The purpose of this study has been to conduct an energy diagnosis research of the third level. An energy diagnosis is a tool aimed to seek improvements related to measures of energy efficiency and saving, and environmental conservation as well. These improvements would prove to be relevant for any kind of building. The diagnosis was carried out in 36 university buildings (Renewable Energy Institute—REI) through survey and census; that in order (to identify and) to characterize current patterns of energy consumption and demand, as well as for generating specific strategies towards energy efficiency and saving, for instance the identification of systemic indicators and corrective proposals, and non-financial investment. The results promote the achievement of grand energy efficiency. The task on energy conservation entails the supporting participation of each person who either studies or works in the entity, whereas some other activities require economic stimulus for being implemented. Annual per capita energy consumption in the REI is 40 kWh/person: that is greater than the country’s average consumption rate. The main energy consumption corresponds to Building 3.1 (49% of total energy consumption). This is due to its large concentration of laboratories specialized in renewable energy research and innovation.

An energy diagnosis is a tool used to seek the improvement of energy saving measures, environmental conservation and energy efficiency, making relevant its implementation in any kind of buildings. For this article, an energy diagnosis of third level was carried out in buildings of the Instituto de Energías Renovables (IER) from Universidad Nacional Autónoma de México (UNAM) through survey and census of the 36 buildings in the IER, in order to characterize current patterns of energy consumption and demand, and generating specific strategies towards savings and energy efficiency, such as indicators and corrective proposals within and non-financial investment. Keywords:Energy diagnosis, energy efficiency, UNAM, IER, energy consumption and demand. IntroductionCurrently, renewable energy sources have become very popular due to their advantages in fossil fuel savings and the low or zero emissions of pollutants to the environment during power generation, but these sources still do not meet the energy needs, although they have been decisive in the solution of many energy problems, like in the case of rural electrification and water supply [1][2][3]. Thus, the so-called conventional energy sources, based on hydrocarbons or combustible fuels, it remains that the main energy source for both the residential and the productive sector [4]. Therefore, since it cannot be done without these types of energy carriers, it is necessary to strengthen saving measures and rational use of these energy potentials [1].However, saving and rational use of all energy forms will inevitable presupposes the application and control of a specific and detailed program for that purpose, which is designed from technically based methods or procedures, to identify, regardless of the place it was administered, the efficiency and accountability with which any energy type is used, mainly electricity. For this purpose, a set of elements that allows the performing and evaluating the energy diagnosis are provided [5][6][7].An energy diagnosis (DEN) is a tool that analyzes, measures, and evaluates in a systematic and objective way the main energy consuming equipment, systems and processes. Offering a possibility of improvement, modernization and savings thereof, which can lead to greater energy efficiency [8][9][10].With which, it allows to improve the conditions of the environment and the production in which it is wrapped, being able to overcome the current conditions of production and individuals' performance [11]. Normally the realization of an energy diagnosis, made by professionals in this field, lead to reduce production costs without negatively affecting the quality and quantity of it.Therefore, according to the CONUEE [12], the main objectives of an energy diagnosis are: to establish energy saving goals, to design and apply integral systems for saving energy, evaluate energy saving measures technically and economically and decrease energy consumption, without negatively affecting production levels and conditions. Although the energy diagnos...