GEOLINKS International Conference 2019, Book 3
ECOLOGY AND ENVIRONMENTAL STUDIES
COSTS OF ENERGY LOST DURING THE LNG REGASIFICATION AT ŚWINOUJŚCIE TERMINAL
Dr. Ewelina Zloczowska
Nowadays, LNG plays an increasingly important role in the world’s energy balance. The traditional natural gas supply model requires transportation via a gas network from the extraction site to the final recipient. This solution is limited by too long distance or large water reservoirs (e.g. an ocean) in between the manufacturer and the recipient. Given that the largest natural gas deposits are in: Indonesia, Malaysia, Algeria, Qatar, Trinidad and Tobago, Nigeria, Australia, Brunei, Oman and UAE, there is a need for its transportation over long distances. In such cases, the effective transport of natural gas is made possible via its liquifying, accomplished by lowering the temperature to about-161°C. However, it requires LNG export and import terminals to be built. The processes of condensing and regasification of gas are quite energetically and environmentally costly links of LNG supply chain. There are possibilities to minimize them, treating LNG not only as a fuel but also as a source of low-temperature heat. During the LNG regasification, the cold "stored" within is usually released into the environment, which causes a significant loss. The ever-increasing energy prices and environmental consciousness have resulted in the development and implementation of technical solutions effectively utilizing cold waste from the LNG regasification process in a variety of industries. This article presents a possible potential for usage of cold waste from LNG regasification process in the Świnoujście terminal and benefits associated. For this purpose, a characteristic of the currently used regasification system based on the SCV exchangers was performed, then its energetic analysis followed. A concept of regasification system, in which cold waste is used to supply a cold store, will also be presented. Not only energy aspects resulting from cold recovery from the process were accounted in the following analysis, but also a reduction of the environmental impact of the system in question. Basing on carried out research, the cost of energy lost in the LNG regasification process in the Świnoujście terminal was indicated.
LNG, waste cold, efficiency, regasification