An exergy metric for building performance evaluation

摘要: Building energy performance evaluation is a key action to comply with EU Directive on Energy Efficiency in Buildings as well the regulations’ adoption at National level for Certificates and Label assignments. As matter of fact, comprehensive detailed analysis heat exchange existing buildings new ones still missing due complexity established procedures huge amount assess. For this purpose, an exergy audit considering designed indoor temperature, building envelope behavior heating production distribution systems allows computing more detail by including consumption whole system. This method could provide calculations summer season even simplifying shadows natural ventilation effects cooling demand their contribution variables complexity. The here described starts from LowEX tool developed IEA ECBCS Annex 37 framework elaborate final metric. Accounting conservation principle, total exchanged obtained addition each sub-system, i.e. envelope, generation Finally, efficiency system be calculated, comparing exchanges. By using approach, other indicators analyzed, i.e Tonne Oil Equivalent (TOE), CO2 emission fossil fuel consumption. Among those ones, ratio between TOE produced represents parameter. latter tested case study.Building An...