Performance prediction of multilayer insulation

Bapat, S.L.; Narayankhedkar, K.G.; Lukose, T.P.

doi:10.1016/0011-2275(90)90234-4

Cited by 48 publications

(23 citation statements)

References 8 publications

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“…[10][11][12][13][14][15][16][17][18][19][20]. The same characteristics that allow TF insulation to perform in those industries can also be applied to the petroleum industry.…”

Section: Thin-film Insulationmentioning

confidence: 98%

Flow Assurance Begins with Downhole Insulation

Lively¹

2002

All Days

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Thin-Film (TF) insulation combined with an insulating packer fluid is an effective and proven method for insulating downhole production tubing and casing in order to preserve reservoir heat and to enhance startup conditions. Modeling indicates that this system can increase FWHT by as much as 25°F-30°F as flow rates decline.Combining these technologies enables heat losses at couplings, valves, gauges and other components without insulation to be controlled. An aqueous based packer fluid inhibits the formation of convection currents that commonly occur in standard brine completion fluids, resulting in an overall heat transfer coefficient that is more than 10 times lower than standard completion fluids. These technologies are cost effective, readily available and provide numerous advantages over traditional completion systems.Until the last few years the only option for downhole insulation has been vacuum insulated tubing (VIT); however many applications cannot support the economics of VIT nor do they require the low thermal conductivity that VIT provides.Any one of these technologies can be used alone or in combination with another depending on the application. In some applications all three may be required to accomplish the objective.

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“…[10][11][12][13][14][15][16][17][18][19][20]. The same characteristics that allow TF insulation to perform in those industries can also be applied to the petroleum industry.…”

Section: Thin-film Insulationmentioning

confidence: 98%

Flow Assurance Begins with Downhole Insulation

Lively¹

2002

All Days

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“…solid conduction and radiation [56], where radiation becomes dominant at temperatures above ±600K [57] or at vacuum levels below 13 mPa (10 À4 torr) [58]. Moreover, if the MLI operates at vacuum levels below 13 mPa, heat transfer by residual gas conduction is also minimized [30,59]. Besides the materials (for the spacer and screen) and the vacuum level, the heat flux through an MLI depends strongly on the layer density of the insulation system.…”

Section: Insulation Materialsmentioning

confidence: 99%

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Sharifzadeh

Verstraete

Hendrick

2015

International Journal of Hydrogen Energy

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“…This is roughly a factor of two lower than the quoted optimal packaging density for MLI. 18,19 However, lower packaging densities enable successful evacuation of the vacuum vessel.…”

Section: Radiation Shields Heat Exchangers and Multi-layer Insulationmentioning

confidence: 99%

Thermal architecture for the SPIDER flight cryostat

et al. 2010

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We describe the cryogenic system for spider, a balloon-borne microwave polarimeter that will map 8% of the sky with degree-scale angular resolution. The system consists of a 1284 L liquid helium cryostat and a 16 L capillary-filled superfluid helium tank, which provide base operating temperatures of 4 K and 1.5 K, respectively. Closed-cycle 3 He adsorption refrigerators supply sub-Kelvin cooling power to multiple focal planes, which are housed in monochromatic telescope inserts. The main helium tank is suspended inside the vacuum vessel with thermally insulating fiberglass flexures, and shielded from thermal radiation by a combination of two vapor cooled shields and multi-layer insulation. This system allows for an extremely low instrumental background and a hold time in excess of 25 days. The total mass of the cryogenic system, including cryogens, is approximately 1000 kg. This enables conventional long duration balloon flights. We will discuss the design, thermal analysis, and qualification of the cryogenic system.

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Performance prediction of multilayer insulation

Cited by 48 publications

References 8 publications

Flow Assurance Begins with Downhole Insulation

Flow Assurance Begins with Downhole Insulation

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Thermal architecture for the SPIDER flight cryostat

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