An investigation of the thermal energy storage capacity of Glauber's salt with respect to thermal cycling

Marks, Stephen B.

doi:10.1016/0038-092x(80)90332-1

Cited by 80 publications

(38 citation statements)

References 7 publications

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“…Glauber's salt was studied by Marks [58] and Porosini [44]. Despite the analysis methods and the cycling time being different, the same initial melting point was found in both studies.…”

Section: Salt Hydratesmentioning

confidence: 85%

“…However, the study by Porosini [44] was not focused on determining the heat storage capacity of the salt, hence, no other information but the cycling time and melting point was given in the paper. On the other hand, Marks [58] measured the initial latent heat of fusion and melting point using a calorimeter and cycled the samples in a thermal cycling chamber. The initial melting point and latent heat of fusion results are enclosed in the former Table 5 and the only information reported in the paper after 200 cycles is the latent heat of fusion that decreased until 105 J/g, losing a 56% of its storage capacity.…”

Section: Salt Hydratesmentioning

confidence: 99%

See 1 more Smart Citation

Review on the methodology used in thermal stability characterization of phase change materials

Ferrer

Solé

Barreneche

et al. 2015

Renewable and Sustainable Energy Reviews

118

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a b s t r a c tIn general, PCM are classified in organic and inorganic groups or families. First group mainly encloses paraffin, fatty acids, and sugar alcohols. Inorganic are mostly represented by salt hydrates, salt solutions, and metals. Eutectics and mixtures are also being formulated to obtain a desired phase change temperature. One of the most important PCM requirements is being stable after a number of repeated melting/freezing cycles, which is known as cycling stability. A PCM should present the same or almost the same thermal, chemical and physical properties after a repeated number of freezing and melting cycles. Thermal cycling tests results and detailed tests procedures are classified by PCM type in this review. Moreover, the parameters that must be considered in order to perform cycling stability tests are highlighted depending on the importance they have on the following four issues: the choice of the equipment to perform the cycling tests; the selection of the techniques to characterize the PCM before and after thermal cycling test and to follow the PCM thermal degradation; the definition of the number of cycles to perform; and finally, the choice of the heating rate and thermal cycling method (pyramid, or dynamic, or others) to perform the tests. It is mandatory to conclude that, based on the literature reviewed, no common standard for thermal cycling stability tests is available at the moment.

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“…Glauber's salt was studied by Marks [58] and Porosini [44]. Despite the analysis methods and the cycling time being different, the same initial melting point was found in both studies.…”

Section: Salt Hydratesmentioning

confidence: 85%

Section: Salt Hydratesmentioning

confidence: 99%

Review on the methodology used in thermal stability characterization of phase change materials

Ferrer

Solé

Barreneche

et al. 2015

Renewable and Sustainable Energy Reviews

118

View full text Add to dashboard Cite

show abstract

“…A significant decrease in latent heat was observed after only three cycles in Glauber's salt with 1% borax added; the authors suggested that the decrease in latent heat with increasing cycle number and the loss of heat storage capacity may be due to decomposition into anhydrous and supernatant layers, and thus incongruent melting behavior of the salt. In another study where borax was used as nucleating agent and attapulgite clay was used as thickener, the thermal capacity declined slowly from its initial value during thermal cycles and the author concluded that both pure Glauber's salt and the thickened mixture were unfit for long‐term use as latent heat storage materials …”

Section: Results and Di̇scussi̇onmentioning

confidence: 99%

Passive temperature control of an outdoor photobioreactor by phase change materials

Uyar

Kapucu

2014

J of Chemical Tech & Biotech

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BACKGROUND: Photobioreactors operated under sunlight require a temperature control system. Proposed cooling/heating systems increase the cost of the bioprocess due to their intensive energy utilization or the decrease in bioprocess efficiency they cause. In this study, a novel solar photobioreactor was developed in which phase change materials are employed for controlling the temperature without using external energy. The system was tested in outdoor conditions using Rhodobacter capsulatus as a model photosynthetic microorganism.

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“…According to this review, most tested PCMs are intended for storage applications at temperatures below 100°C. Those PCMs include pure substances, eutectic mixtures, and composites that undergo either solid‐liquid or solid‐solid phase transitions. In contrast, only few stability studies have been found for PCMs intended to temperature applications above 100°C.…”

Section: Introductionmentioning

confidence: 99%

“…In order to perform cycling tests, some authors used differential scanning calorimetry (DSC), whereas the majority used set‐ups adapted and/or designed on purpose. Those set‐ups included thermostatic chambers, thermal water baths, electric hot plates with temperature control, weathering chambers, ovens with controlled heating, and, in few cases, also with a cooling control . The advantage of using a DSC apparatus for thermal cycling is that phase change temperature ( T ph‐ch ) and calculated enthalpy (Δ H ph‐ch ) are recorded directly for each cycle, so that their evolution can be monitored without interrupting the test or removing the sample.…”

Section: Introductionmentioning

confidence: 99%

Development of a new methodology for validating thermal storage media: Application to phase change materials

Bayón

Rojas

2019

Int J Energy Res

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Summary Long‐term stability and long‐term performance of thermal storage media are a key issue that should be thoroughly analysed when developing storage systems. However, no testing protocol or guideline exists up to now for validating storage media, so that authors apply their own criteria, not only for designing testing procedures but also for predicting the material behaviour under long‐term operation. This paper aims to cover this gap by proposing a methodology for validating thermal storage media; in particular, phase change materials (PCMs). This methodology consists of different stages that include PCM characterization, preliminary assessment tests, and accelerated life testing. For designing the accelerated life tests, lifetime relationship models have to be obtained in order to predict PCM long‐term behaviour under service conditions from shorter tests performed under stress conditions. The approach followed in this methodology will be valid for materials to be used as sensible or thermochemical storage media, too.

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An investigation of the thermal energy storage capacity of Glauber's salt with respect to thermal cycling

Cited by 80 publications

References 7 publications

Review on the methodology used in thermal stability characterization of phase change materials

Review on the methodology used in thermal stability characterization of phase change materials

Passive temperature control of an outdoor photobioreactor by phase change materials

Development of a new methodology for validating thermal storage media: Application to phase change materials

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