Influence of collector heat capacity and internal conditions of heat exchanger on cool-down process of small gas liquefier
| Autor: | Mohammad Mahdi Bahri Rasht Abadi, Ali Saberimoghaddam |
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| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Plate heat exchanger Thermodynamics 02 engineering and technology Mechanics Heat sink Condensed Matter Physics Concentric tube heat exchanger 01 natural sciences Heat capacity rate 020401 chemical engineering 0103 physical sciences Heat spreader Regenerative heat exchanger Plate fin heat exchanger 0204 chemical engineering 010306 general physics Shell and tube heat exchanger |
| Zdroj: | Heat and Mass Transfer. 54:163-175 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-017-2115-3 |
| Popis: | Joule-Thomson cooling systems are commonly used in gas liquefaction. In small gas liquefiers, transient cool-down time is high. Selecting suitable conditions for cooling down process leads to decrease in time and cost. In the present work, transient thermal behavior of Joule-Thomson cooling system including counter current helically coiled tube in tube heat exchanger, expansion valve, and collector was studied using experimental tests and simulations. The experiments were performed using small gas liquefier and nitrogen gas as working fluid. The heat exchanger was thermally studied by experimental data obtained from a small gas liquefier. In addition, the simulations were performed using experimental data as variable boundary conditions. A comparison was done between presented and conventional methods. The effect of collector heat capacity and convection heat transfer coefficient inside the tubes on system performance was studied using temperature profiles along the heat exchanger. |
| Databáze: | OpenAIRE |
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