Lawrence Berkeley National Laboratory,
Keywords: energy measures, evaluation, measurement and verification, M&V
Summary:The U.S. Navy’s Military Sealift Command (MSC) has initiated a variety of energy- and fuel-saving measures on MSC vessels, in compliance with the Secretary of the Navy’s challenge to Navy activities, both land-based and operational, to improve energy efficiency. For these MSC initiatives to be sustainable and replicable, the results must be demonstrated. There must be practicable and reliable methods for measuring and verifying savings achieved, particularly in those instances where the cash value of energy savings are used not only to justify but also to finance the energy conservation measures (ECMs). There is rich precedent in measurement and verification (M&V) in stationary commercial buildings and industrial facilities, codified in the International Performance Measurement and Verification Protocol (IPMVP). IPMVP offers an overall framework of definitions and broad approaches for verifying the savings in commercial and industrial energy efficiency projects. It also presents procedures to design an M&V program with varying levels of accuracy in order to manage the associated M&V costs. IPMVP M&V guidelines are very generic and intended to be applied to evaluate the performance of energy projects for a wide range of applications and hence lack the specificity that might be needed to apply it to individual applications like energy conservation projects on ships. A significant challenge is to adapt IPMVP principles to the environment of a sea-going vessel, where the bulk of energy use is devoted to highly variable propulsion end-use, and to do so with methods that are neither inordinately complex nor expensive to apply. This work highlights recent work related to M&V guidelines for shipboard applications based on existing IPMVP’s Concepts and Options for Determining Energy and Water Savings. This work highlights some of the key facets of these guidelines including the M&V process that aligns with MSC’s existing energy management processes; a process to aid in selecting an M&V option given an energy project or a measure; along with defining document requirements that include standardized M&V plan and reports. Finally, these guidelines will be applied to evaluate the performance for some of the current shipboard ECMs.