Abstract
A Pump as Turbine (PAT) is a renewable energy technology that can be a cost-effective and reliable alternative to hydraulic turbines in micro and small hydropower plants. In order to further favour PAT exploitation, a general procedure that allows the identification of the most suitable turbomachine to install is required. To this purpose, this paper develops a novel methodology aimed at selecting the best PAT that, among several alternatives, maximizes energy production. The methodology comprises two steps, which only require the knowledge of the best efficiency point of the considered pump and the hydraulic parameters of the site. The novel methodology is validated in this paper by calculating the electrical energy production of a simulated water distribution network coupled with several PATs, whose performance curves, both in direct and reverse modes, are taken from the literature. For the sake of generality, the considered turbomachines account for different geometrical characteristics, rotational speeds and operating ranges.
Highlights
Micro and small hydropower plants are one of the most important renewable energy resources in small localities, OECD countries, rural and remote areas
This Section discusses the effectiveness of the methodology to identify the best Pump as Turbine (PAT) to install in the considered Water Distribution Networks (WDNs)
This paper dealt with the development of a novel comprehensive methodology aimed at selecting the best Pump As Turbine (PAT) that, among several alternatives, allows the maximization of electrical energy production
Summary
Micro and small hydropower plants are one of the most important renewable energy resources in small localities, OECD countries, rural and remote areas. They require alternative hydro generating systems compared to large-scale plants. The same authors discussed the installation of a PAT within a wastewater sewer of an oil refinery. In this case, the energy recovery throughout one year of operation was roughly equal to 19 MWh [3]
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