МЕЖДУНАРОДНАЯ НАУЧНО-ТЕХНИЧЕСКАЯ КОНФЕРЕНЦИЯ
АКТУАЛЬНЫЕ ПРОБЛЕМЫ ЦИФРОВИЗАЦИИ ЭЛЕКТРОМЕХАНИЧЕСКИХ И
ЭЛЕКТРОТЕХНОЛОГИЧЕСКИХ СИСТЕМ
163
volume of water into the hydraulic pressure pipeline while ensuring the required water
consumption schedule, is significantly influenced by the design and operational
parameters of the pump unit. By implementing organizational and technical measures to
adjust them accordingly and necessary changes to the characteristics of the hydraulic
equipment, it is possible to achieve some reduction in the electricity consumption for
water delivery to rational values, in addition to using methods of regulating the water
supply of the pump unit or other technical solutions associated with significant changes in
the established water lifting process technology. The introduction of such adjustments to
the values of design and operational corrections should be based on detailed studies of the
dependence of energy indicators on these quantities.
Each pump unit has suction and pressure pipelines through which the liquid is moved
to the main hydraulic pressure pipeline under the influence of the pressure developed by
the centrifugal pump. The pressure pipeline of the pump unit is usually divided into two
parts: communication (within the premises of the water pumping stations) and supply
(from the premises of the water pumping stations to the connection point to the main
hydraulic pressure pipeline). The design parameters of each of these pipelines affect the
energy performance of the pump unit due to the existing pressure losses. With the
characteristic pipeline pressure network (
TR
H
=
const
,
ТR
R
=
const)
and the defined
geometry of the centrifugal pump impellers (
d
i
=
const
) remaining unchanged, the
operating point position of the pumping unit in machine water lifting systems is
determined by the pump unit rotation frequency n and their total delivery
PU
Т
Q
N
Q
.
Therefore, under the given operating conditions of the pumping station, the
optimization of its operation modes based on the criterion of minimum specific power
consumption can be presented as the objective function depending on the pump unit
rotation frequency and the irrigation water flow rate. It is obvious that with the provision
of coordinated and proportionate regulation of the pump unit rotation frequency [1-5], the
minimum specific power consumption of the pumping station will be achieved at the
minimum cost for each of the jointly operating pump units.
The specific power consumption of a pump unit can be represented as:
2
1
1
2
1
3
6
3
3
5
4
2
4
5
3
6
2
1
Q
c
n
Q
b
n
а
Q
n
m
n
Q
m
n
Q
m
n
Q
m
n
m
m
Э
10
2
9
2
4
8
2
7
