| Summary: | Stratified Thermal Energy Storage (TES) tank has been used widely related to cogeneration plant by utilizing waste heat energy from gas turbine. The TES tank is useful for energy shifting, by charging the TES tank al off peak demand and discharging it during on-peak demand This research is aimed to develop a new simulation model enable for prediction of charging TES tank. The model is developed based on a mathematical formulation for representing distribution temperature in the TES tank. Validation of the model was carried out using experiment data of charging TES tank. The research uses 3 steps namely development of simulation model, data processing and validation of the model. Results yielded that simulation model has been developed based on temperature distribution analysis using Sigmoid Dose Response (SDR) equation. Further, SDR function can be explored for mathematical formulations of the important parameters of the TES tank. The parameters are limit points and thermocline thickness, full and empty capacity based on two criteria, transition temperature, cumulative cooling capacity as well as half-cycle of Figure of Merit. Development of simulation model is then carried out for prediction of performance during charging of the TES tank. Validation of the model simulation was conducted using experimental data of TES tank. Validation results showed that the simulation model was accepted to enable determination of charging the TES tank performance parameters. The new simulation model of the TES tank is useful to be implemented for operation evaluation and design of stratified thermal energy storage tank. The model simulation can be enhanced to increase efficiency of the WS tank incorporated to cogeneration plant.
Keywords: simulation model, stratified thermal energy storage tank, temperature distribution, Sigmoid Dose Response
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