Operating Range and Performance for VETT

VETT technology was developed to reduce costs per kW and provide shorter payback times for low-head hydropower projects. It is a cost-focused approach for economically challenging locations. 

Its technology purpose is to provide an alternative to archaic low-head hydropower turbines that are typically very large, slow rotating and too expensive for low-head projects. It does this by making use of the venturi principle to achieve a pressure amplification for conventional turbines, allowing the use of much smaller and faster turbines and thereby achieving a project cost reduction.

VETT is verified by England's Environment Agency as fish-safe with zero mortality risk, no noise emission and very little visual intrusion, allowing it to address problems that others can’t.

TURBINE DIMENSION AND SPEED

Figure 1: Turbine runner diameter in relation to head and flow

Figure 2: Turbine speed in relation to flow

OPERATING RANGE

VETT System	Flow range (per unit)	Head range
Standard VETT	2 -13 m3/s	1 – 5m
VETT-in-a-Box	0.5 – 2.7 m3/s

Figure 3: Power output with head and flow

For detailed assessments on annual energy output please contact us and provide us with flow and head duration data, if available. Please also get in touch if you have an upcoming project you'd like to discuss or if you have any questions:

Tel:     +44 (0) 203 696 4530

Email:  enquiries@verderg.com

VerdErg Renewable Energy has issued a set of Technology Sheets detailing VETT technology and the range of products available for customers. Visit the Download Centre on our website to view and download the full range: https://www.verderg.com/publications