Applying exergy analysis to an urban district thermodynamic system

The exergy analysis method has been contemplated to evaluate the energy impact on the environment of an urban district. The second Law analysis evaluates rational energy use from a thermodynamic point of view decreasing energy carriers' quality levels. The urban district scale has been chosen for two main reasons: the first is the importance to evaluate complex system where buildings are a part of a surrounding network. The second one is urban district scale includes highly integrated solutions that are not apparent on the scale of a building. The model is carried out considering the control volume as an open thermodynamic quasistationary system, not in thermodynamic equilibrium to the environment. The environment can be considered as a closed dynamic system: the urban district system continuously utilizes and exchanges energy with the environment. The ultimate aim of the model construction is to estimate surrounding impact of energy saving strategies and measures and to evaluate their "energy unsustainability".