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Pawito M Sontowiro
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Mechanical Engineering

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ANGKA KONVEKSI TERMAL ALIRAN FLUIDISI PADA TABUNG HORISONTAL DAN ANGKA REYNOLDS RENDAH Pawito M Sontowiro
Mesin Vol. 13 No. 1 (1998)
Publisher : Mesin

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Abstract

A fluidized bed is a bed comprises a mixture of solid particles suspension in stream of gas. The heat transfer phenomenon between the surface of immersed body to/from fluidized bed is very complicated mechanism. Aside from the governing variables on conventional convective heal transfer, the rate of heat transfer coefficient in fluidized bed, is also influenced by physical and geometrical properties of solid particle. One of the variables which governs the value of thermal convective heat transfer coefiicient is voidage. The influence of voidage on thermal convective heat transfer coefficient at low Reynolds number will be reported on this paper.
ANALISIS SIKLUS KOMBINASI GAS DAN UAP Pawito M Sontowiro
Mesin Vol. 13 No. 3 (1998)
Publisher : Mesin

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Abstract

In general, the gas exits from gas turbine still has a high temperature. To recover its energy, a Rankine cycle is installed to receive thermal input energy from the gas. For each value of pressure ratio of the Brayton cycle, the optimum total efficiency is largely controlled by the pressure and temperature of steam entering turbine and the steam"”air mass flow rate ratio of the system. With the environment, the fluid entering temperature to the turbines, the minimum fluids temperatures difference in heat exchangers, and the quality of steam at the exit of steam turbine as constraints, optimum total efficiency of the system is investigated on this report.
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