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| dc.description.abstract | A stratified thermal energy storage tank is often used on a cogeneration power plant to store
thermal energy which is produced by exhausted gas energy utilizations from gas turbines. This
tank is used as a thermal loads controller on that cogeneration power plant operation by
charging the energy when the loads become minimum, and discharging when it is maximum. In
this research, a new model is proposed by developing a mechanistic model which is determined
from a non-linier regression function using analyzing of temperature distributions to determine
the characteristic parameters of stratified PET tank. The temperature distribution data are
reached from experiments ofvariable of flowrates.Applying a mechanistic model, the
characteristic formulation of the tank is developed.Experiment results show that the
temperature distribution of water in the stratified thermal energy storage tank can be
represented by Four Parameter Sigmoid (FPS) equation. This equation generally connects the
distribution temperature with four others parameters i.e. mean temperatures of cold water,
mean temperatures of hot water, a centre point and also slope gradients of thermo-cline(S).
Using the FPS equation, the temperature distribution parameters of the thermal energy storage
tank are mathematically differentiated. Those parameters include a limit point, thermocline
thicknesses, cumulative storage energy (Qcum), and characteristics of Half Figure of Merit
(FoM1/2). The results show that values of S are influenced by the flowrates while the thermocline
thickness, the cumulative energy storage (Qcum) and the ratio of Half Figure of Merit (FOM1/2)
are influenced by the value of S. | en_US |
