Experimental investigation of a latent heat storage for solar cooling applications

Palomba, Valeria; Brancato, Vincenza; Frazzica, Andrea

doi:10.1016/j.apenergy.2017.05.037

Cited by 48 publications

(29 citation statements)

References 31 publications

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“…Another promising application for adsorption chillers is thermal storage [13,14]. Moreover, an adsorption desalination system can also be connected with Multi Effect Distillation (MED) as a hybrid process [15].…”

Section: Introductionmentioning

confidence: 99%

Design and experimental study of a small scale adsorption desalinator

2019

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• Design and experimental results of the world's most compact adsorption desalinator for the first time • Achieving a Specific Daily Water Production of 7.7 kg w /(kg sg d) and Performance Ratio of 0.6 • The small scale is not detrimental to the performance as the system is on a par with the best performing system in the literature • A novel thermal response experiment informs about the partition of energy, the heat of adsorption, and water production

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Section: Introductionmentioning

confidence: 99%

Design and experimental study of a small scale adsorption desalinator

2019

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“…Bedecarrats et al [24] and Avignon and Kummert [25] experimentally observed that interrupting heating/cooling processes before the PCM was completely melted or solidified also had an effect on the phase change temperature and on the degree of subcooling. Palomba et al [26] noticed that the level of charge, or discharge, in incomplete phase change processes influenced their subsequent processes. Finally, in a previous study carried out by Gasia et al [27], five percentage of charge (58%, 73%, 83%, 92%, and 97%) and their influence on the discharging process were evaluated in a latent heat TES system.…”

Section: Introductionmentioning

confidence: 99%

Influence of the storage period between charge and discharge in a latent heat thermal energy storage system working under partial load operating conditions

et al. 2019

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The supply intermittency of energy sources like solar energy or industrial waste heat should be properly addressed when studying latent heat thermal energy storage (TES) systems, since it might cause an incomplete melting/solidification of phase change materials (PCM). In the present paper, and experimental study was performed to analyse the storage period (also known as stand-by period) in a latent heat TES system working under partial load operating conditions and the effect of its duration on the subsequent discharging process. In the experimental set-up, 99.5 kg of high density polyethylene (HDPE) was used as PCM in a 0.154 m 3 storage tank based on the shell-and-tube heat exchanger concept. Four different percentages of charge were evaluated: 58%, 73%, 83% (partial charge), and 97% (full charge). Each charging level was followed by three different periods of storage: 25 min, 60 min, and 120 min. The fact of working at different levels of charge caused that in some regions of the TES system the PCM was not completely melted. Thus, at the end of the charging process different levels of thermal homogenisation were observed. However, during the storage period, the PCM temperature showed a tendency to homogenisation, which was influenced by the energy distribution within the PCM, the heat losses, and the duration of the storage period. Focusing on the discharging period, it was observed that the duration of the storage period slightly affected the temperature and heat transfer profiles, causing the main differences of performance during the first 30 min of process.

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“…On the other side, literature review showed that some research was also performed to study the influence of partial load operating conditions in latent heat TES systems [9][10][11][12][13][14][15][16][17][18][19][20]. It is known that when a PCM goes through consecutive melting and solidification processes, it might show specific effects such as hysteresis and/or subcooling.…”

Section: Introductionmentioning

confidence: 99%

“…He observed that the curve was placed between the cooling and heating curves at a distance and with a slope which depended on the TES system operating conditions (points a-b-e-f in Figure 1b). Palomba et al [13] experimentally evaluated three short consecutive charging and discharging processes in a latent heat TES system for solar cooling purposes to study the effect of starting a new process without fully melting/solidifying the PCM. They observed that better results could be obtained with longer processes, mainly in the first discharge/charge.…”

Section: Introductionmentioning

confidence: 99%