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Air Conditioning with renewable energy is a key issue in the region's energy policy. The high temperatures usually attributed to climate change and the increase of the standard of living in society continues increasing energy demand in order to establish the conditions for thermal comfort in buildings. Solar air conditioning, although it contains a mature technology, its level of market introduction and acceptance by designers of buildings is exhaustive. This paper discusses the feasibility of these projects, identifies non-technological type barriers that hinders such use and implementation of solar energy for air conditioning systems, and finally, it approaches some criteria and recommendations to overcome these obstacles. [ABSTRACT FROM AUTHOR]

In this paper, we make a critical assessment of the main motivations for the development, use and policymaking of biofuels through state of the art studio. From this it shows that the expected expansion in biofuels through state of the art studio. From this it shows that the expected expansion in biofuels production is due to benefits they offer, as a contribution to mitigating climate change and reducing global dependence on scarce and uncertain oil supplies and on the other hand, helps to reduce oil prices. Also there are a number of motivations that drive the search for alternative energy sources, within which biofuels production holds great interest today, these are grouped in three areas: environmental, economic and political, and of social nature. Among them are identified as key environmental pollution, demand and energy security reasons. To these positive elements are opposed a number of difficulties in the development and use of biofuels. Among them are those related to the availability and sustainable supply of feedstock, limiting properties and others that change over time, there are many users who are not familiar with them. Considering that the major fraction of the costs in biomass power generation originates from logistics operations, these systems have to be located near the source of biomass and hence be decentralized. The size depends among other factors on the availability of biomass. [ABSTRACT FROM AUTHOR]