The Pilot Project of a Geothermal Heat Recuperation Cascade System for Fish and Vegetable Breeding, the Pas Meeri Geothermal Laboratory (Podhale Region, P)

Abstract

The article reveals a research run by PAS MEERI Geothermal Laboratory, concerning geothermal heat utilization for fish breeding and vegetable growing.

The investigation aims to evaluate technological ability and productive effect of water utilization having less than 40oC. The research is realized in a geothermal plant at Pokhale Geothermal Laboratory.

The plant uses water of 80-90oC temperature that is commercially exploited by PEC Geotermia Poshalanska S.A. to heat buildings and apartments as well as to supply domestic water.

The water coming back from clients has the temperature pf about 40-60oC (it depends on the demand) so the heat exchanger outlet geothermal water has a similar temperature range and is reinjected into the ground.

The mentioned temperature range (40-60oC)is a subject of a research project titled: Geothermal water heat use in enhanced fish and vegetable breeding.

The above effort result is an experiment and test structure construction for fish breeding and vegetable cultivation. A particular fish species was chosen for the experiment: an African sheatfish that grows very fast but bust be bred in warm water (the temperature needs to be over 25oC) The vegetable farming aimed to a significant vegetation period lengthening. The project and research work together led to structured that use geothermal heat. The latter can be commercially used, especially by already existing geothermal plants. The framed technique enables using so called "waste heat", unused in building and apartment heating networks.