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Gonzalo S. Martínez

Gonzalo S. Martínez
AICIA (Andalusian Association for Research & Industrial Cooperation) · Thermal Power Group

About

18
Publications
4,564
Reads
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599
Citations
Citations since 2016
16 Research Items
593 Citations
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2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140

Publications

Publications (18)
Conference Paper
Full-text available
Supercritical Carbon Dioxide (sCO2) power cycles have been proposed for Concentrated Solar Power (CSP) applications as a means to increase the performance and reduce the cost of state-of-the-art CSP systems. Nevertheless, the sensitivity of sCO2 systems to the usually hot ambient temperatures found in solar sites compromises the actual thermodynami...
Article
Full-text available
This paper provides an assessment of the expected Levelised Cost of Electricity enabled by Concentrated Solar Power plants based on Supercritical Carbon Dioxide (sCO 2 ) technology. A global approach is presented, relying on previous results by the authors in order to ascertain whether these innovative power cycles have the potential to achieve the...
Technical Report
Full-text available
The purpose of this document is to analyze the state-of-the-art of the CSP technology, focused on the solar tower configuration, and the possibility of integrating a supercritical CO2 (sCO2) cycle to substitute the traditional steam cycle. To that end, the document is divided in six sections. The first section presents a description of the fundamen...
Article
This paper presents the preliminary design and techno-economic assessment of an innovative solar system for the simultaneous production of water and electricity at small scale, based on the combination of a solar micro gas turbine and a bottoming desalination unit. To assess this system, a design model is developed to select the main design paramet...
Article
Full-text available
Previous work by the authors has shown that broader analyses than those typically found in literature (in terms of operating pressures allowed) can yield interesting conclusions with respect to the best candidate cycles for certain applications. This has been tested for the thermodynamic performance (first and second laws) but it can also be applie...
Conference Paper
Previous work by the authors has shown that broader analyses than those typically found in literature (in terms of operating pressures allowed) can yield interesting conclusions with respect to the best candidate cycles for certain applications. This has been tested for the thermodynamic performance (1st and 2nd Laws) but it can also be applied fro...
Article
Full-text available
After the renewed interest in supercritical carbon dioxide cycles, a large number of cycle layouts have been proposed in literature. These works, which are essentially theoretical, consider different operating conditions and modeling assumptions, and thus, the results are not comparable. There are also works that aim to provide a fair comparison be...
Conference Paper
Since the renewed interest in supercritical carbon dioxide cycles, a large number of cycle layouts have been proposed in literature. These analyses, which are essentially theoretical, consider different operating conditions and modelling assumptions and thus the results are not comparable. There are also works that aim to provide a fair comparison...
Conference Paper
This paper provides an analysis of the Optimised Microturbine Solar Power generator (OMSoP) project, funded by the European Commission, as the most recent attempt to develop a dish and mGT Concentrated Solar Power generation system that is cost competitive against photovoltaics, at least in certain business cases. A first section presents the syste...
Article
Full-text available
Power cycles running on carbon dioxide at supercritical pressure and temperature were introduced in the late ninety-sixties but, after a warm welcome to the theoretical performance announced, they were later abandoned in favour of standard combustion gas turbines. Nevertheless, the technology was brought forward about a decade ago and has since cap...
Article
This paper presents a detailed cost analysis of a small-scale Concentrated Solar Power (CSP) generator based on parabolic dish collectors and Micro Gas Turbines (mGT), whose technical feasibility was already demonstrated in previous publications by the consortium. The system can be used for either electric power or combined heat and power generatio...
Conference Paper
Full-text available
The utilisation of supercritical bottoming cycles in gas turbine based power plants is not new at all. A number of works have already been published discussing the real potential of this configuration as compared to the standard technology using subcritical steam turbines. Nevertheless, the interest of this paper relies on the global approach to cy...
Article
Organic Rankine Cycle (ORC) have principally been used in the past couple of decades to recover medium grade heat from sources such as geothermal, biomass and the exhaust of a realm of different industrial processes (waste heat recovery). In the past few years, this power generation technology has also been proposed in concentrating solar thermal p...
Article
This paper presents an innovative methodology to perform market analysis of a new solar power generation technology based on parabolic dish and micro gas turbine engines. Technical, economic, social and political parameters of influence are combined together into a single figure of merit: index of market potential. This index is an original approac...
Conference Paper
This work compares different approaches (i.e. fault distribution patterns) that aim to explain how a gas turbine compressor gets fouled and how its corresponding performance map deteriorates. To do so, a series of such maps is first developed based on an updated “stage-stacking” methodology. Then, the maps so developed are affected by fouling using...

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Projects

Project (1)
Project
The main objective of the SCARABEUS project is the reduction of the CAPEX and OPEX in concentrated solar power technologies by about 32% and 40% respectively, leading to a final cost of Electricity below 96 €/MWh (lower than 30% of the actual value) through an innovative power cycle based on CO2 blends. This cost reduction will be able to close the gap between CSP and other renewable technologies. With respect to state-of-the-art sCO2 cycles, the addition of small quantities of selected elements to pure CO2 (i.e. inorganic compounds and fluorocarbons), known as CO2 blending, can increase the CO2 critical point allowing the adoption of condensing cycle even in typical CSP plant locations. Condensing sCO2 cycles have higher thermal-to-electricity conversion efficiency with respect to conventional steam and sCO2 cycles.In addition, higher maximum operating temperature with respect to steam cycles can be adopted with further efficiency increase. The combination of these two aspects enables drastic reductions of the levelised cost of electricity In the project, CO2 blends stable at temperatures up to 700°C (which corresponds to 100°C above current CSP maximum temperatures) and with a pseudocritical temperature of about 50°C will be investigated. A preliminary screen was performed identifying some potential candidates (i.e. TiCl4). Assuming the simple cycle configuration, the TiCl4-blended CO2 outperforms the cycle using pure CO2 by 5% points at 700°C . When using the advanced sCO2 cycle, the efficiency gain is reduced to 2% points, but with significant cost savings. The proposed CO2 blend will be tested in a loop at 300 kWth scale with typical CSP fluids for 300 hours. Long term stability will be measured for 2000 hours and material compatibility assessed through dedicated experiments.