Geothermal pipe collector

Abstract

A geothermal pipe collector is provided. The geothermal pipe collector is made from a polymer composition comprising: more than 50 wt % polyethylene, 0.1 wt %-35 wt % talc and 0.5 wt %-10 wt % carbon black.

1 . A geothermal pipe collector made from a polymer composition comprising:
 more than 50 wt % polyethylene,   0.1 wt %-35 wt % talc and   0.5 wt %-10 wt % carbon black.   
     
     
         2 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 0.1 wt %-3 wt % talc. 
     
     
         3 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 8 wt %-35 wt % talc. 
     
     
         4 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 8 wt %-15 wt % talc. 
     
     
         5 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 8 wt %-12 wt % talc. 
     
     
         6 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 0.5 wt %-5 wt % carbon black. 
     
     
         7 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises 1.5 wt %-3 wt % carbon black. 
     
     
         8 . The geothermal pipe collector according to  claim 1 , wherein the polymer composition comprises more than 75% polyethylene. 
     
     
         9 . The geothermal pipe collector according to  claim 1 , wherein the talc is talc in which the average aspect ratio is above 1.2. 
     
     
         10 . The geothermal pipe collector according to  claim 1 , wherein the inner surface of the pipe collector comprises recesses or protrusions for increasing the turbulence of a medium flowing in the pipe collector. 
     
     
         11 . The geothermal pipe collector according to  claim 10 , wherein the recesses or protrusions extends helically on the inner surface of the pipe collector, in relation to the length axis of the pipe collector, such that a turbulent flow is created in the direction of the length axis of the pipe collector. 
     
     
         12 . The geothermal pipe collector according to  claim 11 , wherein the helically extending recesses or protrusions alter direction at least at some portion along the length axis of the pipe collector. 
     
     
         13 . The geothermal pipe collector according to  claim 10 , wherein the recesses or protrusions extend continuously on the inner surface of the pipe collector. 
     
     
         14 . A method, comprising:
 using the polymer composition, defined in  claim 1 , for increasing thermal conductivity of a geothermal pipe collector.   
     
     
         15 . A method, comprising:
 using the polymer composition, defined in  claim 1 , for increasing mechanical properties of a geothermal pipe collector.