U.S. Army Communications-Electronics Command Acquisition Center -- Washington Operations Office, 2461 Eisenhower Ave., Alexandria, VA 22331-0700

A -- NOISE SUPPRESSION SYSTEM FOR A MILITARY DIESEL FUEL BURNING GENERATOR DUE 071499 POC C.R. Krishna (516) 344-4025 WEB: http://www.cecomacw.army.mil, http://www.cecomacw.army.mil. E-MAIL: (516) 344-4025, Krishna@bnl.gov. Noise Suppression Systems for Military (5 -- 60 kW) Diesel Fuel Burning Generator Sets Noise Suppression systems for military generator sets for the 21st Century Battlefield. Request for Information (RFI), the US Army Communication and Electronics Command, R&D Center, Command and Control Directorate, Army Power Division, Power Generation Branch, Advanced Technology Power Source team is soliciting information from manufacturers who have the technology for reducing (suppressing) noise from engine-generator sets that start and operate on diesel or JP8. The engines shall be state of the art diesel fuel burning engines that are currently available and/or will be commercially available in the next two to three years. The generator sets are expected to be packaged in the usual way in a 'rectangular' box that is rugged for field operation. This will be the basis for the development of a new family of generator sets in the 5 to 60 kW ranges for application to the 21st Century Battlefield. The key requirement for noise emission from these generator sets is for a level of 65 dBA across the audible spectrum at 7 meters from the box. Both passive and active control technologies are being considered to meet this requirement. The suppression technology will have to be applied to the intake and exhaust system of the engine with minimum impact on performance and to the noise emitted from the box. The design, materials used and the construction shall be such as to minimize additional weight and be able to withstand ambient temperatures between -50o F to + 140oF at any possible humidity. As the generator sets will be deployed in the field, the design and construction shall also be easily transportable, permit quick setup and be sufficiently rugged. The design shall also be such as to minimize maintenance and possess mean time between overhaul at least equal to that of the engine-generator system. The performance specifications for the engine-generator system are not yet finalized, except for the power range, which is5 to 60 kilowatts. Therefore, what is requested at this stage are: 1. a broad statement of capabilities, 2. a description of present technologies and of potential new or improved active and/or passive technologies that could become commercial within the next three years, 3. some indications of performance, such as weight increase per dBA reduction, impact on the performance of the engine/generator, maintenance and replacement characteristics where relevant, description of suppressant materials and an indication of the range of costs per dBA reduction of the different suppression techniques, and 4. sample cost data of existing, currently implemented active and/or passive noise systems. The above information is to be sent to the following within 30 days of this announcement: Any product information obtained as a result of this RFI could be used to help assist in the acquisition process. The government does not plan to award any contracts or otherwise pay for any information received from this RFI. It is highly desirable that the government receives unlimited rights to this information. However, if any proprietary material is stated please indicate this and clearly separate material from the rest of document. C.R.Krishna Brookhaven National Laboratory Building 526, Upton, NY 11973-5000 Krishna@bnl.gov Phone: 516-344-4025 The information will be supplanted by discussions and reviews. Subsequently, the CECOM RDE Center will initiate a process for the procurement of these systems. Posted 06/11/99 (W-SN342086). (0162)

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