November 2022
Now it's really full speed ... last week we commissioned the new LBG backup for Örebro municipality and already this week we are commissioning a new LBG filling station for Svensk Biogas in Norrköping Ingelsta. This will be the third filling station for liquid biogas that we build for Svensk Biogas after the stations in Mjölby and Mörtlösa and is located at Alfredsson Transport AB, which has long been at the forefront of climate-friendly transport. With the new filling station on the doorstep, Alfredssons can now refuel their fossil-free LBG trucks at home as well.
Liquid biogas is stored at -160 degrees in a cryogenic vacuum-insulated tank that resembles a giant thermos. It keeps the heat out brilliantly, but sooner or later some of the gas will still heat up and turn from liquid to gas ('boil-off') where the gas expands by a factor of 600. This will gradually increase the pressure in the cryogenic tank and, to avoid activating the safety valve, we can either cool down the biogas with liquid nitrogen (-190 degrees) or use the decoction.
"When there is a need for compressed vehicle gas, we like to use the decoction to offer CBG refueling to avoid using nitrogen for cooling. However, when there was no CBG need, we worked with the customer to develop a climate-smart solution where we use the decoction to heat their properties and can thus greatly reduce nitrogen use as well as heating costs." says Torbjörn Karlsson, Technical Manager at Processkontroll Green Technology .