Abstract:
A cryogenic liquid storage tank includes a base plate and side wall extending upwardly. The base plate and side wall include an outer leaf enveloping an inner leaf The outer leaf part of the base plate includes a lower, outer leaf concrete bottom plate on a substrate. The bottom plate is continuous with an outer leaf reinforced concrete layer of the outer side wall. An inward surface of the bottom plate and concrete layer of the outer leaf are lined with a continuous outer leaf metallic membrane. A bottom insulation layer is arranged above the outer leaf metallic membrane on the bottom plate. The inner leaf includes an inner leaf concrete bottom layer on the bottom insulation portion. The inner leaf metal membrane is lined with an inner leaf inner concrete layer. The outer leaf hoop stress reinforced outer concrete wall supporting an insulated dome structure.
Abstract:
A catalytic tank heater includes a catalytic heating element supported on an LPG tank by a support structure that holds the element in a position facing the tank. Vapor from the tank is provided as fuel to the heating element, and is regulated to increase heat output as tank pressure drops. The heating element is internally separated into a pilot heater and a main heater, with respective separate fuel inlets. The pilot heater remains in continual operation, but the main heater is operated only while tank pressure is below a threshold. Operation of the pilot heater keeps a portion of the catalyst hot, so that, when tank pressure drops below the threshold, and fuel is supplied to the main heater, catalytic combustion quickly expands from the area surrounding the pilot heater to the remainder of the catalyst.
Abstract:
A boss for a pressure vessel has a flange. The flange includes an interior keyway having an inner sidewall and a plurality of bores disposed on the inner sidewall. A pressure vessel includes a main body section and an end section. The end section includes a boss and the boss includes a flange. The flange includes an interior keyway having an inner sidewall and a plurality of bores disposed on the inner sidewall. In another aspect, a pressure vessel includes an outer shell, and inner liner and a boss including a flange with an exterior side and an interior side. The liner is mechanically integrated with the flange via a plurality of anchors, each anchor contacting the flange only on the interior side. A method of forming a pressure vessel includes providing a boss having a flange. The flange has an interior keyway having an inner sidewall and a plurality of bores disposed on the inner sidewall. The method comprises allowing a fluid polymer material to flow into the interior keyway and into the plurality of bores.
Abstract:
A high pressure tank that has particular application for storing hydrogen gas on a vehicle for a fuel cell system. The tank includes a gas tight inner liner layer and a fiber bundle outer composite structural layer. A first strain gauge is provided in the outer layer and a second strain gauge is provided in the inner liner layer both proximate a transition between the layers. The strain gauges are calibrated relative to each other to identify the pressure where the inner liner layer begins to shrink and separate from the outer composite layer.
Abstract:
The invention relates to an arrangement of pulse-modulated quick-acting valves on a fluid storage device, wherein the valves have different nominal widths for operation thereof in different pressure ranges with otherwise identical structure. The number of the valves and the respective nominal widths thereof is selected and matched to a fluctuation range of the pressure in the storage device such that over this fluctuation range of the storage device pressure, by complete opening, complete closing and/or switching individual valves or valve combinations, a total dispensed mass flow of the fluid from the storage device in a fluctuation range of varying mass flows of constant pressure as required can be produced.
Abstract:
A compressed gas cartridge is pierced and dispenses its pressurized gas through a permeation element that serves as a way to regulate the rate of gas dispensed out an outlet in the surrounding housing. It has been found that the use of a permeation element can control the rate of dispensation to an almost constant rate over time, which is valuable in applications such as art preservation for just one example.
Abstract:
A sealing system for an outlet of a plastic-lined cylinder has a plastic liner outlet extending into a bore of a boss. An insert is engageable with the bore, forming a primary seal between the insert and portion of the liner outlet. A tapered compression surface of the insert engages a tapered bore portion of the liner outlet adjacent the primary seal forming a tapered interface and a secondary seal. An axial position in the boss, and dimensional integrity, of the liner outlet is maintained by engaging an annular distal end of the liner outlet in the bore by a stop. The stop can be formed on the insert.
Abstract:
A boss and a capture sleeve for use with a pressure vessel are disclosed. The capture sleeve is disposed within a liner of the pressure vessel, adjacent an opening. A plurality of attachment members disposed on the capture sleeve are received by the boss, securing the boss to the liner. The pressure vessel including the boss and the capture sleeve minimizes the effects of pressure and temperature variations, militates against an axial and rotational movement of the boss, and facilitates installation and replacement of a seal disposed adjacent the boss.
Abstract:
A pressure vessel for storing a fluid is disclosed. The pressure vessel includes a vessel liner forming a hollow tube and including a plurality of layers with an aperture formed therein, wherein at least one of the layers is a barrier layer and an end cap coupled to the vessel liner, wherein the end cap has a plurality of layers, and wherein at least one of the layers of the end cap is a barrier layer.
Abstract:
A pressure vessel may be formed from a thermally processed metal tube. The thermally processed metal tube may be seamless with a large length to diameter ratio. End portions of the thermally processed metal tube may be formed at a first temperature below the lower critical temperature by a load less than about the ultimate stress of the metal. After forming, the end portion may be thermally reconditioned at a second temperature below the lower critical temperature to relieve stress and approach similar material properties as the thermally processed metal tube.