because horizontal vessels can't kept a high presssure
A rupture disc on a recovery vessel for low pressure refrigerants typically relieves at a pressure range of around 15 to 25 psi, depending on the specific design and safety requirements of the vessel. This low pressure setting is essential to ensure safe operation and prevent overpressure conditions that could lead to vessel failure. Always refer to the manufacturer's specifications for the exact relief pressure for a particular vessel.
At low temperature and high pressure, the VOLUME of the gas will be reduced.
I think a vessel is containing a fluid under high pressure whereas a drum contain a fluid with no or low pressure.
Horizontal winds are primarily caused by differences in air pressure between high and low pressure systems. Air moves from areas of high pressure to areas of low pressure, creating wind. Other factors such as the rotation of the Earth (Coriolis effect), friction with the Earth's surface, and temperature gradients also influence the direction and speed of horizontal winds.
Pulmonary arterial system has high pressure but low oxygen concentration.
So that it does not collide with the walls
A high pressure system has a weaker horizontal pressure gradient than a low pressure system, which means the atmospheric pressure varies widely in a low pressure system and doesn't vary much in a high pressure system. The wind speed depends on the strength of the horizontal pressure gradient.On a meteorological map, the horizontal pressure gradient is marked with isobars, which are lines with match the points with the same atmospheric pressure. A high pressure system is characterized by widely spaced isobars while low pressure systems are noted by tightened close isobars.A high pressure system may have an air pressure of 1028 hPa in his core and 1013 hPa in its periphery: the air pressure varies about 16 hPa. A low pressure system may have an air pressure of 987 hPa in its core and 1013 in its periphery : the air pressure varies about 26 hPa. So, the winds will be very light and even non-existent in a high pressure system while the winds will be very strong and even turbulent in a low pressure system.
The pressure gradient force is responsible for initiating horizontal air movement from high pressure to low pressure areas. This force is a result of pressure differences between two adjacent regions, leading to the flow of air in an attempt to equalize the pressure.
Add refrigerant vapor on the low side of the system ,the compressor raises the pressure of the refrigerant on the high side of the system and lowers the pressure on the low side
Add refrigerant vapor on the low side of the system ,the compressor raises the pressure of the refrigerant on the high side of the system and lowers the pressure on the low side
Wind occurs because air tends to move from region of higher to lower pressure.
There is nothing that is specifically designed to keep the air pressure low under a train. A train is kept on the tracks by gravity, nothing more.