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Development and experimental validation of simplified numerical models for stratified thermal energy storage tanks including standby storage mode and adverse feed temperatures.

Number: 2277

Author(s) : MOGHIMI P., ALGHAMDI K. I., BACH C. K., SPITLER J. D.

Summary

Thermal Energy Storage (TES) offers a promising solution for facilitating increased use of renewables while ensuring electrical grid stability. Integrating TES in a residential building can also help addressing supply-demand mismatches by shifting the building’s thermal loads to off-peak hours of the grid. The feasibility of TES’s integration should be studied on a system level in building by year-round simulations and this is not achievable without simplified, efficient and yet accurate numerical models for stratified TES tanks. In this study, we compare three developed 1-D numerical models: Second Order Upwind (2OU), Crank-Nicolson (CN) and Hybrid. We evaluate each model under various operational scenarios representing realistic conditions in a water-based system. These scenarios include charging, discharging, standby storage mode, and exposure to adverse feed temperatures. Additionally, we examine models’ accuracy compared to experiments and investigate the validity of 1-D assumption. Results indicate that the developed CN and Hybrid models are reliable options for system level modeling; the CN provides slightly higher prediction accuracy while the Hybrid model performed better in energy conservation.

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  • Original title: Development and experimental validation of simplified numerical models for stratified thermal energy storage tanks including standby storage mode and adverse feed temperatures.
  • Record ID : 30033195
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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