This novel study assesses techno-economics of replacing diesel with liquefied natural gas (LNG) in remote Nunavut communities. The methodology uses an economic model to calculate delivered costs of LNG for a supply chain comprising terminal costs, shipping costs, and annual onsite storage cost. CO₂ reduction potential and upfront costs to implement LNG or renewable electricity projects are estimated for five remote Nunavut sites. The impact of replacing diesel with LNG on electricity price is examined, as well as socioeconomic and environmental benefits.

The study finds the most cost-effective LNG supply option utilizes arctic sealift/LNG resupply vessels that bunker LNG to ISO containers for on-site storage. With leveraging of 75% of CAPEX, a delivered cost of $0.94/DLE LNG is attained, 13% lower than the price of fuel oil in the two cases studied. The impact of fuel switching to LNG on the incremental cost of electricity generation is negligible. Also, fixed cost of avoided CO₂ emissions to replace 100% of diesel with LNG falls within the same range as costs to install wind–diesel electricity generation systems at 25% renewable penetration, i.e., between $336–788/tonne CO₂ avoided. Further reductions are possible by opting for higher renewable gas content in LNG.

这项新颖的研究评估了偏远的努纳武特地区以液化天然气（LNG）替代柴油的技术经济性。该方法使用经济模型来计算供应链的液化天然气交付成本，包括终端成本，运输成本和年度现场存储成本。CO ₂减排潜力和前期成本来实现LNG或可再生能源发电项目预计于五个远程站点努纳武特地区。研究了用液化天然气代替柴油对电价的影响以及社会经济和环境效益。

研究发现，最具成本效益的液化天然气供应选择是利用北极海运/液化天然气补给船，将液化天然气加到ISO集装箱中进行现场存储。利用75％的CAPEX，交付的成本为0.94美元/ DLE LNG，在这两个案例中，比燃油价格低13％。燃料转换为液化天然气对发电增量成本的影响可以忽略不计。同样，用LNG代替100％柴油可避免的CO ₂排放的固定成本，与安装可再生能源渗透率为25％的风能柴油发电系统的成本处于同一范围内，即，避免的CO ₂为$ 336-788 / t 。通过选择液化天然气中更高的可再生气体含量，可以进一步减少排放量。