Skip to main content

Science – Society – Technology

Table 7 Course of events during the 3 months before scale sample collection. Evaporator cleaning is either done by flushing the evaporator, or by opening it with subsequent mechanical removal, or by chemical cleaning. \({\hbox {T}}_{pre}\) = temperature in the ground-level pipes before interruption, \({\hbox {T}}_{post}\) = temperature in the ground-level pipes at the end of the interruption

From: Rippled scales in a geothermal facility in the Bavarian Molasse Basin: a key to understand the calcite scaling process

Date Cause Duration Flow rate, L/s \({\hbox {T}}_{pre}\), \(^\circ \hbox {C}\) \({\hbox {T}}_{post}\), \(^\circ \hbox {C}\) Remark
Aug 3 Electric 11 d 0 140 25  
Aug 17 Scales 3 h 110 139 126 Flushing of evaporator
Aug 20 Scales 3 h 0 140 116 Mechanical removal
Aug 24 Synchronization 2 h 0 141 120  
Aug 28 Scales 2 h 110 139 132 Flushing of evaporator
Sep 3 Scales 4 h + 2 h 0 140 118 Mechanical removal, 2 pump starts
Sep 12 Revision 13 d 5 140 20 Chemical cleaning
Oct 1 Scales 3 h 0 140 20 Sample collection