Gas transfer station for a municipal gas network
In the gas transfer station of a Dutch city with a population of approx. 120,000 there is a Spilling gas expander with two-stage, 2-cylinder engine operating. This means that the relatively large difference between the pressure up and downstream from the station can be utilised with a high efficiency factor.
The division of the gradients in two stages and so more moderate individual pressure ratios permits the use of heat sources with comparably low temperature levels to preheat the natural gas over an expansion stage. The heat exchangers are supplied with the waste heat from a paper factory and a CHP over the district heat grid. The heat supply is controlled depending on the discharge temperature after the expansion motor.
