REDUCTION OF EFFECT ON ENVIRONMENT IN THERMAL ENERGY SECTOR OF UZBEKISTAN WHILST SOLAR ENERGY...
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![Page 1: REDUCTION OF EFFECT ON ENVIRONMENT IN THERMAL ENERGY SECTOR OF UZBEKISTAN WHILST SOLAR ENERGY UTILIZATION. A.I.Anarbaev CAPACT Project July 4-6, 2007,](https://reader035.fdocuments.in/reader035/viewer/2022062423/56649cf95503460f949cad1f/html5/thumbnails/1.jpg)
REDUCTION OF EFFECT ON ENVIRONMENT IN THERMAL
ENERGY SECTOR OF UZBEKISTAN WHILST SOLAR
ENERGY UTILIZATION.
A.I.Anarbaev
CAPACT Project
July 4-6July 4-6, 2007, , 2007, AlmatyAlmaty, , KazakhstanKazakhstan, , 4/6/20074/6/2007
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Environment situation in Uzbekistan Legend:
Good
Normal
Moderate
Unsatisfactory
Extremal
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energy sector18,8%
community32,2%
construction0,2%
municipal sector16,1%agricultural
sector0,2%
industry28,2%
losses4,3%
for final consumption
76,9%
Electro-stations27,2%
Boiler compart-
ments67,7%
Other sources
5,1%
Structure of sale and consumption of thermal energy in Uzbekistan
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Emissions of thermal energy enterprises
• Amount of pollutant matters of thermal energy enterprises is equal to more than 200 thousand tones according to data of state statistic report.
• Total reduction of emissions to atmosphere is explained by change of fuel balance to the side of portion reduction of fired oil-fuel and increase of gas portion.
• 50% of carbon dioxide creating greenhouse effect goes into the atmosphere with emissions of pollutants from thermal energy enterprises at firing of fuel.
• Quantity of formed emissions of carbon dioxide depends on consumption and content of carbon in working mass of fired fuel.
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Problems municipal energy sector• Dependant scheme of joining of the central heating
loading under open scheme of water intake;• Low efficiency of thermo generating equipment of small
boiler compartments; • Imperfect construction of heat-insulation of heat
distribution networks;• Intensive internal and external corrosion of pipe lines;• Absence of thermal energy metering devices;• Big thermal losses in buildings due to imperfectness of
construction and construction materials;• Number of organizational and economic problems, in
particular: – Unreasonable low level of tariffs; – Insufficient level of payments collection;- Lack of financial resources.
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Helio-field of “Vodnik” boiler compartment in Tashkent
Boiler compartment with capacity of trap aggregates of 60 Gkal/h provides with central heating and hot water 98 apartment buildings, 66 municipal buildings and 4 plants (10 000 people)
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Technological scheme of solar system of water heating for boiler compartments
![Page 8: REDUCTION OF EFFECT ON ENVIRONMENT IN THERMAL ENERGY SECTOR OF UZBEKISTAN WHILST SOLAR ENERGY UTILIZATION. A.I.Anarbaev CAPACT Project July 4-6, 2007,](https://reader035.fdocuments.in/reader035/viewer/2022062423/56649cf95503460f949cad1f/html5/thumbnails/8.jpg)
Advantages of principal scheme of solar device of “Vodnik” boiler
compartment
• Heating in solar water heaters of most cold matter, therefore, achievement of highest efficiency of solar energy use and longer length of working season;
• The scheme allows directing through solar system all consumption volume of additional water which decreases final temperature of helio-heating;
• Solar water heaters are protected from corrosion in non-deaerated water due to limbation of the scheme.
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Remote control and management of geliosistem solar-fuel boiler
Provides automatic management by using the required temperature at the outlet of geliotehniks part
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Work and thermal efficiency of solar part of the boiler compartment
• Helio-system is implemented in type of helio-device to existing boiler compartment and serves for preliminary heating of additional water spent on needs of hot water supply, up to 25-35 0С.
• Up-heating to required temperature (65-700С) is implemented in traps, consuming gas
• According to the results of test exploitation from April to September at average temperature of helio-countour of 31-370С of average daily efficiency of helio-device was equal to 0,45÷0,63.
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Indicators Size Amount
Total area of collectors m2 820
Generation of thermo per year MWth 900
Annual average figure of radiation
kWth/m2 1944
Specific production ability of sections
kWth/m2 1097,6
Annual decrease of gas consumption
Thou-sand m3
220
Substitution of fuel by helio-device
% 5-7
Exploitation characteristics of solar and fuel boiler compartment in “Vodnik”, 2003
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Economic and environment indicators of boiler compartment “Vodnik”.
Indicators Size Amount
Capital investments Thousand EURO
192,73
Pay-back period years 10-12
Pollution emission reduction tones 2,4
Carbon dioxide emission reduction
tones 440
Area of helio-field of “Vodnik” boiler compartment with additional investments could be increased in 6 times and equal to 5 thousand m2. Substitution coefficient would be equal to about 30% from general annual thermal loading of boiler compartment.
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Development of water solar and fuel boiler compartments in Uzbekistan
Object
Parameter
boiler compartment “Mashinostroitelnaya-2”, Tashkent
In village “Agalyk” of Samarkand line department of magistral gas pipe lines JSC “Uztransgaz”
Set up capacity of boiler compartment
25 Kkal/h 1,8 Gkal/h
Year of coming into operation of the helio-field
2005 2005
Area of the helio-field 50 m2 250 m2
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Solar collectors on roof of boiler compartment “Mashinostroitelnaya-2”