Tuesday 29 January 2013

Author(s): Ankur Paliwal, Alok Gupta

An unviable route

An unviable route

Draft of national solar mission’s second phase fails to learn from past mistakes

  • Excellent post. The solar

    Excellent post. The solar water pumping system uses solar energy to pump water. Parts ÔÇó Solar PV panel ÔÇó One of the following motor-pump sets compatible with the photovoltaic array: ÔÇó surface mounted centrifugal pump set, ÔÇó submersible pump set, ÔÇó floating pump set, ÔÇó Submersible pump set, ÔÇó Any other type of motor-pump set, after approval from MNRE ÔÇó Pipes Working of a solar water pumping system The system operates on power generated using solar PV (photovoltaic) system. The photovoltaic array converts the solar energy into electricity, which is used for running the motor pump set. The pumping system draws water from the open well, bore well, stream, pond, canal etc. The system requires a shadow-free area for installation of the Solar Panel Utility A system with 1800 watt PV array capacity and 2 HP pump can give a water discharge of 1.4 lakh litres per day from a depth of 6 to 7 meters. This quantity of water is considered adequate for irrigating about 5-8 acres of land holding for several crops. Approximate Cost Total cost of the system - Rs. 4,50,000/- GOI subsidy through MNRE - Rs. 1,80,000/- Advantages ÔÇó No fuel cost - as it uses available free sun light ÔÇó No electricity required ÔÇó Long operating life ÔÇó Highly reliable and durable ÔÇó Easy to operate and maintain The 3HP solar power surface pump would cost Rs 4.25 lakh while the 3HP submersible solar pump with a maximum 75-metre head would cost around Rs 4.85 lakh. " Earlier the same pump cost around Rs 5.70 lakh. However, prices have come down due to competition. Under the scheme farmers will get 86% subsidy on the cost of the pump, only having to pay the remaining 14%. Solar pumps sets are attached to the water source. The pump's solar panel converts the solar energy into electrical power, which runs the motor to pump water. Apart from small and Medium Farmers constraints even to meet the money after Government subsidy, the main drawback is reliability of the Solar Pumps. Solar Pumps work efficiently in the case of Open Wells. India has about 15 million grid-powered pump-sets and close to 7 million diesel-powered pumps. However, only about 7500 solar pumping systems have been installed for agricultural use in India. The problems with the grid-powered pumping systems are: ÔÇó Demand for electrical energy far outstrips supply, and the gap continues to widen ÔÇó It is proving increasingly difficult for the government to continue subsidizing the rising costs of generation, transmission and distribution losses, pilferage, etc (to deliver 3600 kWh to a farmer to pump water, 7000 kWh is required to be generated, assuming a diversity factor 2). The loss of revenue to the government is colossal. ÔÇó The costs and tariffs of electricity continue to rise ÔÇô the marginal farmer is unable to pay for the electricity) ÔÇó Grid power is unreliable and of poor quality, often leading to motor burnouts at the tail end. ÔÇó In a coal-fired thermal generating station, 1 kWh of electrical energy generated translates to 11.2 tonnes of carbon dioxide emission a year. The power tariff for Agriculture is free in some cases and minimal in other cases. Many of the Irrigation motors are outdated as such inefficient. A scheme can be chalked out by State Governments to replace the 4existing inefficient irrigation pump sets with modern ones by giving subsidy. This way enormous power can be saved. Electricity is a high grade energy which finds use in industry,lighting,computers etc. Dr.A.Jagadeesh Nellore(AP),India E-mail: Anumakonda.jagadeesh@gmail.com

    Posted by: Anonymous | 3 years ago | Reply
  • The introduction of solar

    The introduction of solar pumpsets for irrigation wells,tublewells and borewells is alternative energy to save farmer tosave climate and to increase farming .The cost of solar system 3hp 4.5 lakshs. The middle class farmers not come forward.The subsidy part only 30 percent. In Rajathan govt Horticulture dept have give 87percent subsidy. This very encouraging to farmers to go far solar.The same policy why not extend at national level. I request the lobbing with Finance Minister Govty of India and Energy Minister need urgently.In future Power shortage increases and irrigation decreases. production of food shortage willbe happend.Alternatively to promote this solar energy only to increse food production .vgreddy resident RRDS Nellore Andhra Pradesh, rrds111@gmail.com

    Posted by: Anonymous | 3 years ago | Reply
  • Solar systems are the great

    Solar systems are the great source of using one form of energy and converting it into another useful form. I would better love to use it for my home. Amazing post.

    Posted by: Anonymous | 3 years ago | Reply
  • Solar Powered Water Pump

    Solar Powered Water Pump system to lift water from 650 feet deep from th ground level to about 50 feet above the ground level. Required two sets.

    Posted by: Anonymous | 10 months ago | Reply
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