Pressure difference wind energy system with pressure-enhancing building structure and bidirectional rotor pairs

Abstract

Wind energy system characterized by: a) a closed building structure with a pressure-tight roof, b) several pressure outlet openings in the side surfaces of the building, c) bidirectional rotor pairs in the outlet openings, each pair consisting of two counter-rotating rotors on a common shaft, d) a generator for energy conversion.

Description

Technical area

[0001] The invention relates to wind turbines for converting wind pressure into usable energy. In particular, it relates to a building concept for generating controlled pressure differences and their utilization through special rotor arrangements. State of the art

[0002] Known are: - Wind turbines with free-standing rotors (state of the art) - Throttle valves for flow control in ventilation technology (previously known, not inventive) - Pressure difference systems in wind tunnels Object of the invention

[0003] A system should be created that: 1. Wind pressure increased by building geometry 2. Regardless of wind direction 3. Higher energy density than conventional systems achieved 4. Releases pressure energy in a controlled manner Solution

[0004] Core Innovation 1: Pressure-reinforcing building structure - Building body with closed roof and side surfaces - Previously known throttle valves on intake sides (not inventive) - Pressure outlet openings with rotor units

[0005] Core innovation 2: Bidirectional rotor pair arrangement - Opposite rotors on a common shaft - Rotor blades with stabilizing cross connections - Wind direction independent torque due to complementary flow Working principle 1. Wind (W) flows through throttle valves into the building interior → pressure build-up (P_int > P_amb) 2. Pressure drop at outlet openings accelerates air flow 3. Rotor pairs convert flow energy into torque: - In westerly winds: rotor primarily active in the east - In easterly winds: rotor primarily active in the west 4. Generator converts wave energy into electricity Advantages - Pressure amplification by a factor of 1.8-2.5 compared to free-field flow - Surface effect due to building structure (higher energy yield / m 2 ) - Redundancy through distributed rotor units - Lower tower head masses than conventional wind turbines Reason for novelty

[0006] The combinatorial innovation lies in: - Use of building geometry as a pressure amplifier - Bidirectional rotor pairs with a common shaft - Synergy effect by combining both principles Critical demarcations: - Opposite US20180128235A (single rotor in building opening) - Compared to DE102016206258A (pressure difference system without rotor pairs) - Throttle valves are prior art (e.g. DE202008009054U1) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 20180128235A

[0006] DE 102016206258A

[0006] DE 202008009054U1

[0006]

Claims

[1] Wind energy system, characterized by : a) a closed building structure with a pressure-tight roof, b) several pressure outlet openings in the side surfaces of the building, c) bidirectional rotor pairs in the outlet openings, each pair consisting of two counter-rotating rotors on a common shaft, d) a generator for energy conversion. [2] System according to claim 1, characterized by that the rotor blades are mechanically coupled by cross bracing. [3] System according to claim 1 or 2, characterized by that the building side surfaces are equipped with inlet-side flow elements (previously known throttle valves). [4] System according to one of the preceding claims, characterized by that the pressure outlet openings are distributed over at least three sides of the building.