Issn 0003-701X, Applied Solar Energy, 2009, Vol. 45, No. 2, pp. 96-98. Allerton Press, Inc., 2009

 
The project goal
is to develop a pilot combined
solar and hydrogen power complex with total capacity
up to 5 kW that is intended for power supply of the indi-
vidual farm cottages and farmsteads in the rural, pied-
mont, and desert regions of Central Asia. For the dem-
onstration of the capabilities of this complex, we
selected the exhibition hall at the solar site of the Mate-
rials Technology Institute of the “Physics-Sun” Scien-
tific Production Association of the Uzbek Academy of
Sciences in Tashkent.
In order to achieve this goal, several tasks are to be
accomplished in the first stage, namely:
—determine the specific (kW/m
2
) electric and heat
power consumption of the exhibition hall of the Mate-
rials Technology Institute of the “Physics-Sun” Scien-
tific Production Association of the Uzbek Academy of
Sciences in Tashkent;
—determine the exhibition hall power expenditures;
—gather and study scientific and engineering infor-
mation on similar projects;
—analyze the information obtained and develop the
initial data for developing the technical specification
for the creation of the pilot installation;
—manufacture and test the combined solar and
hydrogen power complex;
—experimental operation and development of the
feasibility study for replication of the pilot project;
—instruction and training of the potential users of
the complex.
Full-scale implementation of this project is to be
carried out in the second stage. To accelerate the oper-
ation and reduce the costs, the faceted concentrator
with diameter five meters that is located at the solar site
is to be used.
Comparative characteristics of Uzbek and French solar furnaces
Countries
Focal 
concentration
Mirrored surface 
midsection area, m
2
Effective 
diameter, m
Radiant flux density 
in focal zone, W/cm
2
Mirror reflection 
factor
Uzbekistan
11000
2000
50.46
850
0.7
France
10000
1923
49.5
800
0.7
 
1
2
3
4
Heat balance distribution of overall utilized energy of
concentrated solar radiation incident on steam boiler:
 
1
—
 
QH
= 5.5%; 
 
2
—
 
Q
 
el
= 33%; 
 
3
—
 
Q
 
hs
= 25.03%; 
 
4
—
Σ
 
Q
 
hl
=
36.47%.

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98
APPLIED SOLAR ENERGY
Vol. 45
No. 2
2009
ABDURAKHMANOV et al.
It is estimated this concentrator will provide about
9 kW of output power with average solar radiation
700 W/m
2
, considering the closed nature of the cycle,
that is, almost full usage of the concentrated solar
energy and the achievement of five kW of power at the
output of the complex is realistic.
The concentrator will be upgraded in the course of
the project, namely:
—renewing the facets of the mirror coating;
—adjusting the concentrator;
—developing and mounting the concentrator rota-
tion electric drive in accordance with the azi-
muth/zenith scheme;
—developing and mounting the automatic control
system.
The second quite complex and tedious problem is
developing and manufacturing the turbine and electric
generator equipment. Then it is necessary to develop a
programmable system for automatic control of the
entire system by a PC. This system includes daily test-
ing of all the elements of the complex; specification of
the data for operation on the given day: the regimes of
generation of the hydrogen, electric power, and thermal
energy for heating or air conditioning the exhibition
hall; transition to the accumulator batteries when sun-
light is not available or the direct solar radiation falls
below the specified level.
In the course of the tests and pilot operation, the
potential users and engineering students will be trained
at a summer school.
The feasibility study will be developed with orienta-
tion to maximal use of domestic raw materials, compo-
nentry, and developed technologies. This will make it
possible to create a solar energy complex with eco-
nomic and operational indices that are adequately
attractive for the users.
This pilot project implementation allows for its rep-
lication for the Uzbek rural, piedmont, steppe, and
desert regions; and also export of the project documen-
tation or the organization of special production in order
to enter the markets of the countries of Central Asia,
Middle East, Africa, and Latin America.
REFERENCES
1. Zakhidov, R.A. and Anarbaev, A.I.,