30
S. B. Bopche
PV Panels
(I dc , V dc )
DC
Motor
Pump
Fig. 3.3 Directly coupled DC motor based Solar-irrigation-system. Adapted from Islam et al.
(2017)
A Photovoltaic array system is used to energize motors of the irrigation pumps.
In order to transform variable magnitude DC voltage into a constant magnitude AC
or DC power electronic inverter circuit is generally used, before energizing AC or
DC motors. For solar irrigation system dynamic as well as displacement type pumps
are preferred. The displacement type pumps are reported to be more efficient than
the dynamic type. The performance of dynamic pump is solar insolation dependent.
The additional unutilized energy obtained from solar irrigation systems can be used
for providing energy/work for rice-parboiling-systems (Islam et al. 2017).
The schematic diagram of directly coupled solar-irrigation-system is as depicted
in Fig. 3.3.
Irrigation using Solar based Thermal Systems: Thermal energy can be obtained
from the Sun with the help of a solar-concentrating surface. It can be transferred to
the working fluid, which directly or indirectly executes Rankine, Brayton or Stirling
cycle engines. Mechanical work is obtained from these heat engines used to drive
the generator in order to drive the motors for energizing various household and
agricultural appliances. This solar thermal technology can also be used to drive the
pumps for irrigation purposes, which has not been researched extensively in last
10–15 years. A schematic showing, solar driven irrigation pump run by Stirling
engine is as depicted in Fig. 3.4 (Wazed et al. 2018).
Concentrating
collector cum
receiver
Stirling engine
operated
pumping
system
Hot end
reservoir
Cold end
reservoir
Water Suction
Water delivery
Fig. 3.4 Schematic of solar driven stirling engine. Adapted from Wazed et al. (2018)
S. B. Bopche
PV Panels
(I dc , V dc )
DC
Motor
Pump
Fig. 3.3 Directly coupled DC motor based Solar-irrigation-system. Adapted from Islam et al.
(2017)
A Photovoltaic array system is used to energize motors of the irrigation pumps.
In order to transform variable magnitude DC voltage into a constant magnitude AC
or DC power electronic inverter circuit is generally used, before energizing AC or
DC motors. For solar irrigation system dynamic as well as displacement type pumps
are preferred. The displacement type pumps are reported to be more efficient than
the dynamic type. The performance of dynamic pump is solar insolation dependent.
The additional unutilized energy obtained from solar irrigation systems can be used
for providing energy/work for rice-parboiling-systems (Islam et al. 2017).
The schematic diagram of directly coupled solar-irrigation-system is as depicted
in Fig. 3.3.
Irrigation using Solar based Thermal Systems: Thermal energy can be obtained
from the Sun with the help of a solar-concentrating surface. It can be transferred to
the working fluid, which directly or indirectly executes Rankine, Brayton or Stirling
cycle engines. Mechanical work is obtained from these heat engines used to drive
the generator in order to drive the motors for energizing various household and
agricultural appliances. This solar thermal technology can also be used to drive the
pumps for irrigation purposes, which has not been researched extensively in last
10–15 years. A schematic showing, solar driven irrigation pump run by Stirling
engine is as depicted in Fig. 3.4 (Wazed et al. 2018).
Concentrating
collector cum
receiver
Stirling engine
operated
pumping
system
Hot end
reservoir
Cold end
reservoir
Water Suction
Water delivery
Fig. 3.4 Schematic of solar driven stirling engine. Adapted from Wazed et al. (2018)