Field demonstration of new MHP energy recovery in Ireland and Wales

Feasibility of MHP potential in real networks

The Dŵr Uisce Project aims to aid in reducing the energy consumption and CO2 emission of the water industry, and to decrease the associated costs of water supply and treatment. Several technology platforms are being developed as part of the project, part-funded by the Interreg Ireland Wales Co-operation programme 2014-2020.
Hydropower energy recovery in water supply networks is one of these technology platforms, and in this context a key element of the project is the demonstration of the micro-hydropower (MHP) potential in real networks. For this purpose, the feasibility of MHP implementation in group water supply schemes has been assessed.

 
 

As a first step, the potential of MHP is analysed at specific locations of the network, such as pressure reducing valves (PRV), break pressure tanks (BPT) or some other locations with clear potential, whereby the feasibility of specific low-cost MHP technology, pumps as turbines (PAT’s), is assessed.

 

Transient analysis in pipe networks

Once the demo-sites are selected, the pipe network has to be prepared for allocating the new hydropower facility. The new scheme must be able to support the transient pressures produced by phenomena such as turbine runaway, trip-off, emergency valve or sudden bursts.

To cope with this, a transient model, which reads EPANET networks and solve the classic waterhammer equations, has been implemented. The video bellow shows a waterhammer event simulated in one of the group water schemes assessed.