Study of heat transformation systems for cooling, heat pumps and desalination
This report studies about UiO66 (Zr) and its functionalised group (-OH, -N, and -NH2) with H2O as compatible working adsorbate-adsorbent pairs that is being deployed in the adsorption assisted heat transformation (AHT) system for cooling, heating, and desalination of water. This report consists of l...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/150705 |
| _version_ | 1811683679622135808 |
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| author | Lee, Jia Wei |
| author2 | Anutosh Chakraborty |
| author_facet | Anutosh Chakraborty Lee, Jia Wei |
| author_sort | Lee, Jia Wei |
| collection | NTU |
| description | This report studies about UiO66 (Zr) and its functionalised group (-OH, -N, and -NH2) with H2O as compatible working adsorbate-adsorbent pairs that is being deployed in the adsorption assisted heat transformation (AHT) system for cooling, heating, and desalination of water. This report consists of literature reviews on AHT system and metal-organic frameworks, thermodynamics modelling, and detailed simulation results. Employing experimentally confirmed isotherms and kinetics data of MOFs – water systems, a simulation study for each component of AHT system is conducted to predict the overall performances of AHT system in terms of specific cooling power, coefficient of performance (for both heating and cooling), specific heating power and specific daily water production. These performance parameters are calculated for various operating conditions such as hot water (heat source) inlet temperature, chilled-water inlet temperature, switching and cycle time. The isotherms and kinetics data are fitted with modified Langmuir equation. The thermodynamic modelling is based on simple mass and energy balance approaches. Hence, a lumped approach is considered for simplicity. The parent UiO66 (Zr) MOFs are not found suitable for cooling applications due to its longer hydrophobic length in the low pressure region with water adsorption. Therefore, MOF-linker-functionalisation strategy is considered. Hence, pyridine, amino, and hydroxyl functional groups based UiO-66 (Zr) MOFs + water assisted AHT are simulated. It is found that -N MOF has improved SDWP of 28 m3 per ton of MOF per day as compared to parent MOF which is only 18 m3 per ton of MOF per day. -OH MOF has SCP of 0.6 kW/kg whereas parent MOF only has 0.04 kW/kg at 80 °C and 500 s half cycle time. -OH MOF has SHP of 1.1 kW/kg whereas parent MOF only has 1 kW/kg at 80 °C and 100 s half cycle time. These results confirm that functionalised UiO-66 (Zr) MOFs are competent candidates for adsorption cooling, heat pump and desalination applications. |
| first_indexed | 2024-10-01T04:16:34Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/150705 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:16:34Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1507052021-12-03T05:42:33Z Study of heat transformation systems for cooling, heat pumps and desalination Lee, Jia Wei Anutosh Chakraborty School of Mechanical and Aerospace Engineering AChakraborty@ntu.edu.sg Science::Physics::Heat and thermodynamics Engineering::Mathematics and analysis::Simulations Science::Mathematics::Applied mathematics::Simulation and modeling Engineering::Mechanical engineering This report studies about UiO66 (Zr) and its functionalised group (-OH, -N, and -NH2) with H2O as compatible working adsorbate-adsorbent pairs that is being deployed in the adsorption assisted heat transformation (AHT) system for cooling, heating, and desalination of water. This report consists of literature reviews on AHT system and metal-organic frameworks, thermodynamics modelling, and detailed simulation results. Employing experimentally confirmed isotherms and kinetics data of MOFs – water systems, a simulation study for each component of AHT system is conducted to predict the overall performances of AHT system in terms of specific cooling power, coefficient of performance (for both heating and cooling), specific heating power and specific daily water production. These performance parameters are calculated for various operating conditions such as hot water (heat source) inlet temperature, chilled-water inlet temperature, switching and cycle time. The isotherms and kinetics data are fitted with modified Langmuir equation. The thermodynamic modelling is based on simple mass and energy balance approaches. Hence, a lumped approach is considered for simplicity. The parent UiO66 (Zr) MOFs are not found suitable for cooling applications due to its longer hydrophobic length in the low pressure region with water adsorption. Therefore, MOF-linker-functionalisation strategy is considered. Hence, pyridine, amino, and hydroxyl functional groups based UiO-66 (Zr) MOFs + water assisted AHT are simulated. It is found that -N MOF has improved SDWP of 28 m3 per ton of MOF per day as compared to parent MOF which is only 18 m3 per ton of MOF per day. -OH MOF has SCP of 0.6 kW/kg whereas parent MOF only has 0.04 kW/kg at 80 °C and 500 s half cycle time. -OH MOF has SHP of 1.1 kW/kg whereas parent MOF only has 1 kW/kg at 80 °C and 100 s half cycle time. These results confirm that functionalised UiO-66 (Zr) MOFs are competent candidates for adsorption cooling, heat pump and desalination applications. Bachelor of Engineering (Mechanical Engineering) 2021-06-02T07:20:17Z 2021-06-02T07:20:17Z 2021 Final Year Project (FYP) Lee, J. W. (2021). Study of heat transformation systems for cooling, heat pumps and desalination. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/150705 https://hdl.handle.net/10356/150705 en B231 application/pdf Nanyang Technological University |
| spellingShingle | Science::Physics::Heat and thermodynamics Engineering::Mathematics and analysis::Simulations Science::Mathematics::Applied mathematics::Simulation and modeling Engineering::Mechanical engineering Lee, Jia Wei Study of heat transformation systems for cooling, heat pumps and desalination |
| title | Study of heat transformation systems for cooling, heat pumps and desalination |
| title_full | Study of heat transformation systems for cooling, heat pumps and desalination |
| title_fullStr | Study of heat transformation systems for cooling, heat pumps and desalination |
| title_full_unstemmed | Study of heat transformation systems for cooling, heat pumps and desalination |
| title_short | Study of heat transformation systems for cooling, heat pumps and desalination |
| title_sort | study of heat transformation systems for cooling heat pumps and desalination |
| topic | Science::Physics::Heat and thermodynamics Engineering::Mathematics and analysis::Simulations Science::Mathematics::Applied mathematics::Simulation and modeling Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/150705 |
| work_keys_str_mv | AT leejiawei studyofheattransformationsystemsforcoolingheatpumpsanddesalination |