| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 4.78 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
Este estágio curricular foi desenvolvido na empresa Preh Portugal, empresa que
comercializa maioritariamente componentes eletrónicos para a indústria automóvel. O
objetivo deste trabalho foi o estudo da eficiência energética de uma máquina de injeção,
bem como a implementação de medidas, de modo a minimizar os consumos energéticos
da empresa.
Assim sendo, inicialmente foi realizado um levantamento energético da secção de
injeção da empresa, de maneira a detalhar quais os principais consumidores de energia
elétrica neste setor. Seguiu-se um estudo dos consumos atuais das máquinas de injeção
piloto, bem como a avaliação da potência térmica perdida pelos equipamentos. Procedeuse
também à escolha dos melhores materiais para isolamento, bem como dos possíveis
fornecedores de mantas isolantes feitas por medida. Depois de implementado o isolamento
térmico, foi realizado um novo estudo dos consumos energéticos dessa mesma máquina,
bem como a verificação da redução da potência térmica. Em paralelo foi realizado um
estudo teórico da variação da potência térmica dissipada em função da espessura do
isolante.
De modo a avaliar a situação atual da empresa, foram escolhidas duas máquinas piloto
para se realizar este estudo (DEMAG 29 e ENGEL 26). Assim sendo, relativamente à
potência térmica, na máquina 29 estavam a ser dissipados 662,8 W, no que diz respeito à
máquina 26 essas perdas tomaram o valor de 978,1 W. Para valores de consumos médios
de energia por parte das resistências térmicas, para a máquina 29 e 26, estes foram de
95,1 e 98,1 kW.h, respetivamente. Após a colocação das mantas isolantes na máquina 29,
a potência térmica dissipada passou a ser de 362,6 W, relativamente ao consumo de
energia pelas resistências de aquecimento, este reduziu 20,2%.
Com a realização desta dissertação pode-se concluir que a colocação de mantas
térmicas isolantes é bastante vantajosa, devido ao facto de reduzir a potência térmica
dissipada, bem como a energia elétrica consumida, num valor de, aproximadamente,
530€/anuais.
This internship was developed in Preh Portugal, a company that mainly markets electronic components for the automotive industry. The objective of this work was to study the energy efficiency of an injection machine, as well as the implementation of measures to minimize the energy consumption of the company in general. An energy survey of the company's injection section was conducted initially, in order to identify the main consumers of electricity in this sector. This was followed by a study of the current energy consumption of the pilot injection machines, and an evaluation of the thermal power lost by the equipment. We then proceeded to choose the best materials for insulation, and the identification of possible suppliers of made to measure insulating blankets. After the thermal insulation had been deployed a new study of the energy consumption for the same machine was performed, while also verifying the reduction in thermal power. At the same time a theoretical study of the variation in the dissipated thermal power, as a function of the thickness of the insulator, was also performed. In order to assess the current situation of the company, two pilot machines were chosen to carry out this study (DEMAG 29 and ENGEL 26). With regard to thermal power, machine 29 was dissipating 662.8 W, while machine 26 was dissipating a total of 978.1 W. The average energy consumption of the thermistors for machines 29 and 26 were 95.1 and 98.1 kW.h respectively. After putting the insulating blankets onto machine 29, the dissipated thermal power decreased to 362.6 W, with a corresponding decrease of 20.2% in relation to the energy consumption of the heating elements. With the completion of this work it may be concluded that the installation of insulating thermal blankets is particularly advantageous, due to the fact that the reduction in dissipated thermal power, and corresponding reduction in energy consumption results in an estimated saving of € 530 / year.
This internship was developed in Preh Portugal, a company that mainly markets electronic components for the automotive industry. The objective of this work was to study the energy efficiency of an injection machine, as well as the implementation of measures to minimize the energy consumption of the company in general. An energy survey of the company's injection section was conducted initially, in order to identify the main consumers of electricity in this sector. This was followed by a study of the current energy consumption of the pilot injection machines, and an evaluation of the thermal power lost by the equipment. We then proceeded to choose the best materials for insulation, and the identification of possible suppliers of made to measure insulating blankets. After the thermal insulation had been deployed a new study of the energy consumption for the same machine was performed, while also verifying the reduction in thermal power. At the same time a theoretical study of the variation in the dissipated thermal power, as a function of the thickness of the insulator, was also performed. In order to assess the current situation of the company, two pilot machines were chosen to carry out this study (DEMAG 29 and ENGEL 26). With regard to thermal power, machine 29 was dissipating 662.8 W, while machine 26 was dissipating a total of 978.1 W. The average energy consumption of the thermistors for machines 29 and 26 were 95.1 and 98.1 kW.h respectively. After putting the insulating blankets onto machine 29, the dissipated thermal power decreased to 362.6 W, with a corresponding decrease of 20.2% in relation to the energy consumption of the heating elements. With the completion of this work it may be concluded that the installation of insulating thermal blankets is particularly advantageous, due to the fact that the reduction in dissipated thermal power, and corresponding reduction in energy consumption results in an estimated saving of € 530 / year.
Description
Keywords
Potência térmica dissipada Consumo de energia Isolamento térmico Máquina de injeção Thermal power dissipation Energy consumption Thermal insulation Injection machine