Photo: BSS

KHULNA, Nov 22, 2025 (BSS) - Bangladesh has marked a major stride in renewable energy innovation as engineer Md Hasan Zahir, an inventor from Abhaynagar upazila in Jashore, has developed a new technology with the potential to transform sustainable power generation worldwide.

Zahir, a mechanical engineer and graduate of Chattogram University of Engineering and Technology (CUET), has more than 23 years of experience in the power and industrial sectors. 

A former plant manager at Confidence Power and Energy PLC, he is also known for developing windmill design software.

Driven by a commitment to innovation, sustainability and national development, he has created the Natural Draft Wind Energy Tower (NDWET), which recently received a patent from the Department of Patents, Designs and Trademarks (DPDT).

The NDWET system introduces a distinct method of clean electricity generation by harnessing natural convection and pressure differences to produce continuous airflow. 

This airflow powers advanced turbines installed at the tower's base, enabling round-the-clock electricity generation, even in regions where traditional wind or solar systems are unreliable.

Speaking to BSS, Zahir said the NDWET concept is designed to deliver stable, uninterrupted power while occupying minimal land. He said the system opens a new avenue for energy access in developing countries where environmental and infrastructural constraints often hinder the deployment of conventional renewable solutions.

Unlike standard wind turbines that depend on external wind and solar panels that require sunlight, NDWET generates its own internal airflow using temperature gradients and a specialized structural design. 

As a result, it operates as a self-sustaining, low-maintenance and scalable technology suitable for both off-grid locations and urban settings.

Energy experts believe the innovation could significantly strengthen energy security in Bangladesh and other developing nations. 

They say the technology can reduce reliance on fossil fuels, support climate change mitigation efforts through zero-emission electricity, and offer a cost-effective alternative in areas where traditional renewable systems face limitations.

The invention has already drawn attention from energy researchers and sustainability advocates for its potential to redefine wind-based power generation.

To commercialize the technology, Zahir has founded a clean-tech startup named G Energy. The company is currently seeking equity investors and strategic partners to help scale and deploy the NDWET system. 

"With proper investment and collaboration, we believe NDWET can reshape the renewable energy landscape not only in Bangladesh but across the globe," he said.

The startup is now working on pilot installations, refining the design for large-scale production, and exploring cooperation with governments, NGOs and private-sector groups interested in sustainable energy technologies.

Simulation visuals of the NDWET system illustrate airflow behavior, turbine placement and overall structural efficiency, showing how the tower maintains consistent performance regardless of external weather conditions.