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Show The heat rejection system consists of a radiator, pump, valves and interconnecting piping. Hot water (approximately 200°F) exits the pump in a 1" pipe at 30 psig and 32 GPM. The water flows outside the building to a radiator. This radiator is rated to reject 750,000 BTU/hr at a flow of 30 GPM, dropping water temperature from 200°F to 149°F in ambient air conditions of 90°F. Heat rejection is measured directly by using inlet and outlet thermocouples and a turbine type water flowmeter, coupled to a datalogger. On-line stack gas analysis equipment is used to monitor O2, NO, NO , CO, C02, S02 and unburned hydrocarbons. An apparatus for determining particulate matter utilizes a ceramic thimble and holder with a line connecting the thimble holder to a vacuum pump in line with a wet test meter. Operations Procedure A water/ethylene glycol bath was used to preheat both the No. 6 oil and PETCOM for combustion. The fuel was preheated to a temperature of approximately 170°F, and placed in the feed funnel of the Moyno pump. A furnace warm-up procedure was utilized to prepare the unit for PETCOM. A 90-minute burning period with the base No. 6 fuel brought the refractory and heat rejection systems up to a temperature of equilization prior to the introduction of the PETCOM to be tested. A separate Moyno was used to feed the No. 6 oil to the preheating system. After the furnace reached equilibrium, the PETCOM fuel was fed to the burner system by slowly changing from No. 6 to PETCOM by adjusting the pumping rates of the two feed systems. An overall heat balance is made on 100% base fuel oil to obtain a baseline for comparison of heating efficiencies when burning PETCOM fuels. 4. TEST RESULTS Ultrafine coke particles in PETCOM promote high combustion efficiency and prolong storage stability. However, the ultrafine grind also 19-12 |