Browse > Article

Study on the Comparison of Heat Exchange Performance of Liquefied Gas Vaporizer at Super Low Temperature  

Kim, Pil-Hwan (Graduate School of Department of Mechanical Engineering, Gyeoungsang National University)
Kim, Chul-Pyo (Graduate School of Department of Mechanical Engineering, Gyeoungsang National University)
Jeong, Hyo-Min (Department of Mechanical Engineering, Gyoungsang National University)
Chung, Han-Shik (Department of Mechanical Engineering, Gyoungsang National University)
Lee, Yong-Hun (Institute of Nature and Environmental Technology, Kanazawa University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.20, no.10, 2008 , pp. 679-688 More about this Journal
Abstract
Air-heating vaporizer usually is used to regasify LNG at satellite areas because of the small demand of natural gas there. The common type of air heating vaporizer which exists in the market is the longitudinally finned type with 8 fins, 55 mm fin length and 2mm fin thickness. To contribute in developing an efficient air-heating vaporizer, experiment on finned type air-heating vaporizer using 8 fins, 50mm(fin length) with 2 mm(fin thickness) which exist in the market and 4 fins, 75 mm(fin length) with 2 mm(fin thickness), which is proposed, were conducted. Then, both types of vaporizers are compared. The experiments were conducted in one hour by varying the ambient condition and the length of the vaporizer. The ambient air was controlled so that it has the same temperature, humidity and air velocity with air condition in every season available and the length was varied 4000 mm, 6000 mm and 8000 mm for each type of vaporizer. Additional experiment with longer duration, i.e. In this experiment, the main aspects in analyzing the characteristics of the air heating vaporizer the inlet-outlet enthalpy difference and the outlet temperature of the working fluid. $LN_2$ is used to substitute LNG because of safety reason. The results show that the characteristics of the finned type 4fin75le vaporizer are comparable to finned type 8fin50le vaporizer.
Keywords
Fin$LN_2$; Liquified gas; Super low temperature; Vaporizer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Kim, N. J., Kim, C. B., Yun S. M. and Han, S. T., 1994, A study on boiling characteristics of direct contact LNG evaporator, SAREK, Winter Conference, pp. 380-385
2 NIST on-line Thermo-physical Properties of Fluid System(http://webbook.nist.gov)
3 Kim, Y. S., Cho, C. H., Kim, Hyo, Lee, J. H. and Mok, Y. I., 1994, A study on the calculation of basic thermodynamic properties of LNG/NG, Energy Eng. J, Vol. 3, No. 2, pp. 256-264
4 Kong, T. W., 2006, Study on the air vaporizer for liquefied gas with super low temperature, A Doctor's Thesis, Department of Mechanical and Precision Engineering Graduate School, Gyeonsang National University
5 Lee, S. C., Kong, T. W., Yi, C. S., Jeong, H. M. and Chung, H. S., 2006, Optimum design of vaporizer fin with liquefied natural gas by Numerical Analysis, KSME Int. J, Vol. 20, No. 4, pp. 546-553   과학기술학회마을   DOI   ScienceOn
6 Lee, G. S., Chang, Y. S. and Ro, S. T., 1995, Thermodynamic analysis of the extraction process and the cold energy utilization of LNG, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 7, No. 1, pp. 120-131
7 Lee, S. C., 2006, Study on the air vaporizer for liquefied gas with super low temperature, A Doctor's Thesis, Department of Mechanical and Precision Engineering Graduate School, Gyeonsang National University
8 Choi, K. I. and Chung, H. M., 2000, Analysis of a cryogenic Nitrogen-Ambient air heat exchanger including frost formation, SAREK, Vol. 12, No. 9, pp. 825-834   과학기술학회마을
9 Park, J. S. and Chang, H. M., 1997, LNG analysis and design of LNG open rack vaporizer, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 9, No. 2, pp. 189-197
10 Yoon, J. I., 2001, Trends of research and development of LNG cold, Journal of the KSPSE, Vol. 5, No. 4, pp. 5-10
11 ANSI/ASME 1985, Measurement Uncertainty, ASME performance test codes supplement on instruments and apparatus, Part I