conversion_plus creating non output carrier? related to the carrier_out name about calliope HOT 3 CLOSED

In another model, I use the 2 carriers "heat" and "district_heat".
This "large_Gas_Boiler" is providing "heat" instead of "district_heat":

  large_Gas_Boiler:
    carrier_in: gas
    carrier_out:
      district_heat: 0.9
    constraints:
      e_cap.max: .inf
    costs:
      monetary:
        e_cap: 6100000.0
        om_fixed: 109800.0
    depreciation:
      plant_life: 21.0
    name: Gas Boiler
    parent: conversion_plus
    primary_carrier: district_heat

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Thanks for this Arnaud. It was being caused by a in constraint generation:

carriers_out = model.get_carrier(y, 'out', all_carriers=True)
            if c not in carriers_out:
                return c_prod == 0
            if c in carriers_out and model._locations.at[x, y] == 0:
                return c_prod == 0

In the examples you give, with only one carrier out, model.get_carrier returns a string e.g. district_heat. So the carrier heat would be flagged as being "in" district_heat. If there were multiple output carriers, e.g. district_heat and power, model.get_carrier would return a tuple (power, district_heat), and heat would not be flagged as "in" this.

Conversion plus has quite a few quirks, I'll see if this can be resolved easily and then aim to fix it. If it causes issues downstream then it could take me a bit longer to sort.

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Fixed in commit cc9536c

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