53 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.

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 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.

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.

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.

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.

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.

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 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.

Provided is an insulating gas replacement method that can sufficiently achieve the effect of preventing global warming and that can efficiently execute replacement of insulating gas. This insulating gas replacement method comprises a recovery step (ST10), an encapsulation step (ST20), and an atmospheric pressure test step (ST30), and involves replacing a first insulating gas in a gas insulated switchgear (100) with a second insulating gas (20) having a global warming potential lower than that of the first insulating gas (10). In the recovery step, the first insulating gas is recovered from the interior space of a sealed tank (101). In the encapsulation step, the second insulating gas is introduced and encapsulated in the interior space of the sealed tank from which the first insulating gas has been recovered. In the atmospheric pressure test step, an atmospheric pressure test is executed on the gas insulated switchgear. The second insulating gas comprises at least one substance selected from oxygen, carbon dioxide, nitrogen, helium, neon, argon, xenon, and krypton. The recovery step, the encapsulation step, and the atmospheric pressure test step are each executed at a location where the gas insulated switchgear is installed.

The present invention provides a refrigerant composition comprising from about 50% to less than 65% by weight of HFO-1234ze(E), from 1% to less than 12.5% by weight of HFC-134a, and from 25% to about 42% of HFCO-1233zd(E). The present invention preferably provides a non-flammable, non-toxic refrigerant composition (i.e., Class A1) having global warming potentials (GWPs) of 150 or less and at the same time excellent heat transfer efficiency compared to previously used refrigerants R-134a and R404a in a wide variety of refrigeration applications, including in medium temperature refrigeration systems and methods, low temperature refrigeration systems and methods, cascade refrigeration systems and methods, vending machines, heat pump water heaters, mobile air conditioning systems and methods, stationary air conditioning systems and methods, transport refrigeration, heat pipe cooling, cold plate cooling, and high temperature heat pumps, and in methods for heating and / or cooling using a replacement refrigerant comprising a refrigerant of the present invention in an R-134a system and / or an R-404A system.

This composition contains: trifluoroethylene or trans-1,2-difluoroethylene; difluoromethane; propane; and 1,1-difluoroethane. The composition has a global warming potential of at most 150, and a heat of combustion of at most 28.000 MJ / kg.

A cleaning solvent mixture comprising an HCFO, for example, 1-chloro-2, 3, 3-trifluoropropene, and a solvent mixture comprising at least one of an organic solvent, an organic solvent, and an organic solvent, trans dichloroethylene; and a high boiling point HFE, such as HFE-7300; the cleaning solvent composition has the application as a non-flammable, low global warming potential, azeotrope-like cleaning solvent composition. The other solvent components may include a surfactant and a co-solvent. A method of removing soils from an article includes contacting the article with a solvent composition, or by contacting with a liquid and / or vapor solvent composition, such as in a conventional vapor degreaser device, in any suitable manner, such as a spray delivered by a propellant gas, and removing the composition from the article.

This invention discloses a method and system for determining design schemes for urban engineering projects. The method involves acquiring design information for each scheme and calculating its information density index; obtaining subjective evaluation indicators and objective performance indicators; determining subjective weights using fuzzy hierarchical analysis and extracting objective weights using CRITIC; and performing a game-theoretic equilibrium fusion of the subjective and objective weights to obtain a weight decision matrix for each design scheme. When the information density index is not less than a preset information density threshold, the method calculates annual photovoltaic capacity indicators and annual building global warming potential, updating the weight decision matrix. Based on the weight decision matrix, the TOPSIS method is used to rank the design schemes. Using this invention, adaptive adjustments to decisions can be achieved during the design phase evolution, enabling an automatic switch from a subjective-objective integrated decision structure to a life-cycle objective performance-driven decision structure.

An eco-friendly plasma cleaning system and method are disclosed. The plasma cleaning system comprises a remote plasma device. Here, a precursor having a global warming potential (GWP) of 10,000 or less and an oxygen-containing gas are introduced into the remote plasma device, plasma is generated using the precursor and the oxygen-containing gas in the remote plasma device, and the plasma or radicals corresponding thereto are supplied to a chamber connected to the remote plasma device, so as to clean the chamber.

The present invention relates to processes for preparing refrigerant blends comprising one or more purified hydrofluorocarbon compounds, wherein the one or more hydrofluorocarbon compounds have been recovered from one or more refrigeration, air conditioning or heat pump systems, and purified.

A Novel thermodynamic cycle known as the ‘Hybrid Power Cycle’ is proposed consisting of a power cycle and a refrigeration cycle in a partial form, using fixed amounts of the same working-fluid in closed cycles. The vapor in the partial refrigeration cycle undergoes a polytropic compression with the rejected heat removed by the compressed liquid in the partial power cycle before both are combined at same pressure prior to entering a heat exchanger to absorb ambient heat. When the temperature reaches the desired level, they undergo turbo-expansion yielding a minimum external achievable work of 60.63KJ / kg of liquid nitrogen (LN2). A novel binary-hybrid cycle was also invented to increase the external work-output to 77.79KJ / kg (LN2). This technology can be used to generate clean electrical and mechanical power including transportation without any fuel at a low cost, using only ambient heat with zero environmental pollution and zero global warming potential.

The invention discloses a real-time carbon emission monitoring method and device and a medium, and the method comprises the steps: extracting environment gas in a target environment through a gas component analyzer, and monitoring greenhouse gas components and greenhouse gas concentration in real time through a tunable semiconductor laser absorption spectrum technology; the greenhouse gas concentration is uploaded to a monitoring platform, and the emission amount and the emission proportion of different greenhouse gases are calculated on the monitoring platform based on a hierarchical accounting model; according to the global warming potential value, the emission amount of each greenhouse gas is converted into corresponding carbon dioxide equivalent emission data, and the carbon dioxide equivalent emission data and the emission proportion are dynamically displayed through a visual interface. According to the method, continuous automatic extraction and on-line monitoring are carried out on various greenhouse gases, the accuracy of a carbon dioxide equivalent conversion result is improved, the steps are integrated into an automatic closed-loop process, and the splitting state of data acquisition and accounting links is eliminated.

A thermal management fluid conversion kit includes at least one component selected from the group consisting of at least one low global warming potential (GWP) service port connector sized to fit over a high GWP refrigerant service port of an air conditioning (A / C) system, a recharge hose for charging a miscibility additive to the A / C system, an additive container containing the miscibility additive, a retrofit label meeting SAE J639 standards, conversion instructions for converting the A / C system from operating with a high GWP refrigerant to operating with the low GWP refrigerant, and combinations thereof.

The present application relates to a kind of method for using CH3CL and C2HCLF4 as raw material co-production R244bb and R1234yf, using the following steps: step one: take chloromethane raw material and tetrafluoro-chloroethane raw material, standby;Step two: the chloromethane raw material and tetrafluoro-chloroethane raw material in step one, in conventional cracking furnace, carry out cracking reaction, generate R244bb and R1234yf product;Step three: when CH3CL and C2HCLF4 cracking release one H+ Ion and one CL- ion, generate one HCL molecule in the cracking reaction in step two, product is R244bb, R244bb is C3H3CLF4;Step four: when R244bb continues to remove one HCl in the cracking process in step three, product is R1234yf and HCL;It avoids the problem of high global warming potential brought by directly using R124, improves environmental performance.