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WASTE HEAT RECOVERY FROM A HIGH TEMPERATURE DIESEL ENGINE

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WASTE HEAT RECOVERY FROM A HIGH TEMPERATURE DIESEL ENGINE ( waste-heat-recovery-from-high-temperature-diesel-engine )

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Figure 1-1. Figure 1-2. Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 3-1. Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 3-7. Figure 3-8. Figure 3-9. Figure 3-10. Figure 3-11. Figure 3-12. Figure 3-13. LIST OF FIGURES Energy balance for a typical diesel engine at high load [1-5].................................. 1 Rankine cycle waste heat recovery system components and T-S diagram [13]. ..... 3 Combined evaporator and catalyst design (left) and resulting efficiency (right) [32]. ................................................................................................................................... 9 WHR system diagram showing the typical configuration and components [15].... 12 Configuration of WHR systems for EGR only and EGR and exhaust combined [34]. ......................................................................................................................... 16 Diagram of cylinder head modified specifically for WHR with the goal of increasing working fluid temperatures [32]. Modifications include special cooling passages around exhaust valves to recover waste heat at high temperatures (~190°C).................................................................................................................. 26 Redesigned coolant passages used to recover heat from the top of the cylinders at 190°C [32]. .............................................................................................................. 27 Custom copper cylinder head gasket....................................................................... 34 Engine block with stainless steel combustion chamber O-ring seals installed. ...... 35 Piston ring in cylinder bore with arrowing pointing to ring gap. ............................ 36 Front (left) and rear (right) crankshaft seals that were replaced with high temperature Viton alternative.................................................................................. 38 Heat shield for high pressure fuel pump. ................................................................ 39 Engine timing gears with arrows showing crankshaft gear, idler gear, and oil pump gear. ......................................................................................................................... 40 Removing oil pump drive shaft and pinion (left). Bolt used to plug oil pump shaft bore (right)............................................................................................................... 40 Completed test facility including dynamometer controller in the bottom of the image. ...................................................................................................................... 42 Diagram of test facility showing cooling and oil systems and all instrumentation. 43 Internal gear pump used to pressurize cooling system............................................ 45 Brazed flat plate heat exchanger used to reject heat from primary coolant to secondary coolant. ................................................................................................... 46 Adapter used to connect to custom cooling system installed in original water pump location. ................................................................................................................... 47 Locations of thermocouples used to monitor air temperature. ................................ 49 x

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