Performance analysis of electricity generation by the medium temperature geothermal resources: Velika Ciglena case study

Abstract

a b s t r a c tDuring the last decade, a design of an energy efficient and cost effective geothermal plant represents a significant and on-going technical challenge in all the Western Balkan countries. In the Republic of Croatia, the geothermal field Velika Ciglena is identified as one of the most valuable geothermal heat sources and probably the location where the first geothermal plant in the Western Balkan area will be built. The purpose of this work is the conceptual design and performance analysis of the binary plants ethe one which operates under the Organic Rankine Cycle (ORC) and the other under Kalina (KLN) cycleewhich can be used for geothermal energy utilization in Velika Ciglena. A conceptual plant design is performed by the equation-oriented modelling approach and supported by the two steady-state spreadsheet simulators. The performance analysis of all design solutions is conducted through energy and exergy analysis, and by the estimated total cost of operating units in the plant. The results of the analysis indicate that the plant design based on the ORC cycle has a higher thermodynamic efficiency and lower cost of equipment, and consequently, it is more suitable for the future geothermal plant in Velika Ciglena.

Investigation of a Hybridized Cascade Trigeneration Cycle Combined with a District Heating and Air Conditioning System Using Vapour Absorption Refrigeration Cooling: Energy and Exergy Assessments

“…The efficiency of a condenser based on energy may be non-intuitive or even misleading since it does not account for irreversibility [109]. Only about 20% and 18% of recovered heat is utilized by the cascaded steam power plant, generating 10.35 MW and 7.63 MW of electricity in the topping and bottoming cycles, respectively.…”

Thermodynamic analysis and performance improvement of Irem geothermal power plant in Turkey: A case study of organic Rankine cycle

“…This amount corresponds to 0.3% of total electricity production in the world. In 2030s, this ratio is expected to be 0.6% . There are three different types of cycles which produce electricity using geothermal reservoirs in the world.…”

Comparison of Thermoeconomic Cost Calculation for a Binary Geothermal Power Plant

“…Especially comparisons of the two plant results are evaluated by simultaneously. Rašković et al [9] have conducted a case study on the performance analysis of electricity generation by medium temperature geothermal resources. Their results of the study showed that the plant design based on the Rankine cycle has a higher efficiency and lowest cost of equipment and also, this type of plant is more feasible for the future geothermal plants in low grade geothermal resources area.…”