In a tubular body mounting step, a tubular body is connected to a first end constituting member and a second end constituting member of a fuel cell stack, respectively. At this time, a first opening and a second opening formed at both ends of the tubular body are closed by the first end constituting member and the second end constituting member, respectively. Accordingly, the fuel cell stack is surrounded by the tubular body. A gap is formed between the outer wall of unit cells of the fuel cell stack and the inner wall of the tubular body. In a determination step, a test gas is supplied into the fuel cell stack. Further, whether the test gas exists in the gap is determined.

A high-temperature and high-pressure equipment and method for microscopic visual sulfur deposit seepage test is provided by the present disclosure, the equipment comprises an injection system, a high-temperature and high-pressure visual kettle, a pressure supply system, a data acquisition and analysis system, a fluid recovery system, and an injection branch pipe; the injection system comprises an ISCo micro-injection pump, an intermediate container, a thermostatic heating oven and a pressure meter; the intermediate container is arranged in the thermostatic heating oven, the ISCo micro-injection pump is connected to the intermediate container; the data acquisition and analysis system comprises a microscope, a high-brightness light source and a computer; the pressure supply system comprises an annular pressure tracking pump, a back pressure pump, a back pressure valve and a pressure gauge; the fluid recovery system comprises a wide neck flask with rubber stopper, a balance, a flowmeter and an exhaust gas absorber tank.

A battery pack is capable of sensing the generation of a gas using Mie scattering, whereby it is possible to rapidly detect abnormality of the battery pack. In addition, whether a battery is abnormal is determined in consideration of a gas generation time as well as the generation of the gas, whereby it is possible to rapidly detect whether the battery is abnormal.

A method for recognizing the presence of leakages from sealed containers includes defining a detection zone in which a sealed container will be placed, putting the detection zone in communication with at least one gas sensor through at least one duct, introducing a flushing gas into the detection zone through the duct, placing a container in the detection zone; and sucking a gas flow from the detection zone through the duct and transferring it to a first sensor. The gas flow that reaches the first sensor is either transferred to a second sensor or to the first sensor for a second time. The signals generated by the two sensors, or the two signals generated by the same sensor, are processed for determining the presence of a gas leakage in the container.

A method of fabricating a conduit comprises steps of attaching a first tubular-outboard-ply-end of a tubular outboard ply to a first inner collar portion of a first collar with a second weld and attaching a second tubular-outboard-ply end of the tubular outboard ply to a second inner collar portion of a second collar with a fourth weld. The method also comprises steps of inserting a tubular inboard ply into the tubular outboard ply, threadably interconnecting the first inner collar portion and a first outer collar portion of the first collar, and threadably interconnecting the second inner collar portion and a second outer collar portion of the second collar. The method further comprises steps of attaching a corrugated inboard ply to the first outer collar portion with a first weld and attaching a corrugated inboard ply to the second outer collar portion with a third weld.

In a tubular body mounting step, a tubular body is connected to a first end constituting member and a second end constituting member of a fuel cell stack, respectively. At this time, a first opening and a second opening formed at both ends of the tubular body are closed by the first end constituting member and the second end constituting member, respectively. Accordingly, the fuel cell stack is surrounded by the tubular body. A gap is formed between the outer wall of unit cells of the fuel cell stack and the inner wall of the tubular body. In a determination step, a test gas is supplied into the fuel cell stack. Further, whether the test gas exists in the gap is determined.

An information handling system includes a liquid cooling system and a coolant leak detector. The liquid cooling system circulates chilled coolant liquid to a component of the information handling system. The coolant liquid includes a fluorescent dye that emits light at a particular wavelength when the fluorescent dye is illuminated. The coolant leak detector system includes a light source, and a detector configured to detect light at the first wavelength. When the liquid cooling system develops a leak, the light source illuminates the first fluorescent dye in the leaked coolant liquid, the detector detects the light at the first wavelength, and the coolant leak detector provides an indication that the liquid cooling system has developed a leak in response to detecting the light at the first wavelength.

A leakage mitigation system includes a leakage detection device having a canister configured to: (i) contain a first reactant and a second reactant and, (ii) based on a volume of liquid leaked from a tank, allow the first reactant and the second reactant to react with each other to produce a gas. A shut-off valve coupled to an inlet pipe of the tank is configured to actuate between an open condition and a closed condition. Further, a conduit extending between the leakage detection device and the shut-off valve allows flow of the gas from the leak detection device to the shut off valve. In order to mitigate the leakage of water, the shut-off valve is actuated between the open condition and the closed condition based on the pressure exerted thereon by the flow of the gas.

According to the method, either CO2-free air or pure nitrogen N2 is pumped into the cooling circuit selectively depending on system parameters. To this end, the method ensures that the air injection rate is high enough that, under normal conditions, the hydrogen concentration in the tank and in the riser remains below 2% H2. On air injection, the oxygen O2 (>2 ppm) in the cooling water reacts with the copper in the cooling ducts and a layer of copper oxide forms on the inner walls of said ducts. No reaction is triggered by the injection of nitrogen N2. The CO2 content in the injection air and, at the same time, also the H2 content in the exhaust air are continuously measured and monitored, and an alarm is triggered if adjustable limit values are exceeded. The equipment for performing the method comprises an electronic control unit (65) with an input field and display as a control box, and a pump and a pipe circuit for drawing air in from the riser. The control unit (65) can evaluate all the measured data from the sensors and analysers connected to the pipe and can at least check the CO2 content in the supply air and the H2 content in the riser (13) and display the hydrogen leakage.

Methods for testing the integrity of a containment sump in contact with a matrix with a testing apparatus are provided. The testing apparatus may include an underground fixture positioned in contact the matrix, a test chamber, a conduit structure providing fluid communication between the underground fixture and the test chamber, and a pressure source for exerting a pressure that is communicated to the underground fixture via the conduit structure. In some embodiments, a method may include: releasing a test media into the containment sump; generating a negative pressure within the testing apparatus for a time period; and testing for the presence of test media within the testing apparatus. In other embodiments, a method may include: releasing a test media into the testing apparatus; generating a positive pressure within the testing apparatus for a time period; and testing for the presence of test media within the containment sump.