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Salomon Popa, MarianneORCID iD iconorcid.org/0000-0002-3950-0809
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Publications (10 of 33) Show all publications
Araoz Ramos, J. A., Cardozo, E., Salomon, M., Alejo, L. & Fransson, T. (2015). Development and validation of a thermodynamic model for the performance analysis of a gamma Stirling engine prototype. Applied Thermal Engineering, 83, 16-30, Article ID 6439.
Open this publication in new window or tab >>Development and validation of a thermodynamic model for the performance analysis of a gamma Stirling engine prototype
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2015 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 83, p. 16-30, article id 6439Article in journal (Refereed) Published
Abstract [en]

This work presents the development and validation of a numerical model that represents the performance of a gamma Stirling engine prototype. The model follows a modular approach considering ideal adiabatic working spaces; limited internal and external heat transfer through the heat exchangers; and mechanical and thermal losses during the cycle. In addition, it includes the calculation of the mechanical efficiency taking into account the crank mechanism effectiveness and the forced work during the cycle. Consequently, the model aims to predict the work that can be effectively taken from the shaft. The model was compared with experimental data obtained in an experimental rig built for the engine prototype. The results showed an acceptable degree of accuracy when comparing with the experimental data, with errors ranging from +/- 1% to +/- 8% for the temperature in the heater side, less than +/- 1% error for the cooler temperatures, and +/- 1 to +/- 8% for the brake power calculations. Therefore, the model was probed adequate for study of the prototype performance. In addition, the results of the simulation reflected the limited performance obtained during the prototype experiments, and a first analysis of the results attributed this to the forced work during the cycle. The implemented model is the basis for a subsequent parametric analysis that will complement the results presented.

Keywords
Energy technology, Simulation and modelling, Stirling engine, Thermodynamic analysis
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-163046 (URN)10.1016/j.applthermaleng.2015.03.006 (DOI)000355349700003 ()2-s2.0-84925614881 (Scopus ID)
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20150817. Updated from e-pub head of print to published.

Available from: 2015-03-26 Created: 2015-03-26 Last updated: 2017-12-04Bibliographically approved
Araoz, J. A., Salomon, M., Alejo, L. & Fransson, T. (2014). Non-ideal Stirling engine thermodynamic model suitable for the integration into overall energy systems. Applied Thermal Engineering, 73(1), 203-219
Open this publication in new window or tab >>Non-ideal Stirling engine thermodynamic model suitable for the integration into overall energy systems
2014 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, ISSN 1359-4311, Vol. 73, no 1, p. 203-219Article in journal, Meeting abstract (Refereed) Published
Abstract [en]

The reliability of modelling and simulation of energy systems strongly depends on the prediction accuracy of each system component. This is the case of Stirling engine-based systems, where an accurate modelling of the engine performance is very important to understand the overall system behaviour. In this sense, many Stirling engine analyses with different approaches have been already developed. However, there is a lack of Stirling engine models suitable for the integration into overall system simulations. In this context, this paper aims to develop a rigorous Stirling engine model that could be easily integrated into combined heat and power schemes for the overall techno-economic analysis of these systems. The model developed considers a Stirling engine with adiabatic working spaces, isothermal heat exchangers, dead volumes, and imperfect regeneration. Additionally, it considers mechanical pumping losses due to friction, limited heat transfer and thermal losses on the heat exchangers. The predicted efficiency and power output were compared with the numerical model and the experimental work reported by the NASA Lewis Research Centre for the GPU-3 Stirling engine. This showed average absolute errors around ±4% for the brake power, and ±5% for the brake efficiency at different frequencies. However, the model also showed large errors (±15%) for these calculations at higher frequencies and low pressures. Additional results include the calculation of the cyclic expansion and compression work; the pressure drop and heat flow through the heat exchangers; the conductive, shuttle effect and regenerator thermal losses; the temperature and mass flow distribution along the system; and the power output and efficiency of the engine.

Place, publisher, year, edition, pages
Elsevier, 2014
Keywords
Stirling engine; simulation; thermodynamics;CHP;
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-150576 (URN)10.1016/j.applthermaleng.2014.07.050 (DOI)000346543400021 ()2-s2.0-84906080788 (Scopus ID)
Projects
Micro-Scale Biomass Polygeneration
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20140912

Available from: 2014-09-06 Created: 2014-09-06 Last updated: 2017-12-05Bibliographically approved
Salomon Popa, M., Gómez Galindo, M. F. & Martin, A. (2013). Optimal Upgrade of a District Heating Plant into a Polygeneration Plant Using Biomass as Feedstock. In: Power Division (Publication) POWER American Society of Mechanical Engineers: . Paper presented at ASME 2013 Power Conference, POWER 2013; Boston, MA, United States, 29 July-1 August, 2013.
Open this publication in new window or tab >>Optimal Upgrade of a District Heating Plant into a Polygeneration Plant Using Biomass as Feedstock
2013 (English)In: Power Division (Publication) POWER American Society of Mechanical Engineers, 2013Conference paper, Published paper (Refereed)
Abstract [en]

This paper aims at evaluating the possible upgrading of an existing district heating plant for production of electricity and pellets. The evaluation is carried out by optimizing the alternatives from the economic, thermodynamic and environmental point of view. In order to examine how the design can be optimized, a detailed model of the process has been elaborated using ASPEN Utilities and Matlab optimization toolbox. The parameters of the polygeneration plant have then been varied in order to examine how optimal economic benefit can be extracted from the biomass streams whilst still meeting the fundamental process demands of the industries and heat demand of the community. A multi-objective optimization has been used to investigate the Pareto-optimal trade-offs that exist between low electricity costs and investment cost. The resulting polygeneration plant designs conclude that it is feasible toproduce 18 and 25 MW of power while at the same time supplying the process steam required by the nearby industries and district heating for the community. The results also shown that it is feasible to operate the plant more hours per year by producing pellets and it could be possible to generate additional district heating (up to 25 ton/h of hot water) to cover the demands of a growing community.

Series
Power Division (Publication) POWER American Society of Mechanical Engineers ; Vol. 2
Keywords
Bioenergy, polygeneration, pellets, wood, CHP, cogeneration, district heating, multiobjective optimization
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-123682 (URN)10.1115/POWER2013-98165 (DOI)000349875400028 ()2-s2.0-84896281957 (Scopus ID)978-079185606-2 (ISBN)
Conference
ASME 2013 Power Conference, POWER 2013; Boston, MA, United States, 29 July-1 August, 2013
Funder
Swedish Energy Agency, P-30148
Note

QC 20140626

Available from: 2013-06-14 Created: 2013-06-14 Last updated: 2015-03-24Bibliographically approved
Salomon Popa, M., Gómez Galindo, M. F., Spelling, J. & Martin, A. (2013). Optimization of a Sawmill-Based Polygeneration Plant. In: Proceedings of the ASME Turbo Expo 2013: . Paper presented at ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013; San Antonio, Tx; United States. ASME Press
Open this publication in new window or tab >>Optimization of a Sawmill-Based Polygeneration Plant
2013 (English)In: Proceedings of the ASME Turbo Expo 2013, ASME Press, 2013Conference paper, Published paper (Refereed)
Abstract [en]

Biomass-based fuels have attracted worldwide interest due to their plentiful supply and their environmentally friendly characteristics. In many cases they are still considered waste but for most industries in Sweden, biomass has changed from being simply a disposal problem to become an important part of the energy supply, thanks to the long-term efforts made by the government, researchers and industry, where energy policies have played an important role. However, the amount of power that could be generated from biomass resources is much greater than that which is currently used. To effectively capture this resource requires a new generation of biomass power plants and their effective integration into already existing industrial processes.The implementation of an integrated polygeneration scheme requires the simultaneous consideration of technical, economic and environmental factors to find optimum solutions. With this in mind, a unified modeling approach that takes into account thermodynamic as well as economic and environmental aspects was used. The analysis was done using ASPEN Utilitiesand the MATLAB optimization toolbox. A specific case of a sawmill in Sweden, with an annual capacity of 130’000 m3 of sawn wood, has been analyzed and different options for generating electricity and process heat (for the sawmill and fora district heating network) as well as densified biofuels was analyzed. Optimization was then applied for different configurations and operational parameters. The results show that the sawmill has the capability to not only supply its own energy needs, but also to export from 0.4 to 1MW of electricity to the grid, contribute 5 to 6 MWth of district heating and 20 000 ton/y of biomass pellets. The production of pellets helps to maintain the electricity production throughout the year when the district heating demand is lower. However, the levelized electricity cost is higher than the usual electricity price in the Nordic electricity market and may have difficulty to competing with low-cost electricity sources, such as nuclear energy and hydropower. Inspite of this, polygeneration remains attractive for covering the energy demands of the sawmill and pelletization plant.

Place, publisher, year, edition, pages
ASME Press, 2013
Series
Proceedings of the ASME TurboExpo 2013 ; GT2013-95844
Keywords
Bioenergy; polygeneration; pellets; wood; sawmill; multiobjective optimization
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-123681 (URN)10.1115/GT2013-95844 (DOI)2-s2.0-84890179727 (Scopus ID)978-079185513-3 (ISBN)
Conference
ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013; San Antonio, Tx; United States
Funder
Swedish Energy Agency, P-30148
Note

QC 20140116

Available from: 2013-06-14 Created: 2013-06-14 Last updated: 2016-04-19Bibliographically approved
Salomon, M., Gómez, M. F., Erlich, C. & Martin, A. (2013). Pelletization: an alternative for polygeneration in the palm oil industry. Biomass Conversion and Biorefinery, 3(3), 213-229
Open this publication in new window or tab >>Pelletization: an alternative for polygeneration in the palm oil industry
2013 (English)In: Biomass Conversion and Biorefinery, ISSN 2190-6815, Vol. 3, no 3, p. 213-229Article in journal (Refereed) Published
Abstract [en]

Agricultural residues continue to attract interest for energy recovery purposes as a renewable, CO2 neutral and increasingly cost-competitive alternative to traditional fossil fuels. Furthermore, some of these residues, like palm oil residues, represent a disposal problem for the processing industries, or they are not used efficiently. Several palm oil mills (POM) lack efficient energy systems and thus there is a considerable potential for improvement. These factors represent a strong driving force for the development of innovative polygeneration plants with combined electricity, heat and refined fuel production based on conversion of solid residues. This paper aims at analyzing the use of agro-industrial residues as fuel. For that, we propose different technology configurations based on the case of a small-scale palm oil mill in Colombia processing 30 tons of fresh fruit bunch per hour. The technology configurations include steam cycles using backpressure turbines, condensing-extraction turbines and also gasification-gas engine cycles in hybrid configurations. The possibilities to produce pellets from the residues from palm oil were also analyzed. The steam cycle base operational parameters were 20 bar and 350 °C. However, more advanced steam conditions (40 bar) were also considered and evaluated. All the analyses performed included a maximum of 60 % of the empty fruit bunch (EFB) produced in the POM for energy purposes due to its value as natural fertilizer in the palm oil plantations. The results show that the POM under study and other POMs that use electricity from the national grid have the capacity of being self-sufficient to cover of all their energy needs using the solid residues available. This means that POMs that currently only generate the required heat for the process can generate the electricity required and in some cases even an excess of energy that could be sold to other users with an adequate use of the residues available. Furthermore, based on the modeling done in Aspen Utilities Planner® it is shown that it is possible to cover the demand of the POM, the required energy demand for EFB preparation included possible pelletization of these residues and even generate an excess of electricity. In several of the configurations, excess electricity generation could be achieved in the range of 0.5–8 MW.

Keywords
Bioenergy, Polygeneration, Palm oil residues, Pellets, EFB
National Category
Energy Engineering
Research subject
SRA - Energy
Identifiers
urn:nbn:se:kth:diva-123159 (URN)10.1007/s13399-013-0075-5 (DOI)
Note

QC 20150624

Available from: 2013-06-03 Created: 2013-06-03 Last updated: 2015-06-24Bibliographically approved
Salomon Popa, M., Gómez Galindo, M. F. & Martin, A. (2013). Technical polygeneration potential in palm oil mills in Colombia: A case study. Sustainable Energy Technologies and Assessments, 3, 40-52
Open this publication in new window or tab >>Technical polygeneration potential in palm oil mills in Colombia: A case study
2013 (English)In: Sustainable Energy Technologies and Assessments, ISSN 2213-1388, Vol. 3, p. 40-52Article in journal (Refereed) Published
Abstract [en]

Agricultural residues offer the possibility of reducing fossil fuel consumption, increasing energy security, and lowering  greenhouse gas emissions. However, certain residues, like palm oil residues, either represent a disposal problem for the processing industries or they are not used and thus, there is a considerable potential for improvement. These factors represent a strong driving force for the development of innovative polygeneration plants based on solid residues. This paper considers an energy analysis of a Palm Oil Mill (POM) in Colombia processing 30 ton of Fresh Fruit Bunch per hour (FFB/h).  Different heat and power generation options were considered with solid residues as feedstock. These configurations included steam cycles using backpressure or condensing-extraction turbines.  The possibilities to produce pellets from the residues and biodiesel from palm oil were also analyzed.  The steam cycle base operational parameters were 20 bar and 350 °C. More advanced steam conditions (40 bar) were also considered. The results show that it is possible to cover the demand of the POM and the required energy demand for residues preparation including possible pelletization and also biodiesel production. It is possible to obtain an excess of electricity between 0.4 and 3 MW if only residues are used.

Place, publisher, year, edition, pages
Elsevier, 2013
Keywords
Bioenergy, polygeneration, palm oil residues, biodiesel, palm oil
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-123673 (URN)10.1016/j.seta.2013.05.003 (DOI)2-s2.0-84879804175 (Scopus ID)
Projects
Sida Project SWE-2005-386.
Funder
Sida - Swedish International Development Cooperation Agency, 2005-386
Note

QC 20130625

Available from: 2013-06-14 Created: 2013-06-14 Last updated: 2016-04-19Bibliographically approved
Salomon Popa, M., Petrov, M. P. & Krothapalli, A. (2013). Thermoeconomic evaluation of integration concepts for solar & biomass hybrid power plants. In: Proceedings of the ASME Power Conference 2013: presented at ASME 2013 power conference, July 29-August 1, 2013, Boston, Massachusetts, USA. Paper presented at ASME 2013 Power Conference, POWER 2013; Boston, MA; United States, 29 July 2013 through 1 August 2013. ASME Press
Open this publication in new window or tab >>Thermoeconomic evaluation of integration concepts for solar & biomass hybrid power plants
2013 (English)In: Proceedings of the ASME Power Conference 2013: presented at ASME 2013 power conference, July 29-August 1, 2013, Boston, Massachusetts, USA, ASME Press, 2013Conference paper, Published paper (Refereed)
Abstract [en]

Solar thermal energy and biomass fuels are often available at locations where they can benefit from combined hybrid energy utilization methods for the generation of electricity, representing suitable and advantageous integration alternatives. The feasibility of concentrating solar power (CSP) systems depends on cost limitations, desired installed power capacity and direct solar insolation, where smaller scales and low-cost solutions can often be preferred to large-scale investmentintensive installations. Biomass residues of various types, on the other hand, can be considered as proven fuels for small-to-midscale utility or industry based power or cogen arrangements and utilized through various technologies. The thermodynamic integration between a biomass fired power plant and a CSP unit can help to significantly increase the availability of the plant, improve its partial load characteristics, compensate for the intermittency of the solar energy resource while preserving the purely renewable profile of the generated electricity, and at the same time showing better overall performance when compared to two separate plants while avoiding the need for costly energy storage solutions. Biomass fuels can help reach better steam conditions in a steam plant based on CSP-generated steam, and thus improve the efficiency of energy conversion for the integrated hybrid system if compared with two individual single-fuel power units. In this study, an overview of feasible solar-biomass integration concepts is presented. A deeper thermoeconomic analysis of a selected integrated utility-scale biomass and CSP electricity generation plant is attempted, with certain simplifications. Furthermore, a multiobjective optimization strategy is regarded as very necessary and thus included in the analysis, where several major environmental aspects plus the cost of electricity are involved and defined in terms of desired parameters and conditions representative to Central Europe and Southeastern United States. The results are compared with conventional power generation alternatives. On that basis, a low-parameter CSP solution integrated with conventional biomass-fired combustion unit, where solar-generated steam is being superheated by the biomass fuel, has been chosen as the focus of the analysis in this study.

Place, publisher, year, edition, pages
ASME Press, 2013
Keywords
solar, biomass, integration, hybrid, power plant, thermoeconomic evaluation, costs
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-123684 (URN)10.1115/POWER2013-98116 (DOI)000349875400022 ()2-s2.0-84896300656 (Scopus ID)978-079185606-2 (ISBN)
Conference
ASME 2013 Power Conference, POWER 2013; Boston, MA; United States, 29 July 2013 through 1 August 2013
Note

QC 20131030

Available from: 2013-06-14 Created: 2013-06-14 Last updated: 2015-12-07Bibliographically approved
Salomón Popa, M., Petrov, M., Krothapalli, A. & Greska, B. (2012). Technoeconomic Assessment of a Solar/Biomass Hybrid Plant. In: Proceedings of SEEP2012 conference, At DCU, Dublin, Ireland., Volume: 1: . Paper presented at 5th International Conference on Sustainable Energy & Environmental Protection (SEEP 2012), Dublin City University, Dublin 5-8 June 2012. Dublin
Open this publication in new window or tab >>Technoeconomic Assessment of a Solar/Biomass Hybrid Plant
2012 (English)In: Proceedings of SEEP2012 conference, At DCU, Dublin, Ireland., Volume: 1, Dublin, 2012Conference paper, Published paper (Refereed)
Abstract [en]

Solar and biomass are indigenous renewable resources that can be used for electricity production and that together represent an interesting and suitable combination. Solar energy can be converted to electricity using photovoltaic (PV) panels or concentrating solar power (CSP) systems. The feasibility of PV and CSP for a particular location depends on the cost, desired installed power capacity and direct solar insolation. Biomass on the other hand, can be first gasified and thereafter converted to electricity. The use of biomass together with a solar plant can help to improve significantly the availability of the plant as it can compensate for the intermittency of the solar energy resource while keeping its renewable profile and at the same time avoid the need to install costly energy storage solutions. Furthermore, biomass can help to reach better steam conditions in a CSP plant and thus improve the efficiency of the system. This paper analyzes from the technoeconomic viewpoint an innovative 5MWe hybrid power plant that provides cost effective electricity using medium temperature Concentrated Solar Power (CSP) and biomass gasification technologies. The plant consists of parabolic troughs that provide saturated steam at 250oC; biomass gasification technology using a downdraft gasifier design with variable feedstock utilization capability; an innovative two stage boiler to produce superheated steam at 440oC at 40 bar; an Organic Rankine Cycle system to extract energy from the waste heat of the steam cycle and a membrane distillation unit to produce purified water. The result of this study shows that feedwater preheating and heating of the water up to saturated liquid conditions could represent an interesting option for a wider utilization of solar energy worldwide. In terms of cost, although higher than other alternatives, the installation of hybrid solar/biomass plants could still be attractive and could represent an important alternative in certain locations.

Place, publisher, year, edition, pages
Dublin: , 2012
Keywords
Solar, biomass, bioenergy, power plants
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-144053 (URN)
Conference
5th International Conference on Sustainable Energy & Environmental Protection (SEEP 2012), Dublin City University, Dublin 5-8 June 2012
Note

QC 20150211

Available from: 2014-04-07 Created: 2014-04-07 Last updated: 2015-02-11Bibliographically approved
Fransson, T., Kazachkov, I., Popa, M. S. & Konoval, O. (2011). Collaboration of the Swedish-ukrainian universities in the development and implementation of the interactive multimedia teaching-learning system.
Open this publication in new window or tab >>Collaboration of the Swedish-ukrainian universities in the development and implementation of the interactive multimedia teaching-learning system
2011 (English)Other (Other academic)
National Category
Pedagogy
Identifiers
urn:nbn:se:kth:diva-77824 (URN)
Note

QCR 20160620

Available from: 2012-02-07 Created: 2012-02-07 Last updated: 2016-06-20Bibliographically approved
Salomon Popa, M., Savola, T., Martin, A., Fogelholm, C.-J. & Fransson, T. (2011). Small-scale biomass CHP plants in Sweden and Finland. Renewable & sustainable energy reviews, 15(9), 4451-4465
Open this publication in new window or tab >>Small-scale biomass CHP plants in Sweden and Finland
Show others...
2011 (English)In: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 15, no 9, p. 4451-4465Article in journal (Refereed) Published
Abstract [en]

Biomass continues to attract much interest as a renewable, low-CO2, and increasingly cost competitive alternative to traditional fossil fuels for heat and/or electric power generation. At the same time, deregulation of electricity markets offer new opportunities for small-scale decentralized power plants (<20 MWe) in an area where traditional centralized technologies mostly dominate. These factors represent a strong driving force for the development of innovative small-scale combined heat and power (CHP) plants based on biofuels. This paper provides an overview of small-scale CHP with biomass as a fuel. A survey of existing plants in Sweden and Finland is presented, along with an overview of major energy conversion technologies under development. Information is provided related to energy taxation along with an outlook on future prospects.

Keywords
Biomass, Combined heat and power, Small-scale, Low CO2 emissions
National Category
Energy Engineering
Research subject
SRA - Energy
Identifiers
urn:nbn:se:kth:diva-47883 (URN)10.1016/j.rser.2011.07.106 (DOI)000298764400025 ()2-s2.0-81955164860 (Scopus ID)
Funder
StandUp
Note

QC 20150629

Available from: 2011-11-15 Created: 2011-11-15 Last updated: 2017-12-08Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-3950-0809

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