Volume 02 Issue 06-2022
80
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
80-83
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
Industrial and agricultural technological processes, heating and hot water supply, as well as the production of low and
medium temperature heat for air conditioning, are one of the main areas of use of solar energy. 25% of the energy in
the fuel and energy balance of the republic is consumed in heating and hot water supply. Also, in the radiation-climatic
conditions of the republic, the use of solar energy for heating and hot water supply is the most technically and
economically efficient. In the southern regions with the most favourable climatic conditions, 50 ... 70% of the total
amount of heat consumed in the field of housing and communal services is used for hot water supply. But the
requirements for hot water supply are much lower than for heating supply. As such factors show,
KEYWORDS
Radiation climate, solar energy, favourable climatic conditions.
INTRODUCTION
Science, technology and social development are
accompanied by an increase in energy consumption
and the use of its efficient forms. Currently, as a result
of energy development and increasing consumption of
Research Article
ANALYSIS OF THE PROSPECTS FOR THE USE OF ENERGY-EFFICIENT
ACTIVE SOLAR DEVICES IN UZBEKISTAN
Submission Date:
June 09, 2022,
Accepted Date:
June 19, 2022,
Published Date:
June 30, 2022
Crossref doi:
https://doi.org/10.37547/ajast/Volume02Issue06-12
Mirzabayeva Husnigul Umidjon qizi
Student, Fergana Polytechnic Institute, Fergana, Uzbekistan
Jaxongir Orzimatov Tojalievich
PhD, Assistant, Fergana Polytechnic Institute, Fergana, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajast
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 02 Issue 06-2022
81
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
80-83
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
natural energy resources, the reduction and use of
fossil fuels process a problem of negative impact on
the environment. The burning of large amounts of
fossil fuels is polluting the world’s oceans,
deforestation, the harmful effects of hydroelectric
power stations, the impact of thermal power plants on
water and air basins, and changes in the planet’s heat
balance [1-4].
One of the most pressing issues today is to strengthen
the modernization of the energy system, implement
measures to reduce energy consumption and
introduce an efficient energy-saving system and
reduce the number of fuel resources in the production
of thermal energy to world standards.
So, saving, rational and efficient use of energy
resources is a requirement of the time. Therefore, it is
necessary to develop thermal energy, to use
alternative
energy
sources
that
are
cheap,
environmentally friendly and highly efficient in energy
supply. In particular, it is advisable to regulate the use
of non-traditional and renewable energy sources in this
area [5-9].
MATERIALS AND METHODS
Solar collectors (air - or water heaters), heat carrier
circulation elements (air ducts, fans, pipelines, pumps,
heat exchangers) and heat accumulators are the main
components of active solar heating systems.
Active systems can be classified according to the
following characteristics:
On the function of hot water supply, heating and
combined systems;
On a seasonal, annual basis;
For individual, group, and centralized consumers;
1, 2 and multi-contour, by number of contours;
Depending on the availability and type of heat
source that can be substituted.
50 ... 70% of the total amount of heat required in the
heat supply is spent on hot water supply. There are no
stricter requirements for hot water supply than for
heating supply. Therefore, it is preferable to use a hot
water supply for solar heating.
Solar hot water supply systems can be natural
(thermosyphon) or forced circulation 1, 2 and multi-
contour. The main elements of such systems are solar
collector-water heater and tank-accumulator.
The tank-accumulator is installed higher than the solar
collector, and due to the density gradient, water
circulates under the influence of natural convection.
The disadvantage of two-contour natural-convection
systems is that their efficiency is low due to the small
water circulation rate. Forced circulation is used to
increase efficiency.
In active solar heating systems, the heat in the solar
collector is first transferred to the heat accumulator
and then to the room, during which time it is required
to adjust the absorption, accumulation and distribution
of solar heat.
Two-circuit systems with a tank-accumulator of water
heating systems are the most common. In such
systems, independent adjustment of some parts of the
system is ensured and the accumulator is not allowed
to overheat due to the additional heat source using the
bypass line.
Coordinated active systems provide both heating and
hot water supply. Additional heat exchangers are used
to heating the consumed water [8-11].
It is necessary to provide the operating mode of the
device of active solar heat supply systems with
automatic control systems. When water is used as a
heat carrier, it has specific disadvantages such as the
possibility of freezing the water in the solar collector
when the outside air temperature is negative and
corrosion of the system elements. Therefore,
antifreeze solutions are used as the primary heat
carrier [10-12]. The heat load for the heat supply is
determined by the following sum
Q
hl
h
hg
Q
Q
(1)
Volume 02 Issue 06-2022
82
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
80-83
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
Heat load for heating
u
б б
u
x
Q
К V t
t n
(2)
Heat load for hot water supply
uc
р
uc
cc
n
Q
G mС
t
t
N
(3)
The amount of heat produced from the solar collector
in period n
[
(
)]
ku
K
cc
t
k
ю
x
Q
K
t
t
n
F q
(4)
The efficiency of a solar collector is determined by the
following relationship
/
;
ku
k
Q
Q
(5)
Heat load
u ю
Q
solar energy
ku
Q
and
additional energy
source
m
Q
are covered by
uю
ku
m
Q
Q
Q
(6)
The share of solar energy or the coverage coefficient
to cover the heat load is determined by the following
expression
/
ku
uю
f
Q
Q
(7)
If the incident
q
ю
solar radiation [q] exceeds the limit
amount, in such conditions the solar collector
provides useful energy, ie:
0
[ ]
(
)
K
ю
cc
x
k
K
q
q
t
t
K
(8)
(8) shows that the heat transfer coefficient
K
K
the
smaller the light absorption capacity k and the optical
f.i.k.
0
so large and the amount of the limit
[ ]
q
will
also be so small. This is done by thermal insulation,
darkening the surface of the heat sink, corrugation,
corrugation, double glazing, selective coating and the
use of vacuum collectors.
CONCLUSION
As a result of studying and analyzing the literature on
radiation and temperature regimes, as well as solar
collectors, the following conclusions were drawn:
1.
In areas where solar radiation and temperature
regimes are favourable, the use of solar energy has
the most effective opportunities for heating and
hot water supply of housing and communal
services, individual and autonomous houses.
2.
In Uzbekistan, 30 ... 60% of the heat load required
for heating with passive solar systems can be
provided by solar energy.
3.
With the help of active solar systems it is possible
to save 35 ... 55% of the fuel used for heating and 45
... 70% of the fuel used for hot water supply.
REFERENCES
1.
Rashidov, Y. K., Rashidov, K. Y., Mukhin, I. I.,
Suratov, K. T., Orzimatov, J. T., & Karshiev, S.
(2019). Main reserves for increasing the efficiency
of solar thermal energy in heat supply
systems.
Applied Solar Energy
,
55
(2), 91-100.
2.
Rashidov, Y. K., Orzimatov, J. T., Rashidov, K. Y., &
Fayziev, Z. X. (2020). The Method of Hydraulic
Calculation of a Heat Exchange Panel of a Solar
Water-Heating Collector of a Tube–Tube Type with
a Given Nonuniform Distribution of Fluid Flow
Along Lifting Pipes.
Applied Solar Energy
,
56
(1), 30-
34.
3.
Madraximov, M. M., Abdulkhaev, Z. E., &
Orzimatov,
J.
T.
(2021).
Gidravlik
taran
Volume 02 Issue 06-2022
83
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
80-83
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
qurilmasining
gidravlik
hisobi.
Scientific
progress
,
2
(7), 377-383.
4.
Rashidov, Y. K., & Orzimatov, J. T. (2022). Solar air
heater with breathable matrix absorber made of
metal wire tangle.
Scientific-technical journal
,
5
(1),
7-13.
5.
Shodieva, G. M. (2006). Improving the well-being
of
the
household:
problems
and
their
solutions.
Monograph, T.: Fan
.
6.
Zikirov, M. C., Qosimova, S. F., & Qosimov, L. M.
(2021). Direction of modern design activities.
Asian
Journal of Multidimensional Research (AJMR)
,
10
(2),
11-18.
7.
Durmanov, A., Umarov, S., Rakhimova, K.,
Khodjimukhamedova, S., Akhmedov, A., &
Mirzayev, S. (2021). Development of the
organizational and economic mechanisms of
greenhouse industry
in
the Republic of
Uzbekistan.
Journal of Environmental Management
& Tourism
,
12
(2), 331-340.
8.
Rastopchina, Y., Primova, A., & Solovjeva, N. (2021,
July). Study of Uzbekistan’s Experience in
Developing Projects of Electricity Production from
Renewable
(Alternative)
Sources.
In
3rd
International Conference Spatial Development of
Territories (SDT 2020)
(pp. 122-127). Atlantis Press.
9.
Fayziev, P. R., & Khametov, Z. M. (2022). Testing
the innovative capacity solar water heater 200
liters.
American Journal Of Applied Science And
Technology
,
2
(05), 99-105.
10.
Fayziev, P. R., Tursunov, D. M., Khujamkulov, S.,
Ismandiyarov, A., & Abdubannopov, A. (2022).
Overview of solar dryers for drying lumber and
wood.
American Journal Of Applied Science And
Technology
,
2
(04), 47-57.
11.
Файзиев, П. Р., & Файзиев, Х. П. (2021).
Автономный
инновационный
медицинский
гелиоаппарат
для
лечения
простудных
заболеваний.
Academic research in educational
sciences
,
2
(11), 1454-1460.
12.
Файзиев, П. Р., Исмадиёров, А., Жалолдинов, Г.,
& Ганиев, Л. (2021). Солнечный инновационный
бытовой
водонагреватель.
Science
and
Education
,
2
(6), 320-324.
