Cooling system for communications devices with high power losses

A cooling system for communications equipment, said system comprising:

• a closed container for housing the equipment and protecting the equipment against environmental influences, said container having an outer wall made of heat conductive material, and said container being constructed for burial of a major portion of said container in the earth and for a heat transfer relationship therewith;
• a fluid filled conduit system including a conduit portion which is in heat transfer relationship with said outer wall and which has a fluid inlet positioned near the bottom of the container and a fluid outlet positioned above the fluid inlet, said inlet and outlet being associated with said major portion, said conduit system further including outside disposed conduits arranged outside said container for burial in the earth and for a heat transfer relationship therewith, said outside disposed conduits including a riser conduit connected to said outlet for receiving heated fluid from said conduit portion and a down conduit connected to said inlet for delivering cooled fluid to said conduit portion;
• and
• heat conducting means comprising Peltier elements, said equipment being in thermal communication with said wall and said conduit system only via said Peltier elements for transmitting heat generated by the equipment to said wall and to said conduit system, wherein heat generated by said equipment is transferred to the fluid in said conduit system and heat in said fluid is transferred to the earth, said fluid being circulated in said conduit system solely due to temperature and density variations of said fluid.