| Abstract |
This paper will present background, objectives and goals of a research necessary to be conducted to get answers on following question: what could and what should be composition of the cost-effective low-temperature co-generation and tri-generation projects. In Central European and Balkan region, reach on low temperature geothermal waters (less than 100degC), is in growth interest of governmental, public and private investors to participate in funding construction of energy plants which could utilize in a certain way these waters. In addition, current irreversibility of fossil energies/environmental exhaustion increases the importance of R&D search for new technologies of low-exergy sources utilization for higher-exergetic energy production. Hence, it is necessary to explore technical feasibility of efficient/cost-effective use of these waters for co- and tri-generation of electricity and heat for heating and/or cooling by absorption refrigeration. Namely, as a result of global warming a need for cooling, particularly air-conditioning of buildings is in extreme growth. Relevant study of Building’s thermal and electrical loads dynamics, and corresponding demands, should be performed based on which potential geo-co- and tri-generation systems could be optimized. It is well known that Kalina thermodynamic cycle can convert relatively low temperature energy, at relatively low temperature difference towards environment, to mechanical power and further to electricity. There are also some other thermodynamic cycles and processes of interest which could be potential solution for utilization of waters of even lower temperatures of those determined as limiting for the implementation of pure Kalina cycle. In addition, challenging question is possible hybridization - the use of these waters additionally heated to higher temperatures implementing other RES before performing co- generation. Finally paper proposes a study/R&D project to be carefully defined, organized and founded, to get reliable answer, based on which future development could be directed. |