Basic Design of LNG Receiving Terminals
Tokyo Gas itself performed the basic design and construction work for its four main LNG receiving terminals (in Negishi, Sodegaura, Ohgishima and, most recently, Hitachi), as well as LNG satellite plants such as the Hitachi and Onahama Satellite Stations. This basic design takes full advantage of our years of experience operating and maintaining such terminals, and makes use of wide-ranging know-how to keep down construction and running costs while ensuring reliability, operability, maintainability, and safety.
1.Selection of locationLNG receiving terminals are sited taking into account numerous factors. These include:
- Ease of use of LNG (e.g., accessibility to the gas demand area by pipelines)
- Access to port that LNG ships can safely and reliably enter to unload
- Ease and stability of access to electricity, seawater, and other utility services
- Impact on local environment, safety, disaster prevention, etc.
- Cost performance
2.Determination of gas production and storage capacityA terminal’s gas production capacity needs to be known in order to decide the capacity and number of LNG facilities to install, and is determined based on peak gas demand per hour, facility reserve margins, and so on. It is also important to forecast production capacity in the future.
LNG storage capacity is important to know as it has a major impact on terminal layout and investment plans. It is determined based on factors including the capacity required to absorb seasonal variations and cope with emergencies.
3.Receiving terminal processesLNG receiving terminals consist of many facilities, including unloading facilities, LNG tanks, LNG pumps, BOG compressors, vaporizers, odorizing facilities. The optimal sequence of processes is mapped out by conducting case studies to confirm reliability, ease of use, maintainability, and many other things.
〔Example of sequence of processes at an LNG receiving terminal〕