Last number of the PLYN journal – 3/2019
- AThe Future of Power-to-Gas in the CR: Biological Methanation
- The First Biomethane to Flow into the HP Pipeline System in Rapotín
- Gas System Calculations Considering Alternative Fuels (Biomethane and Hydrogen)
- Using CNG’s Energy in the Distribution System Operated by GasNet, s.r.o.
- HP Pipelines of Plastics?
- Heat Supply Pipeline from the Temelín NPP to České Budějovice and the Use of Automatic Welding Machines
- Flue Extraction Systems for Gas-fired Condensing Appliances
- NGVs May Drive Circular Economy in European Transport
- In Brief...
- Other Periodicals
- CNG Motoring – New Fuelling Stations
THE CGA‘S ACTIVITIES
- Open Day As Part of the Celebrations of the CGA’s 100th Anniversary
- The Full Gas Press Conference
- Support for Gas Education
- The Board Congratulates
Sector Coupling, Electricity and Gas: Under What Circumstances Is P2G Profitable?
Matěj Hrubý, Michal Macenauer
Summary: Sector coupling means the interconnection of the electricity, gas and heat supply industries through their energy balances. The usable energy transformations include, for example, the transformation of electricity to gas (Power to Gas, P2G) and the transformation of electricity to heat (Power to Heat, P2H), both of them for the purpose of balancing the electric grid. The authors analyse the P2G transformation and answer the question of whether, and under what circumstances, this transformation process can be profitable.
Evaluation of the Negative Impacts of Overhead Electric Lines on the System of PPD’s High-pressure Gas Pipelines in the Prague Agglomeration
Zbyněk Janda, Daniel Hlinomaz, Pavel Veleta
Summary: In case of failures on high voltage (VVN) and very high voltage (ZVN) lines, coated steel pipes can be exposed to a dangerous increase in voltage and, in their operating modes, to corrosion effects. At present, these VVN and ZVN impacts on gas installations are normally predicted by calculation under the applicable standards at the stage of designing the construction of the electrical line or piping. However, there are some parallel pipelines and electric lines for which the negative impacts may not have been calculated, since they were put into operation before the effective date of the relevant standard. With a view to ensuring the safety of operation and an adequate useful life of gas installations in the parallel sections, Pražská plynárenská Distribuce, a.s., i.e. the operator of gas installations in the Prague agglomeration, commissioned a study of the dangerous and corrosive effects of VVN. The contribution describes the method using which the study was prepared and its conclusions and technical benefits for cathodic protection. Equally importantly, the study also offers economic benefits for gas installation operators.
Applying Expansion Machines Instead of Gas Pressure Regulators in Czech Natural Gas Networks
Petr Buryan, Pavel Schustr
Summary: Significant amounts of energy are wasted due to the current method of natural gas pressure control in regulating stations, of which there are around 6,000 in the Czech Republic. (The theoretical energy potential of all regulating stations in the country is 640 GWh/year). Utilising this energy in expansion turbines would contribute to reduction in greenhouse gas emissions. A method for using these losses should help to include this process in programmes for support of the development of new renewable energy sources and ‘the gas package’ of the European Commission.
How to Monitor Gas Pipelines Effectively? We Are Testing ‘Air’ Methods of Gas Pipeline Monitoring
Petr Pavlík, Libor Čagala
Summary: Periodical checks and inspections of gas pipelines are some of the basic activities for ensuring the safety and reliability of their operation. The pipeline owners and operators, in this case a DSO, continuously improve the operations related to the monitoring and effective prediction of any activities that may pose risk to the operability and safety of the distribution system. One of the key areas is also prevention of emergencies caused by third-party damage to gas installations, i.e. construction activities of investors who fail to respect the requirements for work in gas pipeline protection and safety zones. This contribution describes the tools and technological options for effective supervision over the operated installation ‘from the air’ using the Earth Observation (EO) technology.
LNG to Launch Not Only American Satellites to Orbit
Summary: The properties of liquefied natural gas (LNG) combined with the development of its production are opening opportunities in hitherto closed sectors. One of them is the space programmes in the US and Europe. The contribution compares conventional rocket fuels with LNG and provides information about the advances and plans of two programmes.
Petr Novotný – Topic: Bio-waste Use