By C Julian Chen
"This e-book covers the elemental physics of the main considerable strength source on hand to human society--solar power. just like different applied sciences, step one to reaching luck is to have a company realizing of the elemental technological know-how of solar power and its use. the subject material of this article is designed to provide the reader this stable footing, in an effort to be the root of study and the advance of new sun engineering applied sciences. Homework difficulties and routines to augment the contents besides a strategies guide for teachers. "--Provided through publisher. Read more...
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Additional resources for Physics of solar energy
The temperature is typically some 10◦ C oﬀ that of the surface. The major application of shallow geothermal energy is to enhance the eﬃciency of the electrical heater and cooler (air conditioner) by using a vapor compression heat pump or refrigerator. Deep geothermal energy is the heat stored in the core and mantel of Earth. The temperature could be hundreds of degrees Celsius. It can be used for generating electricity and large-scale space heating. In this section, we will concentrate on shallow geothermal energy.
See Appendix A. S. 87 quad, almost exactly 100 EJ. Therefore, the energy value in exajoules is almost exactly its percentage. 07% of total energy consumption in 2006. fuel continues, the entire fossil energy reserve will be depleted in about 100 years. 2. 3 shows the percentage of diﬀerent types of energy in the United States in 2006. 07% of total energy consumption. However, globally, solar photovoltaic energy is the fastest growing energy resource. 4, solar photovoltaics will someday become the dominant source of energy.
Wind velocity before the turbine rotor is v1 , and wind velocity after the turbine rotor is v2 . The velocity at the rotor is the average velocity, and the power generated by the rotor is related to the diﬀerence in kinetic energy. ✐ ✐ ✐ ✐ ✐ ✐ “ChenSolarEnergy” — 2011/5/17 — 17:56 — page 12 — #39 ✐ 12 ✐ Introduction Combining Eqs. 22) P = ρA(v1 + v2 ) v12 − v22 . 4 Rearranging Eq. 22, we can deﬁne the fraction C of wind power picked up by the rotor, or the rotor eﬃciency, as P = 1 3 ρv A 2 1 1 2 1+ v2 v1 1− v22 v12 1 2 1+ v2 v1 1− v22 v12 = P0 C.