Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant
A numerical study has been carried out for straight, spiral and helical capillary tubes and their performance has been compared with CO2 refrigerant. The numerical models are developed based on the fundamental conservation principles of mass, momentum, and energy. Within this, outer loop, the ordin...
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| Format: | Article |
| Language: | English |
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Saint Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University)
2022-08-01
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| Series: | Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki |
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| Online Access: | https://ntv.ifmo.ru/file/article/21374.pdf |
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| author | Pravin Jadhav Anjan Kumar Sahu Sunita Ballal |
| author_facet | Pravin Jadhav Anjan Kumar Sahu Sunita Ballal |
| author_sort | Pravin Jadhav |
| collection | DOAJ |
| description | A numerical study has been carried out for straight, spiral and helical capillary tubes and their performance has been
compared with CO2 refrigerant. The numerical models are developed based on the fundamental conservation principles of mass, momentum, and energy. Within this, outer loop, the ordinary differential equations are solved from the inlet to the exit of the capillary tube. The study has been carried out to calculate the mass flow rate by bisection method where the mass is iteratively calculated at the specified capillary length or vice versa. In-house coding programming employs the finite difference approach for numerical solutions. The characterization of the capillary tube has been done by calculating the length for the given mass or by calculating mass for the given length. The comparison of the straight capillary with helical capillary tube (50 mm coil diameter) and spiral capillary tube (50 mm pitch) has been reported. For a change in tube diameter, surface roughness, and length, the percentage reduction in mass flow rate in capillary tubes (straight, helical, and spiral) is calculated. The percentage reduction in mass in a helical capillary tube compared to the straight capillary tube is about 7–9 %. The percentage reduction in mass in a spiral tube compared to the straight capillary tube
is nearly 23–26 %. Additionally, the percentage reduction in mass in a spiral tube compared to the helical capillary tube
is almost 17–19 %. Additionally, the percentage reduction in length in a spiral tube compared to straight capillary tube
ranges from 37 % to 43 %. Similarly, the percentage reduction in length in a spiral tube compared to helical capillary tube is ranging from 25 % to 32 %. |
| first_indexed | 2024-04-11T22:24:40Z |
| format | Article |
| id | doaj.art-6c73b326536c4b4eb0707fd3cc9a7697 |
| institution | Directory Open Access Journal |
| issn | 2226-1494 2500-0373 |
| language | English |
| last_indexed | 2024-04-11T22:24:40Z |
| publishDate | 2022-08-01 |
| publisher | Saint Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University) |
| record_format | Article |
| series | Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki |
| spelling | doaj.art-6c73b326536c4b4eb0707fd3cc9a76972022-12-22T03:59:47ZengSaint Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University)Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki2226-14942500-03732022-08-0122480481110.17586/2226-1494-2022-22-4-804-811Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerantPravin Jadhav0https://orcid.org/0000-0002-8043-8883Anjan Kumar Sahu1https://orcid.org/0000-0003-4385-1326Sunita Ballal2https://orcid.org/0000-0002-8392-8095PhD (Mech. Eng.), Assistant Professor, Karamveer Bhaurao Patil College of Engineering, Satara, 415001, India, sc 57197261154PhD (Mech. Eng.), Professor, Majhighariani Institute of Technology and Science, Rayagada, Odisha, 765017, India, sc 57201214117M.Sc (Mathematics), Head of Department, Karamveer Bhaurao Patil College of Engineering, Satara, 415001, IndiaA numerical study has been carried out for straight, spiral and helical capillary tubes and their performance has been compared with CO2 refrigerant. The numerical models are developed based on the fundamental conservation principles of mass, momentum, and energy. Within this, outer loop, the ordinary differential equations are solved from the inlet to the exit of the capillary tube. The study has been carried out to calculate the mass flow rate by bisection method where the mass is iteratively calculated at the specified capillary length or vice versa. In-house coding programming employs the finite difference approach for numerical solutions. The characterization of the capillary tube has been done by calculating the length for the given mass or by calculating mass for the given length. The comparison of the straight capillary with helical capillary tube (50 mm coil diameter) and spiral capillary tube (50 mm pitch) has been reported. For a change in tube diameter, surface roughness, and length, the percentage reduction in mass flow rate in capillary tubes (straight, helical, and spiral) is calculated. The percentage reduction in mass in a helical capillary tube compared to the straight capillary tube is about 7–9 %. The percentage reduction in mass in a spiral tube compared to the straight capillary tube is nearly 23–26 %. Additionally, the percentage reduction in mass in a spiral tube compared to the helical capillary tube is almost 17–19 %. Additionally, the percentage reduction in length in a spiral tube compared to straight capillary tube ranges from 37 % to 43 %. Similarly, the percentage reduction in length in a spiral tube compared to helical capillary tube is ranging from 25 % to 32 %.https://ntv.ifmo.ru/file/article/21374.pdfstraight tubehelical tubespiral tubecapillary tubeadiabaticmass flow rate |
| spellingShingle | Pravin Jadhav Anjan Kumar Sahu Sunita Ballal Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki straight tube helical tube spiral tube capillary tube adiabatic mass flow rate |
| title | Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant |
| title_full | Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant |
| title_fullStr | Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant |
| title_full_unstemmed | Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant |
| title_short | Numerical study on the straight, helical and spiral capillary tube for the CO2 refrigerant |
| title_sort | numerical study on the straight helical and spiral capillary tube for the co2 refrigerant |
| topic | straight tube helical tube spiral tube capillary tube adiabatic mass flow rate |
| url | https://ntv.ifmo.ru/file/article/21374.pdf |
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