Ettore Morosini

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• Doctor of Engineering
• PostDoctoral Researcher at Politecnico di Milano

Long duration energy storage systems with 8-12 hours of capacity are one of the best options to reduce the increasing curtailment of renewable energy, being able to provide intra-day storage. Among those systems, Carnot batteries operating with CO2 can be a promising solution due to the relatively high round trip efficiencies (up to 60%), being sit...

This work focuses on innovative thermally integrated Carnot batteries exploiting low temperature sensible waste heat, available at temperatures between 70°C and 100°C, while adopting a sensible solid-based thermal energy storage system. The charging cycle is based on transcritical heat pumps operating with CO 2 -based mixtures, representing the mos...

Transcritical heat pumps working with CO2-based mixtures with a low-volatility dopant are found to achieve good performances in thermally integrated heat pumps, especially when sensible heat sources and heat sinks are considered. This paper introduces in literature tetrachloroethylene, C2Cl2, as CO2-dopant for the mixture to be adopted as working f...

This work presents the preliminary performance of the simple recuperative transcritical power cycle of the DESOLINATION project demo plant. The cycle operates with the CO2+SO2 mixture and it is air-cooled, built in a CSP-like environment with high radiation and high ambient temperature. The axial turbine, with a flowrate of 0.2 m3/s at its inlet, i...

This work, performed in the framework of the H2020 EU project "DESOLI-NATION", analyses the coupling between CSP plants using transcritical power cycles with CO2-mixtures and an innovative thermal desalination technique based on Forward Osmosis. Calculations are presented for a large scale CSP plant with central tower receiver and direct storage wi...

This work summarizes the methodology developed within the H2020 EU project SCARABEUS for the analysis of innovative CO2-based mixtures used as working fluid in transcritical cycles for CSP applications. By adding a specific quantity of carefully selected dopant to CO2 it is possible to reach a high mixture critical temperature, suitable for air coo...

This study investigates the potential of trigeneration systems utilizing CO2-based power cycles to harness high-temperature excess heat. Various CO2-based cycles are proposed, comprising pure CO2 and CO2-mixture, emphasizing integration into district heating and cooling networks. Given the non-isothermal heat rejection of CO2-based cycles, performa...

The waste heat released by high-temperature processes can be exploited by power cycle designed for full electric or combined heat and power applications, with the potential to cover even the cooling demand in a trigenerative perspective. The use of CO2-based mixtures as working fluids for power cycles can be a promising solution for power productio...

This work analyses the integration of concentrated solar power plants based on innovative sCO2 cycles and transcritical CO2-based mixtures cycles with thermal desalination plants adopting the conventional MED technology. In these cogeneration plants, all heat rejected from the cycle is exploited by the desalination system, avoiding any parasitic el...

This work focuses on the off-design analysis of a simple recuperative transcritical power cycle working with the CO2+C6F6 mixture as working fluid. The cycle is air-cooled and proposed for a state-of-the-art concentrated solar plant with solar salts as heat transfer fluid in a hot region, with a cycle minimum and maximum temperature of 51 °C and 55...

In this work three CO2-based binary mixtures, CO2 + C6F6, CO2 + C2H3N and CO2 + C4F8 , are compared as innovative working fluids for closed power cycles in CSP plants. Adopted in transcritical cycles, they lead to cycle efficiencies higher than sCO2 cycles at minimum temperatures above 50°C, a typical condition for arid regions with high solar radi...

The waste heat potentially available from a wide range of industrial processes still represents a significant fraction of the primary energy consumption related to the processes. Some of the most energy intensive processes can be categorized in the iron, steel and glass production, the fine chemical industry, and the production of non-ferrous mater...

This work investigates performances and costs of various configurations of 5 MW el solar tower CSP plants, located in Sicily. The design of the plants aims at comparing two solar towers concepts (i.e., a single tower and modular towers), both adopting billboard receivers. A sensitivity on various heat transfer fluids (i.e., solar salt and sodium),...

CO2 blends provide tremendous advantages when used as a working fluid in transcritical power cycles with respect to pure CO2. The benefits become especially apparent if coupled with concentrated solar power since increasing the critical temperature of the blend with respect to pure CO2 allows dry condensing at high ambient temperatures in locations...

The adoption of CO2-based mixtures as power block working fluid for CSP plant can turn supercritical CO2 cycles into efficient transcritical cycles even at high ambient temperature, with significant performance improvement and potential power block cost reduction. In this work, the use of CO2+C6F6 mixture as working fluid for a power cycle coupled...

Nowadays supercritical CO2 cycles are considered as a promising alternative to the traditional steam cycle for the power block in CSP plants with the aim of enhancing the system efficiency and reducing costs. This work deals with the experimental characterisation of a CO2 blend as working fluid in transcritical cycle: the addition of C6F6 as a dopa...

This paper focuses on the use of the CO2 + SO2 binary mixture as innovative working fluid for closed transcritical power cycles with a minimum temperature above 50 °C. Starting from a literature review of the available experimental data on the mixture, the PC-SAFT EoS is identified as a suitable model to characterize the mixture behavior. Once the...

Supercritical CO 2 cycles are a promising technology, but their performance drops for hot cold source, in hot and arid environments, typical of a CSP field. The adoption of CO 2 -based mixtures as working fluid can turn supercritical CO 2 cycles into transcritical cycles even at high temperatures, with performance improvement and significant power...

This work deals with the adoption of CO2-based mixtures as working fluid in transcritical cycles for CSP applications. A direct comparison with the small-scale CSP plant based on a Rankine cycle operating in Partanna (Italy) is developed to verify the potential advantages of the proposed novel cycles both in design conditions and on yearly basis. T...

sCO2 power cycle is the most investigated and most promising technology for replacing conventional steam cycle in CSP plants. Nevertheless, the efficiency of sCO2 power cycle is strongly penalized by high ambient temperatures which are typical of favourable CSP locations. This paper focuses on a new working fluid for power cycles which consists of...