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Hybrid Locomotive Waste Heat Recovery System (L-WHRS) Safety and Field Demonstration

Document Series
Technical Reports
Federal Railroad Administration
Report Number
Subject Rolling Stock
locomotive, waste heat recovery, efficiency, fuel consumption reduction, emissions reductions, augmented powergeneration, decarbonization, Energy Storage System, ESS, Locomotive-Waste Heat Recovery Systems, L-WHRS, heating, ventilation, air condition

ThermaDynamics Rail LLC (TDR) developed the Locomotive-Waste Heat Recovery Systems (L-WHRS) formed by high-pressure heat exchangers coupled to a closed-loop Organic Rankine Cycle (ORC). The L-WHRS can be configured to be non-invasively retrofitted onto different types of locomotive engines to recover and convert locomotive waste thermal energy into conditioned, pollutant-free, electrical power. Under the sponsorship of the Federal Railroad Administration (FRA), TDR successfully completed a series of demonstration phases that increased the technology readiness level to a full-scale operational system. Full-scale L-WHRS testing involved static tests using simulator and dynamic over-the-road locomotive tests under various operational conditions. This report describes the design and testing of the L-WHRS electrical system configured to supply electric power to selected locomotive electrical loads and to an advanced Energy Storage System (ESS). These tests demonstrated feasibility to utilize the L-WHRS as an electric generator that can simultaneously supply power to the ESS and locomotive electrical loads.

Last updated: Monday, November 7, 2022