Air conditioning refrigerant replacement in sustainable development

3。 1 the concept of sustainable development of the concept of sustainable development is the result of environmental protection. Sustainable development thought is gradually formed after the 70 s. In 1980, the United Nations called on to the rest of the world: 'must study the natural, social, ecological and economic development and basic relations in the process of natural resources, to ensure the global sustainable development. 'In 1987, the United Nations world commission on environment and development in the report our common future, sustainable development is to point to' meet the needs of modern people, and does not damage the ability of future generations to meet needs of the development '. This definition in 1992, the United Nations conference on environment and development have the consensus of all countries. Sustainable development refers to the coordination of ecological, economic and social development. The ecological sustainable development on the basis of nature conservation, and the bearing capacity of resources and the environment. At the same time of development, must protect the environment, including the control environmental pollution and improve the environment quality, protecting biodiversity and ecological integrity of the earth, the guarantee in the form of continued use of renewable resources, keep the development of human beings in the earth's carrying capacity. 3. 2 refrigerant alternative to the sustainable development in the current environment of warming caused by climate change, has become a global environmental problems such as the hole in the ozone layer, if left unchecked will pose serious challenges to human survival and development. Therefore in the process of refrigerant replacement research should strengthen the protection of ecological environment consciousness, can not only see immediate interests, and at the same time should pay attention to the ecological environment and human coordinated, sustainable development. Sustainable development is the core of economic development and protection of resources, protect the ecological environment coordinated, in order to allow future generations to have sufficient resources and good natural environment. Through the refrigerant replacement in recent years, the progress of the work we can see that people no longer only pay attention to the thermal properties of refrigerants, and pay more attention to the environmental protection. Refrigerant before signed the Montreal protocol research general with good thermodynamic properties and physical and chemical properties, such as series of CFC R11, such as R12 has good thermal performance and chemical stability, non-toxic, non-flammable, no explosion, etc. , but the destruction of the ozone layer has great effect, and can cause the greenhouse effect. After signed the Montreal protocol, the first consideration in the study of alternative refrigerants to reduce refrigerant to the destruction of the ozone, for example, as a series of R22, though still have a damage effect on ozone but much smaller than the R11 and R12. HFC refrigerants such as everything has no any damage to ozone. In 1997 signed the Kyoto protocol puts forward very high requirements for refrigerant replacement, is also more complied with the requirements of the sustainable development of environment, it not only requires alternative refrigerants have lower the ODP, and have low GWP, such HFCs are in danger of elimination. Can be seen from the above content, in the alternative refrigerant is the invisible hand environmental sustainable development in plays a role, it not only promote the development of the refrigerant alternative research work, but also for the development of the refrigerant pointed out the development direction. 3. The development trend of 3 refrigerant in general development trend of the refrigerant should meet the requirements of the ecological environment sustainable development, and promote its further development. According to sustainable development in the economic development and protection of resources, protect the ecological environment coordinated core requirements, and the development direction of refrigerant have two: one is the environmental protection, the use of green refrigerant has been the trend of The Times, green environmental protection refrigerants can be synthetic, can also be a natural, although the synthetic environmental protection refrigerants and damage to the ozone will not, but from the perspective of the sustainable development of the earth's ecological natural refrigerant is the most ideal choice, because the natural refrigerant is existing in the earth's ecological system, whether to use or emissions to the environment, is to the back to the nature, the environmental impact is much smaller than synthetic refrigerants, believe that as technology advances, the natural refrigerant will certainly develop. Research work has been refrigerant replacement is along the direction of the development of environmental protection, and has on the environment played a large role in promoting sustainable development, in September 2003 to mark the international day of the ozone layer, the United Nations environment programme (unep) and the international meteorological organization issued by 37 countries in Paris 250 experts on the condition of atmospheric ozone layer to the joint assessment. According to the report, since the protection of the ozone layer after getting 183 countries signed the Montreal protocol, countries made a lot of effort, atmospheric ozone layer has appeared signs of recovery, but in the next few decades is still very fragile. Studies show that since 1998, destruction of stratospheric ozone layer has almost reached the level of gas vertices, but destroy the troposphere amount of chemicals in the ozone layer is decreasing at a slow speed. The form is: the hole in the ozone layer over the Antarctic has been expanding in recent decades, but the speed in recent years has been slow down below the level in the 1980 s; The hole in the ozone layer over the arctic are diminishing, it shows that the ozone layer is recovering.

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