Ingenieurwissenschaften und zugeordnete Tätigkeiten
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- Energy efficiency (1)
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- GMA welding (1)
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This paper investigates GMAW with respect to energy consumption and its associated environmental impacts. Different material transfer modes and power levels for Single Wire GMAW (SGMAW) and Tandem GMAW (TG-MAW) are evaluated by means of the indicator Electrical Deposition Efficiency. Furthermore, the wall-plug efficiency of the equipment is measured in order to describe the total energy consumption from the grid. The results show that energy efficiency is highly affected by the respective process and can be significantly enhanced by a TGMAW process. The wall-plug efficiency of the equipment shows no significant dependency on the power range or the material transfer mode. Moreover, the method of Life Cycle Assessment (LCA) is adopted in order to investigate the influences of energy efficient welding on the environmental impacts. In the comparative LCA study, the demand of electrical energy is reduced up to 24%. In consequence, the indicator values for GlobalWarming Potential (100), Acidification Potential, Eutrophication Potential and Photochemical Ozone Creation Potential that are applied to express the environmental impacts are reduced up to 11%.
Single wire Gas Metal Arc Welding (SGMAW) and high power Tandem GMAW (TGMAW) are evaluated with respect to energy efficiency. The key performance indicator Electrical Deposition Efficiency is applied to reflect the energy efficiency of GMAW in different material transfer modes. Additionally, the wall-plug efficiency of the equipment is determined in order to identify the overall energy consumption. The results show that energy efficiency as well as economic process performance can be significantly increased by application of tandem processes. A comparative Life Cycle Assessment of a 30 mm thick weld is conducted to investigate the influences of the energy efficiency on the environmental impacts. Environmental burdens in the categories Global Warming Potential, Acidification Potential, Eutrophication Potential and Photochemical Ozone Creation Potential can be reduced up to 11% using an energy efficient TGMAW process