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A real case study of an energy system based on a Solar Assisted Heat Pump (SAHP) fed by hybrid photovoltaic-thermal solar panels (PVT) and seasonal storage (SS) is presented in this paper. Exergy and exergy cost analyses are proposed as complementary methods for the assessment and better understanding of the efficiency of this cogeneration solar configuration. The system performance takes advantage of storage heat in summer, when the solar resource is high in Spain, and is then later consumed during the cold winter (heating season). The building is devoted to social housing, and it is currently under construction. The assessment is based on simulations developed using TRNSYS, a dynamic simulation software for energy systems. Results show that the unit exergy cost of the solar field is around 6. The cost of the seasonal storage is higher, about 13, and its formation is affected both by its own irreversibility and by the irreversibility of the PVT solar field. The cost of the heat delivered by the heat pump is around 15, being affected by all the upstream units and even by the grid. Besides, the analysis points out strategies for improving the system efficiency, such as increasing the size of the storage tank or improving the control strategy of the boiler.
Amaya Martínez-Gracia; Sergio Usón; Mª Pintanel; Javier Uche; Ángel Bayod-Rújula; Alejandro Del Amo. Exergy Assessment and Thermo-Economic Analysis of Hybrid Solar Systems with Seasonal Storage and Heat Pump Coupling in the Social Housing Sector in Zaragoza. Energies 2021, 14, 1279 .
AMA StyleAmaya Martínez-Gracia, Sergio Usón, Mª Pintanel, Javier Uche, Ángel Bayod-Rújula, Alejandro Del Amo. Exergy Assessment and Thermo-Economic Analysis of Hybrid Solar Systems with Seasonal Storage and Heat Pump Coupling in the Social Housing Sector in Zaragoza. Energies. 2021; 14 (5):1279.
Chicago/Turabian StyleAmaya Martínez-Gracia; Sergio Usón; Mª Pintanel; Javier Uche; Ángel Bayod-Rújula; Alejandro Del Amo. 2021. "Exergy Assessment and Thermo-Economic Analysis of Hybrid Solar Systems with Seasonal Storage and Heat Pump Coupling in the Social Housing Sector in Zaragoza." Energies 14, no. 5: 1279.
Experimental tests of a small polygeneration plant unit based on hybrid renewable energy and desalination have been used to validate a novel model simulation of this plant. It provides electricity by coupling photovoltaic/thermal collectors and a micro-wind turbine, fresh water by means of hybrid desalination (membrane distillation, and reverse osmosis), and sanitary hot water coming from the photovoltaic/thermal collectors and an evacuated tubes collector. Plant was designed to operate in off-grid conditions and conventional energy storage systems were used (lead acid batteries and hot water tank). Simulation model was performed in TRNSYS environment and it was fully validated by comparing several key plant measurements. The analysis was focused on five typical days of summer, fall and winter. Some differences found in experimental and simulated values were analysed. To reduce those gaps, some modifications have been suggested to the model or the pilot unit respectively. As a result, a validated model in TRNSYS of the plant was obtained. This model can be used for the further scale up of new projects to cover any other scheduled demands of power and water in isolated areas, whenever is based on the combination of the abovementioned technologies.
J. Uche; A. Muzás; L.E. Acevedo; S. Usón; A. Martínez; A.A. Bayod. Experimental tests to validate the simulation model of a Domestic Trigeneration Scheme with hybrid RESs and Desalting Techniques. Renewable Energy 2020, 155, 407 -419.
AMA StyleJ. Uche, A. Muzás, L.E. Acevedo, S. Usón, A. Martínez, A.A. Bayod. Experimental tests to validate the simulation model of a Domestic Trigeneration Scheme with hybrid RESs and Desalting Techniques. Renewable Energy. 2020; 155 ():407-419.
Chicago/Turabian StyleJ. Uche; A. Muzás; L.E. Acevedo; S. Usón; A. Martínez; A.A. Bayod. 2020. "Experimental tests to validate the simulation model of a Domestic Trigeneration Scheme with hybrid RESs and Desalting Techniques." Renewable Energy 155, no. : 407-419.
New temperature limits model of the Ranque–Hilsch vortex tube has been proposed within the presented paper. The model originates from the local compression/expansion and inner friction hypothesis anticipated to be responsible for the Ranque–Hilsch effect. The model in a presented form provides a fair estimation of the temperature limits at each outlet, hence enabling its application on new thermodynamic cycles studies that include vortex tube in the process. The drawback of the proposed model is its simplification by neglecting the impact of kinetic energy on the anticipated temperature values at each outlet.
Paweł Bargiel; Janusz Skorek; Sergio Uson; Adam Klimanek; Wojciech Kostowski. Vortex Tube Operational Temperature Regime. Journal of Energy Resources Technology 2020, 142, 1 -14.
AMA StylePaweł Bargiel, Janusz Skorek, Sergio Uson, Adam Klimanek, Wojciech Kostowski. Vortex Tube Operational Temperature Regime. Journal of Energy Resources Technology. 2020; 142 (8):1-14.
Chicago/Turabian StylePaweł Bargiel; Janusz Skorek; Sergio Uson; Adam Klimanek; Wojciech Kostowski. 2020. "Vortex Tube Operational Temperature Regime." Journal of Energy Resources Technology 142, no. 8: 1-14.
El modelo de enseñanza tradicional ha perdido su utilidad en un mundo cada vez más digitalizado y globalizado. Por ello, en los últimos años se está cuestionando seriamente el papel que jugarán las universidades en las próximas décadas. Si no crean valor añadido a las clases presenciales, perderán alumnos y podrían llegar a desaparecer. El modelo pedagógico de aula inversa podría ser la respuesta natural a muchos de los retos a los que debe enfrentarse la Universidad si quiere seguir manteniendo su posición de liderazgo en la sociedad.El presente trabajo recoge y compara las experiencias sobre aula inversa llevadas a cabo en varias asignaturas del área de Máquinas y Motores Térmicos de la Universidad de Zaragoza durante los últimos tres cursos académicos. A partir de la experiencia adquirida, se recogen pautas para planificar adecuadamente la aplicación de aula inversa, tanto en sesiones de laboratorio como en clases magistrales.
Begoña Peña; Ignacio Zabalza; Eva Llera; Sergio Usón. El modelo de aula inversa en el área de Máquinas y Motores Térmicos: análisis y comparación de experiencias. Libro de Actas IN-RED 2019: V Congreso de Innovación Edicativa y Docencia en Red 2019, 1 .
AMA StyleBegoña Peña, Ignacio Zabalza, Eva Llera, Sergio Usón. El modelo de aula inversa en el área de Máquinas y Motores Térmicos: análisis y comparación de experiencias. Libro de Actas IN-RED 2019: V Congreso de Innovación Edicativa y Docencia en Red. 2019; ():1.
Chicago/Turabian StyleBegoña Peña; Ignacio Zabalza; Eva Llera; Sergio Usón. 2019. "El modelo de aula inversa en el área de Máquinas y Motores Térmicos: análisis y comparación de experiencias." Libro de Actas IN-RED 2019: V Congreso de Innovación Edicativa y Docencia en Red , no. : 1.
Ángel Antonio Bayod Rújula; Amaya Martínez-Gracia; Alejandro Del Amo; Marta Cañada; Sergio Usón; Javier Uche; Juan A. Tejero. Integration of Thermoelectric generators (TEG) in Solar PVT panels. Renewable Energy and Power Quality Journal 2019, 17, 495 -499.
AMA StyleÁngel Antonio Bayod Rújula, Amaya Martínez-Gracia, Alejandro Del Amo, Marta Cañada, Sergio Usón, Javier Uche, Juan A. Tejero. Integration of Thermoelectric generators (TEG) in Solar PVT panels. Renewable Energy and Power Quality Journal. 2019; 17 ():495-499.
Chicago/Turabian StyleÁngel Antonio Bayod Rújula; Amaya Martínez-Gracia; Alejandro Del Amo; Marta Cañada; Sergio Usón; Javier Uche; Juan A. Tejero. 2019. "Integration of Thermoelectric generators (TEG) in Solar PVT panels." Renewable Energy and Power Quality Journal 17, no. : 495-499.
A. Martínez-Gracia; A. Del Amo; S. Torné; Ángel Antonio Bayod Rújula; J. Uche; Sergio Usón. Solar-assisted heat pump coupled to solar hybrid panels. Renewable Energy and Power Quality Journal 2019, 17, 578 -582.
AMA StyleA. Martínez-Gracia, A. Del Amo, S. Torné, Ángel Antonio Bayod Rújula, J. Uche, Sergio Usón. Solar-assisted heat pump coupled to solar hybrid panels. Renewable Energy and Power Quality Journal. 2019; 17 ():578-582.
Chicago/Turabian StyleA. Martínez-Gracia; A. Del Amo; S. Torné; Ángel Antonio Bayod Rújula; J. Uche; Sergio Usón. 2019. "Solar-assisted heat pump coupled to solar hybrid panels." Renewable Energy and Power Quality Journal 17, no. : 578-582.
Javier Uche; Luis Acevedo; Fernando Círez; Sergio Usón; Amaya Martínez-Gracia; Ángel Antonio Bayod Rújula. Analysis of a domestic trigeneration scheme with hybrid renewable energy sources and desalting techniques. Journal of Cleaner Production 2019, 212, 1409 -1422.
AMA StyleJavier Uche, Luis Acevedo, Fernando Círez, Sergio Usón, Amaya Martínez-Gracia, Ángel Antonio Bayod Rújula. Analysis of a domestic trigeneration scheme with hybrid renewable energy sources and desalting techniques. Journal of Cleaner Production. 2019; 212 ():1409-1422.
Chicago/Turabian StyleJavier Uche; Luis Acevedo; Fernando Círez; Sergio Usón; Amaya Martínez-Gracia; Ángel Antonio Bayod Rújula. 2019. "Analysis of a domestic trigeneration scheme with hybrid renewable energy sources and desalting techniques." Journal of Cleaner Production 212, no. : 1409-1422.
In this paper, the analysis of the local exergy costs of a cullet glass heated by microwaves in a cubical cavity activated by a susceptor is presented. The analysis is based on a previously validated 3-D electromagnetic model, but goes further by applying the concepts of local exergy efficiency and local unit exergy consumption, what enables a local analysis (in time and space) of the process efficiency. Furthermore, local exergy cost quantifies in detail the path of the exergy cost formation during microwave heating, which is determined by the local irreversibilities taking place in this transient process. Four different susceptor positions have been also compared, in order to find out not only which one is the most efficient but also to justify in detail this result by the time and space evolution of efficiency, unit exergy consumption (both external microwave power and conduction contributions) and unit exergy cost. The best conclusion of the paper is that the local exergy cost approach can contribute to the design of more efficient energy conversion systems, as it could be noted in its application to a complex process like this 3-D example of microwave cullet heating.
Luis Acevedo; Sergio Usón; Javier Uche. Local exergy cost analysis of cullet glass heating by microwaves. Applied Thermal Engineering 2019, 152, 778 -795.
AMA StyleLuis Acevedo, Sergio Usón, Javier Uche. Local exergy cost analysis of cullet glass heating by microwaves. Applied Thermal Engineering. 2019; 152 ():778-795.
Chicago/Turabian StyleLuis Acevedo; Sergio Usón; Javier Uche. 2019. "Local exergy cost analysis of cullet glass heating by microwaves." Applied Thermal Engineering 152, no. : 778-795.
Maize is the most important staple crop in Mexico and is cultivated under varied agro-climatic and socio-economic conditions. The aim of this study is to estimate energy use, cumulative exergy consumption (CExC), and greenhouse gas (GHG) emissions of different maize production systems as proxies to compare their resource use and environmental performance. Based on average values, per-hectare energy use, energy intensity (EI), energy output-input ratio (ER), and net energy (NE) are in the range of 2.3–40.2 GJ ha−1, 1.8–8.5 MJ kg−1, 1.7–12.0, and 16.3–73.1 GJ ha−1, respectively. Per-hectare CExC, exergy intensity (ExI), exergy output-input ratio (ExR), and net exergy (NEx) are in the range of 2.5–52.1 GJ ha−1, 1.9–10.7 MJ kg−1, 1.6–14.1, and 19.6–86.8 GJ ha−1, respectively. Per-hectare GHG emissions, GHG intensity (GHGI), and GHG per unit energy input (GHGEi) are in the range of 152.9–3475.8 kg CO2e ha−1, 116.5–601.9 kg CO2e Mg−1, and 63.1–117.2 kg CO2e GJ−1, respectively. Low-input rain-fed production systems perform better in EI, ER, ExI, ExR, GHGI, and GHGEi though, they also show the lowest NE and NEx due to poor yields. High-input surface irrigated production systems have the highest NE and NEx coupled with medium values of EI, ExI, and GHGI due to high productivity.
Sergio Juárez-Hernández; Sergio Usón; Claudia Sheinbaum Pardo. Assessing maize production systems in Mexico from an energy, exergy, and greenhouse-gas emissions perspective. Energy 2018, 170, 199 -211.
AMA StyleSergio Juárez-Hernández, Sergio Usón, Claudia Sheinbaum Pardo. Assessing maize production systems in Mexico from an energy, exergy, and greenhouse-gas emissions perspective. Energy. 2018; 170 ():199-211.
Chicago/Turabian StyleSergio Juárez-Hernández; Sergio Usón; Claudia Sheinbaum Pardo. 2018. "Assessing maize production systems in Mexico from an energy, exergy, and greenhouse-gas emissions perspective." Energy 170, no. : 199-211.
Exergy and exergy cost analyses are proposed as complementary methods for the assessment and better understanding of the efficiency of a hybrid trigeneration system based on renewable energy sources. The system combines photovoltaic/thermal collectors, an evacuated tube collector and a wind turbine and produces electricity, sanitary hot water and desalted fresh water for a single family house. The system includes two desalination technologies (reverse osmosis and membrane distillation) that consume power and heat respectively, and two kinds of energy storage devices (a hot water tank and two lead-acid batteries). The assessment is based on simulations developed by using TRNSYS software. As a first level of detail, exergy analysis is applied in ten-minute basis to selected plant components. As a second level of detail, it is proposed to apply exergy-based indicators that summarize the system behavior during a longer period of time (monthly basis). By using aggregated values, exergy accumulation terms become negligible, what allows applying symbolic thermoeconomics to calculate exergy cost and to analyze in depth the process of cost formation. The system has an exergy efficiency of 7.76% (6.68 due to electricity, 0.33 due to fresh water and 0.75 due to sanitary hot water).
Sergio Usón; Javier Uche; Amaya Martínez; Alejandro del Amo; Luis Acevedo; Ángel Bayod. Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply. Energy 2018, 168, 662 -683.
AMA StyleSergio Usón, Javier Uche, Amaya Martínez, Alejandro del Amo, Luis Acevedo, Ángel Bayod. Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply. Energy. 2018; 168 ():662-683.
Chicago/Turabian StyleSergio Usón; Javier Uche; Amaya Martínez; Alejandro del Amo; Luis Acevedo; Ángel Bayod. 2018. "Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply." Energy 168, no. : 662-683.
El modelo de clase inversa (FCM) presenta muchas ventajas con respecto al modelo tradicional, ya que los estudiantes desempeñan un papel principal en las sesiones presenciales aumentando esto su motivación y satisfacción, las metodologías activas y las Tecnologías de la Información y la Comunicación (TIC) se integran naturalmente en el proceso de aprendizaje, y ciertas competencias transversales pueden ser desarrolladas y evaluadas en el aula. Motivados por estas ventajas, los autores han llevado a cabo varias experiencias en FCM durante los dos últimos cursos académicos en el contexto de la Ingeniería Térmica en la Universidad de Zaragoza (España). En el marco de dos proyectos financiados por el Programa de Incentivación de la Innovación Docente (PIIDUZ_16_032 y PIIDUZ_17_299), se implementaron diferentes metodologías y recursos para las actividades a realizar dentro y fuera del aula. Las observaciones y los resultados de estas experiencias en diferentes materias y niveles académicos se analizan aquí y se comparan con respecto a varios criterios. En todos los casos, la recepción de los estudiantes fue muy positiva, pero la influencia en el proceso de aprendizaje depende en gran medida del uso que los estudiantes hacen de los materiales proporcionados por el profesor. Algunas cuestiones a este respecto se discuten en el presente documento. Palabras clave: Moodle, Vídeos Didácticos, Clase Inversa, Innovación Universitaria, Educación en Ingeniería.
Begoña Peña; Ignacio Zabalza; Eva Llera Sestresa; Sergio Usón; Luis Romeo. Aplicación del modelo de clase inversa en el campo de la Ingeniería Térmica: análisis y comparación de varios contextos. Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red 2018, 1 .
AMA StyleBegoña Peña, Ignacio Zabalza, Eva Llera Sestresa, Sergio Usón, Luis Romeo. Aplicación del modelo de clase inversa en el campo de la Ingeniería Térmica: análisis y comparación de varios contextos. Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red. 2018; ():1.
Chicago/Turabian StyleBegoña Peña; Ignacio Zabalza; Eva Llera Sestresa; Sergio Usón; Luis Romeo. 2018. "Aplicación del modelo de clase inversa en el campo de la Ingeniería Térmica: análisis y comparación de varios contextos." Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red , no. : 1.
El objetivo de este trabajo es reflexionar sobre los principales aspectos metodológicos a tener en cuenta en el desarrollo de vídeos docentes para su uso como objetos de aprendizaje modulares y reutilizables.Esta reflexión es uno de los resultados del trabajo desarrollado por los autores en un proyecto de innovación docente financiado por la Universidad de Zaragoza durante los cursos académicos 2015-16, 2016-17 y 2017-18. En este proyecto, se han creado 25 videos docentes bajo licencias para mejorar los resultados de aprendizaje de cinco asignaturas en el campo de la Termodinámica y la Ingeniería Térmica, que actualmente se imparten en tres titulaciones distintas.Preparar vídeos docentes requiere estrategias diferentes a las de una clase en vivo y aspectos como el enfoque de los contenidos, la adecuación al medio y la calidad técnica influyen en la efectividad como herramienta de aprendizaje por lo que deben de ser tenidos en cuenta en su fase de desarrollo.Palabras clave: vídeos docentes, metodologías activas, enseñanza de la ingeniería
Eva María Llera; Ignacio Zabalza; Begoña Peña; Sergio Usón; Amaya Martínez; Luis Miguel Romeo. Aspectos metodológicos para la elaboración de videos docentes para su uso como objetos de aprendizaje modulares y reutilizables. Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red 2018, 1 .
AMA StyleEva María Llera, Ignacio Zabalza, Begoña Peña, Sergio Usón, Amaya Martínez, Luis Miguel Romeo. Aspectos metodológicos para la elaboración de videos docentes para su uso como objetos de aprendizaje modulares y reutilizables. Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red. 2018; ():1.
Chicago/Turabian StyleEva María Llera; Ignacio Zabalza; Begoña Peña; Sergio Usón; Amaya Martínez; Luis Miguel Romeo. 2018. "Aspectos metodológicos para la elaboración de videos docentes para su uso como objetos de aprendizaje modulares y reutilizables." Libro de Actas IN-RED 2018: IV Congreso Nacional de Innovación Educativa y Docencia en Red , no. : 1.
Ignacio Zabalza; Begoña Peña; Eva María Llera; Sergio Usón; Amaya Martínez; Luis Miguel Romeo. DEVELOPMENT OF AN OPEN COURSEWARE (OCW) WITH AUDIO-VISUAL MATERIAL TO SUPPORT THE STUDY OF THERMODYNAMICS AND THERMAL ENGINEERING. EDULEARN18 Proceedings 2018, 4063 -4067.
AMA StyleIgnacio Zabalza, Begoña Peña, Eva María Llera, Sergio Usón, Amaya Martínez, Luis Miguel Romeo. DEVELOPMENT OF AN OPEN COURSEWARE (OCW) WITH AUDIO-VISUAL MATERIAL TO SUPPORT THE STUDY OF THERMODYNAMICS AND THERMAL ENGINEERING. EDULEARN18 Proceedings. 2018; ():4063-4067.
Chicago/Turabian StyleIgnacio Zabalza; Begoña Peña; Eva María Llera; Sergio Usón; Amaya Martínez; Luis Miguel Romeo. 2018. "DEVELOPMENT OF AN OPEN COURSEWARE (OCW) WITH AUDIO-VISUAL MATERIAL TO SUPPORT THE STUDY OF THERMODYNAMICS AND THERMAL ENGINEERING." EDULEARN18 Proceedings , no. : 4063-4067.
Begoña Peña; Ignacio Zabalza; Eva María Llera; Sergio Usón; Luis Miguel Romeo. APPLICATION OF FLIPPED CLASSROOM MODEL IN THERMAL ENGINEERING: ANALYSIS AND COMPARISON OF RESULTS. EDULEARN18 Proceedings 2018, 4090 -4097.
AMA StyleBegoña Peña, Ignacio Zabalza, Eva María Llera, Sergio Usón, Luis Miguel Romeo. APPLICATION OF FLIPPED CLASSROOM MODEL IN THERMAL ENGINEERING: ANALYSIS AND COMPARISON OF RESULTS. EDULEARN18 Proceedings. 2018; ():4090-4097.
Chicago/Turabian StyleBegoña Peña; Ignacio Zabalza; Eva María Llera; Sergio Usón; Luis Miguel Romeo. 2018. "APPLICATION OF FLIPPED CLASSROOM MODEL IN THERMAL ENGINEERING: ANALYSIS AND COMPARISON OF RESULTS." EDULEARN18 Proceedings , no. : 4090-4097.
Flipped classroom model (FCM) and educational videos have been applied in several subjects related to thermal engineering. Results have been evaluated by questionnaires, observation in the classroom and also number of videos visualization. In general, students evaluate positively the application of the new methodologies, although some suggestions for improvement have been obtained. In particular, the use of videos can reduce some of the difficulties of FCM related to previous preparation by students. Finally, students’ marks have been compared to number of videos watched, and a positive (although weak) trend has been seen.
Sergio Usón; Begoña Peña; Ignacio Zabalza; Eva María Llera; Luis Miguel Romeo. Combining Flipped Classroom Model and Educational Videos for Improving Teaching-Learning Process in Thermodynamics and Thermal Engineering. Proceedings 2018, 2, 1329 .
AMA StyleSergio Usón, Begoña Peña, Ignacio Zabalza, Eva María Llera, Luis Miguel Romeo. Combining Flipped Classroom Model and Educational Videos for Improving Teaching-Learning Process in Thermodynamics and Thermal Engineering. Proceedings. 2018; 2 (21):1329.
Chicago/Turabian StyleSergio Usón; Begoña Peña; Ignacio Zabalza; Eva María Llera; Luis Miguel Romeo. 2018. "Combining Flipped Classroom Model and Educational Videos for Improving Teaching-Learning Process in Thermodynamics and Thermal Engineering." Proceedings 2, no. 21: 1329.
J.M. Belman-Flores; Victor Hugo Rangel-Hernandez; Sergio Usón; Carlos Rubio-Maya. Energy and exergy analysis of R1234yf as drop-in replacement for R134a in a domestic refrigeration system. Energy 2017, 132, 116 -125.
AMA StyleJ.M. Belman-Flores, Victor Hugo Rangel-Hernandez, Sergio Usón, Carlos Rubio-Maya. Energy and exergy analysis of R1234yf as drop-in replacement for R134a in a domestic refrigeration system. Energy. 2017; 132 ():116-125.
Chicago/Turabian StyleJ.M. Belman-Flores; Victor Hugo Rangel-Hernandez; Sergio Usón; Carlos Rubio-Maya. 2017. "Energy and exergy analysis of R1234yf as drop-in replacement for R134a in a domestic refrigeration system." Energy 132, no. : 116-125.
This chapter provides three examples illustrating the usefullness of the concepts of exergy, exergy cost and thermo-ecological cost. The first example is related to exergo-ecological evaluation of adsorption chiller system. System consisted of cogeneration, solar collector and adsorption chiller are analyzed using the concept of thermo-ecological cost. The second example is devoted to thermo-ecological assessment of combined cold-heat-and-power plant CCHP plant supported with renewable energy. The aim of this analysis is to apply the exergo-ecological analysis for selected CCHP trigenaration system based on two renewable resources (biogas/solar radiation). The third example concerns the recovery of exergy from pressurized natural gas. The recovery system comprises a two-stage turbine expander integrated with a co-generation module. The example demonstrates the usefulness of exergy analysis, which, in contrast to energy analysis, provides tools to indicate and quantify the origin of the generated electricity. Finally, the studied case provides a numerical example for the calculation of unit exergy cost and of the thermo-ecological cost along the productive structure of the system.
Wojciech Stanek; Wiesław Gazda; Sergio Usón; Wojciech Kostowski. Exergo-ecological Assessment of Multi-generation Energy Systems. Green Energy and Technology 2017, 405 -442.
AMA StyleWojciech Stanek, Wiesław Gazda, Sergio Usón, Wojciech Kostowski. Exergo-ecological Assessment of Multi-generation Energy Systems. Green Energy and Technology. 2017; ():405-442.
Chicago/Turabian StyleWojciech Stanek; Wiesław Gazda; Sergio Usón; Wojciech Kostowski. 2017. "Exergo-ecological Assessment of Multi-generation Energy Systems." Green Energy and Technology , no. : 405-442.
An example of ironworks is used to illustrate the application of thermo-economic analysis to industrial ecology. The case study analyzes the changes in blast furnace plant when part of the coke is replaced by coal. The application of direct exergy analysis apparently shows that the replacement has negative effects, which is contrary to experience. This problem can be overcome by performing thermo-economic analysis extended with the thermo-ecological cost of resources consumed by the plant. The approach allows one to quantify precisely how unit exergy cost is formed. Furthermore, a methodology for quantifying local savings (reduction of components’ irreversibility due to improvements in their operation) and plant savings (reduction of resources consumption) is presented and applied to the example, what points out clearly where resources savings appear and how this positive effect is extended in the productive chain.
Sergio Usón; Wojciech Stanek. Application of Thermo-economic Analysis (TEA) to Industrial Ecology (IE). Green Energy and Technology 2017, 353 -370.
AMA StyleSergio Usón, Wojciech Stanek. Application of Thermo-economic Analysis (TEA) to Industrial Ecology (IE). Green Energy and Technology. 2017; ():353-370.
Chicago/Turabian StyleSergio Usón; Wojciech Stanek. 2017. "Application of Thermo-economic Analysis (TEA) to Industrial Ecology (IE)." Green Energy and Technology , no. : 353-370.
The aim of the chapter is to introduce thermoeconomics and thermoecology, which are methodologies based on exergy and cost. After introducing thermoeconomics, the concept of exergy cost and a theory that enables its calculation is presented. Exergy cost of a flow within a system is the amount of exergy resources consumed by that system that are needed for producing the flow. Afterwards, symbolic thermoeconomics is presented in detail; this is a matrix-based methodology that enables not only the calculation of exergy cost, but also other relevant issues such as the effect of residues and the detailed analysis of exergy cost formation. In a following section, thermoecological cost is presented; this cost is also based on exergy but has the main differences that it only takes into account non-renewable exergy resources and considers also the effect of emissions of harmful substances. Finally, a methodology for connecting thermoecological cost with symbolic thermoeconomics is presented. Simple examples have been introduced along the chapter in order to show the capabilities of the proposed approaches. Furthermore, the concepts and formulae introduced will be applied in later chapters of the book.
Antonio Valero; Sergio Usón; Wojciech Stanek; César Torres. Theory of Exergy Cost and Thermo-ecological Cost. Green Energy and Technology 2017, 167 -202.
AMA StyleAntonio Valero, Sergio Usón, Wojciech Stanek, César Torres. Theory of Exergy Cost and Thermo-ecological Cost. Green Energy and Technology. 2017; ():167-202.
Chicago/Turabian StyleAntonio Valero; Sergio Usón; Wojciech Stanek; César Torres. 2017. "Theory of Exergy Cost and Thermo-ecological Cost." Green Energy and Technology , no. : 167-202.
Conservation laws are important tools in analysis of thermal processes. In engineering practice, substance conservation law and energy conservation law are commonly used. Exergy analysis based on first and second law of thermodynamics are still rarely applied in engineering and industrial practices. Demonstration of its potential to examine the imperfection of thermodynamic processes, evaluation of efficiency of resources transformation as well as to measure ecological effects is one of the main aims of this book. Thus, in this section, fundamentals of first, second law and exergy analysis are presented. In Chap. 3, two examples illustrating the rules of exergy balances are included. They present energy and exergy evaluation of steam boiler and steam heat-and-power plant (CHP).
Wojciech Stanek; Jan Szargut; Sergio Usón. Fundamentals of Exergy Analysis. Green Energy and Technology 2017, 37 -80.
AMA StyleWojciech Stanek, Jan Szargut, Sergio Usón. Fundamentals of Exergy Analysis. Green Energy and Technology. 2017; ():37-80.
Chicago/Turabian StyleWojciech Stanek; Jan Szargut; Sergio Usón. 2017. "Fundamentals of Exergy Analysis." Green Energy and Technology , no. : 37-80.