the circular profile of said at least one spiral turbine blade 12 and an imaginary plane perpendicular to the mean moving fluid direction directly to at least one second point within the most proximal downstream at least one intake void 14 forms an angle with said imaginary line tangent to the circular profile of the at least one spiral turbine blade that is between 0 u00b0 and 90 u00b0 in which said imaginary vector is positive with respect to the moving fluid direction the at least one concave compartment 11 may have at least one exit void 15 that is less than or equal in total area to said at least one intake void 14 said at least one exit void 15 may be oriented so that the moving fluid exiting is channeled towards the at least one intake void 14 of the most proximal at least one concave compartment 11 downstream if one is present the at least one spiral turbine blade 12 may be attached to an at least one shaft 13 thereby causing the at least one shaft 13 to rotate when said moving fluid drives the rotation of the at least one spiral turbine blade 12 the at least one shaft 13 may then be geared to a generator directly and or indirectly for the production of electrical energy said at least one.