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欧州の木質バイオマス利用は熱が主体、しかし日本では。

木質バイオマス利用では欧州各国の取組が先進事例としてよく取り上げられます。欧州でも日本でも、「熱電併給」(CHP;Combined Heat & Power)が木質バイオマス利用の効率良い利用方法であることは同じです。ただ、留意しておかなくてはいけない点があります。欧州と日本の緯度の違いによる”熱利用”ニーズニーズの違いです。

下図で見るように、欧州は日本よりも高緯度にあり寒冷地に位置する位置するので、”熱利用”ニーズは高いと言えます。一方、日本は緯度で見ると南欧に相当します。九州・四国・九州はアフリカ大陸北部北部に相当します。

またエネルギー運搬に伴う減損率を考えると、熱エネルギーを供給できる距離・地域は狭い範囲に限られてきます。これらを考え合わせると、日本における「熱電併給」木質バイオマス発電事業では、熱利用に頼りすぎることなく、電力事業で安定した事業採算が取れるかどうかが鍵になります。。




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木質バイオマス発電は「魔法の杖」ではない

NPO法人バイオマス産業社会ネットワークの泊みゆき理事長が、2014年にバイオマス白書に掲載した記事のタイトルです。 記事のポイントは、”日本で未利用材などを燃焼させる木質バイオマス発電の計画は60件以上あり、出力を単純合計すると70万kWを超え、もしすべて稼働すれば現在の素材生産量に匹敵する木材需要が生まれる”、 ”今の未利用材バイオマス発電狂騒曲では、ずさんな事業構想、楽観的過ぎる燃料調達、現

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