Abstract
LPG / C Griya Borneo is a gas vessel with a semi-pressurized type, where the supporting components in the form of cargo handling equipment have a very big influence on the success and safety of ship operations. This is important to note because when the ship will carry out the loading process, the load temperature must be in accordance with the boiling point. High temperatures on ammonia loads can increase the pressure in the tank so that it exceeds the specified pressure limits and ammonia loads that have high temperatures need to be reliquefaction. In addition, the compressor compressor suction pressure that does not work in accordance with what is expected to affect the reliability process. This resulted in the reliquefaction process being longer than usual. The long reliquefaction process results in more fuel being used so that it costs a lot. Therefore the writer makes a thesis related to the problems experienced by the ship owned by PT Humpuss Transportasi Kimia aims to find out how much influence the compressor compressor suction pressure and tank pressure on the process of reliquefaction on the LPG / C Griya Borneo ship, the place where the authors practice.
Highlights
Gas transport vessels (Ammonia) have tanks made of stainless steel that can carry liquefied gas loads
The following is a recapitulation of compressor compressor suction pressure (X1), tank pressure (X2) and the length of the reliquefaction (Y) process from August 2018 to August 2019, including: Table 4 Compressor Cargo Suction Pressure (X1), Tank Pressure (X2) and Reliquefaction Duration (Y)
In tcount = 15.82 (15.82> 1.69092) and fcount = 122.2 (122.2> 4.13), where if tcount> ttable and fcount> ftabel there is a significant relationship between variables X1 and Y.rx1y = 0,94 To speed up the reliquefaction process to 90%, it can be done by keeping the compressors' cargo suction pressure stable
Summary
Gas transport vessels (Ammonia) have tanks made of stainless steel that can carry liquefied gas loads. The charge cooling system functions to change the charge in a vapor-shaped tank back into a liquid form. This system works to suck the steam from the tank pressed until the pressure and temperature increase. The compressed vapor will be condensed which results in the form of liquid or called condensate which will be flowed back into the tank with a condensate return system so that it can reduce the temperature and pressure of the charge in the tank. The stability of temperature and pressure in the tank must be maintained
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