Caldes_Outsourcing_book_temp.qxd 24/02/2010 10:39 Page 81
Socioeconomic Impact of Solar Thermal Electricity Deployment in Spain – A Brief Review
respect to the operation and maintenance costs (€12,300), an estimated number of people annually employed by the plant
exploitation time period of 25 years with an annual discount rate of amounted to 22. Both the gas and the electricity costs required to
2% was considered. Within fixed operation and maintenance costs
(€240,380), it was assumed that 80% of such costs account for the
Over the past few years, Spain’s
payment of employees’ wages (representing €1,033.60 per year),
while the rest accounts for administration services, insurance, etc.
solar thermal electricity
Consequently, and given that the average salary of a Spanish
deployment has been
employee working in the electricity generation and distribution
sector amounts to €46,300 per year,
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the estimated number of
remarkable, mainly due to its
people working at this plant would amount to 22 annually. Finally,
regulatory environment and
expenses associated with natural gas and electricity consumption
were also accounted for, and the estimation of the financing
favourable climatic conditions.
expenses has been computed considering a 12-year repayment loan
with a 7% interest rate. operate the solar plant were taken into account, and investment
costs were financed with a loan to be repaid over 12 years with an
For a solar tower power plant (17MW), of the total investment cost annual interest rate of 7%.
(€147,016 per year), it was assumed that solar field accounts for 43%,
power block 20%, tower and receptor 16%, storage system 6%, National Economy Data
construction 7% and engineering and contingencies costs for the When this study was conducted, the most up-to-date official Spanish I–O
remaining 8%. With regard to its operation and maintenance costs table was used. This I–O table from 2000 was published by the National
(€7,154), it was assumed that the operational period lasted for 25 Statistics Institute in 2007 and reflects all transactions that took place
years with a 2% annual discount rate. across all economic sectors in the form of increased demands as well as
intermediate and final production across 73 national economic sectors.
As in the previous plant, within the fixed operation and maintenance Based on this original I–O table, a reduced table including the 22 most
costs (€139,811), it was assumed that 80% of such costs relevant economic sectors for this analysis was constructed. Finally, total
represented the wages of employees and the rest accounted for costs associated with the studied plants had to be broken down and
administrative services, insurances, etc. As in the previous case, the associated with the different sectors of the reduced I–O table.
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