Since few last years Colombia has increased considerably, almost of exponentially, the photovoltaic panels projects as a solution to two specific problems, the coverage to noninterconnected areas and the reduction of consumption of the network of energy national distribution. From 5 project approved in the 2016 to 46 in the 2017 within the framework of the 1715 law aimed at encouraging the use of not common alternative energy sources, is
noteworthy that this result highlights on other options which have not increased in more than 5% in the same time.
This work is a call to attention to the application of photovoltaic panels in uncontrolled way where, for a country with a relatively low price per kWh generated, the investment return points will comes long, causing so a dissatisfaction in the end user which meets a new system but who may lose their interest by fixing batteries or inverter signal problems, not showing your expected sustainability potential. For illustration example, we show the results of three hotels which were carried out within the framework of a State office call and that pretends different options for diversification of energy sources based on their consumption. The results showed that, despite the consumption which allowed work with partial supply and without batteries, the investment return points were over
7 years, making it a risky business. To the end, the work present a thermal solar generation cycle Rankine as an option for greater efficiency system generation that can better fit the energy environment Colombia conditions.
PhD. Camilo Andrés Arias Henao
Mechanical engineer and Magister in mechanical engineering at the los Andes University?Colombia. PhD. in energy engineering from the Sevilla University ? Spain. Research Professor in the areas of power generation by not common sources and energy efficiency in building. (HEAH, solar thermal and photovoltaic panels, supported by simulations in transient systems in Trnsys V17 and energy and exergy balance).