A steady state analysis method was developed for gas networks with distributed injection of alternative gas. A low pressure gas network was used to validate the method. Case studies were carried out with centralized and decentralized injection of hydrogen and upgraded biogas. Results show the impact of utilizing a diversity of gas supply sources on pressure distribution and gas quality in the n...

The paper describes a new method for numerical monitoring of discrepancies in natural gas supply to consumers, who receive gas from gas distribution loops. This method serves to resolve the vital problem of commercial natural gas accounting under the conditions of deficient field measurements of gas supply volumes. Numerical monitoring makes it possible to obtain computational estimates of actu...

In the context of climate change, natural gas is becoming increasingly important for low-carbon development in China. The gap between the demand and supply of natural gas, domestically, and China’s high dependence on foreign sources, highlights the importance of ensuring a secure system for supplying natural gas in the country. This study applied ecological network analysis, a powerful systems-...

Gas purity is a key factor in optimizr ing excirner and carbon dioxide laser performance. Gas impurities in these laser systems degrade beam profiles, reduce output powers, and shorten laser lifetimes. Much has already been done to reduce impurities-cleaner supply gases are now available, and laser systems are being conshucted of materials that produce significantly lower amounts of gas impurit...

Modern gas-fired power stations are discussed as an alternative for replacing eventually decommissioned nuclear power stations. With an also increasing number of smallest-scale gas turbines, the importance of the gas network is hence likely to increase in coming years. The presence of converters as e.g. a combined cycle gas turbine raises the question if and to what extent the electrical networ...