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In this work, we describe the design and test of a new piece of equipment, developed in order to enhance speed, gas consumption and safety during the manual asphalt roofing process. The novelty of the equipment is based on the use of a set of five parallel gas burners located in front of the roll to maximize heat transfer. The equipment is light and can be used by any worker on any type of roof. It also includes a thermal insulation cover to significantly reduce gas consumption and, thus, to reduce CO2, SO2, and other non-eco-friendly emissions. In this paper, we present the mechanical and thermal design and analysis of the equipment, Computer Fluid Dynamics (CFD) simulations for heat transfer calculation, a description of the manufacturing and assembly, a preliminary thermal test, and an operational test. The results demonstrate an installation speed of 1.75 m2/min, for 3 kg/m2 rolls, which translates to around 700–735 m2 per person per day, more than twice the usual manual roofing rate. Nevertheless, some issues need to be resolved, such as the nonuniform heat distribution and the low heat transfer at the end of the roll installation.
Alberto Barragán-García; Miguel Fernández-Muñoz; Efrén Díez-Jiménez. Lightweight Equipment Using Multiple Torches for Fast Speed Asphalt Roofing. Energies 2020, 13, 2216 .
AMA StyleAlberto Barragán-García, Miguel Fernández-Muñoz, Efrén Díez-Jiménez. Lightweight Equipment Using Multiple Torches for Fast Speed Asphalt Roofing. Energies. 2020; 13 (9):2216.
Chicago/Turabian StyleAlberto Barragán-García; Miguel Fernández-Muñoz; Efrén Díez-Jiménez. 2020. "Lightweight Equipment Using Multiple Torches for Fast Speed Asphalt Roofing." Energies 13, no. 9: 2216.
We present an innovative personal rapid transit technology compatible with current metro infrastructures, named OPTIMOTUS. The key of this technology is that passengers can travel without stops, thus multiplying several times the effective travel speed. In metro lines with shorter separation between stations (< 1000 m) and for long travels (> 5 stations), passengers travel speed could be up to 3.5 times faster with OPTIMOTUS than with conventional metro trains. In addition, its implementation costs would be relatively low since the vehicles are designed to be compatible with current metro railways. However, there are still many open issues to be engineered before claiming the full viability of the technology.
Efren Diez-Jimenez; Miguel Fernandez-Munoz; Ruben Oliva-Dominguez; David Fernandez-Llorca; Miguel Angel Sotelo. Personal Rapid Transport System Compatible With Current Railways and Metros Infrastructure. IEEE Transactions on Intelligent Transportation Systems 2020, 22, 2891 -2901.
AMA StyleEfren Diez-Jimenez, Miguel Fernandez-Munoz, Ruben Oliva-Dominguez, David Fernandez-Llorca, Miguel Angel Sotelo. Personal Rapid Transport System Compatible With Current Railways and Metros Infrastructure. IEEE Transactions on Intelligent Transportation Systems. 2020; 22 (5):2891-2901.
Chicago/Turabian StyleEfren Diez-Jimenez; Miguel Fernandez-Munoz; Ruben Oliva-Dominguez; David Fernandez-Llorca; Miguel Angel Sotelo. 2020. "Personal Rapid Transport System Compatible With Current Railways and Metros Infrastructure." IEEE Transactions on Intelligent Transportation Systems 22, no. 5: 2891-2901.
A prototype for mechanizing the asphalt roofing process was developed. In this manuscript, we present the design, manufacturing, preliminary thermal test, and operation test of the equipment. The innovation is sustained by the use of infrared radiators instead of fuel burners. Infrared heaters provide optimal clean heat transfer to asphalt rolls in comparison to fuel burner automated systems since the latter generates a significant amount of CO2, SO2, and other non-ecofriendly emissions close to workers. Moreover, the equipment has several advantages with respect to manual installation, such as roofing capacity, cleanness, safety, uniformity, and environment-friendliness. It demonstrates an installation speed of 1 m/min, on average, for 3 kg/m2 rolls, which leads to around 400–420 m2 per person a day, more than the usual manual roofing rate. However, there are some issues that need to be resolved, such as inaccurate unrolling and/or bad adhesion gaps.
Efrén Díez-Jiménez; Alberto Vidal-Sánchez; Alberto Barragán-García; Miguel Fernández Muñoz; Ricardo Mallol-Poyato. Lightweight Equipment for the Fast Installation of Asphalt Roofing Based on Infrared Heaters. Energies 2019, 12, 4253 .
AMA StyleEfrén Díez-Jiménez, Alberto Vidal-Sánchez, Alberto Barragán-García, Miguel Fernández Muñoz, Ricardo Mallol-Poyato. Lightweight Equipment for the Fast Installation of Asphalt Roofing Based on Infrared Heaters. Energies. 2019; 12 (22):4253.
Chicago/Turabian StyleEfrén Díez-Jiménez; Alberto Vidal-Sánchez; Alberto Barragán-García; Miguel Fernández Muñoz; Ricardo Mallol-Poyato. 2019. "Lightweight Equipment for the Fast Installation of Asphalt Roofing Based on Infrared Heaters." Energies 12, no. 22: 4253.