With the ozone depletion and global warming increasingly serious, looking for environmentally friendly refrigerants became placed in front of the refrigeration industry an important exam.
Refrigerant refrigeration system of the working medium, which circulates in the refrigeration system, through changes in the state of its own thermal energy exchange with the outside world, so as to achieve the purpose of cooling. In the air conditioning system, through evaporation and condensation heat transfer of a working fluid, commonly known as Freon.
Freon can be divided into CFC, HCFC, HFC and mixed refrigerants.
Early chlorofluorocarbon products, referred to as CFCs, including R11, R12, R113, R114, R115, R500, R502 and other initial manufacturing found Freon chemically stable, non-flammability and toxicity have been widely used as a refrigerant used in household appliances, chemicals, fire-fighting equipment and other fields. The late 1980s, the production and use of CFCs peaked, the world's emissions of CFCs into the atmosphere has reached 20 million tons. Because they are in the atmosphere for several hundred years of life expectancy, stable chemical properties of Freon will be broken in the strong ultraviolet light, releasing chlorine atoms with ozone molecule chain reaction will occur, continue to destroy the ozone layer, the ozone hole a lot. Due to the damaging effects of the ozone layer, are classified as "Montreal Protocol" a controlled substance, it has been banned.
Then developed alternative hydrochlorofluorocarbon products, referred to as HCFCs, including R22, R123, R141b, R142b, etc., ozone depletion factor is only a few percent of the R11, so the current HCFC substances is considered CFC substances the most important transitional alternatives.
Late develop more environmentally friendly hydrofluorocarbons, referred to HFCs, including R134A, R125, R32, R407C, R410A, R152, with its ozone-depleting potential of zero, but will produce the greenhouse effect. In the "Montreal Protocol" does not require the use of the period, characterized as greenhouse gases under the Kyoto Protocol, "United Nations Framework Convention on Climate Change" in the.
Currently, all of the refrigerant used in household appliances, almost all CFC products, non-Freon refrigerant so far has not developed. The Government banned chlorofluorocarbons is a first class product, the relative number of hydrochlorofluorocarbons environmental products and hydrofluorocarbon refrigerants, but also have a long period of time.
With the application and development of the world's refrigeration and air conditioning technology, the demand for refrigerant is also on the rise year by year, to reach several hundred thousand tons of annual consumption. Therefore, from the long-term impact, the reactivated nature inherent natural refrigerants is the ideal choice to achieve sustainable development of the environment and resources.
February 29, 2016, Shenzhen, China, held a "friendly alternative for the Asia-Pacific Technology seminar room air conditioner industry environment", organized by the Environmental Protection Department of Foreign Economic Cooperation of Environmental Protection (MEP / FECO), United Nations environment Programme (UNEP) co-sponsored, Shenzhen Habitat and environment Committee co aims to further promote the domestic air-conditioning industry HCFCs phase-out and promote environment-friendly development of alternative technologies, to solve the technical barriers to trade and the promotion of flammable refrigerant alternatives facing. More than a hundred institutions officials from 28 countries in Asia Pacific and the relevant employees attended the seminar.
R290 as an environmentally-friendly refrigerant, there is no doubt become the protagonist of the meeting. R290, namely propane, as a natural hydrocarbon refrigerants exist in nature, is a new environmentally friendly refrigerant with zero ODP (ozone depletion potential), GWP (global warming potential) low characteristic, is hailed as the industry respect "the most promising environmentally friendly refrigerants," and in energy conservation, greenhouse effect control performance is excellent, as HCFCs in this regard, experts pointed out: perfusion R290 air conditioning in the home does not exceed 500g of the case, explosion unlikely, reliable technical support, R290 air conditioning security is much higher than the same liquefied flammable substances; secondly, R290 even burning, not only generate toxic carbon dioxide and water, do not appear as HFCs cooling agent combustion conditions toxic substances. Comprehensive terms, R290 flammability does not become hindered as room air conditioner refrigerant.
