SimNet SSGas is a software package for steady state simulation of gas networks. Depending on the version it allows for simulation of the gas network of low, medium, high medium, high pressure, and multi-pressure networks, where there are several levels of pressure at the same time.
The calculated network may have any number of sources with different pressures and flow rates, and any number of other nonlinear elements: compressor station (compressor), city gate station (pressure regulator) and the valve. These elements may work with a setpoint value of one of the following parameters: inlet pressure, the outlet pressure, the compression ratio (pressure reduction ratio), pressure drop (pressure increase), flow. In addition, the network may inlude any number of valves, which are operating in the open / closed states.
The results of the simulation are: gas pressure, temperature, and heat of combustion in the nodes, flow. decrease in the power, and the average values of: the flow velocity, the Reynolds number, friction factor, compressibility factor in the pipes, the missing values of parameters describing non-linear elements, pipeline linepack (accumulation of gas) in the network.
A calculation engine of the software package has an efficient algorithm, allowing for definition of the parameters of the gas, including: varying the height of the nodes, heat exchange with the environment, the Joule-Thomson effect , gas composition changes as a result of mixing of the gas streams. The program has its own module which allows to calculate the actual gas consumption in the network.
The package allows to perform the following tasks: