Characterisation of a Thermal Energy Storage System
Автор:Ashmore Mawire Год: 2013 Издание:LAP Lambert Academic Publishing Страниц: 256 ISBN: 9783659364105 An oil/pebble–bed thermal energy storage (TES) system to enhance the performance of a solar cooker is characterized by simulation and experiment. Mathematical models to describe the thermal parameters of the solar cooking and TES system are developed using energy balance equations. The models are validated with experimental data and reasonable agreement between experiment and model is achieved. Two charging methods of the TES system are proposed and implemented using a Simulink block model in the Matlab environment.The constant flow rate (CFC) method charges the storage at a constant flow rate while the constant temperature charging (CTC) method maintains the outlet charging temperature at a constant value by making the flow rate variable. Simulation results indicate a greater degree of thermal stratification, a greater energy stored and a greater exergy stored when using constant temperature charging.The performance of three solid material (fused silica glass, alumina,...
