Waste Heat Recovery
AI Overview
The Navy seeks an innovative waste heat recovery system to capture thermal energy from LM 2500 engine exhaust and convert it to electrical power, reducing fuel consumption and emissions while operating within strict DDG 51 Class constraints on space, weight, and radar signature.
This summary is AI-generated from the official solicitation.
Key Details
Official Description
LM 2500 gas turbine engines’ maximum thermal efficiency is approximately 38%. This means at least 62% of the energy in every drop of fuel consumed by the process of propelling a DDG 51 Class ship is unused and available for harvesting as it is being expelled in the form of heat via engine exhaust. Significant energy that is currently “wasted” could be recovered from exhaust to save on fuel costs and increase the range of surface combatants. To effectively utilize all resources, the Navy seeks to...
Change History
Waste Heat Recovery
Q1 received a new answer clarifying heat rejection options: proposers can use existing seawater systems (28°F–95°F, 35 PSI nominal) or alternatives. The answer emphasizes Phase I focus is on demonstrating technology effectiveness and ROI, not integration into existing systems. Proposers must define their cooling requirements and operational assumptions.
Waste Heat Recovery
**Q&A Changes Summary:** Added 1 new question (Q1) regarding seawater cooling infrastructure availability, temperatures, and flow rates for heat rejection systems. Previous Q&As renumbered accordingly (Q1→Q2, Q2→Q3, Q3→Q4). No answer content was modified.
Waste Heat Recovery
Status changed from Pre-Release to Open
Waste Heat Recovery
**Q2 now has an answer** clarifying that sCO₂ power cycles are technology-agnostic and responsive, but proposals must address high-pressure integration challenges and SWaP-C constraints within the DDG-51's operational profile.
Waste Heat Recovery
Added new Q1 asking if Navy would accept all-electric, solid-state, low-maintenance technology with lower peak efficiency but net energy gain across all engine speeds. Original Q1 about sCO₂ cycles moved to Q2. Q3 (waste heat temperature data) renumbered with no content changes.
Waste Heat Recovery
Added Q1 asking whether supercritical CO₂ (sCO₂) power cycles are responsive given space/weight/integration constraints on naval vessels. The answer to this question is not provided in the updated Q&A section.
Waste Heat Recovery
No changes detected. The Q&A content is identical between the previous and updated versions.
Waste Heat Recovery
Q1 received a detailed answer clarifying waste heat temperature ranges for DDG-51 Gas Turbine Module operations, specifying that exhaust temperatures are ≤1000°F over 75% of underway time, with percentage breakdowns by temperature band (800-1000°F: ~55%, 1000-1200°F: ~15%, 1200-1400°F: ~8%, >1400°F: ~1%), and directing offerors to optimize solutions for lower-temperature conditions.
Waste Heat Recovery
Q&A section updated
Waste Heat Recovery
Close Date changed from 2026-04-22 to 2026-06-03
Waste Heat Recovery
Open Date changed from 2026-03-25 to 2026-05-06
Waste Heat Recovery
Status changed from Removed to Pre-Release
Waste Heat Recovery
Opportunity DON26TZ01-NV006 no longer available
Waste Heat Recovery
New opportunity: Waste Heat Recovery
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