1846 results about "Cold area" patented technology

The invention aims to provide a heating system of a power battery of a pure electric automobile and a control method thereof, which are used for eliminating the influence of low temperature on the performance of the power battery of the pure electric automobile to ensure that the pure electric automobile can be used in severe cold areas in winter. The heating system comprises a battery heating device which is arranged in a battery pack, wherein the battery heating device is provided with a hollow radiating fin; and the radiating fin is provided with a water inlet and a water outlet. The heating system is characterized by also comprising an auxiliary heater, wherein the auxiliary heater is connected with a fuel supply device; a heat exchanger is arranged in the auxiliary heater; the water inlet of the heat exchanger is communicated with the water outlet of an expansion water tank by a water pump and a water pipe; the water outlet of the heat exchanger is communicated with the water inlet of the radiating fin by an electric control valve; the water outlet of the radiating fine is communicated with the water inlet of the expansion water tank; the electric control valve, the auxiliary heater and the water pump are connected with a vehicle controller and are controlled by the vehicle controller; and the vehicle controller is also connected with a battery management system.

In a secondary battery which is poor in battery properties at a low temperature, by making the temperature of the secondary battery in a state of the largest discharge capacity, a secondary battery which can be used under a condition such as a cold district is obtained. A cell of the battery is configured in a sheet form, and the cell is provided with a heat generation unit capable of generating heat by carrying a current. According to this configuration, the battery can be used at a temperature with good capacity properties regardless of the ambient temperature environment. In particular, in an organic electrolytic liquid-free polymer electrolyte or solid electrolyte-containing lithium ion secondary battery which is high in energy density but poor in battery properties at a low temperature, a sufficient battery performance can be brought out regardless of the temperature environment.

The invention discloses foam concrete and a preparation method thereof. The foam concrete comprises a gelling material, light aggregate, water, admixture and foaming agent. The preparation method comprises the following steps: (1) pre-treating raw materials to prevent hard lumps and hard grains in the raw materials from depositing in foam slurry; (2) weighing each component according to a proportion; (3) preparing and adding foaming solution; (4) loading and stirring, namely, adding water into a stirrer, starting the stirrer, and adding cement, coal ash, perlite, waterproof agent, anti-freezing agent, water reducing agent and fiber into the stirrer in turn; (5) foaming, namely, foaming at the same time of stirring the slurry, sealing a valve firstly and then pressurizing the valve by an air compressor; (6) adding foam, namely, after the gelling slurry is well prepared, adding the foam into the gelling slurry under the state of stirring without stopping the stirrer; and (7) casting and molding, namely, when the slurry surface has no floating foam, finishing the preparation of the foam slurry. The foam concrete has the functions of light weight, water proofing, fire resistance, heat insulation, freezing resistance, cracking resistance, shock resistance and the like, and is particularly suitable for engineering insulating layers in cold areas and water-blocking and shock-resistant layers of underground engineering.

A terminal for connecting a superconducting multiphase cable, a superconducting three-phase cable for example, to a room temperature electrical equipment is described. The terminal includes a casing with cooling fluid, inside which the three cable superconductors are each connected with a resistive conductor the end of which is connected to the room temperature equipment phases at the outside of the casing. The terminal includes superconducting connectors between the three neutral superconductors and a single resistive conductor the end of which is externally associated with the room temperature equipment. The neutral superconducting connectors and the junction area of the connector of the single conductor are disposed inside the cold area of the casing.

An improved dry heat method and apparatus for thawing frozen biological fluids utilizing electrically heated plates and oscillatory motion to enhance heat transfer by mixing as the fluid thaws. Bags of frozen fluid to be thawed are lightly squeezed between two heating plates, one of which is gently oscillated to facilitate mixing of the thawing fluid, increasing heat transfer and reducing time required for thawing. Direct contact of the heating plates against the bag surfaces increases heat transfer by eliminating insulative effects of another bag wall and a water boundary layer, compared to water bath units. Flat (or curved to conform to bag) heat pipes are preferred as heating plates compared to plain aluminum sheet. Flat heat pipes have the property of an isothermal heating surface, thus maximizing heat transfer to the coldest areas, preventing hot spots, and simplifying heating plate temperature control.

A Peltier effect cooling device is formed in combination with an electronic device to form a unique thermal and electrical relationship. An electronic device to be cooled is placed in a serial electrical relationship between at least two thermoelectric couples while simultaneously being in thermal contact with a cold side of the cooler arrangement. The same current which produces the thermoelectric effect in the Peltier thermocouples also drives the electronic device. A balanced effect results as a higher driving current through the electronic device causes greater heating, it is offset by the added cooling due to a greater current in the thermocouples. In addition, a unique spatial arrangement provides improved heat distribution and transfer to a heat sink. Due to the unique shapes of Peltier elements, heat is pulled radially from a heat generating source and distributed at a peripheral region. Shaped Peltier elements are tapered from a small cold area to a large hot area to further magnify the transfer of heat.

The invention provides a concrete construction method for high-cold areas in low temperature seasons. In the construction method, a whole set of construction standards and specifications for the selection of raw materials, the mixture ratio design of concrete, concrete position, heat preservation during transportation, concrete mixture and pouring, temperature monitoring, concrete maintenance after pouring and other aspects is formulated, so the method solves problems caused by the conventional concrete construction of hydropower projects in high-cold areas and low temperature seasons.

The invention discloses a household air source heat pump heating system in cold area and a device thereof, and relates to a heat pump system which uses the air source for running steadily under the low-temperature environment and supplying the interior with the needed heat and healthy hot water and a device thereof. The device comprises parts such as a low pressure frequency compressor, a high pressure compressor, an outdoor heat exchanger, a flash evaporator, a reservoir, a defrosting coil, a flash gas overheating coil, a compressor heat radiating recovery coil, a low pressure air supply pressurization line, a sub-thermal converter, a multi-head efficient spiral heat exchanger, a thermal expansion valve, and the like, which are connected by a pipeline. The invention is characterized in that the system comprises a flash evaporator component, a flash gas overheating coil, a compressor heat radiating recovery coil, and a low pressure air supply pressurization line. When in heat operation under low-temperature working condition, based on the two-stage compression cycle which is incompletely cooled between two stages of throttles, the invention uses the flash gas overheating coil, the compressor heat radiating recovery coil, and the low pressure air supply pressurization line for recovering the heat radiating capacity of a compressor, realizes the overheating of the flash gaseous working substance, enhances the gas transmission capacity of the compressor, and further improves the heat and the energy efficiency ratio of a heat pump system. Meanwhile, the defrosting coil is added to the bottom part of the heat exchanger device, so the frosting problem of the outdoor heat exchanger of the heat pump is solved. The invention can realize the mutual switch among a single heating operating mode in winter, a heating and healthy hot water united operating mode in winter, and a healthy hot water single operating mode during a non-heating period.

A multiphase polymeric material comprises a first rigid continuous phase and a second elastic phase dispersed in the first phase. The multiphase polymeric material may be formed into polymeric strips and used to make a cellular confinement system which is suitable for use in cold areas.

The invention relates to a quick regenerating method for vegetation of returning farmland to grassland zone in extremely cold areas, which comprises the following steps of: (1) mixing and seeding annual pasture oat and perennial pasture on the farmland returning to grassland zone, and building an artificial pasture integrating mowing and grass seed harvesting functions; (2) ploughing and raking the artificial pasture; (3) sowing the seeds and applying base fertilizer; and (4) mowing the oat forage grass in the first year and harvesting the grass seeds and mowing the perennial pasture in the second year or later after covering and compacting the grass seeds in the step (3). The method utilizes the annual oat and perennial pasture to form different biotypes of pasture mixing and seeding community, so that the weed spreading can be obviously suppressed, the soil humidity and air humidity are obviously improved, the evaporation capacity and water loss and soil erosion intensity are reduced, therefore, the soil exposure time is short after regeneration of the grassland zone, the vegetation covering is quick, the water retention and preservation of soil moisture effect is obvious, and the ecological and economic benefits are remarkable.

The invention discloses fast rush-repair mortar for a ballastless track filling layer and a preparation method and an application thereof. The fast rush-repair mortar comprises the following components in parts by mass: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion admixture, 0.001-0.0025 part of fiber, 0.35-1.4 parts of macromolecular emulsion, 1.5-2 parts of sand, 0.001-0.005 part of thickening time control agent, 0.0004-0.01 part of antifoaming agent, 0.0001-0.003 part of gas forming agent, 0-0.01 part of air entraining agent, 0-0.02 part of water reducing agent, 0-0.001 part of rheology modifier and 0-0.3 part of water, wherein the cement and the cement expansion admixture account for 1 part in total. The rush-repair mortar disclosed by the invention has the advantages of fast setting and early strength and excellent thermal adaptability and application property, and guarantees recovery of railway operation in a skylight period of 4 hours in a severe cold area.

The invention relates to a novel architecture for a nuclear reactor of the integrated type.The invention comprises:realising the hot area and cold area separation device for the primary sodium flow in the form of two walls with cuts,providing two pumping groups hydraulically in series, one for the flow of sodium from the hot area to the cold area through the intermediate exchangers and the other in the cold area;providing outlet windows of the intermediate exchangers below the lower wall;providing outlet windows of the removal exchangers of the decay heat above the cold area, wherein all of clearances between the walls with cuts and the heat removal exchangers and the height between the two walls with cuts are previously determined so as to, during normal operation, take up differential movements between the walls, exchangers and vessel and to make it possible to establish during normal operation a thermal stratification of the primary sodium in the space defined between the horizontal portions of the two walls and so as to reduce, in case of an unexpected stop of a single pumping group, the mechanical stress applied to the walls and due to the portion of the primary sodium flow passing between said clearances.

The invention discloses a straw light-weight energy-saving insulated building block and a method for producing the same. The method comprises the following steps: using broken straw segments processed by a surface modifier, high strength low-alkali cement, fly ash, superfine active mixed materials and the like as main raw materials; adding various additives such as a waterproof impermeable agent, a preservative, a high-efficiency water reducing agent, an excitant and the like and modified materials to the main raw materials, mixing all the materials evenly, and adding water to the mixture and blending the mixture evenly; molding, demolding and maintaining the mixture to mold the building block (a reinforcing rib of which the surface is provided with a plurality of transverse lug bosses), and coating cement waterproof fluid on the outside; and making protection layers on two sides of the building block with ordinary Portland cement, sand, slag, additives and water so as to obtain the straw light-weight energy-saving insulated building block. The straw light-weight energy-saving insulated building block has the characteristics of light weight, high strength, good thermal insulation property, low water absorption rate, high freeze-melt resistance, fire prevention, water prevention, seepage prevention, insect and mouse damage prevention and the like, and saves 50 percent of energy for a single wall body material in the northern cold areas. Besides, the straw light-weight energy-saving insulated building block can be widely popularized and applied to the field of construction, in particular to the village and small town dwelling constructions in the northern cold areas.

The invention relates to the field of metallurgical technologies, and specifically relates to a method for reducing transverse cracks at a corner of a continuous casting billet of a boron-steel-containing wide-thick plate. The flow velocities of water in a wide-area water channel and a restricted-area water channel of a crystallizer are respectively controlled at 6.6-7.0 m / s and 6.9-7.3 m / s, and the temperature of water at an inlet is controlled at 28-30 DEG C; the conical degree of the crystallizer needs to be set into 1.05-1.15%; the melting point of casting powder of the crystallizer is less than or equal to 1150 DEG C, and the viscosity thereof is less than or equal to 0.145 (Pa.s1300 DEG C); the total water quantity of inner and outer arcs of two cold areas 1 is 95-110 l / m<2>; the total water quantity of left and right sides of a foot roll area is 35-45 l / m<2>; the specific water flow of two cold steel is controlled between 0.45 l / Kg and 0.65 l / Kg; and the water flow density at the corner of the casting billet and an area of 15 cm in the corner is less than or equal to 25 l / (m<2>.min). According to the invention, the defect rate of the corner of the boron-steel-containing wide-thick plate is reduced from 12.6% to a value less than 3.5%.

The invention relates to anti-freezing and anti-cracking concrete in the field of building materials. The anti-freezing and anti-cracking concrete comprises following components in percentage by weight, 10-20% of cement, 25-30% of sand, 30-45% of gravel, 10-15% of water, 2.0-5.0% of additives, 1.0-2.0% of water-proof agent and 0.0-1.4% of anti-freezing agent, and is produced by burdening and stirring. Compared with the prior art, the anti-freezing and anti-cracking concrete has the advantages of high strength, good toughness, cracking resistance, leakage resistance, high stability and the like, is capable of effectively solving the problems of cracking, brittleness and water seepage caused by the fact that the concrete is subjected to repeated freezing and thawing due to change of temperature difference, and increasing the indexes such as strength, toughness and stability, and is especially suitable for high and cold areas in north.

In order to provide a thermo-siphon chiller refrigerator for use in cold districts which performs natural refrigerant-circulation refrigerating cycle and also can perform a forced refrigerant-circulation refrigerating cycle when outside air temperature is high by using an indoor heat exchanger, an outdoor heat exchanger, and a compressor, and combining them with refrigerant piping, the thermo-siphon chiller refrigerator for use in cold districts of the invention has a compressor (10) additionally installed to a natural refrigerant-circulation refrigerating system comprising an outdoor heat exchanger (12), an indoor heat exchanger (11) located at a position lower than that of the outer heat exchanger (12), and an expansion valve (18). When the refrigerating capacity of the natural refrigerant circulation refrigerating system is not sufficient, the additional compressor (10) is operated to perform a forced refrigerant-circulation cycle i.e. a vapor compression refrigerating cycle.

The invention relates to a method and system for the automatical antifreezing and thermal insulating of a tunnel lining in high and cold areas. The method comprises the following steps that (1) a tunnel is provided with a surrounding rock, a primary lining, a waterproof plate, a secondary lining and a thermal preservation and thermal insulation layer sequentially from the outside to the inside; (2) a plurality of heating tubes are arranged, and refrigerant is sealed in the heating tubes; (3) the heating tubes are arranged between the secondary lining and the thermal preservation and thermal insulation layer along the length direction of the tunnel, the lower parts of the two ends of the heating tubes are buried in the surrounding rock below a tunnel pavement, so that the refrigerant is uniformly distributed on the lower parts of the two ends of the heating tubes; and the refrigerant continuously transfers heat from the surrounding rock below the pavement to the surface of the secondary lining through the circulation of ascending in a spontaneous vaporized gaseous state and descending in a condensation liquid state, and furthermore, the tunnel lining can be automatically prevented from being frozen and thermally insulated. Compared with the existing antifreezing and thermal insulating technology, the method has the advantages that the operating process does not consume any energy, the spontaneous vaporizing and condensing circulation of the refrigerant is utilized only, so that the tunnel lining can be automatically prevented from being frozen and thermally insulated; and moreover, the method is flexible in design, is convenient to construct and is low in cost.

The invention relates to low-cost normalizing rolling hot rolling H type steel and a preparation method thereof and belongs to the technical field of metallurgy and rolling. The chemical components of the H type steel comprises, by weight in percentage, 0.04-0.15 of C, 0.15-0.50 of Si, 0.95-1.65 of Mn,, not larger than 0.020 of P, not large than 0.015 of S, 0.02-0.050 of Al, not larger than 0.55 of Cu,, not larger than 0.30 of Cr, not larger than 0.50 of Ni, not larger than 0.10 of Mo, not larger than 0.03 of B, 0.02-0.060 of V, not larger than 0.04 of the sum of As, Sn, P and S and the balanced Fe and inevitable impurities. The production technology process of the steel comprises the steps of pretreatment of molten iron, converter steelmaking, LF refining, rectangular billet caster, heating, high pressure water descaling, rolling and cooling, straightening, sizing saw cutting and collecting and stacking. The low-cost normalizing rolling hot rolling H type steel has the beneficial effects of being low in production cost, high in strength, good in low-temperature toughness, excellent in welding use performance and the like. The low-cost normalizing rolling hot rolling H type steel meets the application requirement of the hot rolling H type steel material for extremely-cold areas, the LNG project and the offshore oil platform project at present.

The invention provides a wet copper extraction process used in high mud-content copper oxide ores of cold areas. The process comprises the following steps: crude ores are crushed and sieved, coarse fraction ores are sent to a storage yard for piling, fine fraction ores are sent to an ore washing system for washing and grading; placer ores are sent to the storage yard for the piling after washing the ores, and mud ores are sent to an agitation tank for agitation leaching; leaching solution which is obtained from heap leaching and agitation leaching processes is sent for extraction and stripping; stripping concentration solution is sent to an electrodeposition process, and a qualified cathode copper product is obtained; leached slag from the agitation leaching is neutralized and sent to a tailings reservoir for piling. The process has good permeability, fast copper leaching rate, and greatly improved copper leaching rate and leached copper yield per day by the grading and the heap leaching of the coarse fraction ores; and the copper leaching rate is improved and the ore utilization rate is greatly improved by the agitation leaching of minus 0.074mm size fraction ores. The method is applicable to the development and the application in the wet copper extraction process used in the high mud-content copper oxide ores of the cold areas, solves the difficult technical problems of poor bing permeability and slow copper leaching rate, widens the use range of copper ore resources and improves the comprehensive utilization rate of the copper.

The invention relates to an axle material. The influence of different proportions for which elements such as carbon, silicon, manganese, phosphorus, sulphur, chromium, molybdenum, nickel, copper and wolfram account, on material performances is studied, an alloy steel axle material which has good obdurability matching and a good fatigue property is obtained, preferably, the material is applied to production of railway carriage axles, particularly to the production of axles of railway carriages with a speed of more than 200km per hour, and the material also can be applied in high and cold areas.

The invention relates to a biology processing apparatus capable of processing sewage at low-temperature with low carbon-nitrogen-ratio in a cold region and a method for processing sewage at low-temperature with low carbon-nitrogen-ratio in the cold region, which relates to the biology processing apparatus for processing sewage and the method for processing sewage. According to the invention, problems that the ratio of carbon source and nitrogen source of sewage in winner at the cold region is low, the synchronization nitrogen and phosphorus removal efficiency in the current sewage processing technology is low, the index of nitrogen and phosphor in a processed effluent can not reach the standard can be solved. The apparatus comprises a water storage tank, a pre-conditioning hypoxia pool, an anaerobic pond, an anoxic pool, an aerobic tank, a sedimentation basin, an aeration head, a filling material, a stirrer, a water inlet pump, a reflux pump, a valve, an outlet pipe, a sludge discharge pipe and a residual sludge discharge pipe; The method comprises the following steps: 1)culturing microbe on a filling material; 2)adjusting operation parameter; 3)adjusting reflux ratio parameter; 4)passing the sewage through the pre-conditioning hypoxia pool, the anaerobic pond, the anoxic pool, the aerobic tank and the sedimentation basin for processing to obtain the processed water. The apparatus and the method can be used for construction and reconstruction of the sewage processing technology at low-temperature with low carbon-nitrogen-ratio in a north region.

The invention discloses an efficient planting method of morchella in a high-cold and high-altitude area. The method comprises steps as follows: 1, separate cloning of morchella fruiting bodies; 2, preparation of a cultivation strain; 3, preparation of a foreign nutrition bag. The method is not limited by natural conditions in areas with harsh natural conditions, such as high-cold areas, high-altitude areas and the like, morchella can be planted on a scale in a standardized manner annularly, sources of used materials are wide and convenient, waste can be turned into valuable, and life and production waste such as waste paper, waste cartons, plant ash, crop straw, fallen leaves, composted poultry, livestock manure and the like are recycled. By means of the technology, the fruiting repeatability is high, the yield is high and stable, and the technology is an economical and environment-friendly technology for out-of-season planting of morchella in a solar greenhouse.

The invention provides a battery pack temperature control system and a control method thereof. The battery pack temperature control system is simple in structure, low in cost and convenient to control. The battery pack temperature control system provided by the invention comprises a battery pack shell, a battery management unit and a control unit, wherein the battery pack shell is provided with an air flue, an air outlet of the air flue faces towards a battery inside the battery pack shell, a PTC (Positive Temperature Coefficient) assembly and a fan are arranged at an air inlet of the air flue, the PTC assembly and the fan are supplied with power by using a charger or a storage battery of an automobile, and the battery management unit, the PTC assembly and a control switch of the fan are respectively connected with the control unit. By adopting the battery pack temperature control system provided by the invention, the battery pack can be rapidly heated or cooled, the problem that the heat of the battery pack in a heavy-current discharge process can not be immediately dissipated is solved, the problem of low charge and discharge efficiency of the battery at a low temperature is also solved, and the power performance and the environment adaptive capacity of the battery pack are improved so that an electric vehicle can be used in a severe cold area in winter, and a wide application prospect is obtained.

The invention relates to a load-bearing heat-insulating decorating integrated assembled wall and a manufacturing method, in particular to an assembled wall using an aerogel material as a heat-insulating layer and having load-bearing, heat-insulating and decorating functions. Load-bearing concrete and a decorating layer are arranged inside and outside of the heat-insulating layer respectively. The load-bearing heat-insulating decorating integrated assembled wall has the advantages of light weight, high strength, low-heat-conducting coefficient, attractiveness and practicability, the assembled wall can be quickly assembled on site after being prefabricated and formed in a factory, the assembled wall has remarkable practical significance in development of residential industrialization and green buildings of China, and high-efficiency energy-saving heat-insulating effect of severe cold areas can be improved remarkably.

The invention discloses a severe cold area office building external window geometric parameter optimization method based on heating energy consumption consideration. The severe cold area office building external window geometric parameter optimization method comprises the following steps: 1) concluding a building external window geometric parameter which affects the heating energy consumption consideration, and investigating the parameter value domain of the building external window geometric parameter; 2) constructing a severe cold area office building form model; 3) constructing a building heating energy consumption calculation model; 4) constructing a genetic optimization search mechanism; and 5) optimizing the geometric dimensioning of an application model expansion external window. By aiming at severe cold area office building external window optimization requirements, a building external window form regulation process and an office building heating energy consumption simulation process are combined by applying a genetic algorithm, and the severe cold area office building external window optimization based on the heating energy consumption consideration is realized.

The invention relates to an area-separated and functionalized defrosting system of a heat pump type air cooled air conditioner. The defrosting system comprises an indoor heat exchanger (3), a compressor (7), an outdoor heat exchanger, an electronic expansion valve (9), a stop valve (10) and an outdoor draught fan (5). Area-separated and functionalized establishment is carried out on the outdoor heat exchanger, and the whole outdoor heat exchanger is formed by two or more than two functionalized heat exchangers. An outdoor auxiliary heat exchanger plays roles in anti-frost, periodical defrosting, auxiliary heating and evaporation and the like in winter in the heating process, and an outdoor main heat exchanger plays a role in absorbing heat on the outdoor air side to carry out indoor heating. The air conditioner can achieve indoor continuous heating during a defrosting period. The area-separated and functionalized defrosting system can ensure normal running of the heat pump type air cooled air conditioner through adoption of an outdoor exchanger area-separated and functionalized auxiliary heating and evaporation mode even if the air conditioner is in a severe cold area with microthermal climate and can meet heating requirements of the air conditioners in a cold area in winter. Compared with a traditional defrosting method, the area-separated and functionalized defrosting system has the advantages of being remarkable in energy conservation, universality and self-adaptability.

The invention discloses a cold-region used multi-connected heat pump system and a control method of the multi-connected heat pump system. The multi-connected heat pump system comprises a first refrigerant branch and a second refrigerant branch. The first refrigerant branch is connected between a first heat exchanger and a compressor of a main refrigerant loop in a crossed mode. A control unit controls the main refrigerant loop and when the main refrigerant loop is in refrigeration working condition, and the first refrigerant branch splits refrigerant flowing out the first heat exchanger; split refrigerant exchanges heat with the refrigerant flowed into a second heat exchanger after the split refrigerant is throttled and depressurized in the first refrigerant branch, the temperature of the refrigerant flowed into a second heat exchanger is decreased, and then the split refrigerant flows back to the main refrigerant loop to enter the compressor. The second refrigerant branch is connected between the second heat exchanger and a compressor of a main refrigerant loop in a crossed mode. The second refrigerant branch splits refrigerant flowing out the second heat exchanger. Split refrigerant exchanges heat with the refrigerant flowed into the main refrigerant loop after the split refrigerant is throttled and depressurized in the second refrigerant branch, and then the split refrigerant turns into gaseous refrigerant and is injected into the compressor to decrease the temperature of refrigerant vapor in the compressor.

The invention discloses an energy-saving-oriented Hadoop distributed file system storage policy in cloud computing. The energy-saving-oriented Hadoop distributed file system storage policy comprises the following steps: 1, performing regional division on a data node, dividing active-state data nodes in a hot area and standby-state data nodes in a cold area, and storing a created file in the hot area; 2, storing a data file, which is stored in the hot area, in the maximum data node of the preferably matched hot area according to a preferably matching policy; 3, judging the active degree of the data file, and transferring a data file in the cold area after the active degree reaches a threshold range; and 4, performing active degree judgment on the data file transferred in the cold area, and setting a node to be in a standby state if the difference between the existing time and the last access time of the data node of the cold area storing the data file is larger than a standby time threshold of the node. According to the energy-saving-oriented Hadoop distributed file system storage policy in the cloud computing, the hot nodes and the cold nodes can be effectively utilized, and the energy consumption is relatively greatly reduced.