Solar energy in city
Recently to Kyoto in Japan has been signed an historical agreement that it will serve to safeguard the equilibrium of the planet. The protocol engages 38 industrialised countries to reduce in drastic way the responsible gas emission of the deterioration of ours climate. The start of application of the Convention on the Climate will define new measures of behavior. Of decisive importance they will turn out the city areas: it is in fact in the cities that the humanity produces the great part of emission of gases. Within of these strategies it turns out to be essential the use of the solar energy. The warm water production for sanitary uses with solar collectors represents a mature, reliable, simple technology and assures considerable economic savings. According to a relationship of the European Commission on the renewable sources (November 1997), from today until year 2010, solar collectors for a total of 90 million square meters will be installed. He is obvious that for these apparatuses they serve great spaces and in the cities the space available is limited. There are other problems to hold in consideration: the access to the structures must be limited to persons who can bring damage, the structures must be protected from the gale and from the cold of the winter, the structures must be installed more close possible to the customer so as to diminish the costs. Recently has been realised an innovative product to use in the apartments of the cities. It is a solar collector that it repairs the balconies from the sun and at the same time produces warm water to sanitary use.