Consultation about TEA and LCA settings of boiler stream

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Hello, may I ask you some questions about the TEA and LCA settings of boiler stream? Thanks for your help.

I use code CHP_sys = create_coheat_and_power_system(combustible_slurries=stream_a, combustible_gases= stream_b, mockup=True) to create boiler.

a) Could I consult you how to set the price of boiler inlet stream boiler_chemicals stream and boiler outlet stream ash stream, emissions stream, blowdown stream (no wastewater treatment process is built in my process)? b) For boiler inlet stream boiler_chemicals stream and boiler outlet stream ash stream, emissions stream, blowdown stream (no wastewater treatment process is built in my process), could I consult you how to set the characterization factor of them when executing LCA? c) Could I consult you why is the composition of boiler inlet stream boiler_chemicals stream ash?