نتایج جستجو برای: electricity supplies
تعداد نتایج: 73518 فیلتر نتایج به سال:
Flows in small size channels have been studied for a long time over multidisciplinary field such as chemistry, biology and medical through the various topics. Recently, the attempts of electricity generation from the small flows as a new area for energy harvesting in microfluidics have been reported. Here, we propose for the first time a new fluidic electricity generator (FEG) by modulating the...
Delivering water to consumers uses a lot of electricity. In the era limited fossil fuel resources, we are increasingly looking at possibilities using renewable energy sources power residential buildings or industries. The research aimed analyze potential producing electricity from photovoltaic panels, ensuring supplies for pumping water, and reducing costs. tests were carried out existing (PV) ...
GAO-04-844, ELECTRICITY MARKETS: Consumers Could Benefit from Demand Programs, but Challenges Remain
To view the full product, including the scope and methodology, click on the link above. The efficient and reliable functioning of the more than $200 billion electric industry is vital to the lives of all Americans. As demonstrated in the 2003 blackout in the Northeast and the 2001 energy crisis in the West, changes in the cost and availability of electricity can have significant impacts on cons...
In current conventional utility systems, fossil fuel or nuclear power plants must back up intermittent renewable electricity generators if the utility grid is to have acceptable reliability. For low levels of intermittent power, this can be achieved without difficulty or added expense. For high levels this reliance on other generators becomes explicit and increasingly expensive, and transmissio...
With the increasing reduction of fossil fuel supplies, it is predicted that world would run out energy resources within next few decades attributed to depletion fuels. Renewable sources generate electricity with minimal contribution CO2 or other greenhouse gases atmosphere. Solar, wind, hydroelectricity, and biomass are most common kinds sustainable sources, all them have enormous prospects hel...
A stand-alone system is defined as an autonomous system that supplies electricity without being connected to the electric grid. Hybrid systems combined renewable energy source, that are never depleted (such solar (photovoltaic (PV)), wind, hydroelectric, etc.) , With other sources of energy, like Diesel. If these hybrid systems are optimally designed, they can be more cost effective and reliabl...
OBJECTIVE To assess the resources for essential and emergency surgical care in the Gambia. METHODS The World Health Organization's Tool for Situation Analysis to Assess Emergency and Essential Surgical Care was distributed to health-care managers in facilities throughout the country. The survey was completed by 65 health facilities - one tertiary referral hospital, 7 district/general hospital...
OBJECTIVES To survey infrastructure characteristics, personnel, equipment and procedures of surgical, obstetric and anaesthesia care in 17 hospitals in Ghana. METHODS The assessment was completed by WHO country offices using the World Health Organization Tool for Situational Analysis to Assess Emergency and Essential Surgical Care, which surveyed infrastructure, human resources, types of surg...
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