Energy sources geothermal

The comparison between the two major seawater desalting alternatives, reverse osmosis and distillation, is more complex then ever. The location, system size, time of implementation and economic parameters, especially the price of conventional energy and also the possibility of use of non-conventional energy in the future, such as solar or geothermal energy sources, may greatly affect the final decision. 

At a geothermal energy source, dry steam at 700 kPa and 170°C is available at a mass flow rate of lOOkg/sec. A barometric condenser at lOkPa is used to decrease the turbine exhaust temperature. Find (a) the power produced by the geothermal power plant as shown in Fig. 2.22a. (b) What is the power produced without the barometric condenser ... 

At a geothermal energy source, a mixture of 80% steam and 20% water at 140°C is available at a mass flow rate of Ikg/sec. A barometric condenser... 

Magma -geothermal energy source [GEOTHERMAL ENERGY] (Vol 12)... 

Fig. 1 A geothermal energy source. (View this art in color at www.dekker.com.)...

Hydropower is obtained by allowing water to fall through a turbine to turn a shaft. Hydropower and geothermal energy sources have a number of characteristics in common. Both require facilities located in a suitable geological setting. Both are flexible in output capability and can be turned up and down or off and on with little difficulty. For hydropower, optimum sites are usually in mountainous country. These sites are difficult to develop and often far from the main energy market. 

Today s energy demand (Figure 1-1) is met largely by fossil fuels, such as oil, gas, and coal. Only 18% of primary energy sources were renewable in 2003, of which 16% was hydropower. The remaining portion comes from combustible and renewable waste with only a minor contribution from solar, wind, and geothermal energy sources. 

R. DiPippo, Geothermal Energy as a Source of Electricity, U.S. Department of Energy, Washington, D.C., 1980. 

Direct geothermal energy is used for space heating of homes, greenhouses, livestock barns, and fish-farm ponds. As well, it is employed as a heat source in some industrial processes, such as paper production in New Zealand and diying diatomite in Iceland. Since the industrial applications usually require high-... 

The main advantage of geothermal energy is that it can be exploited easily and inexpensively in regions where it is abundantly available in hydrothermal resen/oirs, whether it is used for electricity production or for dircct-usc heat. Gcothcrmally produced electricity from dry-steam sources is vei y cheap, second only to... 

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