LNG冷熱利用熱交換器の実験的検討(熱工学,内燃機関,動力など)

概要

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To make full use of cold heat of LNG, a heat exchanger that exchange heat between air and combustible LNG was experimentally studied. It is called Double Tube type because channels of each fluid are separated by a double tube to improve the safety. Heat transfer characteristics of the heat exchanger were measured, using a test section of 1 m long and 110 mm in diameter. The sum of thermal contact resistance between the outer tube and the plate fin and between the outer tube and the inner tube was 3.9 m^2K/кW when air was cooled down to 230 K. The sum is the upper limit value or safety-side value because the other degradation factors such as flow maldistribution or bypass flow between the baffle plate and the shell were not considered. The calculated shell-side pressure loss was in good agreement with the experiment when pressure loss around the window of a baffle plate was estimated by using semi-empirical formula for 90° elbow pipe.
社団法人日本機械学会の論文
2003-06-25