Fig. 7.
Power graph of solar power plant, microhydroelectric power plant and integrated energy
device as a function of time during the day.
As can be seen from the graph, the electricity was taken from the solar photovoltaic plant
because the electricity generated by the Archimedes screw turbine was required less during
the day. Solar radiation increased to a maximum of 3898.78 W from 08:00 to 13:00 and
decreased from 14:00 to 19:00. In the evening, when there was no sunlight, an Archimedes
screw turbine was used.
As a result of the introduction of a combined energy device at a family enterprise,
2,124,000 soums of electricity produced by the device were used for the enterprise’s own
needs during the year, the economic efficiency amounted to 12,599,000 soums.
The structural diagram of the developed combined power plant has an energy efficiency
of 14%.
When calculating the results of theoretical and experimental studies of a solar
photovoltaic installation using the coefficient of determination formula, the error was 3%.
When calculating the results of theoretical and experimental studies of microhydroelectric
power stations using the coefficient of determination formula, the error was 8%.
When calculating the results of theoretical and experimental studies of a combined energy
device using the coefficient of determination formula, the error was 4%.
The maximum power of the combined power device was 4700 W, and the power obtained
in experimental studies was 3796 W. The net power factor is determined using the following
formula.
𝜂 =
𝑃
𝑒𝑥𝑝
𝑃
𝑚𝑎𝑥
=
3796
4700
= 0.807
The efficiency of the combined power plant was 0.807 or 80.7%.
As a result of the introduction of a combined energy device at a family enterprise, over
the course of a year, the electricity generated by the device was used for the enterprise’s own
needs for 2 124 000 soums, and economic efficiency was achieved for 12 599 000 soums.
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