Simulation Study and Economic Analysis of Large-Scale Solar Heating Plants in Spain (original) (raw)
2010, Proceedings of the EuroSun 2010 Conference
When the focus of solar thermal systems remains solely for domestic hot water (DHW) production, as it is the case of Spanish regulation, then the contribution of solar thermal energy to raise the share of renewable energy in the EU's energy mix to 20% by 2020 will be very limited. In this paper the experience gained in Europe with Central Solar Heating Plants combined with Seasonal Storage (CSHPSS) systems has been transferred to the Spanish situation, in order to establish the conditions and criteria for installing these systems in the mid-term. A simulation study on solar assisted district heating systems with high solar fractions was carried out taking into consideration the meteorological conditions and heat demands in the residential sector for different cities in Spain and various values of heat loads from 500 to 5000 MWh/year. Results have shown that: i) design criteria for Spain are different, less solar collector area is necessary with a greater ratio between storage volume and collector area, ii) specific total heat cost mainly depend on the size of the system; and iii) specific solar heat cost and solar fraction significantly vary with the heat demand and solar radiation corresponding to the geographical location of the system.
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