62results about How to "Low GWP value" patented technology

An indirect type low-temperature heat pump system comprises an electric compressor, a high-pressure refrigerant cooling liquid heat exchanger, a dry liquid storage tank and a low-pressure refrigerantcooling liquid heat exchanger which are sequentially connected to form a refrigerant loop, the refrigerant loop and the cooling liquid loop are completely independent, the high-pressure refrigerant cooling liquid heat exchanger and the indoor heater form a high-temperature cooling liquid loop, and the low-pressure refrigerant cooling liquid heat exchanger, the first expansion kettle, the driving motor, the heat dissipation water tank and the heating water PTC used for increasing the temperature of the low-temperature heat source to form a low-temperature cooling liquid loop. According to the invention, the refrigerant loop design is simplified through compression, the refrigerant leakage risk is reduced, the refrigerant filling amount is reduced, and the safety of the R290 heat pump air conditioner is improved; the automobile air conditioner has the functions of refrigeration, heating, demisting and defrosting of a passenger compartment of a new energy automobile, and can still normally operate a heat pump for heating in a low-temperature environment through the air supplementing compressor and the heating water PTC.

The invention discloses a tetrafluoropropene composition with good lubricant compatibility and a preparation method thereof. The compositions comprises, in parts by weight, 0.4-15 parts of fluorine-modified Ni-containing hydrotalcite-like compound, 0.002-0.25 part of a silane coupling agent, 49.5-985 parts of a lubricant, 4000-90000 parts of 2,3,3,3-tetrafluoropropene, 0-60000 parts of fluoroethane, 0-15000 parts of 1,1-difluoroethane, 0-5000 parts of isobutane, and 0.8-1 part of N-propyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide. The invention also provided a preparation method of the tetrafluoropropene composition. The tetrafluoropropene composition has god lubricant compatibility and flame retardation performance.

This invention relates to oxahydrofluoroether compounds and a preparation method and application of the new oxahydrofluoroether compounds. The oxahydrofluoroether compounds are compounds represented by a general formula of CF3O(CF2O)mCF2CF2R, wherein R is OR1 or (OCF(CF3)CF2)nOR2 or OCF2CF2OR3, and R1, R2 and R3 are linear-chain or branched-chain C1-C3 alkyl groups. The designed new oxahydrofluoroether compounds have a structure with high content of the oxygen element, extremely low surface tension and stronger permeability than those of other hydrofluoroether solvents, and can be applied to cleaning agents so as to ensure thorough cleaning; meanwhile, due to high content of oxygen and a short atmospheric lifetime, the hydrofluoroether compounds can be easily degraded to CO2 and fluoride salts, and have a low GWP value which is the greenhouse effect potential value; the oxahydrofluoroether compounds have good application in anti-fingerprint liquid diluents, dilution of a fluorine-containing treating agent, removal of contaminants in equipment components, preparation of foamed plastics, welding in a vapor phase, transfer of heat, deposition of coatings on substrates and cutting or grinding aspects.

The invention discloses an alternative R-134A refrigerant for a vehicle and a preparation method of the refrigerant. The refrigerant is prepared by mixing the following raw materials in parts by weight: 29-62 parts of difluoromethane, 32-58 parts of propylene and 10-40 parts of trifluoroiodomethane. The preparation method comprises the following steps: S1, detecting the purity of each raw material; S2, cleaning a pressure vessel by using a cleaning reagent; S3, vacuumizing the pressure vessel; S4, adding the raw materials reaching the standard into the pressure vessel in parts by weight and mixing so as to obtain the mixed materials; and S5, sampling the mixed materials in S4, and detecting whether the components in the materials meet the corresponding weight ratio. According to the alternative R-134A refrigerant for the vehicle, provided by the invention, no original refrigeration plant needs to be replaced, the refrigerant can be used without adjustment, the transformation cost is greatly saved, the energy-saving effect is excellent, and the energy is saved by 8-12% compared with the original R-134A refrigerant.

The invention provides a refrigerant containing trifluoroiodomethane. The refrigerant comprises the following three components in percentage by mass: 36%-80% of a first component, 8%-60% of a second component and 4%-24% of a third component, wherein the mass ratio is based on the total mass of the refrigerant substance; the first component is trifluoroiodomethane (R13I1); the second component is amixture of any two components selected from trifluoromethyl methyl ether (RE143a), 1, 1-difluoroethane (R152a), trans-1, 3, 3-tetrafluoropropene (R1234ze (E)), 3, 3, 3-trifluoropropene (R1243zf), 2,3, 3, 3-tetrafluoropropene (R1234yf), isobutane (R600a), dimethyl ether (RE170) and fluoroethane (R161); the third component is one of dimethyl ether (RE170) and cyclopropane (RC270); and the GWP of the refrigerant is less than or equal to 150. According to the refrigerant, the problems that the refrigerant GWP replacing R134a in an existing automobile air conditioning system is high in GWP and low in the refrigerating capacity can be solved, and meanwhile the problem that the heat exchange efficiency is low due to large temperature slippage is solved.

The invention discloses a low-carbon environment-friendly foaming agent composition, which is prepared from the following raw materials in percentage by mass: 60-98.99% of 1-chloro-3,3,3-trifluoropropene, 1-39.9% of 1,1,1,2,3-perfluoropropane and 0.01-1% of 1,2,2,3-tetrafluoropropane. A GWP value of the low-carbon environment-friendly foaming agent composition GWP value is HFC-245fa of a single working medium, the low-carbon environment-friendly foaming agent composition has the characteristics of being environmentally friendly, excellent in foaming property and small in deforming equipment transformation, the heat conductivity coefficient and the energy consumption level of a whole machine can be reduced, so that the low-carbon environment-friendly foaming agent composition becomes an optimal choice of high-performance rigid thermal insulation foam, and is an ideal choice of a foaming agent in the future.

The invention provides an aerosol type precise instrument cleaning agent and a preparation method. The formula of the aerosol type precise instrument cleaning agent comprises the following componentsin parts by weight: 75.0-90.0 parts of an environment-friendly solvent, 0.01-1.0 part of a surfactant, 1.0-10.0 parts of a cosolvent and 5.0-10.0 parts of a propellant. According to the invention, thecleaning agent for the precise instrument has the following beneficial effects that 1, the cleaning agent is excellent in performance, safe and reliable, and can quickly remove dust, oil stains, moisture and the like of the precise instrument under the condition of no power failure; 2, the construction operation is flexible, simple and convenient, and the product safety is high; 3, the cleaning agent product is safe to use, free of flash point, non-combustible, zero in ODP and low in GWP value, and meets the environmental protection requirement; and 4, the volatilization speed is moderate, the ice crystal effect and the condensation phenomenon are avoided in the cleaning process, the surface insulation value of the equipment is not obviously reduced, and the equipment is not corroded anddamaged. The invention further discloses a preparation method of the precise instrument cleaning agent.

The invention relates to an azeotropic refrigerant, in particular to an azeotropic refrigerant capable of replacing R134a. The refrigerant can be applied to a single-stage or double-stage refrigerating / heating system, the azeotropic refrigerant consists of CO2 AND r170, when the mass ratio of CO2 is 78-80.6%, temperature glide is 0 DEG C, a temperature range corresponding to a bubble point temperature is [minus 6 DEG C-18 DEG C], the azeotropic refrigerant is used for replacing R134a, has low GWP value and low flammability, a temperature glide value is zero, a COPheat value is high, theoretical specific power is low, discharge temperature is low, compression ratio is low, similar heating ability is achieved, efficiency is high, and the zeotropic refrigerant capable of replacing R134a is suitable for being used in a relatively cold region.

The invention provides a mixed refrigerant suitable for the freezing zone at 90 to 100 below zero DEG C, which is made by mixing the ethane and the ethylene. The mol percentage is as follows: ethane 20 to 80 percent and ethylene 20 to 80 percent. The mixed refrigerant adopts the preparation that the two components are physically mixed according to a set matching at normal temperature and the corresponding mixed refrigerant can be obtained. The ODP is zero and the mineral lubricating oil of compressor can be well inter-dissolve with the mixed refrigerant . The mixed refrigerant is suitable for the low temperature grade of two-grade cascade refrigeration system and can form 90 to 100 DEG C below zero ultralow temperature.

The invention discloses an environment-friendly refrigerating composition with excellent refrigerating and heating performance. The environment-friendly refrigerating composition comprises the following components: (a) 1 to 30% of fluoroethane; (b) 1 to 60% of 1, 1, 2-trifluoroethylene; (c) 1 to 25%of a third component which is selected from 1, 1-difluoroethane and / or difluoromethane; and (d) 1 to 50% of a fourth componentwhich is selected from at least one of trifluoroiodomethane, fluoromethane or carbon dioxide. The ODP value of the environment-friendly refrigerating composition is 0, the GWP value is smaller than or equal to 200, and the environment-friendly refrigerating composition has excellent refrigerating and heating performance at the same time, can be used as a refrigerant for replacing R410A and is particularly suitable for being used as a heat transfer medium of a new energy automobile air conditioner.