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2017年2月27日星期一
2017年2月24日星期五
Solar energy powers pump system for irrigation solutions.
A farmer in Myanmar waters his crop with the help of a solar water pump |
Every mouthful of food eaten by virtually every creature on Earth depends ultimately on the sun. But it can do much more than nurture the crops that feed us − and humans are starting to exploit this potential in striking new ways.
Farmers are now using solar energy to do far more than simply enable their crops to grow. Already it’s helping them to irrigate their fields and to clean their dairy equipment.
Only about 5 per cent of Africa’s cultivated land is irrigated, compared with Asia’s 41 per cent. Until recently, the other available methods have been manual irrigation, which is time-consuming and laborious, or petrol or diesel pumps, which are too expensive for many farmers and also add to greenhouse gas emissions.
But now there’s another way – solar-powered irrigation pumps. One pioneer of this technology is MNE Technology, based in China,manufacturing solar water pump system.
The pump’s solar panel directly converts solar energy into electrical power, which is transferred to a simple motor that rotates a flywheel, whose turning moves a piston up and down to draw water through the pump cylinder.
The pump, which can produce enough water to irrigate about half an acre of land per hour, works on sunny and cloudy days, in the early morning and late into the evening – and is easily transportable.
The solar panels provide the pump’s power directly without the need for batteries.Water is pumped into a raised storage tank by day, and all the farmer needs to do in the evening is to open a valve on the tank so that the water flows down through a filtration system and onto crop root zones via drip irrigation tape.
More info: Solar energy powers pump system for irrigation solutions.
2017年2月13日星期一
India Madhya Pradesh Auctions Nation Lowest-priced Solar
India Madhya Pradesh Auctions Nation Lowest-priced Solar |
An auction in the India state of Madhya Pradesh has today set a new record low for solar power in the country.
The Rewa ultra-mega solar park, a 750 MW joint venture between Solar Energy Corp of India (SECI) Madhya Pradesh Urja Vikas Ltd., has attracted bids of INR 3.59/kWh ($0.053/kWh) – the lowest ever recorded in India.
Bidding rules outlined by the developers deemed that the lowest tariff accepted would serve as a base price for the reverse auction. The developers that submitted the highest proposed tariff would be excluded from the e-auction. This unique set of rules has helped to drive the cost below the previous Indian record-low of INR 4.34/kWh, set last year in Rajasthan.
The Rewa solar capacity is being doled out in three, 250 MW units – the first of which is set at a price of INR 3.59/kWh, rising to INR 3.61/kWh for the second unit, INR 3.26/kWh for the third.
There were 20 developer proposals submitted in the e-auction, this number was whittled down to 18 following the exclusion of Shapporji Pallonji Torrent Power – both of who offered the two highest prices.
“The auction will begin at the country’s lowest solar power rate it is likely to go further down,” said India’s principal secretary of new renewable energy, Manu Shrivastav. The completed Rewa solar park will not only be India’s cheapest such installation, but its largest too, usurping Tamil Nadu’s 648 MW solar farm.
A portion of the energy produced onsite at the 750 MW, 1,500 hectare plot will be purchased by Delhi Metro Rail, with Madhya Pradesh utilities committed to buying the rest of the power produced.
2017年2月6日星期一
Solar Powered Irrigation System:A Solution to Water Management in Agriculture
The use of solar energy in irrigation can be beneficial to farmers in very rural areas and developing countries. |
Farmers have always played a significant role in our society as they provide the world’s population with food. However, one may forget that, not only do they provide food but they also provide energy, which nowadays, is of paramount importance, especially as in light of renewable energies. Indeed, farmers can produce energy from the wind, the sun or the biomass and they can use it for their own farm, or, if they have a surplus, resell it to companies.
Solar energy might be one of the easiest ways for farmers to produce energy. Indeed, farmers usually have several large buildings whose roofs are directly under the sun, without being hindered by the shadows of the trees, turning them into an ideal place to settle a photovoltaic system. Therefore, the use of solar energy in agriculture is becoming increasingly popular and the energy produced from this renewable source can be used either on the farm or in the local power grid, providing the farmer with an additional income.
One of the areas in agriculture that benefits the most from solar energy is irrigation, especially in arid regions. The main reason is that using the sun for irrigation represents a virtuous circle: when the sun shines, it feeds the irrigation system, well, we know that crops needs more water when the sun shines a lot. Therefore, a large quantity of energy is available when it is actually needed.
How does a solar irrigation system work?
Solar energy use in agriculture is becoming increasingly popular |
The pumps used for the transport of the water are equipped with solar cells. The solar energy absorbed by the cells is then converted into electrical energy via a generator which then feeds an electric motor driving the pump. Most of the traditional pump systems mainly work with a diesel engine or with the local power grid. However, these two modes of operations present disadvantages compared to solar pumps.
In many rural areas, especially in developing and emerging countries, the access to the electricity grid is not always guaranteed. In this case, farmers cannot rely on the traditional irrigation system. Thus, using an independent and alternative energy system can be a solution for the farmer to secure a safe power source and for the public grid to avoid saturation.
Diesel pumps are slightly more efficient than AC powered pumps as they allow greater flexibility. However, one of the main constraints is that this system relies on the fuel availability, added to a greater impact on the environment. Diesel-driven pumps are cheaper than solar-powered pumps but the operating costs are quite high and depend heavily on the diesel price. In solar-powered systems, it works the other way round, that is, although this system is relatively expensive, the source of energy is free, therefore, after the amortization period, there are no longer operating costs (only the maintenance costs must be considered). Therefore, solar pumps turn out to be a viable long term investment.
As several studies have shown the access to water for agricultural purposes remains critical in some areas such as in arid regions of Africa and Southern Asia. Many Indian and African farmers fetch the water directly from the well or the rivers and irrigate their fields using buckets. If farmers of those regions could have access to a motorized pump, they would increase their yield by 300%.
Where is solar irrigation happening?
A drip irrigation system |
The installation of solar pumps in arid regions such as in Africa, Asia and South America is also part of many development projects, aiming at increasing local farmers productivity and as a consequence, improving their living conditions. One of the successful example of this is the initiative of a Physics teacher in a school in Blankenese (Germany) where students have developed two solar-powered pumping systems in cooperation with the company SET GmbH from Wedel. They installed these systems in two farms in Nicaragua to pump underground water. This project could also be achieved with the collaboration of the UNAN University in León, which deals a lot with the exploitation of solar energy. Indeed, the project has been running for over 10 years and 30 pumps are in operation now in Nicaragua. It is supervised by the Nicaraguan company Enicalsa that helps farmers benefit from solar irrigation. The use of solar pumps allows the latter to produce all year round, even in dry season and thus to increase their income and strengthen their position in the local market.
Aside from the regions previously mentioned, there is also an increasing interest in solar irrigation systems in Europe. Just a few months ago, a mobile solar drip irrigation system from Austria has reached the production stage. The Austrian company Wien Energie carried out this project which pursues a dual objective: on the one hand, reduction of CO2 emissions owing to the use of solar energy, on the other hand, achievement of 30% water savings thanks to the drip irrigation method versus the traditional sprinkler irrigation.
The principle of the drip irrigation method is quite simple. With the use of various valves, hoses and pipes, water drips slowly and at regular intervals to the roots of the plants. Therefore, there is no water waste as water goes directly where it should go, contrary to a sprinkler system in which water evaporates into the air or seeps into soils where no plants grow. Therefore, drip irrigation method enables to grow more crops with less water, turning it into a highly efficient irrigation method.
Therefore, in countries which suffer from high temperatures and scarce water resources, the drip irrigation system could contribute to an efficient water management. This is all the more important as farmers have to face three challenges: save water, money and energy. Mobile solar drip irrigation systems shall turn out to be the perfect answer to face these challenges. Although these systems are still quite expensive and complicated to settle, many R&D projects are working on the democratization of the use of solar power in agriculture, which, in the future (and even now), could play a vital part in the management of the food and energy crisis.
2017年1月21日星期六
15KW Solar Powered Water Pumping System in Hainan
System Power:15KW
Location:Hainan,China
15KW Solar Powered Water Pumping System in Hainan |
15KW Solar Powered Water Pumping System in Hainan |
More info:15KW Solar Powered Water Pumping System in Hainan
2017年1月20日星期五
Solar Powered Water Pump System Life into Yemeni Farms
Solar Powered Water Pump System Life into Yemeni Farms |
Thanks to Solar powered Pumps for agricultural Irrigation
Thanks to solar power pumps, production at this farm in Wadi Dawan and several other farms in Yemen’s province of Hadramout has not stopped despite suffering from massive diesel shortage due to the ongoing war in the country.
The farm, located in the eastern gate of Wadi Dawan along an arid stream, is known for two reasons: its premium honey and being the ancestral home of Osama Bin Laden’s father.
When he first began working here, Abdul Rahman Al Sakuti remembers how he used to spend countless hours irrigating the farm.
“I used to spend the early hours of the day on diesel pumps; fill in fuel, and start them manually. When the machines broke down, we used to wait for hours or days for engineers to repair them,” Al Sakuti
During the latest cycle of violence in the poverty-stricken country where diesel became scarce, farmers had either to buy fuel at exorbitant prices from the black market or halt farm production altogether.
But Al Sakuti took advantage of large cash incentives given by the government a few years ago to encourage farmers to invest in solar power pumps in order to curb reliance on diesel.
The Solar Energy Pump System Has Made Lives of The Farmers Much Easier.
“Now, when the sun shines, the pumps automatically switch on and the water flows into the farm. We do not even bother to look at them,” Al Sakuti said.
Now, Hadramout’s long agricultural valley is strewn with solar panels as far as the eye can see.
Farmers here say that the solar power has boosted production as there is plenty of water and farmers are able to spend more time on the crops.
“The solar power water pumps have definitely boosted crop production. We are able to irrigate them daily.
Government Aims at Helping Farmer Arcoss Yemen to Covert to Green Energy
Aimed at helping farmers across Yemen to covert to the green energy, the government kicked off a programme in 2014 to subsidise solar power pumps and panels.
Through a local state-run bank, the government would pay 25 per cent of the price of the solar system if the farm’s owner would pay the total cost upfront.
Landlords who could not afford the upfront payment were able to take an interest-free loan and the government would slash 10 per cent for those who could pay it back in two years and five per cent if they could pay it back in three years.
Omar Saeed Bin Frijan, an engineer who runs a solar power company called Al Wadi, told that many people took advantage of the government incentive in order to ditch costly diesel pumps.
“During the early months of programme, we used to install five pumps monthly as demand was very high,” he said.
But many others hesitated to apply for the government loan due to the high initial cost of the system.
The cost of installing a 15kw solar-powered pump in August 2014 cost $28,000.
But the farmers who acted on time have saved thousands of dollars as they dodged high diesel and oil prices and maintenance costs.
But, only a few months after approving the programme it was suspended as Yemen erupted into civil war.
To the disappointment of many farmers, the government called off the incentive programme when the war broke out early 2015.
Many unlucky farmers who did not have the solar panels yet were forced to shut down operations.
Al Sakuti said that his landlord used the money they saved from diesel and repairs to buy more solar power pumps.
Since it began operations in June 2013, Frijan’s company has installed 58 solar power systems in different places in Hadramout.
Not only are they useful for farmers, but they are also used to pump drinking water for residents.
But, the number of solar power systems is relatively low compared to the hundreds of diesel-generated pumps throughout Yemen.
“While people knew that it was a smart investment and operational costs would be zero, most could not afford to buy them,” Frijan said.
“The government should revive the programme,” he added.
Despite the host of benefits of using the renewable energy system, some critics say that if farmers excessively pump water to irrigate their farmland, then the country’s underground reservoirs would be in danger of depletion.
“The farmers are not up to date on how to use modern irrigation systems,” Salem Buraji, the director of ministry of agriculture in Hadramout’s Wadi Dawan
“They still use mud furrow instead of plastic pip
More info :Solar Powered Water Pump System Life into Yemeni Farms
More info :Solar Powered Water Pump System Life into Yemeni Farms
2017年1月17日星期二
10 Reasons to Install a Solar Powered Well Pump System
10 Reasons to Install a Solar Powered Well Pump System |
Have you ever thought about installing a solar power well pump? Do you have a rural or isolated location where you need to pump water either from the surface or from hundreds of feet underground? If so, a solar power well pump is the perfect solution.
Technology developments in both pumps and solar power have made this possible. Both solar panels and solar pumps have made advances which make them capable handling a wide range of water pumping needs. Many of these systems did not exist just a few years ago.
Below are the top 10 reasons to install a solar well pump. If you have never thought about installing a solar power system before, browse through the list and see if you can think of any uses. It is surprising, when remote low cost water pumping options are made available, ideas and uses pop into mind! Don't delay, find an install a system today.
Pump water anywhere on earth. No external power required
The problem with pumping water in rural locations is the need to run electricity to the site. For many years wind power and windmills were used in these secluded locations. Windmills are expensive and hard to maintain. There are better options today.
The breakthrough in solar water pumping is that there is no need for an external power source. The sun and the solar panels provide all of the electricity needed to pump water from hundreds of feet underground.
Solar well pumps are more efficient and more powerful than ever before
Solar power pumps of today are not like the novelty solar fountain pumps of the past. These are high power, efficient, commercial products. Top of the line solar well pumps are made of stainless steel and feature brushless DC motors.
Stainless steel is used for the pump housing and pumping mechanism for proper sanitation and to ensure a long life. The stainless steel will resist corrosion even when suspended in water for years. The stainless pumping mechanisms minimizes wear due to sand and other particles, while lifting water from deep underground.
The brushless DC motors are some of the most efficient on the market. Since they are brushless, there is never a need to remove them from the well to change the brushes. These motors are rated for tens of thousands of hours of operation without maintenance.
Systems are low cost and readily available
Solar power systems of the past had high price tags attached, in the tens of thousands of dollars. Advances in technology have made low cost systems possible and readily available. One of the main advances making this possible are solar cells and panels. Solar cell manufacturing has progressed to the point where it is very affordable. A system that previously cost tens of thousands of dollars is now in the low thousands. A 10X decrease!
A basic, but complete well pump system will cost about $2000. This baseline system will pump water from a few hundred feet deep, at a few gallons per minute flow rate. This basic system will replace most windmills, matching both depth and flow rate. They will keep a large pond full of water with no operating cost or pump enough water for a few hundred head of cattle.
Higher performance systems increase in cost to about three to four thousand dollars as more depth and flow rate are required. These systems are suitable to provide water to entire households or hundreds of head of livestock. They can replace your standard household well pump. The slight cost increase in these systems due to the higher performance, but remember these are complete systems, solar panels (a large cost) included.
Specialized systems can cost in the low tens of thousands of dollars. These are high performance systems pumping many gallons of water per second, sufficient for a complete farm or even remote village. They are overkill for most livestock and household needs. They are more suitable for large farming operations and crop irrigation.
No ongoing operating costs
After the initial system cost, which is often comparable to other well options, there are no ongoing operating costs. Normal wells burn money every time they turn on to pump water. This is not the case for solar well pumps, which get their power from the sun.
Every single day the sun is shining you are earning free money from the sun. What better deal exists? The sun shines down and water is pumped up from deep underground, saving you from overpriced electricity charges.
Much cheaper than installing main power to remote locations
Trenching main power to a remote location is costly in both time and money. This is one reason windmills of the past were so popular, since they required no electricity to operate. The "windmills of today" are solar power systems capable of pumping water without connecting to main power. You are no longer limited to how long of a power cable can be trenched into the ground or how hard the wind blows.
Complete systems can be shipped right to your door
Complete systems can be shipped right to your door in only a matter of days. It only takes two boxes, one for the pump/controller and one for the solar panels, to ship directly to your house or office. Many standard systems can be shipped by normal shipping methods (USPS, UPS, FedEx) without the need for freight shipping. This allows for shipping systems to all locations and all residences.
Systems are modular and can be upgraded over time
The components that make up solar power well pump systems are very modular. They can be swapped out and upgraded as needed. If more overcast performance is needed, extra solar panels can be added. If more water is needed per day, batteries and extra panels can be added, so water can be pumped during the night. If more volume is needed, the pump can easily be replaced to a higher power model offering higher flow.
Solar well pumps are easy to maintain
There are very few mechanical components. Solar panels are highly reliable and do not require any maintenance besides a quick wash every year or two. Brushless motors do not have brushes (hence the name) and therefore require no maintenance. The pumping mechanisms are highly reliable and are easy to replace in the field. A system should be able to pump tens of thousands of gallons without any maintenance.
Cheap to maintain
There are two items in solar well pump systems which may need occasional maintained, both of which are very low cost. Occasionally, every year to two, the solar panels should be washed off to ensure maximum performance. Less often, about every 5 years, it is good to replace the pumping mechanisms which can degrade over time reducing performance. These mechanism cost about $20 dollars and can be replaced it the field.
Systems can be self-installed in a single weekend
Solar power well pumps systems are very simple and can be installed in a single weekend. All of the solar panel connections are made with waterproof connectors, no soldering required. The solar pump, solar panels, and sensors all connect to the controller using screw terminals, again no soldering required. The pump should connect easily to existing power cables and plumbing. Just lower it down into the well and assuming you finish installation before night, water will start flowing!
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