결빙 방지를 위한 저전력 갑판이동로 개발

Development of a Low-power Walk-way for Anti-Icing

Abstract

The walk-way means a passage installed on the deck of a ship so that a person can safely move under any circumstances. So, the walk-way has to maintain a temperature of $5^{\circ}C$ or more for anti/de-icing even at an ambient temperature of $-62^{\circ}C$, a temperature in polar region. At present, the walk-way with heating cable is used, but the anti/de-icing effect is insufficient due to low heat transfer efficiency. Also, it has a construction problem due to heavy weight. In this study, an walk-way with a CNT surface heating element is proposed for the high anti/de-icing effect and the heating value per unit volume. The international standard survey, conceptual design, and simulation for the structural safety and the heat transfer are performed for the development of the proposed walk-way. To enhance the performance, the case studies based on the simulation analysis are conducted. Finally, the final prototype, applying the optimum material and thickness (3.2t of SS400) based on the case study results, is fabricated and experimented.

Fig. 1 Deck walk-way with heating cable

Fig. 2 Deck walk-way map

Fig. 3 Design drawing of the initial deck walkway

Fig. 4 Prototypes production

Fig. 5 Analytical model of ABAQUS

Fig. 6 Prototypes production condition of heat transfer analysis

Fig. 7 Calculation of air temperature inside top

Fig. 9 Result for analysis of heat transfer (case 2)

Fig. 10 Result for analysis of structure (case 12)

Fig. 11 Design improvement plan

Fig. 12 Fainal Prototyping

Fig. 13 Scene of installation

Fig.14 Test procedure on temperature

Fig. 8 Condition of structural analysis

Table 1. Criteria by grade of Winterization

Table 2. Comparison of Characteristics of Heating Cable and Surface Heating Elements

Table 3. Thermal properties

Table 4. Mechanical properties

Table 5. Result of case study

Table 6. Inproved fainal prototypes

Table 7. Condition of repeated load test in cryogenic environment