INFLUENCE OF RETURN TEMPERATURE OF MUNICIPAL WATER ON THE EFFECTIVENESS OF GEOTHERMAL ENERGY ACQUISITION IN THE HEAT EXCHANGER CO-OPERATING WITH THE PEAK-LOAD BOILER

Abstract

One of the conditions for rationalisation of geothermal water
use is to enable the most efficient heat transfer between geothermal
water and municipal water. In district heating networks
utilising geothermal heat it is important to bring the return water
temperature from the heat installations of recipients to the lowest
level, so that it could determine the temperature of pumped
geothermal water. In order to fulfil that condition it is
advised to implement predominantly low-temperature heat
receivers or at least combination of recipients having high temperature
installations with recipients having low-temperature
installations, which enables effective cooling of municipal
water. In this paper has been presented the method of assessment
the possibility of extraction and utilisation of geothermal
energy for selected district heating networks at
combination of two groups of heat receivers with application
of geothermal water heat exchangers.