Guernsey's Energy Alternatives Study for U.S. Army Space & Missile Defense Command

The U.S. Army was tasked with aligning the operations on Kwajalein Atoll with the Army Climate Strategy, aiming to achieve 100% carbon pollution-free electricity by 2030. The Atoll's remote location presented unique logistical and environmental challenges.

Guernsey conducted a comprehensive study exploring viable energy alternatives to help the Kwajalein Atoll Garrison meet its ambitious climate goals. The study identified three potential technologies:

1. Solar Photovoltaic with Battery Energy Storage System: This option involved installing a 61.5-MW floating solar array in the lagoon due to limited land availability. Battery storage would provide limited backup power.
2. Hydrogen Fuel Cells with On-Site Hydrogen Production: These cells utilize photovoltaics to produce hydrogen, which could be stored and used to generate electricity, ensuring a resilient power supply.
3. Ocean Thermal Energy Conversion (OTEC): This technology leverages the natural temperature gradient between surface seawater and deeper cold waters to generate power. It also includes a desalination component to produce fresh water.

Guernsey's approach included detailed modeling of each alternative against the current diesel-powered system. The analysis considered various scenarios over a year to predict operational performance and accurately identify the most efficient solutions. The study also included a lifecycle cost analysis to compare the initial and ongoing costs of each technology.

The study concluded that Ocean Thermal Energy Conversion (OTEC) was the best alternative for the main island due to its economic and operational feasibility. Guernsey projected the OTEC system would save nearly $463 million over 25 years compared to continuing diesel use. We recommended photovoltaic systems with battery storage for outer islands.

The team created a strategic plan for the phased implementation of the recommended solutions. The plan required securing permissions from the Republic of the Marshall Islands to use marine spaces and involved managing the project in detail to meet timelines and budgets.

This project supports the U.S. Army's goals under the Army Climate Strategy and enhances Kwajalein Atoll's energy resilience. It reduces reliance on diesel, lowers operational costs, and significantly decreases carbon emissions, contributing to a sustainable and secure energy future for the installation.

Guernsey's meticulous study and strategic energy planning exemplify their capability to handle complex, high-stakes projects for governmental clients, providing sustainable, cost-effective solutions tailored to the unique challenges of remote military installations.