Description

​

The HySupply Ammonia Analysis Tool is a Microsoft Excel Workbook developed to model and cost ammonia production via the Haber-Bosch process, using renewable energy (solar PV and wind) as a key power source and green hydrogen from an electrolyser. The tool extends beyond current state-of-the-art models, by providing the user the complete freedom to define their desired plant capacities and design a wide variety of configurations to integrate the renewable energy power source, dispatchable balancing power (e.g., battery), electrolyser and ammonia production process. Solar and wind traces for various locations around Australia are preloaded into the model but the user has the option to upload their own trace data which allows the tool to be used to assess green ammonia production in any location around the world. The hourly resolution of the solar and wind trace data is used to model the entire process from hydrogen generation via electrolysis through to ammonia production from the Haber-Bosch process. The tool also considers generally under-explored electrolyser and power plant operating factors such as variation of electrolyser efficiency with load, electrolyser/power plant efficiency degradation with operating life, and using hydrogen storage as a buffer to maintain reliable operation. Furthermore, the tool integrates several types of balancing technology (battery, gas turbine and grid power) which is used to provide dispatchable power to maintain system reliability when the renewable power generation is insufficient to meet the power demand. 

​

A subsequent cost model then establishes the capital and operating costs associated with generating the ammonia, which is then used to estimate the levelised cost of ammonia through a discounted net present value analysis. Complete user control also extends to these features, allowing for their own project-specific cost assumptions. These include options for the user to set their own electrolyser and power plant system cost, with additional opportunities to explore economies of scale. These costs are then complemented with options to include additional costs or include engineering, procurement, and construction (EPC) and land development cost.