By Eduard W. Justi (auth.)

This publication matters one of many extra continual of the information which have been mentioned in journals dedicated to strength technology over the last few years. It bargains with the idea that hydrogen might be the medium of strength and the solar may be the resource (and, in the meanwhile, probably additionally coal, biomass, or nuclear fuel). the interpretation has been conducted by way of Dr. W. Schuh and Mrs. okay. Claus in collaboration with me. yes problems faced us at an early level, and our solution of them calls for a few clarification. First, the chapters that we got from the unique German authors have been written at various instances through the Eighties. a few years later, for the expected ebook within the usa, approximately half the chapters have been thoroughly rewritten. the interpretation used to be performed in 1984-1986. moment, the unique quantity is a German booklet. many of the examples in it discuss with the Federal Republic of Germany, even if a few expand to Europe in general.

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It is also due to the remorseless cutting down of the large tropical rain forests in Africa and South America, so that their ability to store CO 2 in green plants, in wood, and in humus is being lost. The resultant increasing amounts of CO 2 in the atmosphere tend to absorb infrared radiation from the sun, which increases the greenhouse effect in the atmosphere and will raise its temperature by several degrees. Thus, we are threatened by worldwide and catastrophic changes of climate. The United States Government has set up a commission aimed at averting increases in atmospheric CO2 • It is little consolation that destruction of the ozone layer, at a height of about 50 km above sea level, through nitrogen oxide exhausts of cars and planes, and freon from spray cans, all give rise to possible worse threats, because it is the ozone layer alone that holds back the solar UV radiation that otherwise can cause cancer and, eventually, kill all organic life.

Thus, only a fraction of the incoming solar energy is converted to electricity and the rest is converted to heat, so that solar cells rapidly increase in temperature unless they are cooled with water. 19). Thus, the most suitable sites for large solar power plants are not arid zones, but seashore sites, where both abundant sunshine and water for cooling are available. A good example is the Mediterranean coast. 8 Consequently, there will have to be very considerable distances between atomic and solar power plants and the centers of energy consumption; indeed, it is reasonable to expect that the energy will have to be transported over distances THE HYDROGEN ECONOMY 31 of up to 2000 km.

19). Thus, the most suitable sites for large solar power plants are not arid zones, but seashore sites, where both abundant sunshine and water for cooling are available. A good example is the Mediterranean coast. 8 Consequently, there will have to be very considerable distances between atomic and solar power plants and the centers of energy consumption; indeed, it is reasonable to expect that the energy will have to be transported over distances THE HYDROGEN ECONOMY 31 of up to 2000 km. The transport of electrical energy over such large distances is well known to be associated with considerable losses of energy (see also Chapter 9) and is therefore uneconomical.

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