||The aim of this M.Sc. thesis is to perform a Life Cycle Assessment (LCA) on the Hydraulic motor type OMV/W-800 manufactured by the international company called Sauer-Danfoss.
In response to Sauer-Danfoss environmental standards, the HD-MD department has decided to make an evaluation performance of the environment throughout the entire lifespan of the hydraulic motor OMV/W-800. The project is made under the supervision of Sauer-Danfoss and the Department of Manufacturing Engineering and Management (Institut for Produktion og Ledelse IPL) at Denmarks Technical University (DTU).
The data collection is based on Sauer-Danfoss real situation by making interviews with designing, purchasing and exporting departments, production department (workers), distributors and end users.
The goal of this study is to perform a cradle-to-grave Life Cycle Assessment (LCA) on the hydraulic motor OMV/W-800, and to assess the potential impacts, including resource consumptions and environmental impact potentials throughout the entire lifespan of the hydraulic motor OMV/W-800 by means of a literature survey, Sauer-Danfoss literature and data, and other information sources by adopting the LCA (Life Cycle Assessment) methodology as a tool. Furthermore the goal is to carry out a complete quantitative analysis on the products processes and materials, and identifying and evaluating the most promising options for improving the product systems with respect to environmental quality and resource efficiency.
The goal of the study is defined in detail. The scope definition concerns defining how the study is to be performed, e.g. how the function of the system is defined, what part of the system should be included or excluded, which parameters should be evaluated, how the study should be validated etc.
The inventory analysis is the phase where all the needed data (on inputs and outputs from material, energy, disposal processes, use stage and transportation) are collected, and this data derives primarily from Sauer- Danfoss. Data collected in the inventory part is a mixture of actual measurements, calculations, literature data and estimates
To accomplish the goal, the potential impacts on the environment and the resource consumptions of the hydraulic product system are assessed by means of a literature survey and the EDIP computer tool. In general, the impact assessment aims to evaluate the contribution of the intervention to different environmental impact categories, e.g. global warming, eco-toxicity, toxicity to human, persistent toxicity, acidification, nutrient enrichment, hazardous waste, slag and ash etc. Based on the results from the EDIP PC Tool, it is determined that the main impacts of the hydraulic product system are the contributions to persistent toxicity, human toxicity, eco-toxicity, global warming, acidification, photochemical ozone formation and nutrient enrichment. The most significant potentials for global warming, acidification, nutrient enrichment, photochemical ozone formation and human toxicity, mainly derive from the combustion of oil (gasoline energy consumption) in the use stage, which can be improved by improving the efficiency of the hydraulic motor. Cast iron and steel raw materials production processes affect persistent toxicity impact potential categories due to the emission of heavy metals to the environment, and waste impact potential categories. Eco-toxicity mainly derives from the ancillary substances and raw materials preparation processes. Raw material, manufacturing and use stages are found to be significant in energy related resource consumption i.e. coal, crude oil, natural gas, which can be improved by adopting new technology in the raw materials production and manufacturing processes (Sauer-Danfoss), and increasing hydraulic motor efficiency. Material related resource consumptions of nickel and molybdenum are due to the use of raw materials in the form of high quality steel. In order to reduce the consumption of nickel and molybdenum, the recycling methodology and material replacement can improve resource consumptions in the hydraulic product system. Hydraulic oil in the use stage and disposal stage contributes significantly to the environmental impact potentials and crude oil resources, which can be reduced by optimized solutions for replacing the quality and quantity of the hydraulic oil, and by recycling hydraulic oils after use. The impact potentials for waste categories mainly derive from the raw material production processes, which can be reduced by optimized solutions for recycling the raw materials wastes in the others products e.g. cement product etc.
Finally, the life span and efficiency of the motor are the most significant, but not unambiguous parameters. By increasing/decreasing the life span of the hydraulic motor, the environmental impact potentials and energy related resource consumptions increase/decreasing in the product system. Improvement in the efficiency of the hydraulic motor decreases the environmental impact potentials and energy related resource consumptions significantly in the product system. The only way to make an improvement is to increase the motor efficiency thereby decreasing the environmental impact potentials and energy related resources significantly.