Spread over an area of 46.7 hectares, the terminal has a jetty where LNG cargo is unloaded through to the cryogenic tanks. LNG is stored in the tanks at -160 C and pumped out of the tank for sending out to customers after regasification.
The Main components of the terminal are LNG jetty with cryogenic unloading arms, cryogenic tanks to store LNG at -160C, LNG pumps to boost pressure to 80-100 barg, LNG vaporisers and send-out pipeline. The send-out pipeline carries the gas to the delivery point which is located at a distance of 12.5 kms from the terminal.
The LNG jetty has 3 unloading arms, 2 for liquid and 1 for vapour. Unloading of LNG can be done at a maximum rate of 11000 M3/Hour. The jetty has state of art Emergency Shutdown System and safety equipments to avoid & control spills and leaks of LNG. The LNG unloaded is carried in cold condition by anunloading line to the LNG tanks.
The terminal has two LNG tanks with a capacity of 160000 M3 each. These tanks have pre-stressed concrete outer and 9% Nickel steel inner tank to hold the LNG at -160 °C. LNG is stored in the tanks at atmospheric pressure. Cold insulation is provided between the outer and inner tanks to minimise heat ingress to the tank. This would ensure that LNG can be stored in the tanks at low temperature with minimum vaporisation of LNG. The tanks are provided with protection against high pressure to avoid any damage and with robust controls to keep the pressure within limits.
LNG cryogenic pumps are installed inside the tanks, which pump out LNG from the tanks at intermediate pressure. The LNG pressure is finally boosted to 110 barg with the help of multi stage cryogenic pumps before being sent to the regasification section.
LNG is re-gasified in Open Rack Vaporisers, using sea water as the heating medium. These vaporisers are designed to handle LNG at -160 °C and have been provided with instrumented protections to avoid any damage.
The terminal also has a Submerged Combustion Vaporiser which uses fuel gas as the source of heat. In these vaporisers, heat generated by burning fuel gas is used to warm the water which in turn vaporizes LNG.
The terminal requires around 11MW power, which is supplied by the state electricity grid and captive power generators.The generators use fuel gas from vaporizers to generate power. A fuel gas system has been installed which supplies gas to the generators at required pressure and flow. In case of failure of power, Emergency Diesel Generator is used. This emergency supply ensures all emergency equipments get power and keep the facility in safe condition.