温室トマト苗生産におけるエネルギー転換のライフサイクル評価：化石燃料から太陽光発電へ
Life Cycle Assessment of Energy Transition in Greenhouse Tomato Seedling Production: From Fossil Fuels to Photovoltaics (原題)
Maria Ravani, Georgios K. Ntinas
🤖 gxceed AI 要約
日本語
商業苗圃でのディーゼル暖房から太陽光発電支援型電気暖房への転換をLCAで評価した研究。ベースラインでは暖房が炭素フットプリントの52.3%を占め最大ホットスポットだった。同一期間比較でPV電化により炭素フットプリントが44.8%削減され、苗あたり2.47×10⁻²から1.36×10⁻² kg CO2eqへ低下。一方でPV電力は鉱物・金属資源使用を増加させるトレードオフも示した。
English
This study applies LCA to a commercial nursery replacing diesel heating with PV-supported electric heating for greenhouse tomato seedlings. Diesel was the dominant hotspot at 52.3% of the carbon footprint; a same-period counterfactual cut emissions by 44.8% (2.47×10⁻² to 1.36×10⁻² kg CO2eq per seedling). PV electricity raised mineral and metal resource use, revealing trade-offs. Operational second-period results (~49% lower) are reported as complementary, not isolated, evidence.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の農業分野でも施設園芸の重油依存は課題で、脱炭素化とエネルギーコスト削減の両立が政策課題。SSBJやScope 3開示の観点でも、一次産業サプライチェーンの排出削減事例として参考になる。
In the global GX context
Adds facility-level empirical evidence to the global transition-finance and Scope 3 discussion, showing how on-site PV electrification can decarbonize agricultural supply chains while exposing resource-use trade-offs relevant to CSRD/ISSB value-chain reporting.
👥 読者別の含意
🔬研究者:農業・施設園芸のLCAにおける電化シナリオとトレードオフ評価の実証例として参照できる。
🏢実務担当者:自社サプライチェーン上流の農業生産者に対するPV電化支援の投資判断材料になる。
🏛政策担当者:施設園芸の脱炭素化支援策や農業向け再エネ導入インセンティブ設計の根拠として活用できる。
📄 Abstract（原文）
Greenhouse production can require substantial heating energy, causing significant environmental impacts when fossil fuels are used. This study combined Life Cycle Assessment (LCA), engineering sizing, and post-implementation assessment to investigate the replacement of diesel-based heating with photovoltaic-supported electric heating in a commercial nursery. A baseline LCA using data from the first cultivation period identified diesel heating as the main hotspot, accounting for 52.3% of the carbon footprint. A same-period counterfactual scenario maintained all non-heating inventory flows unchanged, while replacing the useful heating service from 3500 L of diesel with 22,409 kWh of electricity modelled using a PV-electricity dataset. The carbon footprint decreased from 2.47 × 10−2 to 1.36 × 10−2 kg CO2 eq per seedling. Fossil-related impacts also decreased, although photovoltaic electricity increased mineral and metal resource use and selected upstream impacts. The engineering assessment estimated 26.4 kW heating capacity and 7918 kWh seasonal electricity consumption. In practice, a 10 kW electric fan heater was installed and consumed 4141 kWh during the second cultivation period. Under the same-period controlled comparison, replacement of diesel heating with PV-supported electric heating reduced the carbon footprint by 44.8%. The operational LCA of the second cultivation period yielded 1.25 × 10−2 kg CO2 eq per seedling, approximately 49% lower than the first-period value. Because production output and other inventory inputs also differed between periods, this interannual change is reported as a complementary operational observation rather than as the isolated effect of the heating-system transition. The study provides case-specific evidence on the environmental benefits, trade-offs, and operational implications of replacing diesel-based heating with PV-supported electric heating in a commercial greenhouse nursery.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su182010315first seen 2026-10-31 04:47:45 · last seen 2026-11-06 04:35:39
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