Instalazio termiko hibrido baten energia- eta exergia-analisi dinamikoa

Resumen

Climate change is modifying the energy demand everywhere. This influences the way in which energy demand supply systems are sized and how they work, especially in systems designed for the long term. Thus, it is urgent to know the sources of renewable energy to exploit them in a sustainable way and to do so with systems that adapt their exploitation to the requirements of climate change. The system that mixes these two requirements is the heat pump. The heat pump is capable of exploiting energy sources close to the surrounding temperature and is an ideal technology for meeting the energy needs of applications with low thermal requirements. The energy demand of buildings is high, but domestic hot water for buildings and heating have a low thermal demand. Thus, the use of heat pumps in the thermal facilities of buildings ensures the energy transition and the flexibility to adapt to the new climate change scenario. In order to reduce energy demand as much as possible, it is necessary to know the degradation mechanisms of energy resources. Energy and exergy analyses are very useful tools to know the exergy destruction and the energy and exergy efficiency of a system. This paper presents a real hybrid facility containing in the generation block a ground-coupled heat pump and a gas boiler. The facility supplies a building with domestic hot water and heating. The dynamic simulation of the facility has been carried out with TRNSYS software and data for the application of energy and exergy analysis have been obtained. For the first time, a dynamic exergy analysis has been applied to a system consisting of a ground source heat pump and a gas boiler. The results obtained indicate that 71% of the exergy destruction occurs in the boiler and the exergy efficiency of the heat pump is 6%. The results obtained allow to improve the energy performance of this thermal facility.