Wind power systems for heat supply of settlements: Technical and economical benefits of WPPs

The main technical and economic advantages of WPPs are:

High energy conversion efficiency. Theoretical value of energy conversion efficiency ranges within 0…100%, but in practice is 20 ...70%. Average energy conversion efficiency is within 25 …30%; 

Short period for design and construction;

Possibility to create wind turbines for various powers. Wind turbine dimensions vary in a wide range – from small turbine with a power of 100 kW, to large turbines with a power 6 and blade lengths exceeding 60 m. Most often wind turbines are grouped on one territory, creating the wind farms. To prevent the mutual influence of turbulent flows, wind turbines are located at sufficient distances one from another (5…15DR. where DR is rotor diameters);

Financial indicators. Figure 4.13 illustrates cost of installed power and cost of electrical power unity for wind power plants in comparison with other power technologies. According to the cost of installed capacity the WPPs overcome all other power plants. The cost for wind energy does not depend on the world oil price fluctuations;

The development of wind power plants does not require of the developed infrastructure (roads and so on) for the period of construction; presence of concentrated industry, megalopolis, urban sites; employment of powerful transmission lines; management by big corporations with highly qualified personal and high salaries. Wind power projects are short term of design and building.

The technological problems that hinder the construction of wind farms (fig. 4.14) are the deficit of wind power resources, employment of macroscopic elements of working body (wind flows), massive turbine and electrical generator rotors; indirect action of macroscopic wind power systems, necessity in several stages of energy transformation, and dependence of electricity production from the availability of stable wind flow. This factor in particular causes low capacity factor value (30%), and requires using electrical batteries in the absence of wind. Another problem is the obstacles for bird migration, some noise effects, as well as interference for transmission of television signals. 

 

Directions for the development of wind power technologies and equipment. The main trends for development of the wind power technologies and equipment are the next (figures 4.15 and 4.16):

·        increasing of the level of wind power resources using; 

·        construction of the offshore wind power farms;

·        increasing of energy effectiveness of  the wind turbines;

·         reduction of the costs of building, connection to grid and operational maintenance of the WPPs; 

·        development of the new energy effective wind power technologies and equipment;

·        integration of wind power technologies with other renewable power technologies and equipment; 

·        reduction of environmental load of wind power equipment on the adjacent territories.

 

By Vasil Sidorov on October 10, 2012 

Technopark QUELTA, Queltanews from

Nizhyn Laboratories of Scanning Devices

sidorovvasil@gmail.com

 


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