Filling coefficient refers to the weight of liquefied gas filled per liter of cylinder volume, which is calculated according to the following formula.
Let f be the filling coefficient, w be the filling weight of liquefied gas, v be the volume of gas cylinder, and f = w/v.
Extended data:
I. Advantages and disadvantages of heptafluoropropane:
1, there is a pipe network system to spray through the pipe network, and the nozzles are evenly distributed, so the spraying is even and the fire extinguishing effect is good, but there is no pipe network, and it is usually sprayed directly by box nozzles, which is not uniform enough;
2. If there is a pipe network, it is necessary to set up a separate gas cylinder room and pipe network, but there is no pipe network. If only one area is protected, the cost of pipe network system is very high from the economic point of view.
2. Low-pressure liquefied gas: Because the critical temperature (tc) of low-pressure liquefied gas is higher than the maximum working temperature of the gas cylinder (t=60℃), the low-pressure liquefied gas cylinder will not undergo phase change during filling, storage, transportation and use.
3. High-pressure liquefied gas: Because the critical temperature (tc) of most high-pressure liquefied gases is lower than the highest working temperature of gas cylinders (t=60℃), high-pressure liquefied gases are liquid when filling, and the pressure in the cylinders at this time is the saturated vapor pressure at the liquid interface, which is no different from low-pressure liquefied gases.
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