Agricultural
sector uses energy mainly in the form of electricity and diesel for its various
activities such as water pumping, threshing, processing etc. Currently there
are about 20 million agricultural pump sets in India which accounts for about 20%
of the total electricity consumption. Nearly 0.25 to .5 million pump sets
are added annually. Significant energy losses are associated with the
distribution of electricity to the agricultural pump sets. Poor selection,
installation, and operation of electrical pump also add to these losses. The
poor management of load demand by the local supply authorities compounds the
problem of poor power quality. To compensate for this, farmers have resorted to
the usage of over-sized and inefficient local made pump motors which can operate
under these conditions of power supply. Free or subsidized electricity to this
sector is also one of the reasons that these consumers do not care for energy
saving.
The
average operational efficiency of these pump sets has been found to be only 20
to 30%. As per the Planning Commission Annual Report on State Power Utilities
and Electricity Department, low or free electricity coupled with inefficiencies
in the sector resulted in a revenue loss of 45,000 Crore INR in the year
2011-12. This huge amount can be well utilized in some social development activities like setting up schools, hospitals, and other basic amenities which is badly needed in our country. Do you agree?
Proper and efficient use of equipments and resources can help in energy conservation. The
energy efficiency of agricultural pump sets and hence the sector can be
increased by:
1. Using star rated Energy Efficient
Pump Sets (EEPS). These pump sets have an efficiency of 40 to 45%.
2. Selecting a pump of the right
capacity as per the irrigation requirement. Improper selection of pump can lead
to large wastage of energy.
3. Matching the motor with
appropriately sized pumps.
4. Proper installation of the pump
system, including shaft alignment and coupling of motor-pump.
5. Using low friction rigid PVC
pipes, foot valves and non-return valves.
6. Avoiding the use of unnecessary
bends and too long pipes.
7. Periodically carrying out the
corrective measures such as lubrication, alignment, tuning of engines (for
diesel pumps) and replacement of worn out parts. Efficiency of worn out pumps
can drop by 10%.
8. Using drip irrigation for
specific crops like vegetable, fruits, flowers etc. Drip irrigation systems can
conserve up to 80% water and reduce the pumping requirement.
According
to some estimates, the potential for energy saving is highest in agricultural
sector although there is contradiction to this. The sector has a potential to
save nearly 28 billion units (billion kWh) which is more than 36% of the total
estimated energy saving potentials. Study also suggests that this sector offers
the minimum payback period and hence should be on the top of the priority list.
To
induce energy savings in agricultural sector, the Ministry of Power, Government
of India, has initiated Agriculture Demand Side Management (Ag DSM) program on
Public Private Partnership (PPP). The scheme
was initiated in 8 agriculture intensive states, viz. Maharashtra, Haryana,
Punjab, Rajasthan, Gujarat, Andhra Pradesh, Madhya Pradesh and Karnataka. In these
states the agriculture sector accounts for 70% of the total electricity
consumption.
In
one of the pilot projects carried in Maharashtra, nearly 2200 old and
inefficient pump sets were replaced by star rated EEPS on PPP mode. The outcome
of the project reflects that the average efficiency has improved from 22.19% to
39.6%. Now estimate how much times the average efficiency has increased?
Thus
creating awareness among agricultural consumers, carrying out different studies
related to improvement of energy efficiency, initiating and implementing the
DSM program in this sector, one can say that India is in pursuit of Energy
Efficiency in Agricultural sector.
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