ASSESSMENT OF OPERATION OF AN UNDERGROUND CLOSED-LOOP 
GEOTHERMAL HEAT EXCHANGER

W. Nowak and A. A. Stachel

UDC 532.546

The results of calculations that allow one to obtain the 
characteristics of a closed-loop geothermal heat exchanger (C-LGHE) 
on the basis of our own approximate mathematical model are presented. 
These results are given in the form of appropriate tables containing 
the reduced quantities characterizing operation of such a geothermal 
heat exchanger. On this basis, C-LGHE operation is analyzed and conclusions 
on the possibilities of utilization of geothermal energy in binary 
power stations are drawn.

Technical University of Szczacian, Department of Heat 
Engineering, Al. Piastăv 19, 70-310, Szczacian, Poland; email: andrzej.stachel@ps.pl. 
Published in Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 1, pp. 131-137, 
January-February, 2005. Original article submitted September 21, 
2004.