Systematic Simplified Simulation Methodology for Deep Energy Retrofitting Towards Nze Targets Using Life Cycle Energy Assessment

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2019-08Department
Máquinas y Motores TérmicosSource
Energies 2019, 12(16), 3038Abstract
The reduction of energy consumption in the residential sector presents substantial potential
through the implementation of energy e ciency improvement measures. Current trends involve the
use of simulation tools which obtain the buildings’ energy performance to support the development
of possible solutions to help reduce energy consumption. However, simulation tools demand
considerable amounts of data regarding the buildings’ geometry, construction, and frequency of
use. Additionally, the measured values tend to be di erent from the estimated values obtained with
the use of energy simulation programs, an issue known as the ‘performance gap’. The proposed
methodology provides a solution for both of the aforementioned problems, since the amount of data
needed is considerably reduced and the results are calibrated using measured values. This new
approach allows to find an optimal retrofitting project by life cycle energy assessment, in terms of
cost and energy savings, for individual buildings as well as several blocks of buildings. Furthermore,
the potential for implementation of the methodology is proven by obtaining a comprehensive energy
rehabilitation plan for a residential building. The developed methodology provides highly accurate
estimates of energy savings, directly linked to the buildings’ real energy needs, reducing the di erence
between the consumption measured and the predictions.