Pressurizing empty tank with

FilUng an empty tank with thermally subcooled liquid will also lead to autostratification. Some of the subcooled liquid will absorb heat from the tank walls, piping, etc. to produce significant quantities of saturated Uquid at the tank operating pressure, which partially evaporates as cooldown vapour. This saturated Uquid will form a warmer, less dense stratified layer on top of the thermally subcooled liquid. 

Gas pressurized Monitor tank level and provide interlock for feed feed shut-off overpressurizes, alternate fluid delivery system (e.g., pump) centrifuge system when feed vessel delivery gas pressure to maximum safe empties working pressure of downstream system (e.g., pressure regulation) Restrict feed flow rate to be consistent with vent capacity Ensure adequate vent capacity for maximum possible gas flow ... 

An empty steel gas tank with valve weighed 125 lb. Its capacity is 1.5 ft. When the tank was filled with oxygen to 2000 Ibf/in absolute at 25 °C, (a) what percent of the total weight of the full tank was O2 Assume the validity of the ideal gas law. (One atmosphere of pressure equals 14.7 Ibf/in. )... 

Spillages from the tanker and leaks from pipes and valves may be collected in a small tank (with suitable lining) kept at ground level. It can be emptied out by a small submerged pump in the tank. It is not advisable to use compressed air to empty out the tank because it might have got corroded in humid weather and can burst due to the applied air pressure. 

In Example Problem 5.1, we considered a CH4 storage tank with a volume of 49.0 L. en empty, the tank has a mass of 55.85 kg, and when filled, its mass is 62.07 kg. Calculate the pressure of CH4 in the tank at an ambient temperature of... 

When the fire died down, the response team attempted to patch the hole with a Proctor patch and to empty the car of its chlorine contents. When pressure was applied, the patch did not hold. The tank car was finally repaired three and a half days after the accident. Technical personnel from Canadian Industries Limited vacuumed out the chlorine as opposed to pressurizing the tank car. The liquid was removed to a tank truck and then to a tank car and the chlorine vapor was neutralized with caustic soda. 

SDS2 utilizes liquid poison (absorber) injection into the moderator. Upon receipt of a reactor trip signal, fast-acting valves between a high-pressure helium tank and the poison tanks open to pressurize and inject the liquid poison into the moderator. Injection occurs from several perforated horizontal tubes in the calandria, through which gadolinium nitrate solution jets into the moderator. An earlier design, the 220-MWe Indian HWRs, employs a set of vertical empty tubes in the reactor core that can be filled with a liquid poison (lithium pentaborate solution). 

In filter tanks, a pipe (at least DN15) with a test valve must be placed beneath the exhausters leading to the floor level through which water must be taken to the open air every day until the water is free from gas bubbles (see Fig. 20-4b). The partly filled cathodically protected pressure booster tank cannot be provided with automatic gas exhausters. Therefore, nozzles (at least DN15) with manually operated valves must be provided at the highest point of the tank. Before emptying, the protection system must be switched off and the tank filled with water through the manual valve. 

The function of the control system is to regulate the operation of the pump. The latter pumps fluid from an infinitely large reservoir into the tank. We shall assume that it takes 60 s to pressurize the tank. The pressure switch has contacts, which are closed when the tank is empty. When the threshold pressure has been reached, the pressure switch contacts open, de-energizing the coil of relay K2 so that relay K2 contacts open, ranoving power from the pump, causing the pump motor to cease operation. The tank is fitted with an outlet valve that drains the entire tank in an essentially negligible time the outlet valve, however, is not a pressure relief valve. When the tank is empty, the pressure switch contacts close, and the cycle is repeated. 

For tanks with small internal pressures, the maximum pressure is limited to that which does not cause the uplift of the tank in the empty condition. Hence firom Fig. 13.3 the upward force due to pressure is equal to the downward force resulting from weight of shell plus roof ... 

The tank was used for storing a liquid product that melts at 97°C. It was therefore heated by a steam coil using steam at a gauge pressure of 100 psi (7 bar). At the time of the incident, the tank was almost empty and was being prepared to receive some product. The inlet line was being blown with compressed air to prove that it was clear—the normal procedure before filling the... 

Troyan13 tells how to spot certain symptoms during the startup phase so that problems may be averted. Some examples follow. Noisy equipment or a higher-than-normal temperature may mean poor lubrication. This could be due to plugging because of dirt that accumulated during construction. Vibration may mean that the equipment should be anchored better. Excessive pressures or unexpected vacuums may be due to spray painting that clogged ventilators. In one case, a tank was filled with water and then spray-painted. When the tank was emptied, a vacuum was formed that collapsed it. 

The Peugeot Quark ATV uses an air-cooled fuel cell with a 40 cell nickel metal hydride battery. The 9 liter hydrogen tank can be pressurized to 10,150 psi for a range of up to 80 miles. The tank is designed to be exchanged for a full one when empty. Each 17 inch wheel has its own electric motor that can produce 74 pound-feet of torque. The motors also supply regenerative braking. 

The defuzed projs are placed vertically with open ends downward inside a long rectangular tank provided with a perforated false bottom. The ogival part of each proj should rest in one of the holes of false bottom. Then the tank is partly filled with water and live, low pressure steam is injected thru a perforated pipe located below the projs. This causes the water to boil and the heat melts the expl, thus emptying the projs. The molten material is accumulated at the bottom of the tank and then drained. The expl thus collected Is usually suitable for industrial uses... 

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