Advances in Cryogenic Engineering pp 1599-1606 | Cite as
Thermal Performance of a Double-Tube Type Lng Vaporizer
Abstract
This report concerns the confirmed test results and method of analysis of the thermal performance of a double-tube type LNG vaporizer (DTV). The DTV is a base-load vaporizer which consists of panels formed with double tubes laid out vertically. Sea water is the heating medium.
To check the DTV thermal performance, we used single six meter long double tubes. Several types of insulation materials were attached on the outside of the upper part of the tubes. We measured the outlet gas temperature and the required water/LNG ratio. We found a tradeoff between the outlet gas temperature and required water/LNG ratio; i.e., lengthening the insulation to raise the outlet gas temperature increased the required water/LNG ratio.
We used difference calculus to analyze steady thermal performance. Taking the nonlinearity of heat transfer coefficients and physical property values into consideration, we obtained reasonably accurate equations.
The DTV is an economical, easy-to-operate and easy-to-maintain vaporizer. Our goal is to develop the optimum DTV by improving methods of analysis.
Keywords
Heat Transfer Coefficient Thermal Performance Outer Tube Coefficient Heat Transfer Annular ChannelPreview
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