The economics of geothermal pumped well power projects
Geothermal pumped well projects provide power to the grid at a contract price and terms negotiated with the power off-taker. This can vary significantly from country to country, but as…
Geothermal
Extended reach drilling for geothermal energy production
The energy transition is about pipe, lots of pipe. Where gas can be transported across the globe, geothermal energy, especially the low-temperature version of it that is mainly used for…
A geothermal gold rush
When it comes to producing geothermal energy, Munich is without a doubt the place to be in Germany. As the map here clearly shows, the city is dotted by wells…
Groundwater flow – a potential cost-saver for shallow geothermal loops
The energy transition is all about pipes. Where a single gas well was sufficient to deliver energy to power an entire city until recently, closed-loop geothermal boreholes are now increasingly…
Understanding geothermal energy
The energy contained in a geothermal fluid is defined by its enthalpy, generally given in kilojoules per kilogram (kJ/kg). For a liquid, the enthalpy is primarily determined by its temperature.…
A geothermal blowout in Japan
He often tweets about mud volcanoes, but today Mark Tingay retweeted a message from a Japanese user of Twitter who filmed a violent eruption of steam – possibly mixed with…
The basics of submersible pumps in geothermal projects
Pumped-well geothermal projects utilize “binary” power plant technology which consists of Organic Rankine Cycle (ORC) heat exchangers. The geothermal fluid is pumped from the wells as a single phase liquid…
Coring the seal of a geothermal reservoir
In the little village of Monster, which ironically translates to “sample” in Dutch, operator HVC recently completed a new geothermal well. The well targeted the Lower Cretaceous Delft Sandstone, from…
Ampfing’s flirt with the subsurface is not over yet
There are probably not too many climate activists in the small village of Ampfing in Southern Germany, as the information plaques and monuments dedicated to the local history of oil…
Revolutionising shallow geothermal borehole drilling
“We have been drilling in London’s complex geology for years now. The progression from completing only one borehole every two days, to now having the capability of delivering two in…
A potential depth record?
The website ThinkGeoenergy reported in February that preparations were ongoing for drilling a geothermal well in the south of Poland, with a potential terminal depth of 7 km. Reaching this…
Pumped geothermal power projects – a global overview
Pumped-well geothermal projects utilise the moderate temperature range of geothermal fluids between 100-190 C. Below this temperature, geothermal fluids are generally used for direct heating and above this the fluids…