Heat has been radiating from the Earth’s core for billions of years. This geothermal energy rises upwards to the surface and causes large amounts of underground water to be heated. In some locations, like the central North Island of New Zealand, these underground reservoirs reach the surface and can be tapped into with wells to exploit the heat to generate renewable electricity.
Pressure Worx engineers have considerable experience within the Geothermal Sector having designed and supplied many heat exchangers for geothermal projects in the North Island of New Zealand. These are typically large shell & tube type units that recover heat from geothermal streams of steam and condensate to generate steam that is then used in steam turbines for generation of electricity. The heat exchanger design may incorporate pre-heating and vapourising sections either within a common large exchanger or as two separate smaller units.
Often these large exchangers are made from carbon steel, however Pressure Worx also offers stainless steel, duplex or super duplex construction when the fluid properties dictate a superior material is required.