74 results about "Global-warming potential" patented technology

An air conditioning apparatus includes an outdoor unit, indoor units, a branch unit, and a heat medium circuit through which a heat medium having a global warming potential (GWP) lower than that of the refrigerant circulates. The heat medium circuit has a first pump, a second pump, a first heat exchanger, a second heat exchanger, a first branch header, a second branch header, a first merge header, a second merge header, first on-off valves, second on-off valves, third on-off valves, fourth on-off valves, a fifth on-off valve, a sixth on-off valve, a seventh on-off valve, an eighth on-off valve, a ninth on-off valve, and a tenth on-off valve disposed in the branch unit, a supply main pipe and a return main pipe connecting the branch unit to the outdoor unit, and supply branch pipes and return branch pipes connecting the branch unit to the respective indoor units.

A refrigeration system is disclosed. The system includes a compressor, a condenser, an expansion device, and an evaporator, fluidically connected to form a refrigeration circuit. The system includes a refrigerant composition comprising an environmentally suitable chiller refrigerant having a 100-year direct global warming potential (GWP) of less than 150. The refrigerant composition includes a mixture comprising R-1336mzz-(Z) and R-1130-(E), wherein the amount of R-1336mzz-(Z) in the mixture is in a range of from or about 69% by weight to or about 81% by weight, and the amount of R-1130-(E) in the mixture is in a range of from or about 31% by weight to or about 19% by weight.

The invention discloses a halogenated hydrocarbon and heavy metal combined pollution natural attenuation life cycle benefit evaluation method, and belongs to the technical field of environmental science and engineering. The method comprises the following steps: constructing an MNA full-life-cycle system boundary, and establishing a list database including monitoring well network full-life-cycle operation and maintenance, long-term sampling analysis and natural attenuation asset accounting; establishing a biogeochemical coupling evaluation model, and introducing a coupling factor to quantify the synergistic environmental benefit of halogenated hydrocarbon anaerobic degradation and heavy metal reduction fixation; selecting global warming potential, primary energy consumption and secondary environment risk indexes to carry out characterization evaluation; a net environmental benefit (NEB) is calculated based on a time discount principle. According to the method, the ecological and economic comprehensive advantages of the MNA technology in the specific combined pollution area can be scientifically and quantitatively revealed, and a decision basis is provided for green restoration technology screening and long-term monitoring scheme optimization.

The invention provides a CNG filling station greenhouse gas leakage carbon emission accounting method, and belongs to the technical field of carbon emission accounting. Aiming at the characteristics that carbon emission sources of the CNG gas station are scattered and low in intensity, a carbon emission surface source diffusion model suitable for scattered point sources is created based on a gas diffusion model, and meanwhile, aiming at the characteristic that meteorological conditions of the gas station under actual working conditions are complex, the actual measurement data, model parameters and correction position information in different monitoring time periods are combined, so that the carbon emission surface source diffusion model is established. A time weighting method is adopted to carry out unit source intensity accounting on a surface source unit, the carbon emission intensity is determined based on the global warming potential, and finally, the carbon emission is accounting in combination with a carbon emission time period. The method not only can cope with sporadic carbon emission sources, but also can improve the accuracy of the accounting result under the condition of wind direction change, overcomes the limitation of the existing method under complex meteorological conditions, and provides data support and decision basis for the subsequent formulation of carbon emission reduction measures.

The invention discloses an environment-friendly compound gas extinguishing agent, and belongs to the technical field of extinguishing agents. Comprising a main fire extinguishing agent and an auxiliary agent which are uniformly mixed, wherein the main fire extinguishing agent is perfluoropentanone, and the auxiliary agent is selected from halogen olefin with the carbon atom number of 2-6. The compound gas fire extinguishing agent has efficient fire extinguishing performance and excellent environment-friendly performance, the ozone consumption potential (ODP) value is 0, and the global warming potential (GWP) value is smaller than 5. The boiling point of the compound gas fire extinguishing agent is obviously reduced compared with the boiling point of perfluorohexanone as an existing fire extinguishing agent, and the boiling point is reduced by about 20 DEG C at most, so that the compound fire extinguishing agent can be efficiently used in a low-temperature environment.

This invention discloses a method and system for quantitatively assessing carbon emissions during transformer operation, belonging to the technical field of equipment carbon emission assessment. The method includes: determining the sources of carbon emissions from the transformer, including direct and indirect carbon emissions; for indirect carbon emissions, determining the transformer's power loss value within a specified time period, and determining the carbon dioxide equivalent of the power loss based on the power carbon dioxide emission factor; for direct carbon emissions, determining the transformer's fault gas generation within the specified time period, and determining the carbon dioxide equivalent of the fault gas generation based on the global warming potential; and quantifying the carbon emissions during the transformer operation phase within the specified time period based on the power loss and the carbon dioxide equivalent of the fault gas generation. This invention can accurately quantify the direct and indirect carbon emissions of transformers during operation, and can promote the low-carbon transformation and green development of the power industry.

The invention discloses a method for examining greenhouse gases, and particularly relates to the technical field of greenhouse gases. The greenhouse gas interrogation method comprises the following steps: S1, setting a boundary range: setting a time boundary; organizing a boundary; reporting a boundary; s2, quantitative calculation of emission sources: calculating the greenhouse gas amount of each emission source by adopting an emission factor method, wherein the fixed / mobile combustion source / purchased power emission amount is equal to activity data * fuel emission factors; the domestic sewage CH4 discharge amount = annual BOD total amount * methane production factor; in the breeding process, the CH4 / N2O discharge amount of excrement is equal to the number of livestock and poultry * excrement management discharge factors; performing equivalent conversion by using a global warming potential (GWP) of a sixth evaluation report of the IPCC; s3, data quality management: establishing a 6-level quality scoring system of activity data and emission factors; calculating a data quality total score through a formula; and S4, management in the reference year. According to the greenhouse gas checking method provided by the invention, the calculation error of the discharge amount in the breeding process can be reduced, and the checking precision is improved.

The invention relates to the technical field of refrigerants, and particularly provides an environment-friendly refrigerant and a preparation method and a recovery system thereof. In order to solve the problems that a traditional refrigerant is high in global warming potential (GWP), large in degradation energy consumption and not matched with a novel catalyst, the refrigerant is hydrofluoroolefin containing beta-position C = C double bonds, the molecular general formula is CF3CF = CHR (R is H or F), the molecular size is smaller than or equal to 0.8 nm, and the refrigerant is specially designed for being matched with a mesoporous structure of a TNT-120 titanium dioxide nanotube, and adsorption-mass transfer optimization and photo-thermal synergistic degradation synergism are achieved. And a closed-loop solution from production to scrapping is provided for the novel refrigerant. The recycling system adopts a catalytic reactor of which the inner wall is loaded with a titanium dioxide nano coating, and the refrigerant is efficiently degraded under the conditions of low temperature (25-240 DEG C) and low light intensity (0.5-3W / cm < 2 >). The refrigerant has a GWPlt (GWPlt); the refrigerant has the advantages of being good in heat stability, low in degradation energy consumption, environmentally friendly in the whole life cycle and the like, is suitable for replacing a high-GWP refrigerant and meets the requirement for green refrigeration.

The invention belongs to the technical field of life cycle evaluation methods, relates to a method for quantifying full life cycle environmental influence of a plug-in hybrid electric vehicle, and is particularly suitable for accurately evaluating environmental benefits in a province popularization scene. According to the method, firstly, a target and a range are determined, wherein a function unit is set to enable the PHEV to run on a road under a comprehensive working condition for 150 thousand kilometers, and a research range covers a whole life cycle process; then collecting a material list and material energy input data of each component of the PHEV, carrying out list analysis, and constructing a full-life-cycle model; after classification, characterization and normalization processing, 11 kinds of midpoint environmental influence indexes are adopted for influence analysis, and meanwhile, probabilistic evaluation of key indexes (such as global warming potential (GWP)) is achieved through coupling of electric power structure clustering and Monte Carlo simulation; and finally, through result explanation, an accurate reference basis is provided for optimizing a PHEV manufacturing process, promoting technical innovation and reducing full-life-cycle environmental influence.

In some embodiments, a thermal management fluid conversion composition includes an additive. The additive is selected to miscibilize a first lubricant for a high global warming potential (GWP) refrigerant with a low GWP refrigerant. In some embodiments, a thermal management fluid conversion composition includes an additive and a first refrigerant. The thermal management fluid conversion composition is selected to miscibilize a second lubricant for a high global warming potential (GWP) refrigerant with a low GWP refrigerant.

A foamable polymeric mixture is provided that includes a polymer composition and at least one blowing agent. The blowing agent may comprise any blowing agents known not to deplete the ozone or increase the prevalence of global warming, such as CO2, HFO, HFC and mixtures thereof. The foamable polymeric mixture may further includes at least one processing aid comprising an organic phase changing material. The inventive foamable mixture is capable of processing at a pressure range of 800 to 1200 psi (5.5 to 8.3 MPa).

Cleaning solvent blends comprising an HCFO such as l-chloro-2,3,3,- trifluoropropene; trans-dichloroethylene; and a high boiling HEE such as HFE-7300; have utility as a non-flammable, low-global warming potential, azeotrope-like cleaning solvent compositions. Additional solvent ingredients may include surfactants and co-solvents. A method for cleaning articles of soiling substances comprises contacting the articles with the solvent composition by any suitable means such as a spray delivered by a propellant gas, or by contact with liquid and / or vapor solvent compositions, as in a conventional vapor degreaser apparatus, and removing the composition from the articles.

Provided is a composition for a refrigerator, which is a mixture of a mixed refrigerant that has a low global warming potential and contains carbon dioxide, and a refrigerator oil that has excellent compatibility with the mixed refrigerant and that has excellent thermal stability with respect to the mixed refrigerant. The composition for a refrigerator contains a refrigerant mixture and a refrigerator oil containing a base oil, the refrigerant mixture containing a fluorinated hydrocarbon compound and carbon dioxide, and the base oil containing at least one selected from the group consisting of polyvinyl ethers and polyol esters.

The present invention relates to a process for preparing a refrigerant blend containing one or more purified hydrofluorocarbon compounds. [Solution] One or more hydrofluorocarbon compounds are recovered and purified from one or more refrigeration, air conditioning, or heat pump systems.

Methods are directed to on-site recovery and repurposing of refrigerant. The on-site recovery and / or repurposing recovers an original refrigerant and converts, in-situ, the original refrigerant into a converted refrigerant different from the original refrigerant. The converted refrigerant has a relatively lower global warming potential than the original refrigerant.

The present invention relates to an insulating gas used for electrical insulation or arc extinguishing of an electrical device, and an electrical device for insulating electricity using the same. The insulating gas of the present invention, which may replace SF6 gas, consists of a mixed gas of trifluoromethyl trifluorovinyl ether (CF3OCFCF2) and a carrier gas. The insulating gas of the present invention has the characteristics of a low boiling point, high dielectric strength, low toxicity, and a low global warming potential (GWP=1 or less), and thus may replace SF6, and the low global warming potential with no loss of high insulating capacity and arc extinguishing capability may reduce greenhouse gases.

To provide a separation membrane, a separation membrane module, a separation device, and a gas separation method which are excellent in productivity and workability, and can effectively separate gas having a high warming coefficient.SOLUTION: A separation membrane contains a thermoplastic resin as a main component, wherein in measurement of dynamic viscoelasticity, when the separation membrane is measured while changing the frequency to 1 to 100 Hz, an inclination A of a logarithmic approximate expression obtained from a frequency F and a tanδ peak temperature T plot is 1.4 or more.SELECTED DRAWING: None

Provided is a cleaning solution having a low global warming potential value and having particle removal properties equal to or higher than those of conventional hydrofluoroethers. The present invention relates to a cleaning solution for removing particles, the cleaning solution containing a hydrofluoroether, the hydrofluoroether being a compound represented by general formula (1).

Provided is a plasma processing device with which the operating cost of abatement equipment is minimized. This plasma processing device comprises: a processing chamber in which a sample is subjected to plasma processing; a high-frequency power supply which supplies high-frequency power for generating plasma; a sample mount on which the sample is placed; abatement equipment which decomposes waste gas from the processing chamber; and a control device which controls the abatement equipment. The control device controls the abatement equipment according to an abatement equipment operation condition defined on the basis of the global warming potential per unit of time calculated using an etching condition.

Provided is a heat transfer fluid which exhibits thermal stability in a wide temperature range, is suitable for use, and has a short atmospheric life at a level that lowers the global warming potential. A heat transfer fluid according to the present disclosure contains a compound which is represented by formula (A), and in which the number of Si atoms in formula (A) is one, and the total mass of the compound represented by formula (A) in the heat transfer fluid is 5 mass% or more. (In formula (A), Y5, Y6, Y7, and Y8 each independently represent a substituent group having 1-20 carbon atoms.)

The invention discloses a slow-mixing fertilizer suitable for increasing yield and reducing emission of machine-transplanted early rice in a low-latitude region. The slow-mixing fertilizer is prepared from the following components in parts by mass: 4-6 parts of sulfur-coated urea and 4-6 parts of 2-month resin-coated urea. The invention further discloses application of the slow-mixing fertilizer in early rice production, fertilization and rice transplanting are synchronously carried out, and the slow-mixing fertilizer is directly applied to the position 5 cm away from the rhizosphere side of seedlings and the position 3-5 cm deep in soil. The slow-mixing fertilizer provided by the invention can improve yield and nitrogen fertilizer utilization efficiency and reduce greenhouse gas emission. Compared with the conventional high-yield fractional fertilization, the slow-mixing fertilizer disclosed by the invention has the advantages that by applying the slow-mixing fertilizer disclosed by the invention, the yield of rice is increased by 7.5%-7.8%, the nitrogen fertilizer utilization efficiency is increased by 30.5%-44.5%, meanwhile, the global temperature increasing potential is reduced by 12.8%-27.5%, and the greenhouse gas emission intensity is reduced by 19.3%-32.7%.

The invention discloses a method and a system for evaluating environmental protection performance of gas-insulated power transmission pipelines. The method comprises the following steps: acquiring the number and the size of the gas-insulated power transmission pipelines and the type of mixed insulating gas; calculating a global warming potential value of the mixed insulating gas according to the type of the mixed insulating gas; according to the size of the gas insulation power transmission pipeline, the maximum volume of each gas insulation power transmission pipeline is calculated, and the maximum mass of the mixed insulation gas needed by each gas insulation power transmission pipeline is obtained; and on the basis of the maximum mass and global warming potential value of the mixed insulating gas, calculating the equivalent discharge amount of CO2 gas generated by the mixed insulating gas and annual leakage mixed insulating gas of all gas insulated power transmission pipelines, and taking the equivalent discharge amount as a quantitative index for environmental protection performance evaluation. The invention relates to the technical field of electrical equipment, quantitatively calculates the environmental protection performance of the gas insulated power transmission pipeline, and provides a key reference basis for selection of an insulating medium when the environmental protection performance is considered in practical engineering.

The application discloses a kind of biochar assisted high-temperature pretreatment of agricultural and forestry waste aerobic composting method.The application uses biochar assisted high-temperature heating to compost pretreatment of agricultural and forestry waste, can realize the strengthening degradation of raw material lignin and improve composting efficiency.The pretreatment method can significantly improve the degree of degradation of rosemary branch lignin, prolong the high-temperature period of composting and speed up the composting process, so that the degradation of organic matter is more sufficient, and the quality indicators such as the nutrient level and germination index of the compost product are improved;And can effectively reduce the emission of greenhouse gases such as methane and nitrous oxide during composting, reduce the global warming potential of the composting process, so as to overcome the problems of slow degradation, long composting period, unstable product quality and high greenhouse gas emission in traditional lignin-rich material composting.The application provides a popular technical path for efficient and low-carbon resource utilization of lignin-rich agricultural and forestry waste, and has significant ecological and application value.

Disclosed is an ion conductive electrolyte comprising a liquefied gas solvent that exhibits a low global warming potential (GWP) and low flammability while also creating a good solid electrolyte interface in an electrochemical device to maintain high performance and cycle life. The ion conductive electrolyte includes a multi-component solvent mixture having a low GWP solvent and a non-low GWP solvent. The total GWP of the multi-component solvent mixture is at least 50% lower than the GWP of the non-low GWP solvent alone.

A composition comprising 1,1-difluoroethane, propane, and at least one substance selected from the group consisting of trifluoroethylene and trans-1,2-difluoroethylene, wherein the total content of 1,1-difluoroethane, propane, and trifluoroethylene or trans-1,2-difluoroethylene is 90.0 mass % or more with respect to the total amount of the composition, the global warming potential is at most 65, and the heat of combustion is at most 28.000 MJ / kg.

The present invention discloses a heat transfer composition for replacing R123. The heat transfer composition comprises: 1% to 98% by weight of Z-1-chloro-2,3,3,3-tetrafluoropropene, 1% to 98% by weight of Z-1-chloro-2,3,3-trifluoropropene, and 1% to 30% by weight of 1,1,2,2,3-pentafluoropropane. The heat transfer composition is non-flammable, has a global warming potential (GWP) of less than 150, and an organic thermal conductivity (ODP) of approximately 0. The heat transfer composition of the present invention offers advantages such as environmental friendliness, excellent safety performance, and a high heating capacity per unit volume. It can be used as a heat transfer fluid in systems such as medium- and high-temperature heat pumps, chillers, heat pipes, and organic Rankine cycles.

The present invention belongs to the field of refrigerant technology, applies trifluoroacetyl fluoride to the field of refrigerants for the first time, and provides a low GWP value composition containing trifluoroacetyl fluoride and a refrigerant containing the composition, wherein the composition comprises trifluoroacetyl fluoride and component A, and component A is selected from the general formula C n F x H y At least one of the following: trifluoroacetyl fluoride content ≥ 50 wt%, wherein n = 1, 2, or 3, y ≥ 1, and x + y = 2n or 2n + 2. The refrigerant may also contain a functional additive to optimize refrigerant performance. The composition of the present invention has low toxicity, high thermal stability, and a global warming potential (GWP) of ≤ 150, meeting international environmental protection requirements. It can operate in a temperature range as low as -85°C. When used in the -40 to -83°C temperature range, the refrigeration system can still maintain positive pressure operation. It is expected to serve as a key component of a new generation of refrigerants to promote further development of the refrigeration industry.

The application provides a carbon dioxide liquefaction method, device and ship for a ship, the carbon dioxide liquefaction method for the ship comprising the following steps: compressing carbon dioxide gas to increase the pressure and temperature of the carbon dioxide gas; compressing and expanding air to obtain a heat exchange medium with a temperature lower than that of the carbon dioxide gas; and exchanging heat between the heat exchange medium and the carbon dioxide gas to obtain carbon dioxide liquid. The carbon dioxide liquefaction method for the ship solves the problem of high global warming potential and global warming potential of the commonly used low-temperature liquefied refrigerant of the carbon dioxide gas for the ship by using environmentally friendly air as a refrigerant. Meanwhile, the mechanical energy generated by the air expansion can be output to the first compressor in the process of air expansion, so that the system working efficiency is improved and the system energy consumption is reduced while refrigeration is achieved.

A system and method are provided for producing composite panels using hemp-based materials. The process includes combining hemp hurd, fiber, and dust with an adhesive to form a mixture having a controlled particle size distribution and moisture content. The mixture is subjected to compression at elevated temperature and pressure to form a solid panel with a target density ranging from 20-50 pounds per cubic foot. The process may include the use of additional plant-based materials, such as wheat bran or bagasse, in adjustable proportions. Resulting panels may contain 79% to 91% renewable content and are manufactured without formaldehyde-based binders. The panels are suitable for applications including siding, flooring, cabinetry, and wall systems, and demonstrate reduced environmental impact in terms of energy, water usage, and global warming potential compared to conventional wood-based products. The process allows optional fillers, binders, and reinforcements to customize the panels' properties.

The present invention provides a refrigeration cycle device that comprises a refrigeration circuit including a compressor, a condenser, an expansion mechanism, and an evaporator, wherein: a refrigerant is sealed in the refrigeration circuit; the refrigerant includes HFO1123 and at least one selected from the group consisting of R32, R1234yf, and R1234ze(E); in an XY coordinate plane in which the mass ratio of HFO1123 is defined as an X-axis and the global warming potential of the refrigerant is defined as a Y-axis, when coordinates (0, 675) are defined as a point A, coordinates (100, 1) are defined as a point B, coordinates (10, 300) are defined as a point C, coordinates (40, 150) are defined as a point D, and coordinates (65, 10) are defined as a point E, measurement coordinates (X, Y) of the refrigerant exist within a first range that is surrounded by a first straight line connecting the point A and the point B, a second straight line connecting the point A and the point C, a third straight line connecting the point C and the point D, a fourth straight line connecting the point D and the point E, and a fifth straight line connecting the point E and the point B.