According to the Pyongyang Times:
New type of wind turbines go on sale
A new type of small wind turbines made by the Aeguk Magnet Factory attract an increasing number of customers.
The new turbine with its blades spiral and conical in shape proves to be more advantageous than the three-blade propeller turbine.
Its utilization rate of wind is over two times as high as that of the three-bladed turbine, so it can be set up everywhere—both seaside and inland where the wind blows above two metres per second. And it can also be installed on top of public buildings and on the balconies of multi-storey flats.
With its blades relatively short, the turbine requires only one third of the previous area for installation and generates little noise and vibration.
All parts of the turbine are domestically made including the essential permanent magnet, and the cost is at least 75 per cent lesser despite better stability, said Kim Chol Song, manager of the factory.
Just a few months after the turbines went on sale, the products find growing demands in Haeju of South Hwanghae Province, Phyongwon of South Phyongan Province and other plain areas.
The factory has established a technical process for turbines with a capacity of 100-300W, which are widely thought to cost much less than solar panels in production.
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New type of wind turbines go on sale
Pyongyang Times
2015-10-28