Analysis comparison of energy efficiency: CALENER vs TRNSYS

In an attempt to make buildings more energy efficient, several building certification tools have been implemented through software simulation. The European project USE EFFICIENCY is currently being carried out at 9 European universities. The aim of the project is to raise public awareness of energy efficiency and present university students as examples for energy efficiency. Spanish participation in the project consists of evaluating the energy efficiency of some of the buildings of the Universidad Politécnica de Valencia. To perform this evaluation, the official certification software CALENER GT is used. It simulates the energy requirements of a building during a year. Furthermore, this tool provides a rating which depends on the consumption ratio obtained in the simulation and the standard consumption rate (which can be obtained if the building fulfils the minimum construction requirements). Simulation software TRNSYS is becoming more widely used in order to perform energy audits. This paper compares the results of the energy efficiency measurements by using both tools; CALENER vs. TRNSYS. The results shown correspond to a real building in the north of the Universidad Politécnica de Valencia.