Wind power systems for heat production, storage and supply of living buildings: Powerful multisectional wind thermal systems

Figures 4.28 and 4.29 show schemes of the powerful multisectional wind power system for heat supply with overland and underground locations of water heat accumulators. The schematics use the following notation: a, b - wind power turbines (WPT); c - underground water heat accumulators.

The powerful thermal system includes a field of wind turbines and water heat accumulators. Water heat accumulators are a row of insulated containers aggregated with the heat exchangers. The system is designed for heat supply of residential neighborhood (housing estate) or small town with total living floor area (residential area) of 1200000 m2.

Table 4.3 lists parameters of wind power system of heat supply and traditional heat only boiler station on the natural gas, calculated for the next initial data: living floor area 1200000 m2; specific thermal power losses in the domestic buildings – 40 W/m2; average wind duration – 10 hours a day; duration of heating season – 6 months; average wind velocity for a given terrain – 7 m/s; energy conversion efficiency of wind power system – 0,9; specific heat capacity of coolant (water) - 4,2 kJ/(kgхK); working temperature range of thermal storage unit - 200C…700C…200C; energy conversion efficiency of the heat only boiler station on the natural gas – 0,9; heat of combustion of natural gas - 32,7 MJ/m3.

According with the calculations, a thermal storage of 4147 GJ (995,3 Gcl) of thermal power during a day is provided with the water volume of 20000 m3.

During 10 years of operation a 48 МW wind  power system saves near 22828000 m3 of natural gas with the cost ~ US$11,4 mln. Therefore, wind power station cost can not exceed of US$114 mln. Now, a market value for 115,2 MW wind power station (WPP) is ~ US$230 mln. But taking into account that WPP is using for heat supply only 6 months of heating season, in other season it can be used for electrical energy supply to electrical network. In this case, the cost if WPP is lowered by half, to US$115 mln. Thus, heat and hot water supply of buildings and structures can be one of the most effective ways to use wind energy.

Transfer of heating onto the alternative forms of energy allows reducing the consumption of organic power resources. In particular, the transition to the autonomous heat supply for individual homes and groups of homes eliminates the losses of thermal energy at its transportation, taking into account that communal enterprises supply heat energy to consumers using near 12000 km of pipe with greatly depreciated thermal insulation. 

In accordance with the laws of Ukraine "About energy saving" and "About heat supply" the work of state bodies should be directed to the organization of serial production of high-tech power equipment, machines, mechanisms, that ensure the efficient use of fuel and energy resources employing non-traditional renewable energy sources, secondary energy resources, and processes that replace critical fuels.

For effective targeted activities concerning organization and coordination in the field of energy supply systems the national, regional, local and other programs must be adopted to implementation. The responsible authorities must ensure conditions for conducting of complex researches in the field of heat supply, development of scientific bases of innovative energy-saving processes and technologies for thermal energy production.

Promotion of the modernization of heat supply technologies has to be done by giving tax breaks to manufacturers and users of energy-efficient equipment that works using renewable and unconventional sources of energy. Priority funding have energy-saving measures taken in accordance with the recommendations of the territorial state energy inspection authority, including the costs of research and development, production of prototypes and experimental installations, implementation of highly effective technological processes, equipment and materials.

Researches in the sphere of energy saving technologies and non-traditional types of energy, production and deployment of new types of energy saving equipment require subsidies and returnless budgeting.

 

By Vasil Sidorov on October 10, 2012 

Technopark QUELTA, Queltanews from

Nizhyn Laboratories of Scanning Devices

sidorovvasil@gmail.com

 


Comments

    No comments
Login

Comment