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. Piast�v 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.