Thermal Energy Discharge Characteristics of a PCM Heat Exchanger with Calcium Chloride Hexahydrate

Calcium chloride hexahydrate (CaCl2•6H2O) is an important inorganic phase change material used for thermal energy storage or discharge at lower storage temperature. Thermal energy discharge characteristics of a new type of PCM heat exchanger were investigated after thermal energy storage, in which its main body is based on the traditional structure of a shell-and-tube heat exchanger, and is full of PCMs (CaCl2•6H2O) in the tubes. The cold air of 16-17°C with different velocities flowed through the PCM heat exchanger, the temperature distributions of all the test points were measured by means of the experimetal system. The experimental results showed that, since the latent heat of phase transition in the tubes was so large during the process of thermal energy discharge, the time intervals of air temperature that maintained beyond 20°C at the outlet of the PCM heat exchanger were respectively 594min and 717min when the mass velocities of the cold air were 0.132 kg/s and 0.096kg/s, which is one of the important characteristics in the structure of this type of PCM heat exchanger. It can be used in the situations of temperature control or maintenance at the certain temperature, such as greenhouses, air conditioning etc.

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Experimental Research on Thermal Energy Storage of a New Type of PCM Heat Exchanger

MRS Proceedings ◽

10.1557/proc-1100-jj04-20 ◽

2008 ◽

Vol 1100 ◽

Author(s):

Zhu Xiaoqin ◽

Hu Jin ◽

Li Nanjing ◽

Wang Panpan ◽

Lu Jiansheng ◽

...

Keyword(s):

Energy Storage ◽

Heat Exchanger ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

Storage Temperature ◽

Waste Heat ◽

Main Body ◽

Tube Heat Exchanger ◽

New Type

AbstractThermal energy storage with phase change materials is one of the most efficient means of storing available energy because of its advantages such as providing higher thermal storage capacity, lower storage temperature, isothermal operation and less storage space. Thermal energy storage property of a new type of PCM heat exchanger was investigated, in which its main body is based on the traditional structure of a shell-and-tube heat exchanger, and is full of PCMs (CaCl2·6H2O) in the tubes. The hot air at the temperature of 40° was selected as a flow medium, and the temperature measurements of the test points were carried out at the inlet and outlet of this kind of PCM heat exchanger. The experimental results showed that this kind of PCM heat exchanger could store thermal energy from the hot fluid by means of PCMs in the tubes. Its prospect in engineering applications such as the recovery and utilizations of industrial afterheat or waste heat etc was also analyzed and forecasted.

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Comparison of Thermal Performance of 3 D Printed Shell and Tube Heat Exchanger With Commercial Plate Heat Exchanger for Thermal Energy Storage (Tes) by Incorporating Phase Change Materials (Pcm)

10.1115/1.0001430v ◽

2021 ◽

Author(s):

Debjyoti Banerjee ◽

Ashok Thyagarajan ◽

Nandan Shettigar

Keyword(s):

Energy Storage ◽

Heat Exchanger ◽

Thermal Performance ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

Plate Heat Exchanger ◽

Plate Heat ◽

Tube Heat Exchanger ◽

Shell And Tube

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Solid/Liquid Phase Change Heat Transfer in Latent Heat Thermal Energy Storage

ASME 2009 3rd International Conference on Energy Sustainability, Volume 2 ◽

10.1115/es2009-90052 ◽

2009 ◽

Cited By ~ 2

Author(s):

D. Zhou ◽

C. Y. Zhao

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Energy Storage ◽

Phase Change ◽

Calcium Chloride ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

Metal Foams ◽

Chloride Hexahydrate

Phase change materials (PCMs) have been widely used for thermal energy storage systems due to their capability of storing and releasing large amounts of energy with a small volume and a moderate temperature variation. Most PCMs suffer the common problem of low thermal conductivity, being around 0.2 and 0.5 for paraffin and inorganic salts, respectively, which prolongs the charging and discharging period. In an attempt to improve the thermal conductivity of phase change materials, the graphite or metallic matrix is often embedded within PCMs to enhance the heat transfer. This paper presents an experimental study on heat transfer characteristics of PCMs embedded with open-celled metal foams. In this study both paraffin wax and calcium chloride hexahydrate are employed as the heat storage media. The transient heat transfer behavior is measured. Compared to the results of pure PCMs samples, the investigation shows that the additions of metal foams can double the overall heat transfer rate during the melting process. The results of calcium chloride hexahydrate are also compared with those of paraffin wax.

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Designs of PCM based heat exchangers constructions for thermal energy storage tanks – examples and case study for selected design

E3S Web of Conferences ◽

10.1051/e3sconf/20187001010 ◽

2018 ◽

Vol 70 ◽

pp. 01010

Author(s):

Marta Kuta ◽

Dominika Matuszewska ◽

Tadeusz Michał Wójcik

Keyword(s):

Energy Storage ◽

Heat Exchanger ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

New Technologies ◽

Tube Heat Exchanger ◽

Change Material

Increasing energy consumption in residential and public buildings requires development of new technologies for thermal energy production and storage. One of possibilities for the second listed need is the use of phase change materials (PCMs). This work is focused on solutions in this area and consists of two parts. First one is focused on different designs of thermal energy storage (TES) tanks based on the phase change materials. The second part is the analysis of tests results for TES tank containing shelf and tube heat exchanger and filled with phase change material. Thermal energy storage tank is analyzed in order to use it in domestic heating and hot utility water installations. The aim of this research was to check the applicability of phase change material for mentioned purpose. Results show that using phase change materials for thermal energy storage can increase amount of stored heat. The use of properly selected PCM and heat exchanger enables the process of thermal energy storing and releasing to become more efficient.

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