Title: Combined use of geothermal energy in series and parallel

Abstract

The combined use (generation of electricity and district
heating) or the direct use (industrial application) of
geothermal energy is more efficient from the thermal point of
view than that of only generating electricity . Examples
generation of electricity and industrial applications in
Iceland such as: fish drying and geochemicals extraction at
the Reykjanes peninsula, the power plant at Svartsengi and
the diatomite plant at Namafjall.
The utilization of geothermal energy for combined use
(generation of electricity and drying) both for a production
in series and in parallel are analyzed. Two types of rotary
dryers, one which is air heated and the other an indirectheat-
rotary-steam-tube dryer are considered for both types of
productions and compared. The production in series with the
use of a back-pressure turbine and an indirect-heat-rotarysteam-
tube dryer is the most advantageous from the total
thermal efficiency point of view.