Publications by João Nuno Gomes Borga Delgado

Hill chart modelling using the Hermite polynomial chaos expansion for the performance prediction of pumps running as turbines

François Avellan, Loïc Andolfatto, João Nuno Gomes Borga Delgado

Pumps running as turbines are suitable hydraulic machines for micro hydropower applications. The selection of the proper pumps to install in a given site still remains a major challenge, as pump manufacturers do not provide the characteristic curves data i ...

Elsevier2019

Variable speed operation of centrifugal pumps running as turbines. Experimental investigation

François Avellan, João Nuno Gomes Borga Delgado

Pumps running as turbines are pointed out as a cost-effective solution for energy recovery in pressurised water supply systems. However, these hydraulic machines feature low efﬁciency under variable discharge operation due to the lack of an inlet ﬂow contr ...

Pergamon-Elsevier Science Ltd2019

Pumps running as turbines for energy recovery in water supply systems

João Nuno Gomes Borga Delgado

Pressurised water supply systems are infrastructures that offer a potential for energy recovery in locations where these systems operate with an excessive pressure. The integration of micro hydropower plants for energy recovery is a challenge, as these sys ...

EPFL2018

Analytical hill chart towards the maximisation of energy recovery on water utility networks with counter rotating micro-turbine

François Avellan, Elena Vagnoni, Loïc Andolfatto, Cécile Münch-Alligné, João Nuno Gomes Borga Delgado

Existing water utility networks provides a wide, distributed and unexploited hydropower potential. The installation of energy recovery stations on existing infrastructures limits both the required investment and the environmental impact. The counter-rotati ...

2015

Application of Laser Doppler Velocimetry to the development of a counter rotating micro-turbine

François Avellan, Elena Vagnoni, Loïc Andolfatto, Cécile Münch-Alligné, João Nuno Gomes Borga Delgado

The sustainability of the electricity mix can be increased by introducing recovery energy systems on existing water supply infrastructures. The concept of the new counter rotating micro-turbine presented in this work is a competitive option for energy reco ...

2015

A search and retrieval framework for the management of copyrighted audiovisual content

Eliazar Rodriguez Garcia, Frédéric Dufaux, João Nuno Gomes Borga Delgado

This paper presents a search and retrieval framework that enables the management of Intellectual Property in the World Wide Web. This twofold framework helps users to detect digital rights infringements of their copyrighted content. In order to detect poss ...

2008