scholarly journals Comparison of Model Predictions and Performance Test Data for a Prototype Thermal Energy Storage Module

2019 ◽  
Author(s):  
Dre Helmns ◽  
Van P. Carey ◽  
Navin Kumar ◽  
Debjyoti Banerjee ◽  
Arun Muley ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Plant ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
High Performance ◽  
Performance Test ◽  
Experimental Program ◽  
Lithium Nitrate ◽  
Model Predictions ◽  
And Performance

Abstract Although model predictions of thermal energy storage (TES) performance have been explored in several previous investigations, information that allows experimental validation of performance models has been very limited. This is particularly true for high-performance TES designs that facilitate fast input and extraction of energy. In this paper, we present a summary of performance tests of a high-performance TES unit using lithium nitrate trihydrate phase change material (PCM) as a storage medium. Our experimental program also included thorough property determinations and cyclic testing of the PCM. Performance data is presented for complete dual-mode cycles consisting of extraction (melting) followed by charging (freezing). These tests simulate the daylong cyclic operation of a TES unit for asynchronous cooling in a power plant. The model analysis is found to agree very well, within 10%, with the experimental data except for conditions very near the initiation of freezing. Slight deviation from the predicted performance at that time is a consequence of sub-cooling that is required to initiate solidification. The comparisons presented here demonstrate the viability of thermal energy storage for augmentation of power plant air-cooled condensers as well as other potential applications.

scholarly journals Comparison of Model Predictions and Performance Test Data for a Prototype Thermal Energy Storage Module

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Dre Helmns ◽  
Van P. Carey ◽  
Navin Kumar ◽  
Debjyoti Banerjee ◽  
Arun Muley ◽  
...  
Keyword(s):  
Energy Storage ◽  
Test Data ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
High Performance ◽  
Performance Test ◽  
Experimental Tests ◽  
Lithium Nitrate ◽  
Model Predictions ◽  
And Performance

Abstract Although model predictions of thermal energy storage (TES) performance have been explored in previous investigations, relevant test data that enable experimental validation of performance models have been limited. This is particularly true for high-performance TES designs that facilitate fast input and extraction of energy. In this paper, we present a summary of experimental tests of a high-performance TES unit using lithium nitrate trihydrate phase change material as a storage medium. Performance data are presented for complete dual-mode cycles consisting of extraction (melting) followed by charging (freezing). These tests simulate the cyclic operation of a TES unit for asynchronous cooling in a variety of applications. The model analysis is found to agree reasonably well, within 10%, with the experimental data except for conditions very near the initiation of freezing, a consequence of subcooling that is required to initiate solidification.

Design and performance evaluation of a dual-circuit thermal energy storage module for air conditioners

2021 ◽  
Vol 292 ◽  
pp. 116843
Author(s):  
Anurag Goyal ◽  
Eric Kozubal ◽  
Jason Woods ◽  
Malek Nofal ◽  
Said Al-Hallaj
Keyword(s):  
Performance Evaluation ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Air Conditioners ◽  
And Performance

Thermodynamic Performance of Ice Thermal Energy Storage Systems

2000 ◽  
Vol 122 (4) ◽  
pp. 205-211 ◽  
Author(s):  
Marc A. Rosen ◽  
Ibrahim Dincer ◽  
Norman Pedinelli
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Analysis ◽  
Average Energy ◽  
Cooling Capacity ◽  
Energy And Exergy ◽  
Thermodynamic Performance ◽  
And Performance ◽  
Thermal Energy Storage Systems

The thermodynamic performance of an encapsulated ice thermal energy storage (ITES) system for cooling capacity is assessed using exergy and energy analyses. A full cycle, with charging, storing, and discharging stages, is considered. The results demonstrate how exergy analysis provides a more realistic and meaningful assessment than the more conventional energy analysis of the efficiency and performance of an ITES system. The overall energy and exergy efficiencies are 99.5 and 50.9 percent, respectively. The average exergy efficiencies for the charging, discharging, and storing periods are 86, 60, and over 99 percent, respectively, while the average energy efficiency for each of these periods exceeds 99 percent. These results indicate that energy analysis leads to misleadingly optimistic statements of ITES efficiency. The results should prove useful to engineers and designers seeking to improve and optimize ITES systems. [S0195-0738(00)00904-3]

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