Morphology development of high-density rigid polyurethane foam upon compression by on-line scanning electronic microscope

2007 ◽  
Vol 105 (4) ◽  
pp. 2008-2011 ◽  
Author(s):  
Lei Shi ◽  
Zhong-Ming Li
Keyword(s):  
Polyurethane Foam ◽  
High Density ◽  
Rigid Polyurethane Foam ◽  
On Line ◽  
Line Scanning ◽  
Morphology Development ◽  
Electronic Microscope

scholarly journals Calculation of Boil-Off Gas (BOG) Generation of KC-1 Membrane LNG Tank with High Density Rigid Polyurethane Foam by Numerical Analysis

2017 ◽  
Vol 24 (1) ◽  
pp. 100-114 ◽  
Author(s):  
Hyeonwon Jeong ◽  
W. Jaewoo Shim
Keyword(s):  
Thermal Conductivity ◽  
Polyurethane Foam ◽  
The United States ◽  
Coast Guard ◽  
High Density ◽  
Heat Transfer Analysis ◽  
Internal Boundary ◽  
Rigid Polyurethane Foam ◽  
Equivalent Thermal Conductivity ◽  
Lng Tank

Abstract Recently, a new type of LNG tank named “KC-1 membrane LNG tank” has been developed by Korean Gas Corporation (KOGAS), and Samsung Heavy Industries (SHI) is currently building KC-1 membrane type LNG carriers. Unlike other LNG tanks, the KC-1 membrane LNG tank has a single-insulation structure rather than a double-insulation structure. For a given tank’s boundary condition, heat transfer analysis is performed from the external to the internal environment of the LNG tank by numerical simulation for three tanks. In each tank, the main thermally resistant layer of insulation is assembled with a High density rigid Polyurethane Foam (H-PUF), which is blown with one of three different types of hydrofluorocarbons-namely-HFC-365mfc, 245fa, and 245fa-e (enhanced). Advantage of such blowing agents is that it has a lower Ozone Depletion Potential (ODP) than HCFC-141b or carbon dioxide (CO2) that has been used in the past as well as having low thermal conductivity. A Reduced Order Model is utilized to a 3-dimensional section of the insulation to calculate equivalent thermal conductivity. The equivalent thermal conductivity of the insulation is then applied to the rest of LNG tank, reducing the size of tank simulation domain as well as computation time. Tank’s two external and internal boundary conditions used are those defined by the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC) and the United States Coast Guard (USCG) conditions. Boil-off Rate (BOR) of the tank that has the insulation with H-PUF blown with HFC-245fa resulted in 0.0927 %/day and 0.0745 %/day for IGC and USCG conditions, respectively.

Experimental study of horizontal flame spread over rigid polyurethane foam on a plateau: effects of sample width and ambient pressure

2014 ◽  
Vol 39 (2) ◽  
pp. 127-138 ◽  
Author(s):  
Y. Zhou ◽  
H. H. Xiao ◽  
J. H. Sun ◽  
X. N. Zhang ◽  
W. G. Yan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Polyurethane Foam ◽  
Flame Spread ◽  
Ambient Pressure ◽  
Rigid Polyurethane Foam ◽  
Sample Width
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