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Technical Paper

Proactive Demand Management for Electric-powered Transport Refrigeration Units

2011-09-13
2011-01-2300
As commercial fleets adopt more electrically-powered hardware, including vehicles and transportation equipment, new demands are being placed on the existing electrical infrastructure. Demand management is critical as facilities reach their electrical capacity through growing electric energy demands or come under electricity use restrictions through banding and time-of-day use agreements (which incentivize reduced demand on electrical resources). Most current demand management systems focus on reactive actions such as denying availability (e.g. rolling brown out) during peaking events. In many situations, this denial of service may be highly undesirable, as is the case with electric-powered transport refrigeration units (eTRUs), which must maintain a narrow temperature band to protect perishable products.
Technical Paper

Acoustic Enhancement Using Chemistry to Formulate A Spray-On Constrained Layer Vibration Damper

2005-05-16
2005-01-2278
Maintaining or improving acoustic and vibration quality of vehicles, the automotive industry continually faces design goals to reduce weight and manufacturing cost. In light of these objectives, advanced material design techniques facilitate the development of a high performance bulk applied constrained layer vibration damper aimed at improved automotive acoustics. The overall vehicle acoustic and vibration quality relies heavily on floor pan vibration dampers. A review of current industry damping technologies is addressed. Industry migration to bulk applied extensional dampers from the once ubiquitous asphalt sheet damper is discussed. Furthermore, this paper addresses the development of a new bulk applied constrained layer damper technology that delivers superior acoustical performance. The paper presents the chemistry formulation, the prediction of analytical results, and experimental validation.
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