PRRE6005: Life Cycle Management - Engineering Assignment Help

Assignment Task:

Task 1: 

Define a functional unit for this abridged LCA, goal and scope. 

Task 2: 

Conduct the Life Cycle Inventory Analysis for the production and combustion of 1 GJ of biodiesel, resulting in a listing of all inputs over the different stages of the product life cycle.[please note that you need to draw a flow diagram consisting of 3 stages as stated above. For each stage, you need to calculate the inputs, which are required to produce the main output (e.g. canola oil) of this stage. Inputs are in the form of energy (e.g. electricity) and material (e.g. chemicals). The main output from the previous stage is an input for the following stage. The last stage is the stage that produces and combust biodiesel and so the final output is biodiesel. [Please include transportation in between stages, where appropriate.]

Task 3: 

Calculate the life cycle global warming impact of 1 GJ of biodiesel combustion. [Firstly, you need to multiply the amount of inputs in the inventory by the emission factors. There are three types of greenhouse gases, including CO2, CH4 and N2O. Therefore you will have up to three emission factors for each input. Table 2 shows the emission factors for all inputs mentioned in this problem. Once you have calculated CO2, CH4 and N2O for all inputs, then convert CH4 and N2O to the equivalent amount of CO2 (i.e. kg CO2 e-) by multiplying the amount of CH4 by 28 and N2O by 265. For example, 2 kg of CH4 means 42 kg CO2 e- and 1.5 kg of N2O means 465 kg CO2 e-. Finally, you calculate all CO2s to find the life cycle GHG emissions due to production and combustion of 1GJ of biodiesel.] 

Task 4: 

Determine GHG emissions separately for the three stages and draw a bar diagram showing which stage is the hotspot (causing the most GHG emissions). Thereafter, draw a pie diagram, showing the percentage contribution of inputs and outputs to GHG emissions during the life cycle of 1 GJ of diesel combustion. 

Task 5 

Rank the inputs and outputs in terms of their contribution to GHG emissions. The inputs and outputs causing the most significant emissions are considered as ‘hotspots’. Review the literature to highlight some mitigation strategies that can potentially be applied to these hotspots to further reduce the overall GHG emissions from biodiesel production. The emission factors for the mitigation strategies need to be obtained from currently available literature in order to do a follow-up LCA to estimate the revised GHG emissions. 

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