Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method
This paper details an experimental study that was performed to investigate the specific heat of microencapsulated phase change material (mPCM) slurry and its heat of fusion at the PCM phase change transition temperature. Six samples (mPCM slurry concentrate with the water solution of propylene glyco...
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MDPI AG
2020-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/1/179 |
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| author | Krzysztof Dutkowski Marcin Kruzel Bartosz Zajączkowski |
| author_facet | Krzysztof Dutkowski Marcin Kruzel Bartosz Zajączkowski |
| author_sort | Krzysztof Dutkowski |
| collection | DOAJ |
| description | This paper details an experimental study that was performed to investigate the specific heat of microencapsulated phase change material (mPCM) slurry and its heat of fusion at the PCM phase change transition temperature. Six samples (mPCM slurry concentrate with the water solution of propylene glycol used as a main base liquid) were prepared. As the concentrate contains 43.0% mPCM, the actual mass fraction amounts to 8.6, 12.9, 17.2, 21.5, 25.8, and 30.1 wt%, respectively. The thermal delay method was used. Samples were cooled from 50 °C to 10 °C. A higher concentration of microcapsules caused a proportional increase in the specific heat of slurry at the main peak melting temperature. The maximum value of the specific heat changed from 9.2 to 33.7 kJ/kg for 8.6 wt%, and 30.1 wt%, respectively. The specific heat of the mPCM slurry is a constant quantity and depends on the concentration of the microcapsules. The specific heat of the slurry (PCM inside microcapsules in a liquid form) decreased from 4.0 to 3.8 kJ/(kgK) for 8.6 wt%, and 30.1 wt% of mPCM, respectively. The specific heat of the slurry (PCM inside microcapsules in a liquid form) was higher than when the PCM in the microcapsules is in the form of a solid and increased from 4.5 to 5.2 kJ/(kgK) for 8.6 wt% and 30.1 wt% of mPCM, respectively. |
| first_indexed | 2024-03-10T13:35:15Z |
| format | Article |
| id | doaj.art-d76d61913215403e9b7e5d9d38cd5535 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T13:35:15Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-d76d61913215403e9b7e5d9d38cd55352023-11-21T07:34:58ZengMDPI AGEnergies1996-10732020-12-0114117910.3390/en14010179Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay MethodKrzysztof Dutkowski0Marcin Kruzel1Bartosz Zajączkowski2Faculty of Mechanical Engineering, Koszalin University of Technology, ul. Raclawicka 15-17, 75-620 Koszalin, PolandFaculty of Mechanical Engineering, Koszalin University of Technology, ul. Raclawicka 15-17, 75-620 Koszalin, PolandDepartment of Thermal Sciences, Wroclaw University of Science and Technology, 50-370 Wroclaw, PolandThis paper details an experimental study that was performed to investigate the specific heat of microencapsulated phase change material (mPCM) slurry and its heat of fusion at the PCM phase change transition temperature. Six samples (mPCM slurry concentrate with the water solution of propylene glycol used as a main base liquid) were prepared. As the concentrate contains 43.0% mPCM, the actual mass fraction amounts to 8.6, 12.9, 17.2, 21.5, 25.8, and 30.1 wt%, respectively. The thermal delay method was used. Samples were cooled from 50 °C to 10 °C. A higher concentration of microcapsules caused a proportional increase in the specific heat of slurry at the main peak melting temperature. The maximum value of the specific heat changed from 9.2 to 33.7 kJ/kg for 8.6 wt%, and 30.1 wt%, respectively. The specific heat of the mPCM slurry is a constant quantity and depends on the concentration of the microcapsules. The specific heat of the slurry (PCM inside microcapsules in a liquid form) decreased from 4.0 to 3.8 kJ/(kgK) for 8.6 wt%, and 30.1 wt% of mPCM, respectively. The specific heat of the slurry (PCM inside microcapsules in a liquid form) was higher than when the PCM in the microcapsules is in the form of a solid and increased from 4.5 to 5.2 kJ/(kgK) for 8.6 wt% and 30.1 wt% of mPCM, respectively.https://www.mdpi.com/1996-1073/14/1/179PCMmicroencapsulationthermal delay methodspecific heat |
| spellingShingle | Krzysztof Dutkowski Marcin Kruzel Bartosz Zajączkowski Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method Energies PCM microencapsulation thermal delay method specific heat |
| title | Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method |
| title_full | Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method |
| title_fullStr | Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method |
| title_full_unstemmed | Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method |
| title_short | Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method |
| title_sort | determining the heat of fusion and specific heat of microencapsulated phase change material slurry by thermal delay method |
| topic | PCM microencapsulation thermal delay method specific heat |
| url | https://www.mdpi.com/1996-1073/14/1/179 |
| work_keys_str_mv | AT krzysztofdutkowski determiningtheheatoffusionandspecificheatofmicroencapsulatedphasechangematerialslurrybythermaldelaymethod AT marcinkruzel determiningtheheatoffusionandspecificheatofmicroencapsulatedphasechangematerialslurrybythermaldelaymethod AT bartoszzajaczkowski determiningtheheatoffusionandspecificheatofmicroencapsulatedphasechangematerialslurrybythermaldelaymethod |