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Dr. Ahmad Sakhrieh
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Engine Simulation
diesel engine simulation taking into consideration heat transfer and variable specific heats.
Oil shale direct burning
As part of my research a circulating fluidized bed combustor that simulates the behavior of full scale municipal oil shale combustors was designed and manufactured. The inside diameter of the combustor is 500 mm, the height is 3000 mm. The fluidized bed reactor is expected to produce 3 kW, which corresponds to a fuel-feeding rate of approximately 1.5 kg/h.
Solar Ponds
An insulated solar pond with a surface area of 3.5 m2 and a depth of 1.0 m was built at the University of Jordan to conduct performance experiments. The three salty water zones (upper convective, non-convective and heat storage) were formed by filling the pond with salty water of various densities. 16 thermocouples (type T) were used to measure the temperature profile within the pond. In the theoretical part, a MATlab code was developed to predict the temperature distribution along the solar pond.
Solar cooling
The solar cooling analysis is performed for a 41 m2 with a 3.65 m height laboratory located at Mango Centre for Scientific Research- University of Jordan in Amman. The results show that solar collectors of 196 m2 can provide solar heat for an 8 kW solar air-conditioning system. Moreover, domestic hot water (solar fraction up to 100%) and solar heating (approx. 15-25% solar fraction) could be also provided, with the solar air-conditioning system, for the Center. An economic study was also conceded.
Phase change material
the effect of using a phase change material on the storage capacity of a conventional solar storage system was carried out. This was obtained by using encapsulated spheres that contained the paraffin wax as a phase change material; this enables the control the phase change material used quantity.
Exhaust gas after treatment
A simple low-cost exhaust gas after-treatment filter using limestone was developed. The limestone filter was investigated on a four cylinder DI diesel engine coupled with dynamometer to reduce exhaust gas emissions under variable engine running conditions. Limestone was placed in cast iron housing through which exhaust gases passed. Emissions like carbon dioxide (CO2) and oxides of nitrogen (NOX) were significantly reduced. There was no fuel penalty by using the limestone filter.
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