FRANCO Rovense - Academia.edu (original) (raw)

Papers by FRANCO Rovense

International Journal of Heat and Technology, 2016

In this paper, a solar tower power plant with a closed Joule-Brayton cycle, of 5 MW rate power, w... more In this paper, a solar tower power plant with a closed Joule-Brayton cycle, of 5 MW rate power, with molten salts thermal storage, located in Seville is presented. The peculiarity of the cycle, using air like fluid work, is to vary, by an auxiliary compressor and a vent valve, the pressure, so that fluid average density, at gas turbine inlet. An adjustment of the mass flow rate, in order to regulate the exit air temperature from the receiver of concentrating solar tower, is obtained. During energy surplus production, the thermal storage energy is loaded. Particular attention is placed to the energy thermal storage, which uses molten salt KCl-MgCl2, suitable for this application due to its high melting temperature, in double tank configuration. The thermodynamic model of the entire plant was implemented using Thermoflex ® software, while, for the concentrating tower, WinDelsol software was used. Using time data relating to the locations, the performance of the entire plant, during a year, has been simulated. Preliminary results show that this plant can achieve relevant benefits in total energy production and equivalent operation hours per year, therefore it is competitive with conventional energy production systems. Furthermore, a performances estimation with a cost analysis, using a LCOE parametric analysis, has been performed.

Renewable Energy, Feb 1, 2022

Obstacles encountered in the teaching-learning process leads to launch the lack of communication ... more Obstacles encountered in the teaching-learning process leads to launch the lack of communication between teachers and students. In this case, teachers should be more varied in applying learning methods. A similar thing happened at SDN Kampung Bulak 1 Ciputat where educational games needed a tool to enhance the interest and attention of the students to support the learning process in schools, especially information technology media such as educational games in teaching and learning process to minimize the obstacles that are often encountered in the learning process.With the edugame application is expected to provide benefits and knowledge for students of SDN Kampung Bulak I Ciputat about the introduction of information technology that is not monotonous because there are interfaces created interesting and interactive so that students do not make easily saturated in learning. This application is also used as an alternative device aids in teaching. The use of information technology in teaching and learning at the same time opening the door introduction to the world of animation multimedia interactive learning for students at SDN Kampung Bulak I Ciputat. Learning by listening, reading, viewing and interacting directly help improve memory and absorption student learning in the classroom.

SSRN Electronic Journal, 2021

Energy Conversion and Management, 2021

Concentrated solar power (CSP) plants using dense particle suspension as heat transfer fluid and ... more Concentrated solar power (CSP) plants using dense particle suspension as heat transfer fluid and particles as the storage medium are considered as a promising solution to provide the high temperature required for the supercritical carbon dioxide (S-CO 2) Brayton cycle. During plant operation, variations in the heat transfer fluid temperature and ambient temperature would significantly affect system performance. Determining the suitable S-CO 2 Brayton cycle configuration for this particle-based CSP plant requires accurate prediction and comprehensive comparison on the system performance both at design and off-design conditions. This study presents a common methodology to homogeneously assess the plant performance for six 10 MW S-CO 2 Brayton cycles (i.e. simple regeneration, recompression, precompression, intercooling, partial cooling and split expansion) integrated with a hot particles thermal energy storage and a dry cooling system. This methodology includes both design and off-design detailed models based on the characteristic curves of all components. The optimal design for each thermodynamic cycle has been determined under the same boundary design constrains by a genetic algorithm. Then, their off-design performances have been quantitatively compared under varying particle inlet temperature and ambient temperature, in terms of cycle efficiency, net power output and specific work. Results show that the variation in ambient temperature contributes to a greater influence on the cycle off-design performance than typical variations of the heat transfer fluid temperature. Cycles with higher complexity have larger performance deterioration when the ambient temperature increases, though they could present higher peak efficiency and specific work at design-point. In particular, the cycle with maximum efficiency or specific work presents significant changes in different ranges of ambient temperature. This means that for the selection of the best configuration, the typical off-design operation conditions should be considered as well. For integrating with high-temperature CSP plants and dry cooling systems, the simple regeneration and the recompression cycles are the most suitable S-CO 2 Brayton cycle configurations due to their fewer performance degradations at ambient temperatures above 30 • C, which is a frequent environmental condition in sunny areas of the world.

SOLARPACES 2019: International Conference on Concentrating Solar Power and Chemical Energy Systems, 2020

This work addresses the application of concentrating solar power (CSP) using a micro gas turbine ... more This work addresses the application of concentrating solar power (CSP) using a micro gas turbine for combined heat/cooling and power (CHP) generation. This system is connected to the micro-grid of a touristic resort in Italy of 33 bungalows. Modelling efforts have been focused onto control strategy definition and components sizing in order to follow heat and power demands simultaneously with the minimum fuel consumption. Results found proved the flexibility of this concept to efficiently cover the electric and heat demand despite input fluctuations (solar radiation and ambient temperature) and output fluctuations (heat and power demand changes). The hybridized solar concept saves up to 23% of fuel compared to conventional fueled gas turbine without efficiency penalty or supplying shortage.

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems, 2019

In this work it is evaluated the performance of regenerative closed Brayton power cycle for Conce... more In this work it is evaluated the performance of regenerative closed Brayton power cycle for Concentrating Solar Power (CSP) applications. Power plant components and operation control strategy have been designed in order to fully cover electricity demand of the grid to which it is connected in Sicily (Italy). Results analysis is proving that pure solar Brayton cycle can follow electricity demand curve during most of the day through base pressure and mass flow regulation of the closed-loop and the introduction of particles-based Thermal Energy Storage (TES) system between solar receiver and turbine. Operation flexibility and non-expensive price of the working fluid (air) and storage medium (particles) make this concept very attractive for CSP applications. Detail analysis of the results is showing that the selected 20-MW power block can produce around 42 GWh per year, and when TES is included the power plant operation will increase from 3393 hours to 4640 hours, which represents an increase of 53 % working time.

SAE Technical Paper Series, 2018

A educação inclusiva é um processo social que vem se desenvolvendo em todo o mundo e direciona os... more A educação inclusiva é um processo social que vem se desenvolvendo em todo o mundo e direciona os pensamentos para a reflexão sobre a educação e o papel da escola nos tempos atuais. Este estudo objetivou apreender as representações de alunos com surdez sobre sua inclusão nas aulas de Educação Física Escolar. Trata-se de uma pesquisa qualitativa, do tipo descritiva-exploratória e analítica, realizada em duas escolas públicas de um município do interior da Bahia, Brasil. Participaram da entrevista semiestruturada 8 alunos com surdez, sendo que a mesma foi aplicada mediante a presença de um intérprete da Língua de Sinais Brasileira (Libras). Os dados foram organizados, tratados, e analisados à luz da técnica de análise de conteúdo, sendo selecionados elementos como palavras e frases dotadas de significados, em seguida codificação das unidades de registro. Nesse sentido, a partir da análise dos conteúdos manifestos, emergiram 4 categorias: aprendizado durante as aulas de Educação Física; atendimento às necessidades nas aulas de Educação Física; estratégias inclusivas utilizadas nas aulas de Educação Física; e sugestões para modificações nas aulas de Educação Física. Foi relatado pela maioria dos informantes que seus professores eram preocupados com o aprendizado deles, e em contrapartida, identificou-se que a prática pedagógica de outros docentes não considerava as necessidades educacionais de seus alunos com surdez.

Energy, 2019

This paper presents a novel power block concept for flexible electricity dispatch in a Concentrat... more This paper presents a novel power block concept for flexible electricity dispatch in a Concentrating Solar Power (CSP) plant. The power block is based on intercooled e unfired regenerative closed air Brayton cycle that is connected to a pressurized solar air receiver. The Closed Brayton cycle uses a mass flow regulation system centered on the pressure regulation (auxiliary compressor and bleed valve) in order to control the Turbine Inlet Temperature (TIT). Doing so, the system is able to modulate turbine electricity production according to variations in the solar resource and changes in power electric demand. It has been found that the proposed power block is able to fully cover the electricity demand curve for those days with high solar resource. In case of integrating particles-based high temperature Thermal Energy Storage (TES) system, the power block can extend its production till the next day following the electricity curve demand during summer period. During winter period, the power plant can extend its production for a few hours due to the lower solar resource and the higher electric curve demand load.

Energy Procedia, 2018

District heating networks are commonly addressed in the literature as one of the most effective s... more District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, prolonging the investment return period. The main scope of this paper is to assess the feasibility of using the heat demand-outdoor temperature function for heat demand forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were compared with results from a dynamic heat demand model, previously developed and validated by the authors. The results showed that when only weather change is considered, the margin of error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations.

International Journal of Heat and Technology, 2017

A solar tower for a closed unfired Joule-Brayton cycle is considered. An analysis for four differ... more A solar tower for a closed unfired Joule-Brayton cycle is considered. An analysis for four different plants rated power levels is performed. The system here analyzed comprises an intercooled and regenerated gas turbine engine, a concentrating solar tower with pressurized volumetric receiver and a heat exchanger to perform cooling of the working fluid, allowing its recirculation. The plant scheme enables an output adjustment, using an auxiliary compressor. A constant value of the solar receiver outlet temperature approximately of 800 °C, without use of fuel, in a large range of power, is obtained, guaranteeing a net thermal-to-electric efficiency around 40%. Thermoflex© has been used for the thermodynamics analysis and WinDelsol for solar field design and simulation (heliostat field and receiver). For the purposes of this work, it is assumed that the plant is located in Seville, Spain, with an annual direct normal irradiation (DNI) of 2,068 kWh /m2.

Energy Procedia, 2015

A solar closed air Brayton cycle, with rated power of 50 MW, was considered. The system is compos... more A solar closed air Brayton cycle, with rated power of 50 MW, was considered. The system is composed of a concentrating solar tower with volumetric receiver, an intercooling and regenerating gas turbine and an evaporative tower cooling system. The characteristic feature of the system is a control strategy able to adjust the plant in a large range of load, maintaining net electric conversion efficiency almost constant. The concentrating solar power (CSP) plant operates without adding fuel and can heat air up to a maximum temperature of 850 °C, at the solar tower outlet. The numerical analysis was performed by SAM for the solar tower and by Thermoflex © for the assessment of the performance of the whole system. The thermal energy input was calculated on the basis of the DNI of the TMY from Seville. Results show an electricity production greater than 75GWh per year, with a significant sparing fossil fuel consumption and avoided CO 2 emissions.

British Journal of Mathematics & Computer Science, 2014

In this paper, non-Bayesian and Bayesian approaches are used to obtain point and interval estimat... more In this paper, non-Bayesian and Bayesian approaches are used to obtain point and interval estimation of the shape parameters, the reliability and the hazard rate functions of the Kumaraswamy distribution. The estimators are obtained based on generalized order statistics. The symmetric and asymmetric loss functions are considered for Bayesian estimation. Also, maximum likelihood and Bayesian prediction for a new observation are found. The results have been specialized to Type II censored data and the upper record values. Comparisons are made between Bayesian and non-Bayesian estimates via Monte Carlo simulation. Moreover, the results are applied on real hydrological data.

Emerging Infectious Diseases

International Journal of Heat and Technology, 2017

This article describes a hypothetical use in a micro solar plant of a small power tangential flow... more This article describes a hypothetical use in a micro solar plant of a small power tangential flow turbine prototype, built and tested at the Department of Mechanical, Energy and Management Engineering (DIMEG) of the University of Calabria. The turbine prototype has the ability to recover efficiently energy from small sources, better than other turbines of the same size, in a wide set of operating conditions and power operations, having the possibility to regulate the flow rate without excessive losses. The micro solar powered central unit is conceived with Parabolic Trough Collectors (PTCs): the vapor pressure analysis extends from 5 to 25 bar, while the inlet turbine temperatures considered are included in the range from 180 to 283 °C. Steam pressure at the turbine discharge has been set to 1 bar, simplifying so the plant complexity and making possible CHP generation. The solar field has been dimensioned, for each of the cases examined, in relation to the rated operating temperature and steam flow rate supplying the turbine. Finally, the last 25 bar configuration has been analyzed in more detail by extrapolating the annual energy output and the average efficiency of the overall cycle, also considering the cogeneration contribution.

International Journal of Heat and Technology, 2016

In this paper, a solar tower power plant with a closed Joule-Brayton cycle, of 5 MW rate power, w... more In this paper, a solar tower power plant with a closed Joule-Brayton cycle, of 5 MW rate power, with molten salts thermal storage, located in Seville is presented. The peculiarity of the cycle, using air like fluid work, is to vary, by an auxiliary compressor and a vent valve, the pressure, so that fluid average density, at gas turbine inlet. An adjustment of the mass flow rate, in order to regulate the exit air temperature from the receiver of concentrating solar tower, is obtained. During energy surplus production, the thermal storage energy is loaded. Particular attention is placed to the energy thermal storage, which uses molten salt KCl-MgCl2, suitable for this application due to its high melting temperature, in double tank configuration. The thermodynamic model of the entire plant was implemented using Thermoflex ® software, while, for the concentrating tower, WinDelsol software was used. Using time data relating to the locations, the performance of the entire plant, during a year, has been simulated. Preliminary results show that this plant can achieve relevant benefits in total energy production and equivalent operation hours per year, therefore it is competitive with conventional energy production systems. Furthermore, a performances estimation with a cost analysis, using a LCOE parametric analysis, has been performed.

Renewable Energy, Feb 1, 2022

Obstacles encountered in the teaching-learning process leads to launch the lack of communication ... more Obstacles encountered in the teaching-learning process leads to launch the lack of communication between teachers and students. In this case, teachers should be more varied in applying learning methods. A similar thing happened at SDN Kampung Bulak 1 Ciputat where educational games needed a tool to enhance the interest and attention of the students to support the learning process in schools, especially information technology media such as educational games in teaching and learning process to minimize the obstacles that are often encountered in the learning process.With the edugame application is expected to provide benefits and knowledge for students of SDN Kampung Bulak I Ciputat about the introduction of information technology that is not monotonous because there are interfaces created interesting and interactive so that students do not make easily saturated in learning. This application is also used as an alternative device aids in teaching. The use of information technology in teaching and learning at the same time opening the door introduction to the world of animation multimedia interactive learning for students at SDN Kampung Bulak I Ciputat. Learning by listening, reading, viewing and interacting directly help improve memory and absorption student learning in the classroom.

SSRN Electronic Journal, 2021

Energy Conversion and Management, 2021

Concentrated solar power (CSP) plants using dense particle suspension as heat transfer fluid and ... more Concentrated solar power (CSP) plants using dense particle suspension as heat transfer fluid and particles as the storage medium are considered as a promising solution to provide the high temperature required for the supercritical carbon dioxide (S-CO 2) Brayton cycle. During plant operation, variations in the heat transfer fluid temperature and ambient temperature would significantly affect system performance. Determining the suitable S-CO 2 Brayton cycle configuration for this particle-based CSP plant requires accurate prediction and comprehensive comparison on the system performance both at design and off-design conditions. This study presents a common methodology to homogeneously assess the plant performance for six 10 MW S-CO 2 Brayton cycles (i.e. simple regeneration, recompression, precompression, intercooling, partial cooling and split expansion) integrated with a hot particles thermal energy storage and a dry cooling system. This methodology includes both design and off-design detailed models based on the characteristic curves of all components. The optimal design for each thermodynamic cycle has been determined under the same boundary design constrains by a genetic algorithm. Then, their off-design performances have been quantitatively compared under varying particle inlet temperature and ambient temperature, in terms of cycle efficiency, net power output and specific work. Results show that the variation in ambient temperature contributes to a greater influence on the cycle off-design performance than typical variations of the heat transfer fluid temperature. Cycles with higher complexity have larger performance deterioration when the ambient temperature increases, though they could present higher peak efficiency and specific work at design-point. In particular, the cycle with maximum efficiency or specific work presents significant changes in different ranges of ambient temperature. This means that for the selection of the best configuration, the typical off-design operation conditions should be considered as well. For integrating with high-temperature CSP plants and dry cooling systems, the simple regeneration and the recompression cycles are the most suitable S-CO 2 Brayton cycle configurations due to their fewer performance degradations at ambient temperatures above 30 • C, which is a frequent environmental condition in sunny areas of the world.

SOLARPACES 2019: International Conference on Concentrating Solar Power and Chemical Energy Systems, 2020

This work addresses the application of concentrating solar power (CSP) using a micro gas turbine ... more This work addresses the application of concentrating solar power (CSP) using a micro gas turbine for combined heat/cooling and power (CHP) generation. This system is connected to the micro-grid of a touristic resort in Italy of 33 bungalows. Modelling efforts have been focused onto control strategy definition and components sizing in order to follow heat and power demands simultaneously with the minimum fuel consumption. Results found proved the flexibility of this concept to efficiently cover the electric and heat demand despite input fluctuations (solar radiation and ambient temperature) and output fluctuations (heat and power demand changes). The hybridized solar concept saves up to 23% of fuel compared to conventional fueled gas turbine without efficiency penalty or supplying shortage.

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems, 2019

In this work it is evaluated the performance of regenerative closed Brayton power cycle for Conce... more In this work it is evaluated the performance of regenerative closed Brayton power cycle for Concentrating Solar Power (CSP) applications. Power plant components and operation control strategy have been designed in order to fully cover electricity demand of the grid to which it is connected in Sicily (Italy). Results analysis is proving that pure solar Brayton cycle can follow electricity demand curve during most of the day through base pressure and mass flow regulation of the closed-loop and the introduction of particles-based Thermal Energy Storage (TES) system between solar receiver and turbine. Operation flexibility and non-expensive price of the working fluid (air) and storage medium (particles) make this concept very attractive for CSP applications. Detail analysis of the results is showing that the selected 20-MW power block can produce around 42 GWh per year, and when TES is included the power plant operation will increase from 3393 hours to 4640 hours, which represents an increase of 53 % working time.

SAE Technical Paper Series, 2018

A educação inclusiva é um processo social que vem se desenvolvendo em todo o mundo e direciona os... more A educação inclusiva é um processo social que vem se desenvolvendo em todo o mundo e direciona os pensamentos para a reflexão sobre a educação e o papel da escola nos tempos atuais. Este estudo objetivou apreender as representações de alunos com surdez sobre sua inclusão nas aulas de Educação Física Escolar. Trata-se de uma pesquisa qualitativa, do tipo descritiva-exploratória e analítica, realizada em duas escolas públicas de um município do interior da Bahia, Brasil. Participaram da entrevista semiestruturada 8 alunos com surdez, sendo que a mesma foi aplicada mediante a presença de um intérprete da Língua de Sinais Brasileira (Libras). Os dados foram organizados, tratados, e analisados à luz da técnica de análise de conteúdo, sendo selecionados elementos como palavras e frases dotadas de significados, em seguida codificação das unidades de registro. Nesse sentido, a partir da análise dos conteúdos manifestos, emergiram 4 categorias: aprendizado durante as aulas de Educação Física; atendimento às necessidades nas aulas de Educação Física; estratégias inclusivas utilizadas nas aulas de Educação Física; e sugestões para modificações nas aulas de Educação Física. Foi relatado pela maioria dos informantes que seus professores eram preocupados com o aprendizado deles, e em contrapartida, identificou-se que a prática pedagógica de outros docentes não considerava as necessidades educacionais de seus alunos com surdez.

Energy, 2019

This paper presents a novel power block concept for flexible electricity dispatch in a Concentrat... more This paper presents a novel power block concept for flexible electricity dispatch in a Concentrating Solar Power (CSP) plant. The power block is based on intercooled e unfired regenerative closed air Brayton cycle that is connected to a pressurized solar air receiver. The Closed Brayton cycle uses a mass flow regulation system centered on the pressure regulation (auxiliary compressor and bleed valve) in order to control the Turbine Inlet Temperature (TIT). Doing so, the system is able to modulate turbine electricity production according to variations in the solar resource and changes in power electric demand. It has been found that the proposed power block is able to fully cover the electricity demand curve for those days with high solar resource. In case of integrating particles-based high temperature Thermal Energy Storage (TES) system, the power block can extend its production till the next day following the electricity curve demand during summer period. During winter period, the power plant can extend its production for a few hours due to the lower solar resource and the higher electric curve demand load.

Energy Procedia, 2018

District heating networks are commonly addressed in the literature as one of the most effective s... more District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, prolonging the investment return period. The main scope of this paper is to assess the feasibility of using the heat demand-outdoor temperature function for heat demand forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were compared with results from a dynamic heat demand model, previously developed and validated by the authors. The results showed that when only weather change is considered, the margin of error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations.

International Journal of Heat and Technology, 2017

A solar tower for a closed unfired Joule-Brayton cycle is considered. An analysis for four differ... more A solar tower for a closed unfired Joule-Brayton cycle is considered. An analysis for four different plants rated power levels is performed. The system here analyzed comprises an intercooled and regenerated gas turbine engine, a concentrating solar tower with pressurized volumetric receiver and a heat exchanger to perform cooling of the working fluid, allowing its recirculation. The plant scheme enables an output adjustment, using an auxiliary compressor. A constant value of the solar receiver outlet temperature approximately of 800 °C, without use of fuel, in a large range of power, is obtained, guaranteeing a net thermal-to-electric efficiency around 40%. Thermoflex© has been used for the thermodynamics analysis and WinDelsol for solar field design and simulation (heliostat field and receiver). For the purposes of this work, it is assumed that the plant is located in Seville, Spain, with an annual direct normal irradiation (DNI) of 2,068 kWh /m2.

Energy Procedia, 2015

A solar closed air Brayton cycle, with rated power of 50 MW, was considered. The system is compos... more A solar closed air Brayton cycle, with rated power of 50 MW, was considered. The system is composed of a concentrating solar tower with volumetric receiver, an intercooling and regenerating gas turbine and an evaporative tower cooling system. The characteristic feature of the system is a control strategy able to adjust the plant in a large range of load, maintaining net electric conversion efficiency almost constant. The concentrating solar power (CSP) plant operates without adding fuel and can heat air up to a maximum temperature of 850 °C, at the solar tower outlet. The numerical analysis was performed by SAM for the solar tower and by Thermoflex © for the assessment of the performance of the whole system. The thermal energy input was calculated on the basis of the DNI of the TMY from Seville. Results show an electricity production greater than 75GWh per year, with a significant sparing fossil fuel consumption and avoided CO 2 emissions.

British Journal of Mathematics & Computer Science, 2014

In this paper, non-Bayesian and Bayesian approaches are used to obtain point and interval estimat... more In this paper, non-Bayesian and Bayesian approaches are used to obtain point and interval estimation of the shape parameters, the reliability and the hazard rate functions of the Kumaraswamy distribution. The estimators are obtained based on generalized order statistics. The symmetric and asymmetric loss functions are considered for Bayesian estimation. Also, maximum likelihood and Bayesian prediction for a new observation are found. The results have been specialized to Type II censored data and the upper record values. Comparisons are made between Bayesian and non-Bayesian estimates via Monte Carlo simulation. Moreover, the results are applied on real hydrological data.

Emerging Infectious Diseases

International Journal of Heat and Technology, 2017

This article describes a hypothetical use in a micro solar plant of a small power tangential flow... more This article describes a hypothetical use in a micro solar plant of a small power tangential flow turbine prototype, built and tested at the Department of Mechanical, Energy and Management Engineering (DIMEG) of the University of Calabria. The turbine prototype has the ability to recover efficiently energy from small sources, better than other turbines of the same size, in a wide set of operating conditions and power operations, having the possibility to regulate the flow rate without excessive losses. The micro solar powered central unit is conceived with Parabolic Trough Collectors (PTCs): the vapor pressure analysis extends from 5 to 25 bar, while the inlet turbine temperatures considered are included in the range from 180 to 283 °C. Steam pressure at the turbine discharge has been set to 1 bar, simplifying so the plant complexity and making possible CHP generation. The solar field has been dimensioned, for each of the cases examined, in relation to the rated operating temperature and steam flow rate supplying the turbine. Finally, the last 25 bar configuration has been analyzed in more detail by extrapolating the annual energy output and the average efficiency of the overall cycle, also considering the cogeneration contribution.