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By Jacques Constans (Auth.)

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Parts this of the concept system appears (heat to be exchangers, extremely promising since its influence on the environment is relatively small and t h e possibilities for integrating a range of industrial operations are g r e a t . 35 MARINE SOURCES OF ENERGY 36 FAVORABLE SITES For energy determining conversion criteria for formation thermal (OTEC) efficient with ocean difference reasonable of sites for an ocean thermal p l a n t , it i s n e c e s s a r y to know t h e plant operation data.

On the other h a n d , the possibility of prefabricating complete u n i t s at a yard will lower the cost for assembly and erection. Also, the cost for land acquisition can be omitted. t h e most important advantage of offshore However, installation is the b e t t e r wind conditions that normally exist off the coast. percent increase A 15 in wind velocity is equal to a 52 percent increase in power o u t p u t . If the cost for extracting t n ' s wind onshore only increases by 30 p e r c e n t this leaves 22 percent to pay for the offshore case, but costs.

Centripetal 11. 11. The blade profile is of parabolic form for H acceleration: Νγ = rw /g>>l. = 1. 12. Corresponding calculations are not v e r y 12. complicated. Calculation of useful effect, design of control mechanism for transmission other parts varying of forces of rotational between the rotor speed, blades are and very complicated. 13. HA r o t o r s have a lower s t a r t moment. 13. VA rotors have a higher start moment because of stalling at lower U R / V . 1. 14. (Continued) The blade element C(r) x d r moves in a The stream more complicated.

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