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我想确定 Brightway 的一项活动对空气的排放，但探索这让我想到了一个更普遍的问题。在实施影响评估方法时是否考虑了分区和子分区？

原则上，排放因子取决于隔间，例如向水或空气中排放甲醛是不一样的。以影响 2002 端点人体健康方法为例。根据 ecoinvent LCIA implementation_3.3提供的电子表格，CF 在空气中高出 3 个数量级。如果我在 Brightway 中以相同的方法检查实现：

m_name=[m for m in bw.methods if '2002' in str(m) 
    and 'human toxicity' in str(m)][0]

m=bw.Method(m_name)

# Generate the dictionary using a comprehension:
m_dict = {bw.get_activity(ef[0])['name']:ef[1] for ef in m.load()}

# put the whole thing in a neat Pandas series
m_series=pd.Series(m_dict,
      name="{}, {}".format(m.name, m.metadata['unit']))

m_series[m_series.index.str.contains('Formaldehyde')]

我只找到与排放到水相对应的值，但没有关于隔间/子隔间的信息。我错过了什么？

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1 回答 1

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对于哪些元数据应该与 Brightway2 中的生物圈流（或任何节点）相关联没有任何实际要求，但密钥categories填充在默认元数据中：

In [1]: import brightway2 as bw

In [2]: for flow in bw.Database("biosphere3"):
   ...:     if 'formaldehyde' in flow['name'].lower():
   ...:         print(flow['name'], flow['categories'])
   ...:
Formaldehyde ('water',)
Formaldehyde ('air', 'lower stratosphere + upper troposphere')
Formaldehyde ('water', 'ocean')
Formaldehyde ('water', 'surface water')
Formaldehyde ('water', 'ground-')
Formaldehyde ('air', 'low population density, long-term')
Formaldehyde ('water', 'ground-, long-term')
Formaldehyde ('air', 'urban air close to ground')
Formaldehyde ('air',)
Formaldehyde ('air', 'non-urban air or from high stacks')

排放到空气和水中的特征在于('IMPACT 2002+ (Endpoint)', 'human health', 'total')：

In [3]: name = ('IMPACT 2002+ (Endpoint)', 'human health', 'total')

In [4]: for key, cf in bw.Method(name).load():
   ...:     flow = bw.get_activity(key)
   ...:     if 'formaldehyde' in flow['name'].lower():
   ...:         print(flow, cf)
   ...:
'Formaldehyde' (kilogram, None, ('air', 'low population density, long-term')) 0.00180414
'Formaldehyde' (kilogram, None, ('air', 'non-urban air or from high stacks')) 0.00180414
'Formaldehyde' (kilogram, None, ('air',)) 0.00180414
'Formaldehyde' (kilogram, None, ('air', 'urban air close to ground')) 0.00180414
'Formaldehyde' (kilogram, None, ('water', 'surface water')) 8.1879e-06
'Formaldehyde' (kilogram, None, ('water',)) 8.1879e-06
于 2017-11-23T21:53:02.650 回答