The WAVENERGY.it S.r.l. is a limited-liability engineering company, which was set up in September 2005. The company is at present an academic Spin-off of the “Mediterranea” University of Reggio Calabria, with registered office in Via Francesco Baracca, trav. De Salvo , n. 8/a, 89123, Reggio Calabria (Italy).
The WAVENERGY.it S.r.l. has been established with the purpose to work in the design, maintenance, control, monitoring, and management of:
The company Wavenergy.it LTD was founded by prof. Felice Arena in September 2005 and, as previously mentioned, it is an academic Spin-Off: all promoting members were teachers and doctor (PhD) at the “Mediterranea” University of Reggio Calabria. The request for recognition as a spin-off company was made at the “Mediterranea” University of Reggio Calabria in June 2009. The Wavenergy.it LTD has been recognized as Spin Off of the Mediterranean University in July 2010. The REWEC3 device was conceived by Professor Paolo Boccotti (full professor on Ocean Engineering at Mediterranea University of Reggio Calabria) and patented by him both in Italy (Patent N.1332519) and in Europe (Patent N.EP1518052B1). Wavenergy.it LTD is the licensee exclusive of the patents. For further details on the open and past projects please go to the projects&events section on the website.
A brief overview of the REWEC3 technology
The REWEC3 device is composed by a chamber containing a water column in its lower part and an air pocket in its upper part. The air pocket is connected to the atmosphere via a small duct hosting a self-rectifying turbine. In addition to that, a REWEC3 includes a small vertical U-shaped duct for connecting the water column to the open sea. The working principle of the system is quite simple: by the action of the incident waves, the water inside the U-shaped duct is subject to a reciprocating motion (Fig. 1). This motion induces alternately a compression and an expansion of the air pocket, which generates an air flow in the air duct. A turbine coupled to an electrical generator, installed into the air duct, is driven in this way to produce electrical energy. From a design perspective, the main feature of the REWEC3 is the fact that the natural period of the water column inside the plant is determined at the preliminary design stage in order to match a desired period.
Figure 1. Working principle of a Resonant Wave Energy Converter 3. Left panel: behaviour under wave crest action. Right panel: behaviour under wave trough action.
From an engineering perspective, the REWEC3 compared with a conventional OWC introduces substantial improvements, useful in the perspective of wave energy exploitation. Specifically,
Some estimation of electricity production of the new REWEC3/U-OWC
Some examples of production of electrical power from REWEC3 devices are shown in Table 1 both for locations in the Central Mediterranean Sea as well as off the West coast of USA (California).
||MWh / Km / year
|Central Mediterranean Sea: Tyrrhenian Sea
|North-East Pacific coast: California (Oregon) USA
Table 1: The mean production (in 1 year) for a REWEC3 plant with a length of 1 kilometer