'HIGH TEMPERATURE SIDE HEAT SOURCE AUXILIARY DEVICE' FOR REDUCING ELECTRIC POWER GENERATION COST OF OCEAN TEMPERATURE DIFFERENCE ELECTRIC POWER GENERATION

摘要

PROBLEM TO BE SOLVED: To reduce an electric power generation cost of OTEC.SOLUTION: An electric power generation cost can be reduced by increasing exergy and utilizing a property of a heat medium. When a sea level is used as a high temperature side heat source auxiliary device, a floating body type solar pond is provided and, when a land is used as the high temperature side heat source auxiliary device, a non-light condensing heat collection system is provided. In an electric power generation device, a Kalina cycle machine (using ammonia/water heat medium) is preferably used from a temperature zone of a heat source. In the case of an output of 1,000,000 kW, for example, when the high-performance Kalina cycle machine is used, an electric power generation cost is calculated to be 9.9 yen/kWh according to OTEC method, on the other hand, in the case of using the non-light condensing heat collection system, the electric power generation cost is calculated to be 4.7 yen/kWh, and in the case of using the floating body type solar pond, the electric power generation cost is calculated to be 4.4 yen/kWh (under conditions of Kume Island).SELECTED DRAWING: Figure 1