10-07-202656
As global energy demand continues to rise, creating independent and environmentally clean energy sources for urban populations is becoming a matter of paramount importance. Renewable energy sources — wind and solar in particular — are considered the most promising solutions in this regard.
In recent years, changes in climate systems, the increasing concentration of greenhouse gases in the atmosphere, and the depletion of conventional energy reserves have been compelling nations to seek new and sustainable energy pathways. Against the backdrop of limited natural resources and the growing significance of energy security, interest in renewable sources has intensified sharply. Current forecasts indicate that by 2026, demand for electricity could grow by an average of 3.4% per year. This process is driven by rising economic activity, expanding consumer capacity among the population, and higher levels of industrialization. Furthermore, the rapid growth of energy consumption in developed countries is accelerating as a result of the proliferation of electric vehicles and the expansion of residential systems.
Although the growth in energy demand is assessed as a positive economic indicator, it simultaneously creates the imperative to accelerate progress toward global decarbonization goals. In other words, the widespread introduction of clean technologies in energy production is becoming a vital necessity for ensuring ecological sustainability.
It is precisely in this context that numerous researchers, scientists, and engineers are developing and implementing a variety of projects and concepts. One such solution is the emergence of small wind generators designed for installation on multi-storey residential buildings in major metropolises. While the use of wind generators in open and expansive areas is well established, these compact generators differ in that they can be deployed within urban environments as an additional renewable electricity source directly within households.
Technological Solution: Mini Wind Generators
Manufacturing via 3D Printing
Producing mini wind generators using 3D printers offers affordability, speed of production, and the possibility of custom design. In addition, this method provides the potential for years of operation and subsequent recycling.
Key components:
• Blades (rotors) — convert wind energy into mechanical motion.
• Generator housing — accommodates the motor and gearbox.
• Mechanical shaft and bearings — ensure the transmission of motion.
The use of plastic and composite materials enables the production of lightweight, durable, and safe generators.
Installation Conditions on Multi-Storey Building Facades
Wind speed on urban balconies may be relatively low; however, on upper floors the airflow is sufficiently strong. An anemometer is used to measure the direction and speed of wind on the balcony.
The following factors are taken into account during generator installation:
• wind direction;
• balcony structural configuration;
• impact on neighbouring residents.
Collection and Storage of Electrical Energy
Battery Selection
Mini generators produce current at 12V or 24V. Lithium-ion or gel batteries are used to store this current.
Key selection criteria include:
• capacity (Ah);
• number of charge/discharge cycles;
• size and weight.
Charge Controller
A charge controller is installed to ensure correct transmission of current from the generator to the battery and to prevent overcharging. The controller monitors current voltage, protects the battery, and distributes electricity to household appliances.
Application in Household Devices
The current stored in the battery can be used to power the following devices:
Device
Average Consumption
Operating Time (depending on battery)
Smartphone charger
5 W
10–15 charges
Laptop
40–60 W
1–2 hours
Wi-Fi router
10 W
10+ hours
LED lamp
5–10 W
15+ hours
This solution serves as an independent energy source during power outages.
Environmental and Economic Advantages
Environmental Impact
• Reduction of carbon footprint
• Silent operation
• Renewable resource — wind
Economic Analysis
• 3D printing production cost: $50–$100
• Battery and controller: $100–$150
• Total expenditure: $200–$250
• Monthly savings on electricity bills: $10–$20
Scientific Research and Pilot Projects
Germany — The Fraunhofer IWES Institute examined the feasibility of installing small wind generators on balconies and rooftops in urban settings. The project analysed the aerodynamics of vertical wind turbines, noise levels, and energy efficiency. These studies were carried out through pilot installations in Berlin and Hamburg.
Japan — Tokyo Institute of Technology (Tokyo Tech) implemented a test project involving the installation of vertical wind generators on high-rise buildings in Tokyo to power Wi-Fi routers and LED lighting systems. The project utilised turbines manufactured by 3D printing and tested energy storage technology using batteries.
United States — The NYSERDA agency in New York carried out a pilot project on producing electricity through vertical wind generators installed on the facades of multi-storey buildings and utilising that electricity in household devices. The project analysed the efficiency, safety, and economic aspects of various turbine types.
Similar projects can be implemented in Uzbekistan as well, enabling a gradual path toward energy independence. Notably, domestic wind generators are already available for purchase on online marketplaces, with specifications as follows:
Parameter
Value
Fuel type
Wind
Power source
Wind energy
Product weight
12 kg
Voltage
220 V
Output power
3,000 W
Special feature
Lightweight construction
Colour
Silver
Motor type
Wind
In Uzbekistan, it is possible to purchase domestic wind generators on online marketplaces for $200–$400. These devices are suitable not only for powering small household appliances but also for use with larger household equipment.
Conclusion
Installing 3D-printed mini wind generators on the facades of urban multi-storey residential buildings represents not only a technological innovation but also a practical solution leading toward ecological sustainability and energy independence. This approach enables residents to have their own renewable energy source within the home, remaining independent from power outages. The solution offers numerous advantages: energy efficiency, reduction of the carbon footprint, economic effectiveness, and enhancement of energy literacy among the population.
The pilot tests conducted in Germany, Japan, and the United States confirm the effectiveness of this technology in urban conditions. In Uzbekistan, the implementation of similar projects would allow for the diversification of the national energy system and the satisfaction of the population's need for sustainable energy.
These initiatives are fully aligned with the United Nations Sustainable Development Goals (SDGs):
• Affordable, reliable, sustainable and modern energy for all: providing the population with independent and clean energy sources through mini-generators.
• Sustainable cities and communities: enriching urban infrastructure with ecological and innovative solutions.
• Climate action: finding solutions to global climate challenges through the reduction of the carbon footprint and the widespread introduction of renewable energy sources.
Accordingly, introducing the practice of installing mini wind generators on the facades of urban multi-storey residential buildings is of strategic importance not only from a technical perspective, but also from social and ecological standpoints. Intensifying research in this field, state support, and civic participation will make it possible to create a sustainable energy future for Uzbekistan.
Chief Specialist, Centre for Sustainable Development
Shukhrat Khojimurodov