Idle Reduction Technology Demonstration Plan

Proc, K.; Nitschke, B.; Wagner, F A; Anderson, M.; Slezak, Lee

doi:10.2172/15003727

Cited by 2 publications

(3 citation statements)

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“…Payback periods of approx. 1 year have been determined when used as an anti-idling technology for trucks which is below an acceptable limit of two years for truck fleets [19]. Compared to a conventional generator the VSCF system reaches a higher net present value at periods of less than one year.…”

Section: Resultsmentioning

confidence: 99%

Potential of Reduced Fuel Consumption of Diesel-Electric APUs at Variable Speed in Mobile Applications

Dengler

Geimer

Zahoransky³

2011

SAE Technical Paper Series

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Auxiliary power units (APUs) are used in mobile applications to provide electrical power until approx. 10 kW. It is state of the art that these generators are driven by a diesel engine at constant speed and are selected according to the expected maximal power needed. These systems have a low efficiency and consequently a high fuel consumption particularly when driven at small loads. The system can yield a higher efficiency for partial load conditions by reducing the rotary speed of the driving diesel engine. The optimum in rotary speed of the diesel engine for different loads is preprogrammed (engine mapping) in the diesel control unit. A frequency converter allows a constant frequency of the electricity output at variable speed of the generator. These higher costs for frequency converter and diesel controller demand especially for mobile applications a proof of efficiency, i.e. a proof of economics, which is shown in this paper. A diesel electric drive train has been mounted on the test rig consisting of a diesel engine, a permanent magnet synchronous generator, a frequency converter and an electric load. The components were analysed individually in a first step to determine the efficiency characteristics. With the individual efficiencies of the components, the total efficiency of the drive train can be calculated in respect to rotary speed and torque. Relevant load profiles where chosen which represent typical duty cycles in stationary and mobile applications. The consumption of the variable speed generator was tested and the control parameters for the diesel engine were optimized using a simulation model. The final control parameters were implemented into the diesel controller at the test rig. The recorded experimental results were compared to the simulation results. The test results proved the precise prediction of fuel consumption by the simulation model. Tests and simulations resulted in a reduction of fuel consumption of about 30% for all of the relevant load profiles compared to the state of the art power units operating at constant speed of revolution. Further fuel saving potential was achieved with a start/stop-function which stops the diesel engine after a determined time period when no power is needed in order to avoid idle operation periods. An economic analysis concludes this study. It was proved that the higher investment costs will be amortized within approx. one year.

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Section: Resultsmentioning

confidence: 99%

Potential of Reduced Fuel Consumption of Diesel-Electric APUs at Variable Speed in Mobile Applications

Dengler

Geimer

Zahoransky³

2011

SAE Technical Paper Series

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“…The U.S. Department of Energy's (DOE) Advanced Vehicle Testing Activity (AVTA) initiated a study of diesel truck engine idle reduction technologies in 2002 [3]. This study consisted of several projects that evaluated existing on-board idle reduction technologies, including diesel-fired and electric heaters, electric air conditioning systems, and an auxiliary cab cooler using phase change material.…”

Section: Introductionmentioning

confidence: 99%

“…To the address the identified cost issue, DOE solicited proposals for cost-shared projects to integrate an onboard idle reduction technology at a truck original equipment manufacturer (OEM) [3]. International Truck and Engine Corp. was awarded a contract, and the design and factory installation work is currently underway.…”

Section: Introductionmentioning

confidence: 99%

Thermal Load Reduction of Truck Tractor Sleeper Cabins

Proc¹,

Chaney²,

Sailor³

2008

SAE Int. J. Commer. Veh.

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Several configurations of truck tractor sleeper cabs were tested and modeled to investigate the potential to reduce heating and cooling loads. Two trucks were tested outdoors and a third was used as a control. Data from the testing were used to validate a computational fluid dynamics (CFD) model and this model was used to predict reductions in cooling loads during daytime rest periods. The test configurations included the application of standard-equipped sleeper privacy curtain and window shades, an optional insulated or arctic sleeper curtain, and insulated window coverings. The standard curtain reduced sleeper area heating load by 21% in one test truck, while the arctic curtain decreased it by 26%. Insulated window coverings reduced the heating load by 16% in the other test truck and lowered daytime solar temperature gain by 8˚C. The lowered temperature resulted in a predicted 34% reduction in cooling load from the model. Modeling also predicted doubling cab insulation could reduce cooling load by 35% and up to 54% with the sleeper curtain closed. Infrared images of the truck cabs identified other potential areas to reduce heat loss that included areas around window and door seals, at body and structural seams, and areas where insulation may be lacking around air circulation ducts.

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Idle Reduction Technology Demonstration Plan

Cited by 2 publications

References 0 publications

Potential of Reduced Fuel Consumption of Diesel-Electric APUs at Variable Speed in Mobile Applications

Potential of Reduced Fuel Consumption of Diesel-Electric APUs at Variable Speed in Mobile Applications

Thermal Load Reduction of Truck Tractor Sleeper Cabins

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