Study on the performance of heat storage and heat release of water storage tank with PCMs

Lu, Shilei; Zhang, Tianshuai; Chen, Yafei

doi:10.1016/j.enbuild.2017.10.059

Cited by 40 publications

(8 citation statements)

References 11 publications

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“…In turn, for the tank filled with water it was equal to about 2.1 m 3 . S. Lu et al in [9] analyzed the work of a tank with two different PCM materials that had different melting points. The results show that this type of solution significantly reduces the charging time of a tank due to the better use of the potential of the power source.…”

Section: Introductionmentioning

confidence: 99%

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

et al. 2020

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An important element of a solar installation is the storage tank. When properly selected and operated, it can bring numerous benefits. The presented research relates to a project that is implemented at the Solar Energy Research Center of the University of Almeria in Spain. In order to improve the operation of the solar cooling and heating system of the Center, it was upgraded with two newly designed storage tanks filled with phase change materials (PCM). As a result of design works, commercial material S10 was selected for the accumulation of cold, and S46 for the accumulation of heat, in an amount of 85% and 15%, respectively. The article presents in detail the process of selecting the PCM material, designing the installation, experimental research, and exergy analysis. Individual tasks were carried out by research groups cooperating under the PCMSOL EUROPEAN PROJECT. Results of tests conducted on the constructed installation indicate that daily energy saving when using a solar chiller with PCM tanks amounts to 40% during the cooling season.

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Section: Introductionmentioning

confidence: 99%

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

et al. 2020

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“…When temperature is lower than the melting point, the process is reversed. Because of the flexibility of storing up energy, lots of PCM researches have been carried out integrated with other fields, such as solar energy, hot water, heat pump, and building conservation . With reliving energy tension and promoting energy utilization, PCM is another revolution of material industry since nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage

Han

Zhang

et al. 2019

Int J Energy Res

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Summary Composite expended graphite (EG)/Ba(OH)2·8H2O form‐stable phase change material (PCM) is prepared with porous adsorption method in this study to solve the problem of the leakage risk in the application process based on barium hydroxide octahydrate. In addition, the thermal properties and stability have been measured and verified. Thermal conductivity of each group composite material was enhanced by about two to four times, while the addition has little negative effect on the other properties. With microscopic features being characterized by scanning electron microscope (SEM), the experimental result demonstrates that the composite material with 7 wt% of EG is optimal to be a saturated state between two phases. After the thermal cyclings of 100, 300, and 500 times, thermal properties did not change dramatically, which can be used as an ideal material for solar thermal storage system within finite thermal cyclings. In order to simulate the operating condition of solar energy or waste heat storage, the composite material was encapsulated in the heat storage unit with pipe bundle, and heat storage/release experiences were performed to test the performance of the material and hot water supply. The results indicate that the composite material is qualified to storage and release sufficient heat. The experimental data can provide necessary technical reference for engineering design and effect prediction in practical application.

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“…Issues concerning the choice of material and the construction of the latent heat thermal energy storage systems (LHTESS) have already been described, e.g., in [29]. Although PCM storage tanks are well described for water storage tanks for heating or hot water systems [30,31] as well as heat pumps [32], their integration with a ventilation unit has still not been adequately studied. The latest reports show that the heat can be effectively transferred through ventilated air and storage in the PCM activated concrete blocks [33].…”

Section: Introductionmentioning

confidence: 99%

Peripheral Isothermal System of Heat Gain Storage for Thermal Stability in Low-Energy Buildings

2019

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The problem of heat storage in low- or ultra-low-energy houses is becoming a crucial issue. The general purpose of this study was to determine the potential for utilising heat gain recovery in a building. The proposed solution is based on an auxiliary latent heat storage tank using paraffin RT24. The tank is connected to an integrated heat recovery system that supplies heat from the internal loop of a mechanical ventilation system. The storage capacity of the tank was determined using the proposed parameter “excess of heat gains” of the thermal zone, and was obtained by measurement. The detailed construction of the tank, the phase change material properties and the quantity were proposed. The data that was collected allowed for the calculation of the temporary charging level as well as the overall seasonal energy stored in the tank. It was shown that during the heating season, the temperature could rise above the set-up value of 20 °C by as much as 8 K at maximum. Although the analysed building was characterised by heavy construction and high thermal mass, the additional heat could be effectively stored and utilised to cover the energy demand of the zone at the level of 88 MJ/a and 208 MJ/a, depending on the airflow rate between the rooms and the heat exchanger, for 140 and 420 m3/h, respectively. The expected energy effect for a low thermal mass construction, e.g., a timber frame was much higher and the results obtained by using the numerical simulation were 116 MJ/a for 140 m3/h, and 273 MJ/a for 420 m3/h, respectively.

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Study on the performance of heat storage and heat release of water storage tank with PCMs

Cited by 40 publications

References 11 publications

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage

Peripheral Isothermal System of Heat Gain Storage for Thermal Stability in Low-Energy Buildings

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Study on the performance of heat storage and heat release of water storage tank with PCMs

Cited by 40 publications

References 11 publications

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Preparation and application of composite EG/Ba(OH)2 ·8H2 O form-stable phase change material for solar thermal storage

Peripheral Isothermal System of Heat Gain Storage for Thermal Stability in Low-Energy Buildings

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Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage