Power to Gas : Background & techno-economic scenario analysis at Söderåsen Biogas plant
Abstract: Power to gas is an emerging energy storage technology with great versatility. This thesis investigates the economic prospects of investing in such a facility via a case study linked to the Söderåren biogas plant in southern Sweden.The basis for this study is cash flow scenario analysis based on revenues and costs, which are referred as scenario parameters. Each of these parameters have different options to choose from, with nominal values chosen as the most likely options for each scenario parameter. In current market condition it was observed that installing power to gas is not profitable. However after exploring numerous combinations of scenarios, it was found that the electrical grid fee charges and higher ancillary service income was critical to achieve a viable business case for power to gas. Another scenario achieved profitability with a small margin which occurred when the grid fee was removed, referred as “grid fee off”. Both the most likely scenario and grid fee off scenario included sensitivity analysis. This was used to observe the impact of net present value when changing one parameter at a time.
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