Water Wind energy

Energy source Coal Coal Gas Coal Gas Uranium Water Wind Biofuel Solar... 

For each wind energy system category, there is a particular approach of how to apply an electrolyzing hydrogen production unit. The most common application studied currently is the stand-alone wind energy system combined with an electrolyzer. The latter is connected in the place of the battery cluster. The electrolyzer unit can be either a PEM or an alkaline type where there is a constant feed with water. The produced hydrogen is usually stored in a tank at the output pressure of the electrolyzer or compressed at a higher... 

Hydrogen production from electrolysis of water powered from a wind energy system depends on the wind potential of the site that the plant is installed. Planning of these stations should be accompanied by an elaborate analysis of the wind regime of the area to have a substantiated view of the amount of hydrogen that will be produced. In wind energy systems that are already in operation, it is easier to make this assessment and to conclude about the size of the electrolysis and storage equipment. 

As is the case with wind energy, solar power has most traction in countries such as Germany, Spain, Cyprus and Japan, all of which offer incentives to improve the uptake of renewable energy sources as part of their implementation of a diversified energy policy. In Cyprus, more than 50 percent of hotels and 90 percent of homes have solar water heating.21 As Figure 10 illustrates, such policies enabled Japan to develop a healthy lead in this industry, producing nearly half of the PV cells manufactured. 

Wind velocities in winter markedly exceed the summer ones (Fig. 2d). Practically everywhere in the Aral region their mean monthly values exceed 3 ms reaching in some places even 5 ms and more, which makes these territories rather attractive in terms of small-scale wind energy development. Strong winds and loose soils -the consequence of the Aral desiccation - create a serious environmental problem as salt and sand drift from the exposed seabed in addition to transfer of chemicals that were once brought into the sea from the fields with river waters. Every year from coastal areas that were up to quite recently at the bottom of the Aral Sea the wind puts adrift more then 75,000 tons of sand and salts [5] and transports them hundreds of kilometers. This causes progressive soil salinization in the Aral Region. 

Wind power emits no air pollutants. It requires no water for cooling. However, wind power can be used only in areas that have reliable winds. When the winds die down, a backup system for producing electricity must also be available. At present, wind energy is sometimes more expensive than other energy sources. Cheaper wind turbines could change this. 

---