Status Report on Diesel Organic Rankine Compound Engine for Long-Haul Trucks

摘要

A Class 8 truck has been equipped with a completely integrated compound engine, consisting of a diesel engine coupled to a Rankine engine, which operates on the exhaust heat from the diesel engine. The prototype compound engine is built around a standard Mack Truck diesel engine, and the waste heat recovery system is a Thermo Electron organic Rankine bottoming cycle system incorporating a turbine expander, delivering power to the diesel engine drive train. The addition of an organic Rankine bottoming cycle to a long-haul diesel truck can improve the fuel economy by 15% over a typical duty cycle. Installation of this type of compound engine in all of the 490,000 Class 7 and 8 heavy-duty trucks projected to be engaged in long-distance hauling this year (1980) would save 1.43 billion gallons of diesel fuel annually, or an average fuel savings of 3000 gallons per truck. Work performed from October 1979 to April 1980 and the program developments and testing results achieved to date are summarized. A fuel economy evaluation of the prototype truck during over-the-road operation is presented with other performance results acquired during dynamometer testing of the vehicle. Energy policy and economic issues relevant to this program are discussed in the Appendix. (ERA citation 05:033820)