Table 11.16 Examples of Satellite Repleacement Cost for Viable Operation, 3% _______________________Return on Invested Capital______________________ The main assumption associated with the scenarios presented in this analysis are : 1. 30 year satellite lifetime. 2. Power delivery will average 23 hours per day and all energy is sold. 3. Energy selling price is based on current estimates of $0.05 per kWh. For our three larger scale steps of the ISPO operation we see that the satellite replacement costs for continuous operations must not exceed: ________________ Table 11.17 Satellite Replacement Costs________________ These figures clearly show that for the one and 500MW systems operation will not be a profitable venture. Figure 11.6 shows the viability of space solar power satellite operation based on $0.05 per kWh revenues. The assumptions used in this analysis are the same as above. The figure shows that if the cost of satellite replacement falls into the shaded area then the power supply venture will be viable. The curve will move up with the increase in the cost of energy. Using this model it is possible to calculate the price at which energy must be sold to obtain a profitable venture, based on the replacement cost of each satellite.
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