Medidas de eficiencia energética en edificios comerciales públicos: caso de estudio centro integrado “25 de Julio” de la unidad de negocio Guayaquil de CNEL-EP.

Abstract

In the present study it has been shown that the building “25 de Julio”, of CNEL-EP, has a particular energetic behavior and is characterized mainly by a direct correlation with the external environmental conditions. We analyzed the database of monthly electric consumption, architectural information and the use of the building that was provided by CNEL EP and obtained by site visits. At the same time, specialized equipment was installed on the energy distribution board that allowed us to know in real time the operation of the air conditioning systems and total consumption, so that its energy behavior could be disaggregated. Based on the information collected by the installed monitoring systems in the period from April to May 2019, it was shown that the maximum demand which occurs during working hours is mainly due to the simultaneous use of the air conditioning systems. It is then calculated that these systems represent 77% of total building consumption while the base consumption (lighting, equipment or other electrical appliances) accounted for 23%. As a first stage in this study, strategies that do not require an initial investment by the building administrator are proposed; this aims to better manage energy consumption. In this sense, two measures are proposed: control vampire consumption mainly due to leaving on electrical equipment and air conditioning systems in hours that the building remains closed. Also control the hours of switching on and off of air conditioning equipment on the ground floor. In this paper, it is shown that the application of the aforementioned strategies results in an approximate monthly savings of 4.94%; which is equivalent to 10248 kWh, 3.94 tons equivalent of CO2 and USD 635.38 per year, considering the current rate without subsidy