Detail Project and Funding

IT – Solare Termodinamico con accumulo Solido

SOLTESS

Funded by: Ministero dell’Istruzione, Universit√† e Ricerca (MIUR)  
Calls: PON 2010
Start date: 2010-07-10  End date: 2013-07-09
Total Budget: EUR 7.827.498,50  INO share of the total budget: EUR 561.241,00
Scientific manager: Piero Salatino   and for INO is: Francini Franco

Organization/Institution/Company main assignee: Universit√† di Napoli “Federico II”

other Organization/Institution/Company involved:
Dip. Energia e Trasporti. CNR
Dip. Ingegneria Chimica. Univ di Napoli
Enel Ingegneria e Innovazione SpA
Magaldi Power SpA
Magardi Industrie

other INO’s people involved:
Farini Alessandro
Fontani Daniela
Greco Vincenzo
Jafrancesco David
Mercatelli Luca
Sani Elisa

Abstract: In this project, storage in solid media is proposed, with heat exchangers embedded in the medium or in fluidized beds,. Storage media are collocated in the solar radiation receivers, on the top of towers with limited landscape impact. The storage system in the receiver will be studied with different prototypes, aimed at improving characteristics such as cost, thermal conductivity, thermal capacity, easy construction, relatively arbitrary sizing of the storage. This will be addressed via different solutions, described in the list of activities and goals.
The basic element for the proposed plant is the Solar Generation Unit (UGS in the Italian acronym). Each UGS is composed of: a heliostat field for receiving and concentrating solar radiation, with the corresponding control system, a tower less than 25-30 m tall, a “cell” on the top of the tower. The cell contains the solid storage medium, which can be a carbonious material, where a tube heat exchanger is embedded. Total surface of mirrors depends on installation site and size of the storage, given the working temperature. Heating of storage material takes place thanks to an opening in the bottom part of the cell, which is the “receiver cavity”. A central thermal cycle for electric energy production will be connected to a proper number of UGSs: a “module” is the minimum number of UGSs to be used for electric energy generation with a centralized control system. A plant is composed of a number of modules.
For micro-plants, a dedicated thermal cycle per UGS is provided, to produce heat and electricity for different purposes (desalination, polygeneration). A modular multi-tower configuration allows to replicate the modules, with important economy of scale for industrial production. Multi-tower plants with small towers reduces the landscape impact of designed plants.
This project is aimed at building an innovative CSP plant, available in different configurations: large power plant, microplant, integrated with fossil-fueled plant. Versatility is a core strength of the proposed technology. Moreover, the use of materials which are not classified as toxic or dangerous allows to deploy the technology in Italy without the limitation to industrial areas, as for diathermic oil and molten salts. The most relevant expected feature is a high efficiency (estimated as 20%) in solar-to-electric conversion via proper mirrors and with competitive costs.

INO’s Experiments/Theoretical Study correlated:
Solar Collectors Laboratory