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an analysis report for the oil sample detailing the levels of wear metals and oil oxidation. A clean oil sample was analyzed before the experiment to provide baseline values for accurate comparison. Much of the facility described in the previous sections is manually controlled and this section will describe the procedures used to start and operate the system as well as the actual test procedures. Before startup, a series of system checks were performed to ensure readiness for operation. First, all fluid levels were checked, including engine oil, HTF, EG, and diesel fuel. The quantity of engine oil and HTF added was recorded to monitor usage. After fluid levels were verified, the HTF pump was started using the VFD and set to a frequency that resulted in a flow rate of at least 3.8 L min-1. The oil pump was then started via the VFD and set to provide between 310.3 and 344.7 kPa of pressure. Before cranking the engine, the key was turned to the ON position and the glow plug switch was energized for approximately 15 seconds to warm the pre-chambers. The engine was then cranked until engine firing was confirmed. The engine was allowed to idle until the oil temperature was above 40 ̊C, after which the engine speed was increased in steps to the desired value (2800-3400 rpm). Once the oil temperature was above 50 ̊C, a load was applied via the dynamometer in 2 N-m increments up to the target torque allowing time between each step for the engine oil temperature to stabilize. The test engine was operated over a wide range of loads as well as coolant temperatures. The procedure for reaching a set point is as follows. First, the engine speed was adjusted to the rough target using the cable operated speed control on the high-pressure fuel pump. Following speed adjustment, engine load was set using tumblers on the front face of the dyno controller. Engine speed was then readjusted after the target load was reached to achieve the target engine speed within ±10 rpm. Initially, the secondary cooling system pump remained off to allow the HTF temperature to increase more rapidly. Once the HTF temperature approached 75% of the target 53PDF Image | WASTE HEAT RECOVERY FROM A HIGH TEMPERATURE DIESEL ENGINE
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