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Details

  • Name

    Sérgio Pires Leitão
  • Cluster

    Power and Energy
  • Role

    Affiliated Researcher
  • Since

    01st January 2014
Publications

2017

Energetic System with Biomass and How to Mitigate Associated

Authors
Nabais, AS; Galvao, JR; Ascenso, RMT; Leitao, SA;

Publication
2017 6TH INTERNATIONAL YOUTH CONFERENCE ON ENERGY (IYCE)

Abstract
In this work we present a greenhouse case study with a new energy model based on a Biomass energy source, once it is a more profitable and sustainable energy system, but demands special safety measures. Biomass has some dangerous aspects along the process from transport, to storage until its' use. The paper foccus on safety for equipment operation, storage of biofuels, the design of the facilities and health of the employees, in a context of primary renewable energy source of greenhouses farming systems, for intensive cultivation of flowers and vegetables for human consumption. Similarly, exposure to biologically active material (mustiness and spores) may constitute a danger to the health of those involved in handling biomass. These properties and their use determine safety conditions in handling and storage. This energy model is constituted with several proposals, both technological and energy alternatives/renewable energy, to meet the needs of electric power and heat, with the objective of increasing the competitiveness in agricultural greenhouses, in the management, financial and environmental aspects. The model was developed with the purpose of improving efficiency and sustainability, with the inclusion of sensors that allow controlling the various components of a greenhouse, with the perspective of a quick distribution in the market, increasing the economic benefits and supported on efficient and intelligent management systems energy.

2017

Energy system retrofit in a public services building

Authors
Galvao, JR; Moreira, L; Gaspar, G; Vindeirinho, S; Leitao, S;

Publication
MANAGEMENT OF ENVIRONMENTAL QUALITY

Abstract
Purpose - Taking into account the current relevance of the concept of smart city connected with the Internet of Things, this work aims to study the implementation of this concept by applying a new energy model in an existing public building. The purpose of this paper is to enhance the sustainability and energy autonomy of the building. Design/methodology/approach - The building referred to in the case study is a library, and simulations related to the ongoing study are based on an energy audit, comprising a survey on electrical and thermal energy consumption. The innovative proposed model consists of a mix of energy production processes based on photovoltaic panels and biomass boilers. Economic analysis of the energy model has already yielded some results regarding the payback on investment, as well as avoided emissions in the context of development of a low-carbon economy with avoided emissions and socioeconomic advantages. Findings - It is possible to enhance the sustainability of the library studied by the retrofit of the current energy system. With the integration of photovoltaic panels and the conversion or replacement of boilers from natural gas to biomass, the GHG emissions could drop around 121 t CO2 per year. Another benefit would be the inclusion of endogenous resources over imported energy resources. The payback period for the measures proposed ranges from 2.5 to 8 years, proving that the increase in environmental sustainability is viable. Originality/value - The intention here is to implement the concept of smart city, in more sustainable buildings, bringing them to the lowest possible energy consumption levels, hence increasing performance and comfort. Also, taking into account that the energy-consuming buildings are already constructed, it is urgent to reconvert them to lower the use of energy and emissions using technologies based on renewable energy, boosting the use of local resources.

2016

Greenhouse with sustainable energy for IOT

Authors
Oliveira, FT; Leitao, SA; Nabais, AS; Ascenso, RM; Galvao, JR;

Publication
IFIP Advances in Information and Communication Technology

Abstract
In order to support the intensive development of agricultural crops and, in particular the floricultural inside a greenhouse, with the perspective of a quick distribution in the market, increasing the economic benefits and supported on efficient and intelligent management systems energy, it is mandatory to conceive a model based on Cyber-Physical Systems (CPS) This implies, accordingly, increases in renewable primary energy sources utilization coupled with sensing technologies, include developments on Internet of Things (IoT) and Cloud Computing (CC), supported with Information and Communication Technologies (ICT) that will lead to new architectural approach applied to a proposed energy system, based on a sustainable and more engineering autonomous process. This work comes up with a new energy model that retrofits the system of a greenhouse supported with multiple sensors in one grid, to expand into CPS concept to manage sensors and controllers that will improve a profitable energy system. © IFIP International Federation for Information Processing 2016.

2014

Analysis of Power Quality Disturbances in Industry in the Centre Region of Portugal

Authors
Moreira, L; Leitao, S; Vale, Z; Galvao, J; Marques, P;

Publication
TECHNOLOGICAL INNOVATION FOR COLLECTIVE AWARENESS SYSTEMS

Abstract
Power quality issues have taken a more prominent role in power systems over the last years. These issues are of major concern for energy customers, primarily for customers with a widespread use of electronic devices in their manufacturing processes. Even though the quality of service is increasing, customers are becoming more demanding of the energy provider. This research aims to provide some industrial managers the technical support in deciding of investments in the mitigation of power quality disturbances, such as the use of less sensitive devices or the use of interface devices (UPS, DVR ...) In order to recommend an appropriate solution, the problem is characterized. The technical and economic influences of the PQ disturbances in the manufacturing processes are assessed resorting to power quality audits in the customer facilities. This research covered a significant number of facilities in several industrial activities.

2013

Sustainable Energy for Plastic Industry Plant

Authors
Galvao, J; Moreira, L; Leitao, S; Silva, E; Neto, M;

Publication
2013 4TH INTERNATIONAL YOUTH CONFERENCE ON ENERGY (IYCE)

Abstract
This research intends to reduce energy consumption in a plastic film industrial unit. Trough the development of a new energy model focused on self renewable energy production and energy management in some sectors, such as lighting and compressed air. It is expected that this model leads to energy savings with environmental advantages (lower greenhouse gases emission). This may grant access to eco-sustainable certifications/awards as a factor of competitiveness, as well as economic benefits. The methodology followed to design the new energy model was developed from an energy audit to characterize the existing consumptions and use of energy.

Supervised
thesis

2017

Implementação de soluções de eficiência energetica em contexto real

Author
Marta Amélia Antunes da Cruz

Institution
UTAD

2017

Métodos de diagnóstico e avaliação do processo de impregnação de estatores de Motores de Indução Trifásicos

Author
Rafael Henriques Fonseca Vieira Pratas

Institution
UTAD

2017

Avaliação do potencial solar fotovoltaico e dimensionamento de um parque em Cabo Verde - Ilha de Santiago

Author
Erikson Silva Pereira

Institution
UTAD

2017

Estimativa do Potencial de Produção de Energia Elétrica através de Sistemas Fotovoltaicos Flutuantes em Pedreiras: Estudo de Caso da Região do Alto Tâmega

Author
Sara Isabel Pinto Martins

Institution
UTAD

2017

Otimização da eficiência energética em edifícios de serviços e comércio

Author
André Carvalhais Teixeira

Institution
UTAD