Possibilities of electricity generation in the Republic of Croatia by means of geothermal energy

Guzović, Zvonimir; Lončar, Dražen; Ferdelji, Nenad

doi:10.1016/j.energy.2010.04.036

Cited by 72 publications

(35 citation statements)

References 18 publications

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“…[11], where the authors employed the technology based on binary cycles (ORC and KLN) to utilize the available geothermal potential from the same field. In order to avoid repetitions, a model-building process is presented in this paper in the way which provides a minimal overview of a complete plant design.…”

Section: Physical and Mathematical Models Of Binary Plantsmentioning

confidence: 99%

“…The term "base-case" here denotes the plant in which operating parameters are determined by the simulation software in a design mode and under the same operating conditions as in the [11]. The results of the thermodynamic and economic analysis of both base-case plants lead to an adequate decision relating to the type of binary plant, ORC or KLN, which might be more appropriate for the application in the existing geothermal location.…”

Section: Introductionmentioning

confidence: 99%

“…In 2010, Guzovi c et al [11], presented the detailed descriptions and specifications of Velika Ciglena geothermal field, emphasising high geothermal gradients (in the range of 0.063e0.065 C/m), and plentiful production of hot geothermal water, (83.3 l/s, temperature 175 C) of that source. In that paper, the authors also proposed two conceptual models for the future geothermal plant in Velika Ciglena.…”

Section: Introductionmentioning

confidence: 99%

“…to distinguish the elements used in the present study from those used in Refs. [11], in the rest of the text, the latter is referred to as "reference elements", e.g. reference cycle, reference plant, reference model, reference parameters, etc.…”

Section: Introductionmentioning

confidence: 99%

“…[11]. The parameters of geothermal resource, ambient conditions and main parts of modelbuilding process have been adopted from that study, but the research methodology has been improved with respect to the new computer-aided design tools and more detailed performance analysis.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

Rašković

Guzović

Cvetković

2013

Energy

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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.

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Section: Physical and Mathematical Models Of Binary Plantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Rašković

Guzović

Cvetković

2013

Energy

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Thermoeconomic analysis of ground-source heat pump systems

Kwak

You²,

Oh³

et al. 2013

Int. J. Energy Res.

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SUMMARY A thermoeconomic analysis of a ground‐source heat pump (GSHP) system with a vertical or horizontal ground heat exchanger, a type of heat delivery system, was performed using the modified productive structure analysis method. In this analysis, the unit cost of geothermal heat delivered to a room using GSHP system was estimated. The unit cost of heat delivered was calculated to be $0.063/kWh for input of electricity with a unit cost of $0.140/kWh for a GSHP with a coefficient of performance (COP) of 3.27. Exergy destruction and monetary losses due to the irreversibility that occurs at each component of the system were also estimated. The unit cost of heat was found to be inversely proportional to the COP of the heat pump and proportional to the electricity input. The greatest monetary loss occurs in the geothermal heat exchanger in which considerable mass of brine flows in long pipes and in the fan‐coil unit which features a complex configuration of pipes in the air passages, respectively. Copyright © 2013 John Wiley & Sons, Ltd.

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Absorption power cycles for low-temperature heat sources using aqueous salt solutions as working fluids

Novotny

Kolovratník

2016

Int. J. Energy Res.

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Summary There are many low‐temperature heat sources; however, current technologies for their utilization have a relatively low efficiency and high cost. The leading technology in the low‐temperature domain for heat‐to‐work conversion is the organic Rankine cycle (ORC). Absorption power cycles (APCs) are a second option. Nearly all currently known APCs, most importantly the Kalina cycle, use a water‐ammonia mixture as their working fluids. This paper offers a theoretical exploration of the possibility of utilizing aqueous solutions of three salts (lithium bromide, lithium chloride and calcium chloride), known mainly from absorption cooling, as working fluids for APCs. The cycles are compared with a typical steam Rankine cycle, a water‐ammonia APC, and (subcritical) ORCs with a range of working fluids explored. The analysis includes a parasitic load for heat rejection by a cooling tower or air‐cooled condenser. The absorption cycles exhibit better performance than all Rankine‐based cycles analysed in temperatures below 120°C. For the LiBr‐based APC, a detailed thermal design of the cycle is provided for 100°C water as a heat source and a sensitivity analysis is performed of the parameters controlling the main cycle. Mechanical design considerations should not pose a problem for small power units, especially in the case of expansion machines, which are often problematic in ORCs. The salt‐based APCs also carry environmental benefits, as the salts utilized in the working fluids are non‐toxic. Copyright © 2016 John Wiley & Sons, Ltd.

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Possibilities of electricity generation in the Republic of Croatia by means of geothermal energy

Cited by 72 publications

References 18 publications

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

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

Thermoeconomic analysis of ground-source heat pump systems

Absorption power cycles for low-temperature heat sources using aqueous salt solutions as working fluids

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