Pressurised water transport and its energy certification. The ENERGOS tool

This paper analyses the energy performance of simple pressurised water transport systems, in which a pipe transfers water from the point of origin to the end. The aim of the analysis is to evaluate the energy efficiency of the system and, on this basis, to formulate a proposal for energy certification. To do this, three representative values of the energy intensity indicator Ie, (kWh/m3) are calculated: the ideal energy intensity Iei; the real energy intensity Ier, the quotient between the energy actually consumed (kWh) and the volume transferred (m3) in the same period of time; and, finally, the target energy intensity, Ieo, the unit energy value assuming optimal real operation. The result of the Ier/Ieo quotient summarises the margin for improvement of the system and is therefore used to qualify its energy efficiency. The work concludes with a real example that reproduces the established procedure.