由于正在研究(直接的和间接的)应用太阳热的技术种类繁多,所以要形成关于在将来应用太阳能的明确概念是极端困难的,同样预言那一种技术在什么时候具有工业上的吸引力也是困难的。为了揭示事物的本质,这遍论文假定:正在研究的所有太阳能技术在工业上将变得可行。人们对太阳能的热忱是由它可能小规模的应用而产生的,是由所设想的局部的政治社会利益而产生的。的确,局部的太阳能系统可以提供与木柴时代相类似的时代,在木柴时代能量的产生和消耗发生在 Because of the variety of technologies being studied (direct and indirect) that apply solar heat, it is extremely difficult to form a clear concept of applying solar energy in the future, and it is also predictable when that technology is industrially attractive difficult. In order to reveal the nature of things, this paper assumes that all the solar technologies under study will become commercially viable. People's enthusiasm for solar energy is due to its possible small-scale application, resulting from the local political and social interests envisaged. Indeed, local solar systems can provide an era similar to that of the firewood era, where the generation and consumption of energy takes place at