator; an alternating-current boosting winding is distributed in an armature groove of the series exciter; one end of the boosting winding is connected to the reference point of the series exciter, and the other end is connected to a rectifying circuit; by the method, alternating current the amplitude value of which is higher than power supply voltage on the series exciter is directly obtained; controllable rectification is applied to the alternating current; and the rectified alternating current is directly fed to a power supply. The method realizes control on the rotating speed of the series exciter and efficient conversion on energy at work, and the series exciter also realizes the function of the alternating-current generator, therefore, a system comprises a set of independent series exciter loop and function and also comprises a set of independent alternating-current generator loop and function, and the two modes coexist and are mutually restricted and influenced to form the dual-mode motor.

The invention discloses an aluminum electrolytic cell closed gas collecting device. At least two electrolytic chambers are formed inside an aluminum electrolytic cell through an anode and a cathode; the anode is a self-baking anode, and an anode paste discharging system is arranged above the anode; three groups of flue gas gathering pipelines are arranged on the aluminum electrolytic cell, the first-stage flue gas gathering pipeline directly communicates with an inner space of a cell body, the second-stage flue gas gathering pipeline extends to the position, above the anode, inside the cell body, and the third-stage flue gas gathering pipeline extends into the cell body and is in butt joint with an anode paste feeding port in the top of the self-baking anode through the anode paste discharging system; and the aluminum electrolytic cell is provided with a two layers of sealing structures including the outer sealing structure and the inner sealing structure. By means of the aluminum electrolytic cell closed gas collecting device, the centralized treatment and recovery of the exhaust gas and the waste heat generated by the aluminum electrolytic cell adopting the multiple continuous operation chambers are realized, the ultra-low controllable discharge of air pollutant in the electrolytic cell is realized, the heat preservation state of the electrolytic cell is improved, the heat loss of the electrolytic cell is reduced, and the energy efficiency level of the electrolytic cell is effectively increased.

The invention discloses an electricity generating device using multistage regenerative heat and remaining heat by thermal power machine set, comprising routing main steam turbine generator system and routine regenerative system and its characters lie in adding pressure reducing expanding container, steam jet, low pressure turbine, and small generator, etc., combining the steam jet and the pressure reducing expanding container to produce low pressure steam to drive the low pressure turbine, using drainage variable phase heat release of the regenerative system to produce low pressure steam, converting the low pressure steam heat energy into mechanical energy, converting the mechanical energy into electric energy through the small generator, and the lower pressure steam produced by drainage variable phase heat release can also serve as auxiliary steam source for heat users inside and outside power plant to feed heat to the users, and the working medium can return to the regenerative system, somewhat improving thermodynamic property of the regenerative system. It is an energy-saving, efficiency-raising measure.

The invention discloses a device for regulating the building environment by using city pipe gallery air. The device comprises a building, an air extracting chamber formed under the ground surface, a comprehensive pipe gallery under the city ground surface, and a vertical air supplying main pipe arranged on the ground surface; and an air extracting machine is mounted in the air extracting chamber,and the air extracting chamber communicates with the comprehensive pipe gallery through an air extracting channel under the ground surface. Air is cooled or heated by utilizing the underground pipe gallery air, so that the temperature of the air in the pipe gallery is lower than the ground temperature in summer and higher than the ground temperature in winter; then the threes modes that the air extracting machine directly extracts the pipe gallery air, or the pipe gallery air is utilized to be subjected to heat exchanging, or the pipe gallery air serves as the air source heat pump low-grade heat source are adopted to conduct heat supplying, ventilating and air regulating on the building, and thus the energy saving purpose is achieved. The device is environmentally friendly, and directly utilizes the city built pipe gallery, so that the capital cost that a tunnel needs to be built specially for utilizing tunnel air in the past is saved, and the initial investment is saved.

The invention discloses a heat multiplication type hot site heat exchanger unit belonging to the field of heat supply and heating. The invention has the technical characteristics that primary side heating medium is firstly connected with an absorption type heat pump unit to serve as a drive source on the basis that the existing intensive heat supply primary side heating medium is converted into secondary side hot water by a heat exchanger, and heat is obtained from the environmental heat source by the absorption type heat pump unit so as to realize the purpose of secondary side heat multiplication. The invention can directly utilize primary side hot water or steam as the heating medium to drive the absorption type heat pump unit to obtain heat from ambient air or water source environment to realize secondary side heat multiplication heat exchange; according to working condition variation, the outlet heating medium of the absorption type heat pump unit can be used to further heat the secondary side hot water flowing out of the absorption type heat pump unit. On the premise of ensuring the using function of the secondary side, the invention reduces primary network supply heat and heating medium flow of unit heating area so as to reduce the size of a heat supply network pipeline and lower primary energy consumption and transportation and distribution energy consumption thereof, so that the invention has obvious energy saving effect.

A micro-emission energy-saving high-pressure engine master device recycling heat of tail gas comprises a high-pressure air cylinder, a piston, a tail gas inlet pipe, a tail gas discharge pipe, an air inlet pipe, an air filter, an engine gas inlet pipe and a silencer. An inner pipe porous medium waste heat recycling accumulator pipe and an inner porous medium accumulator are arranged in the middle of a section from a high-temperature tail gas input pipe and a low-temperature waste gas discharge pipe. An outer pipe porous medium waste heat recycling heat accumulator pipe and an outer porous medium accumulator are arranged in the middle of a section from a fresh low-temperature air input pipe to a high-temperature air introducing engine gas input pipe, a high-temperature burning and ash removing electric heating rod is arranged in the middle of the inner pipe porous medium waste heat recycling accumulator pipe, a high-temperature electric heating burning controller and a power source are arranged outside the high-temperature burning and ash removing electric heating rod, a gas compressor is arranged at an input end of a high-temperature air introducing engine gas input pipe, and a high-temperature tail gas filter is arranged at an output end of the high-temperature tail gas input pipe. The micro-emission energy-saving high-pressure engine master device is applicable to an energy-saving engine.

An all-round ultrahigh-toxicity micro-emission energy-saving waste gas and liquid purifying pulse engine master device comprises a burning chamber, a tail pipe, a fuel inputter, a gas inlet pipe, a gas discharge pipe, a mixer, a feed valve, a gas inlet valve and a silencer. A waste gas and tail gas preheating porous medium heat accumulation pipe, a high-temperature porous medium heat accumulator, a heat energy utilization surface, the gas discharge pipe, an ultrahigh-toxicity waste gas and tail gas input pipe and a low-heat-value waste gas and tail gas pressurizer are arranged on a tail spraying pipe, and a high-temperature preheating burning chamber and a high-temperature steady burning burner are arranged on a high-temperature pulse burning chamber. A fresh oxygen-rich air input pipe, a high-temperature waste gas and tail gas and fresh oxygen-rich air input mixer, the high-temperature preheating burning chamber, the high-temperature steady burning burner, a high-temperature on-duty high-flame generator, a thin high-temperature high-energy fuel reheating pipe, a high-temperature high-energy fuel pulse ejector, a thin high-temperature waste liquid water and accelerant reheating pipe and a high-temperature waste liquid water and accelerant pulse ejector are arranged on the high-temperature pulse burning chamber. The all-round ultrahigh-toxicity micro-emission energy-saving waste gas and liquid purifying pulse engine master device is used in the field of waste gas and liquid purification.

The invention relates to an electrostatic dust suppression device of a belt conveyor. The electrostatic dust suppression device comprises a metal barrel, a circulating fan, a rapping device fixed on the metal barrel (7) and a plurality of mutually connected cathode electrodes (3) distributed on different parts in a sealed cavity, wherein the metal barrel covers the upper portion of a belt (8) and forms the sealed cavity together with a belt conveying frame (1). High voltage is applied between the cathode electrodes and the metal barrel (7) serving as an anode and used for electrostatic adsorption of raised dust. The circulating fan (5) is used for disturbing dust-containing air flow in the sealed cavity. The rapping device is used for dropping accumulated dust from the cathode electrodes (3) and the inner wall of the metal barrel (7). The cathode electrodes (3) are star-shaped. The invention also provides a method for controlling the electrostatic dust suppression device. The electrostatic dust suppression device has the advantages of being good in dust suppression effect and saving energy.

The invention discloses a double-fed system-based electric induced draft fan system of a direct air cooling unit. The electric induced draft fan system comprises an induced draft fan, a double-fed motor, an air cooling island and the like. An electric induced draft fan is changed into a steam-electricity double-drive mode, and the induced draft fan is additionally arranged to drive a small steam turbine and a condensing device; and a motor is changed into the double-fed motor. On the premise that the working power consumption of the induced draft fan is met, the double-fed motor is automatically converted into a generator state, the residual power of the small steam turbine is converted into electric energy and merged into an auxiliary power system, the power supply capacity of the unit is improved, and the electric energy generated by the double-fed motor is 50Hz and can be directly connected to the internet; and when the small steam turbine breaks down and the double-fed motor operates as a motor, the rotating speed of the induced draft fan can be directly adjusted, so that the operation condition of the induced draft fan is adjusted. Through implementation of the double-fed system-based electric induced draft fan system of the direct air cooling unit, all operation requirements of the induced draft fan can be met, the station service power consumption rate is reduced, the adjusting efficiency and the adjusting safety of the induced draft fan in a future high-frequency sub-wide load application scene are improved, and huge energy-saving potential is achieved.

The invention relates to an intelligent heat load distribution control system and method for multi-unit cooperative heat supply. The intelligent heat load distribution control system comprises a cooperative heat supply mode input module which is used for obtaining the cooperative heat supply mode input of each heat supply unit according to the electric load and flow set value of each heat supply unit; the heat supply flow total demand quantity calculation module is used for calculating the heat supply flow total demand quantity according to the cooperative heat supply mode input of all the heat supply units, the heat supply flow total demand quantity is calculated; the cooperative heat supply unit heat supply flow distribution module is used for calculating a heat supply flow distribution value of each heat supply unit according to the heat supply flow total demand quantity, the load percentage of all heat supply units and cooperative heat supply mode input; and the unit heat supply flow control module is used for obtaining a pressure reduction regulating valve instruction of each heat supply unit according to the heat supply flow distribution value, the heat supply actual flow and cooperative heat supply mode input of each heat supply unit. According to the intelligent heat load distribution control system and method for multi-unit cooperative heat supply, the reliability and safety of the heat supply system can be improved, and it is guaranteed that the quality of steam for external heat supply is qualified.

The invention provides an improved genetic algorithm-based method for distributing and optimizing thermal and electrical load of a steam extraction and heating unit, and belongs to the technical field of energy saving and monitoring of a power station. The invention aims to distribute and optimize the thermal and electrical load of a plurality of heating units of the power station, optimally distribute the electrical load and the thermal load of the power station when the electrical load and the thermal load meet requirements of users, and reduce total energy consumption and save energy. An actual heat consumption and consumption difference curve of the unit is set, and a design heat consumption curve of the unit is obtained; the electrical load and steam extraction amount of each unit are acquired; and the electrical load and the steam extraction amount value of each unit are obtained based on the improved genetic algorithm when the total thermal consumption values of the units are minimum, and the electrical load, the steam extraction amount value optimal solution and the corresponding minimum total thermal consumption of each unit are output when the total thermal consumption values of the units are minimum by improving genetic coding and fitness function, and selecting, crossing and mutating the genetic algorithm under the condition that the optimization process meets constraint conditions. By the method, the speed of optimization process and accuracy of an optimization result are improved.

The invention belongs to the field of built environment and energy application projects, and provides a personalized heating method based on the ergonomics and an implementation device thereof. The implementation device comprises an under-table radiant heating unit, a table-top contact-type heating unit and a blanket-type heating unit. The under-table radiant heating unit is formed by overlaying a thermal insulation layer, an emission layer, a first electrothermal film and a shell in sequence. The table-top contact-type heating unit is formed by overlaying a thermal insulation layer, a second electrothermal film and a thermal storage waterproof layer in sequence. The blanket-type heating unit is formed by a third electrothermal film and a textile material. By means of the personalized heating method based on the ergonomics and the implementation device thereof, ergonomical research results obtained for a long time can be applied to winter heating schemes for an office environment or a learning environment, and the common problem that a user feels cold in lower limbs and too hot in the head in air-conditioner heating is solved. The implementation device is reasonable in design and simple in structure; because heat is supplied to only a local working area of the user instead of the large space in a whole room, air-conditioning energy consumption can be greatly decreased, and the implementation device has significant energy saving potential.

The invention discloses an efficient and energy-saving regenerative heating furnace, belongs to the technical field of heating for workpiece forging, and aims to solve the problems that the energy consumption of an existing heating furnace is high and the pollution caused by waste gas is severe. The efficient and energy-saving regenerative heating furnace comprises a regenerative chamber and burners as well as further comprises a reversing valve, wherein the burners used for preheating air and absorbing redundant heat communicate with the left and right ends of the regenerative chamber correspondingly; a connecting pipe communicates with the reversing valve and the burners; an air intake pipe and an exhaust pipe also communicate with the reversing valve; and heat accumulators are arranged in the first burner and the second burner. After the heat accumulators are heated, air is introduced, heated to high temperature, and then supplied to the burners for mixed burning with fuel; the regenerative burning effect is achieved; the adoption of regenerative chambers in pair is necessary, one regenerative chamber is used for heating air, and the other regenerative chamber is heated by flue gas; the energy-saving potential is huge and 30-70% of energy can be saved; the higher the using temperature is, the more obvious the energy-saving effect is; and meanwhile, the emission of greenhouse gas in the atmosphere is greatly relieved.

The invention discloses a countercurrent tube bundle type wall-type heat exchanger, which is formed by connecting 1 to 50 heat exchange units in series; and 1 to 65 rows of total 2 to 200 hot fluid tubes and cold fluid tubes which are opposite in flow directions and alternately arranged parallelly are arranged in each heat exchange unit; the hot fluid tubes and the cold fluid tubes are filled with flow around bodies; a heat insulating gasket is arranged between two heat exchange units and a connecting part of the two heat exchange units; and heat exchange units at the head and at the tail arerespectively communicated with cold and hot fluid splitter / mergers arranged at two ends. The countercurrent tube bundle type wall-type heat exchanger has the advantages of strong heat exchange capacity, high structural strength, compact equipment, small occupied space, low operating cost, obvious energy-saving potential, and convenient disassembly, cleaning and maintenance, and can be widely applied to industrial processes such as heating, cooling, condensing and evaporating in industrial departments such as chemical engineering, petroleum, foodstuff, metallurgy, machinery, light industry, electric power, shipping, papermaking, mines, medicaments, and concentrated heat supply.

The invention relates to the technical field of gas furnaces, in particular to a gas furnace pipeline structure and a four-section combustion technology. An existing gas furnace is serious in heat loss. The gas furnace pipeline structure comprises a furnace body, the furnace body is connected with an air pipeline and a gas pipeline, and the air pipeline comprises a first air inlet pipe and a second air inlet pipe. The first air inlet pipe and the second air inlet pipe are separately provided with a regenerative burner, a reversing valve and a hot air butterfly valve, the gas pipeline comprisesa gas inlet, a first gas pipeline, a second gas pipeline and a gas outlet, the second gas pipeline is provided with a soft fire gas valve, and the first gas pipeline is provided with a big fire gas valve. Energy conservation and emission reduction are achieved, and good development prospects are realized in the technical field of gas furnaces.

The invention relates to a waste heat recycling device of a transformer substation. The waste heat recycling device comprises a housing, a water heater, a re-cooler, an air feeder, an expansion valve,a compressor and an evaporator, wherein the top of the housing is connected with a guide air tube; a horizontal sealing partition is arranged in the housing; the water heater is arranged below the sealing partition; the water heater is connected with a water inlet and a water outlet tube; an air inlet is formed in the periphery of the housing; the re-cooler is arranged above the air inlet; the air feeder is arranged above the re-cooler; one side of the air feeder is equipped with the expansion valve, and the other side of the air feeder is equipped with the compressor; the evaporator is arranged above the air feeder; the water heater is connected with the compressor through a refrigerant pipe; the cooler is connected with the water heater through a refrigerant pipe; the expansion valve isconnected with the re-cooler through a refrigerant pipe; the evaporator is connected with the expansion valve through a refrigerant pipe; and the compressor is connected with the evaporator through arefrigerant pipe. The waste heat recycling device of the transformer substation is utilized for effectively recycling radiated equipment heat in the transformer substation, so that the environment temperature of the transformer substation is controlled within a reasonable range; and recycled waste heat directly heats cold water, so that the heated cold water is supplied to a corresponding servicearea to use.

The invention discloses a waveform separation rotary fly ash burnout device, which comprises a first air connecting pipe, a second air connecting pipe, an air lance and a plurality of cyclone air nozzles. Folded plates respectively comprise a first wing and a second wing; the first wings are respectively longer than the second wings; the folded plates are respectively and obliquely arranged at highest points of a front arch of a chain-grate boiler in a structure that the first wings are respectively lower than the second wings; both ends of each first wing and both ends of each second wing are respectively and fixedly arranged on two side walls of the chain-grate boiler to form a suspension space burning zone together with the front arch of the chain-grate boiler, a rear arch of the chain-grate boiler and the two side walls of the chain-grate boiler; the air lance is welded at the upper edges of the second wings; both ends of the air lance horizontally extend to pass through the two side walls of the chain-grate boiler to be respectively connected with the two air connecting pipes; and the cyclone air nozzles are evenly arranged in the length direction of the air lance located in the chain-grate boiler. According to the waveform separation rotary fly ash burnout device disclosed by the invention, the problems that the combustible gas content is high and the carbon content in fly ash is high in flue gas of the coal chain-grate boiler, the heat efficiency is low and black smoke is emited from a chimney are solved.

The invention discloses a building heat supply system based on a porous medium-hydrated salt composite energy storage material. The building heat supply system comprises a heat source link, a thermal battery device, a first air-air heat exchanger, a second air-air heat exchanger, a humidifying device, a building user side fan, an energy storage / release side fan and a building user, wherein the thermal battery device is a core component of the system and is filled with the porous medium-hydrated salt composite energy storage material. The thermal battery building heat supply system based on the porous medium-hydrated salt composite energy storage material has the outstanding advantages of being large in energy storage density, good in heat and humidity stability, small in heat loss and the like, and the compactness of the system / device can be improved easily; the problem of space-time mismatching between an energy supply side and a demand side can be well solved; and maximum utilization of low-grade heat energy can be realized, heat supply energy consumption and the operation cost of the building user are effectively reduced, the energy-saving potential is huge, and the economic benefit is obvious.

The invention belongs to the field of electronic security protection and discloses an intelligent window control system used for energy conservation and fire fighting. The objectives of energy conservation and fire fighting are achieved by utilizing Zigbee wireless technology and CAN (controller area network) bus technology to realize flexible combining of control nodes, utilizing a standby battery to realize normal working of the system during a power failure, realizing artificial control through a manual control box, an infrared remote control unit, a cellphone and a personal computer and detecting environment parameters through various sensors to realize automatic control of a window so as to improve daylighting, ventilation, heat radiation and smoke and dust discharging of a building. The intelligent window control system is composed of the window control nodes, a window controller, the infrared remote control unit, the personal computer, a main controller and the cellphone. The intelligent window control system has the advantages of low cost, low power consumption, safety, reliability and the like, and has huge energy saving potential. The window can be timely opened for smoke and dust discharging when a circumstance that smoke exceeds the standard is detected, so that the circumstance can be effectively reduced.

The invention mainly discloses a membrane separation and heat drive combined absorption type heat pump. The membrane separation and heat drive combined absorption type heat pump comprises a membrane separation device, an isobaric exchange type energy recovery device, a heat drive generator and the like. The membrane separation device is connected to an absorber through the isobaric exchange type energy recovery device. The absorber is returned into the membrane separation device through the isobaric exchange type energy recovery device. The heat drive generator is connected to the absorber sequentially through a condenser and an evaporator. The absorber is returned into the membrane separation device through a solution boosting pump. According to the structure, a refrigerating device for combining the membrane separation, the heat drive and the energy recovery is designed, after an absorption type solution is subjected to efficient primary non-phase-change separation through a reverse osmosis membrane separation technology at the low-concentration section, then gas-liquid separation is conducted through the heat drive generator, the heating amount required by the following gas-liquid separation and the cooling amount of liquid condensed by the following gas are reduced greatly in the primary non-phase-change separation process, the energy is saved greatly, and the membrane separation and heat drive combined absorption type heat pump has the great energy-saving potential.

The invention discloses a dual-mode electric vehicle drive motor which relates to the field of drive of various electric vehicles. A point on an armature of a series exciter is taken to confirm a reference point of an extension line on which the armature of the series exciter simultaneously becomes an armature of an alternating-current generator; an alternating-current boosting winding is distributed in an armature groove of the series exciter; one end of the boosting winding is connected to the reference point of the series exciter, and the other end is connected to a rectifying circuit; by the method, alternating current the amplitude value of which is higher than power supply voltage on the series exciter is directly obtained; controllable rectification is applied to the alternating current; and the rectified alternating current is directly fed to a power supply. The method realizes control on the rotating speed of the series exciter and efficient conversion on energy at work, and the series exciter also realizes the function of the alternating-current generator, therefore, a system comprises a set of independent series exciter loop and function and also comprises a set of independent alternating-current generator loop and function, and the two modes coexist and are mutually restricted and influenced to form the dual-mode motor.

The invention discloses an electric front water feeding pump system of an indirect air cooling unit based on a doubly-fed system. The electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system comprises a steel structure indirect air cooling tower and the like. According to the electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system, a motor of the electric front water feeding pump is changed into a doubly-fed motor, and the rotating speed of the electric front water feeding pump is adjusted through the doubly-fed motor, and the operation working condition of the electric front water feeding pump is adjusted under the condition that the requirement for safe operation of the water feeding pump is met when the working condition of a unit changes; when the speed regulation function of the doubly-fed motor fails, the doubly-fed motor operates at power frequency, and the electric front water feeding pump temporarily operates at a constant speed; the speed regulation range of the doubly-fed motor is set according to the accurate rotating speed range of actual operation of the electric front water feeding pump instead of 0-100%, waste of regulation allowance is avoided, and the manufacturing cost is low. By implementing the electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system, all operation requirements of the electric front water feeding pump can be met, the adjusting efficiency and the adjusting safety of the electric front water feeding pump in a future high-frequency wide-load application scene are improved, and the energy-saving potential is huge.

The invention discloses a low-resistance and high-efficiency combined type fresh air filtering system. The low-resistance and high-efficiency combined type fresh air filtering system comprises a freshair filtering box body (1), an air inlet pipe (2), an air inlet guide vane (3), a plate filter (4), a bag filter (5), a pleated filter (6) and an air outlet pipe (7) which are connected in sequence,outdoor polluted fresh air enters the filtering box body (1) through the air inlet pipe (2), is filtered by the plate filter (4), the bag filter (5) and the pleated filter (6) in a combined mode, andthen is sent into indoor space from the air outlet pipe (7). According to the low-resistance and high-efficiency combined type fresh air filtering system, through the combined filtering mode of the plate filter, the bag filter and the pleated filter, the dust content is mainly distributed in the plate filter and the bag filter with larger dust content and lower resistance, and the pleated filter ensures the high-efficiency filtering performance of the whole filtering system so as to realize the high-efficiency filtering performance with ultra-low resistance, and huge energy saving effect is brought in the operational process.

The invention relates to the technical field of air conditioning systems, in particular to a multi-split air conditioning system which comprises an outdoor unit, an indoor unit and a fresh air ventilator. The outdoor unit is integrated with a compressor and a condenser, the compressor is of a double-suction-inlet design, and the outdoor unit is provided with a first suction inlet, a second suction inlet and an exhaust port; the first suction inlet communicates with a low-pressure cavity of the compressor, and the second suction inlet communicates with a medium-pressure cavity of the compressor; and the exhaust port is connected with the condenser, the indoor unit is connected with the first suction inlet of the compressor, the fresh air ventilator is connected with the second suction inlet of the outdoor unit, and the exhaust port is connected with expansion valves of the indoor unit and the fresh air ventilator. The operation energy efficiency of the multi-split air conditioning system is improved, so that the energy-saving performance of the multi-split air conditioning system is improved.

The invention relates to the technical field of desalting of seawater or brackish water, and discloses a method for desalting seawater or brackish water. The method includes S1, blowing wet carrier gas through the seawater or brackish water and humidifying the seawater or brackish water until the seawater or brackish water is saturated; S2, absorbing moisture in the wet carrier gas by a material with electro-endosmosis and moisture absorption abilities; and S3, realizing an electro-endosmosis effect in the material with the electro-endosmosis and moisture absorption abilities by the aid of an electric field generated by a cathode and an anode, and draining the moisture absorbed by the material in a liquid form to obtain liquid fresh water. By the aid of the method, the purpose of desalting the brackish water effectively and continuously at low cost can be achieved, required external voltage is low due to operation under constant pressure, large quantities of latent heat of vaporization provided by heating and condensing links for water vapor are omitted, and energy conservation potential is remarkable; water which is a raw material does not need to be pretreated, scaling tendency of equipment is low, and the equipment is applicable to different types of water; and the equipment is installed flexibly and is convenient to operate and maintain.