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Aleksandra Borsukiewicz
School of Mechanical & Mining Engineering, The University of Queensland, Queensland 4072, Australia

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Journal article
Published: 12 October 2020 in Energies
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Power plants based on organic Rankine cycle (ORC) are known for their capacity in converting low and medium-temperature energy sources to electricity. To find the optimal operating conditions, a designer must evaluate the ORC from different perspectives including thermodynamic performance, technological limits, economic viability, and environmental impact. A popular approach to include different criteria simultaneously is to formulate a bi-objective optimization problem. This type of multi-objective optimization (MOO) allows for finding a set of optimal design points by defining two different objectives. Once the optimization is completed, the decision-making analysis shall be carried out to identify the final design solution. This study aims to develop a decision-making tool for facilitating the choice of the optimal design point. The proposed procedure is coded in MATLAB based on the commonly used Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). By providing the capability to graphically identify the decisions taken, the tool developed in the study is called Tracking and Recognizing Alternative Design Solutions (TRADeS). Analysis of our data shows that certain regions of Pareto set points should be excluded from the design space. It was noted that in these regions a high rate at which one of the objectives moves away from its ideal value coincides with a low rate at which the second criterion approaches its ideal solution. Hence, it was recommended that the criteria weights corresponding to excluded regions of the Pareto set should be discarded when selecting the final design point. By comparing the results obtained using the proposed model to those of existing decision-making techniques, it was concluded that while the known approaches are appropriate for an easy and fast selection of the final design point, the presented procedure allows for a more comprehensive and well-rounded design. It was shown that our design tool can be successfully applied in the decision-making analysis for problems that aim at optimizing the ORC using two design criteria. Finally, the proposed software benefits from a generic structure and is easy to implement which will facilitate its use in other industrial applications.

ACS Style

Marcin Jankowski; Aleksandra Borsukiewicz; Kamel Hooman. Development of Decision-Making Tool and Pareto Set Analysis for Bi-Objective Optimization of an ORC Power Plant. Energies 2020, 13, 5280 .

AMA Style

Marcin Jankowski, Aleksandra Borsukiewicz, Kamel Hooman. Development of Decision-Making Tool and Pareto Set Analysis for Bi-Objective Optimization of an ORC Power Plant. Energies. 2020; 13 (20):5280.

Chicago/Turabian Style

Marcin Jankowski; Aleksandra Borsukiewicz; Kamel Hooman. 2020. "Development of Decision-Making Tool and Pareto Set Analysis for Bi-Objective Optimization of an ORC Power Plant." Energies 13, no. 20: 5280.

Journal article
Published: 06 August 2020 in Applied Sciences
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Global energy consumption is increasing every year, and, despite their many negative impacts, fossil fuels are a major source of energy, but their reserves are gradually depleting. One of the promising but underutilized resources is plant biomass (phytomass). The main problem of plant biomass combustion is the low melting temperature of ash, but there are also problems with corrosion of heat exchangers and clogging of heat-exchanging surfaces. This work is concerned with the production of straw pellets in order to increase the melting temperature of ash by adding an additive. The paper sludge contains substances that can increase the melting point of ash and was therefore added to the pellet samples. This additive was mixed with straw in ratios from 90:10, 80:20 and 70:30 (straw/paper sludge). The use of paper sludge showed positive effects on increasing the melting temperature of the ash samples. The deformation temperature of the ash has already risen from 1020 to 1260 °C after the addition of 10% sludge, which is comparable to wood pellets.

ACS Style

Radovan Nosek; Sebastian Werle; Aleksandra Borsukiewicz; Agnieszka Żelazna; Grzegorz Łagód. Investigation of Pellet Properties Produced from a Mix of Straw and Paper Sludge. Applied Sciences 2020, 10, 5450 .

AMA Style

Radovan Nosek, Sebastian Werle, Aleksandra Borsukiewicz, Agnieszka Żelazna, Grzegorz Łagód. Investigation of Pellet Properties Produced from a Mix of Straw and Paper Sludge. Applied Sciences. 2020; 10 (16):5450.

Chicago/Turabian Style

Radovan Nosek; Sebastian Werle; Aleksandra Borsukiewicz; Agnieszka Żelazna; Grzegorz Łagód. 2020. "Investigation of Pellet Properties Produced from a Mix of Straw and Paper Sludge." Applied Sciences 10, no. 16: 5450.

Journal article
Published: 29 April 2020 in Energy
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The effects of geothermal brine salinity on optimal operating parameters of an organic Rankine cycle (ORC) power plant are investigated. For a more comprehensive understanding of the problem, a multi-objective optimization study is conducted aiming at minimizing the total heat transfer area while maximizing the exergy efficiency of the ORC. The optimization problem is solved using Non-dominated Sorting Genetic Algorithm-II. The multi-criteria decision making results show that an increase in the salinity (from 0.00 kgkg−1 to 0.12 kgkg−1) lowers the total heat transfer area and exergy efficiency by 4.39% (from 82.0 m2 to 78.4 m2) and 7.72% (from 28.5% to 26.3%), respectively. An adverse impact of the salinity on the exergy efficiency is dominant resulting in higher system size (reaching 8.00%) for obtaining the same exergy efficiency. For the same reason, a lower exergy efficiency (up to 5.00%) is reported for a system with the predefined heat exchangers size. A sensitivity analysis reveals that the salinity influence on the heat transfer area and exergy efficiency is mainly associated with a decrease in the mass flow rate of the working fluid. Moreover, salinity can increase the exergy flow rate of the brine thereby impacting the exergy efficiency. It is concluded that the salinity of the geothermal water should be considered in designing the ORC for a geothermal power plant because of its significant impact on the performance of the system.

ACS Style

Marcin Jankowski; Aleksandra Borsukiewicz; Sławomir Wiśniewski; Kamel Hooman. Multi-objective analysis of an influence of a geothermal water salinity on optimal operating parameters in low-temperature ORC power plant. Energy 2020, 202, 117666 .

AMA Style

Marcin Jankowski, Aleksandra Borsukiewicz, Sławomir Wiśniewski, Kamel Hooman. Multi-objective analysis of an influence of a geothermal water salinity on optimal operating parameters in low-temperature ORC power plant. Energy. 2020; 202 ():117666.

Chicago/Turabian Style

Marcin Jankowski; Aleksandra Borsukiewicz; Sławomir Wiśniewski; Kamel Hooman. 2020. "Multi-objective analysis of an influence of a geothermal water salinity on optimal operating parameters in low-temperature ORC power plant." Energy 202, no. : 117666.

Journal article
Published: 01 April 2020 in Energies
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In the last decade, particular attention has been paid to the organic Rankine cycle (ORC) power plant, a technology that implements a classical steam Rankine cycle using low-boiling fluid of organic origin. Depending on the specific application and the choice of the designer, the ORC can be optimized using one or several criteria. The selected objectives reflect various system performance aspects, such as: thermodynamic, economic, environmental or other. In this study, a novel criterion called exergy utilization index (XUI) is defined and used to maximize the utilization of an energy source in the ORC system. The maximization of the proposed indicator is equivalent to bring the heat carrier outlet temperature to the ambient temperature as close as possible. In the studied case, the XUI is applied along with the total heat transfer area of the system, and the multi-objective optimization is performed in order to determine the optimal operating conditions of the ORC. Moreover, to reveal a relationship between the XUI and important ORC performance indicators, a parametric study is conducted. Based on the results, it has been found that high values of the XUI (~80%) correspond to optimal values of exergy-based indicators such as: exergy efficiency, waste exergy ratio, environmental effect factor or exergetic sustainability index. Furthermore, the values of the XUI = 60%–80% are associated with beneficial economic characteristics reflected in a low payback period (<11.3 years). When considering the ecological aspect, the maximization of XUI has resulted in minimization of exergy waste to the environment. In general, the simple formulation and straightforward meaning make the XUI a particularly useful indicator for the preliminary evaluation and design of the ORC. Furthermore, the comparative analysis with respect to other well-known performance indicators has shown that it has a potential to be successfully applied as the objective function in the optimization of ORC power plants.

ACS Style

Marcin Jankowski; Aleksandra Borsukiewicz. A Novel Exergy Indicator for Maximizing Energy Utilization in Low-Temperature ORC. Energies 2020, 13, 1598 .

AMA Style

Marcin Jankowski, Aleksandra Borsukiewicz. A Novel Exergy Indicator for Maximizing Energy Utilization in Low-Temperature ORC. Energies. 2020; 13 (7):1598.

Chicago/Turabian Style

Marcin Jankowski; Aleksandra Borsukiewicz. 2020. "A Novel Exergy Indicator for Maximizing Energy Utilization in Low-Temperature ORC." Energies 13, no. 7: 1598.

Journal article
Published: 24 January 2019 in Journal of Cleaner Production
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Organic Rankine Cycle (ORC) power plants are constantly developing systems and, apart from Stirling engine, are currently the only commercially available technology, which allows electricity generation using low and medium temperature waste thermal energy. A lot of effort has been devoted to improve analysis techniques, with the aim to find the most favorable parameters of ORC as well as the best working fluid for a certain type of energy source and configuration of the system. The aim of the paper is to present a method to determine an optimal pinch point temperature difference interval (OPPTDI) using multi-criteria approach with G(X) as multi-objective function and pinch point temperature difference as a decision variable. The analysis has been carried out for five selected organic fluids: R245fa, R1234yf, R1234ze, R227ea, and R152a. The optimization model has been solved using the linear weighted sum method. The applied technique specifies OPPTDI by assigning different values of weights w1 and w2 to the individual objective functions f1 (economic index) and f2 (environmental index), which are the components of the global function G. The proposed method should be perceived as an initial evaluation of the pinch point temperature difference interval, giving an insight for the designer what is the potentially optimal range of the considered quantity and moreover – the optimal values region of such parameter, if one of the objective functions is evaluated to be more significant than the other.

ACS Style

Marcin Jankowski; Aleksandra Borsukiewicz; Katarzyna Szopik-Depczyńska; Giuseppe Ioppolo. Determination of an optimal pinch point temperature difference interval in ORC power plant using multi-objective approach. Journal of Cleaner Production 2019, 217, 798 -807.

AMA Style

Marcin Jankowski, Aleksandra Borsukiewicz, Katarzyna Szopik-Depczyńska, Giuseppe Ioppolo. Determination of an optimal pinch point temperature difference interval in ORC power plant using multi-objective approach. Journal of Cleaner Production. 2019; 217 ():798-807.

Chicago/Turabian Style

Marcin Jankowski; Aleksandra Borsukiewicz; Katarzyna Szopik-Depczyńska; Giuseppe Ioppolo. 2019. "Determination of an optimal pinch point temperature difference interval in ORC power plant using multi-objective approach." Journal of Cleaner Production 217, no. : 798-807.

Conference paper
Published: 23 January 2019 in IOP Conference Series: Earth and Environmental Science
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This paper concerns multicriteria analysis of the selection of working medium for the low-temperature ORC microsystem. The criteria for the selection of the working medium are: thermodynamic efficiency (efficiency and power of the cycle), environmental impact and safety of the substance as well as the cost of installation on the basis of the heat exchanger surface analysis. The analysis was done for five organic fluids: R1234ze, R1234yf, R152a, R143a and propylene, and the source of the powering heat for the power plant is oil heated to the temperature of 85°C while cooling the screw compressor. Based on the results of calculations and analysis of the working substance properties it has been found that the fluid that best meets the criteria mentioned above is R1234yf. The minimal environmental impact and the smallest heat exchange surface of the vapour generator, with comparable turbine power and the ORC efficiency compared to other fluids, make it the best choice. The disadvantage of this liquid is the relatively high price (~ 140€/kg). A cheaper alternative may be R1234ze (~ 35€/kg). Its environmental impact is also negligible and the calculated heat exchange surfaces of the vapour generator are only slightly larger.

ACS Style

M Jankowski; A Borsukiewicz; P Klonowicz. Selection of working medium for low-temperature ORC based on thermodynamic, economic and environmental criteria. IOP Conference Series: Earth and Environmental Science 2019, 214, 012101 .

AMA Style

M Jankowski, A Borsukiewicz, P Klonowicz. Selection of working medium for low-temperature ORC based on thermodynamic, economic and environmental criteria. IOP Conference Series: Earth and Environmental Science. 2019; 214 (1):012101.

Chicago/Turabian Style

M Jankowski; A Borsukiewicz; P Klonowicz. 2019. "Selection of working medium for low-temperature ORC based on thermodynamic, economic and environmental criteria." IOP Conference Series: Earth and Environmental Science 214, no. 1: 012101.

Conference paper
Published: 10 February 2017 in E3S Web of Conferences
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The paper presents the calculation results of efficiency of the subcritical low temperature ORC power station powered by waste heat resulting from the process of cooling a stationary compression ignition engine. The source of heat to supply the ORC power station is the heat in a form of water jet cooling the engine at a temperature of 92°C, and the exhaust gas stream at a temperature of 420°C. The study considers three variants of systems with the ORC power stations with different ways of using heat source. The first variant assumes using just engine cooling water to power the ORC station. In the second variant the ORC system is powered solely by a heat flux from the combustion gases by means of an intermediary medium - thermal oil, while the third variant provides the simultaneous management of both heat fluxes to heat the water stream as a source of power supply to the ORC station. The calculations were made for the eight working media belonging both to groups of so-called dry media (R218, R1234yf, R227ea) and wet media (R32, R161, R152a, R134a, R22).

ACS Style

Szymon Mocarski; Aleksandra Borsukiewicz-Gozdur. Application of ORC power station to increase electric power of gas compression ignition engine. E3S Web of Conferences 2017, 13, 3002 .

AMA Style

Szymon Mocarski, Aleksandra Borsukiewicz-Gozdur. Application of ORC power station to increase electric power of gas compression ignition engine. E3S Web of Conferences. 2017; 13 ():3002.

Chicago/Turabian Style

Szymon Mocarski; Aleksandra Borsukiewicz-Gozdur. 2017. "Application of ORC power station to increase electric power of gas compression ignition engine." E3S Web of Conferences 13, no. : 3002.

Research article
Published: 03 July 2015 in Waste Management & Research: The Journal for a Sustainable Circular Economy
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Poland, as for Europe, is a country with an average forest cover of approximately 30%. In these forests, more than 37M m3 of wood, mostly coniferous (over 80%), is harvested per year. In 2012, 4.2M m3 of sawn timber was produced (sawn timber without factory lumber). At the same time, in Poland there are over 8000 sawmills, whereas only about 700 of them saw over 90% of the harvested timber. So much fragmentation is a major cause of low sawmills innovation, particularly of those small ones. However, in recent years, a trend of development in this sector is noticeable, and it is through rationalisation of material and energy economy. One of the methods to increase the technical and economic effectiveness of enterprises involved in woodworking is to build in the combined heat and power system (CHP) plant with the ORC system into the existing infrastructure, which will be matched to the needs of the company. This article presents an analysis of the profitability of the investment based on the example of a medium-sized company sawing approximately 50 000 m3 of timber per year, and the economic analysis was performed for prices and costs valid in Poland. The analysis made for the 1650 kWel organic Rankine cycle (ORC) system, has resulted in a profitability index PI = 1.3, on the assumptions that the ORC system operates for 6000 h y−1, will be purchased at the price of 4500 € kWel −1 and at the price of electricity sales of 130 € MWh−1.

ACS Style

A Borsukiewicz-Gozdur; Piotr Klonowicz; D Król; S Wiśniewski; Katarzyna Zwarycz-Makles. Techno-economic analysis of CHP system supplied by waste forest biomass. Waste Management & Research: The Journal for a Sustainable Circular Economy 2015, 33, 748 -754.

AMA Style

A Borsukiewicz-Gozdur, Piotr Klonowicz, D Król, S Wiśniewski, Katarzyna Zwarycz-Makles. Techno-economic analysis of CHP system supplied by waste forest biomass. Waste Management & Research: The Journal for a Sustainable Circular Economy. 2015; 33 (8):748-754.

Chicago/Turabian Style

A Borsukiewicz-Gozdur; Piotr Klonowicz; D Król; S Wiśniewski; Katarzyna Zwarycz-Makles. 2015. "Techno-economic analysis of CHP system supplied by waste forest biomass." Waste Management & Research: The Journal for a Sustainable Circular Economy 33, no. 8: 748-754.

Journal article
Published: 01 February 2014 in Applied Thermal Engineering
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ACS Style

Piotr Klonowicz; Aleksandra Borsukiewicz-Gozdur; Paweł Hanausek; Władysław Kryłłowicz; Dieter Brüggemann. Design and performance measurements of an organic vapour turbine. Applied Thermal Engineering 2014, 63, 297 -303.

AMA Style

Piotr Klonowicz, Aleksandra Borsukiewicz-Gozdur, Paweł Hanausek, Władysław Kryłłowicz, Dieter Brüggemann. Design and performance measurements of an organic vapour turbine. Applied Thermal Engineering. 2014; 63 (1):297-303.

Chicago/Turabian Style

Piotr Klonowicz; Aleksandra Borsukiewicz-Gozdur; Paweł Hanausek; Władysław Kryłłowicz; Dieter Brüggemann. 2014. "Design and performance measurements of an organic vapour turbine." Applied Thermal Engineering 63, no. 1: 297-303.

Journal article
Published: 08 May 2013 in Energy
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ACS Style

Aleksandra Borsukiewicz-Gozdur. Exergy analysis for maximizing power of organic Rankine cycle power plant driven by open type energy source. Energy 2013, 62, 73 -81.

AMA Style

Aleksandra Borsukiewicz-Gozdur. Exergy analysis for maximizing power of organic Rankine cycle power plant driven by open type energy source. Energy. 2013; 62 ():73-81.

Chicago/Turabian Style

Aleksandra Borsukiewicz-Gozdur. 2013. "Exergy analysis for maximizing power of organic Rankine cycle power plant driven by open type energy source." Energy 62, no. : 73-81.

Journal article
Published: 31 March 2013 in Applied Thermal Engineering
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Calculation results for the pumping work in the ORC systems are presented. Analysis has been carried out for 18 different organic fluids that can be used as working media in the subcritical ORC power plants. An attempt was made to find correlations between various thermo-physical properties of working fluids, specific work and power of the cycle. The simulation results allow a statement that the working substances with relatively low critical temperature have a greater cycle pressure range for the specified cycle temperature range than those with higher critical temperatures. The greater cycle pressure range contributes to a higher pumping power demand. Due to the fact that the specific pumping work does not result in explicit statement on the suitability of some working fluid to a specified ORC power plant, a definition of the power decrease factor κ is introduced.

ACS Style

Aleksandra Borsukiewicz-Gozdur. Pumping work in the organic Rankine cycle. Applied Thermal Engineering 2013, 51, 781 -786.

AMA Style

Aleksandra Borsukiewicz-Gozdur. Pumping work in the organic Rankine cycle. Applied Thermal Engineering. 2013; 51 (1-2):781-786.

Chicago/Turabian Style

Aleksandra Borsukiewicz-Gozdur. 2013. "Pumping work in the organic Rankine cycle." Applied Thermal Engineering 51, no. 1-2: 781-786.

Journal article
Published: 01 September 2012 in Archives of Thermodynamics
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In the paper presented are definitions of specific indicators of power which characterize the operation of the organic Rankine cycle (ORC) plant. These quantities have been presented as function of evaporation temperature for selected working fluids of ORC installation. In the paper presented also is the procedure for selection of working fluid with the view of obtaining maximum power. In the procedure of selection of working fluid the mentioned above indicators are of primary importance. In order to obtain maximum power there ought to be selected such working fluids which evaporate close to critical conditions. The value of this indicator increases when evaporation enthalpy decreases and it is known that the latent heat of evaporation decreases with temperature and reaches a value of zero at the critical point.

ACS Style

Władysław Nowak; Aleksandra Borsukiewicz-Gozdur; Sławomir Wiśniewski. Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation. Archives of Thermodynamics 2012, 33, 73 -83.

AMA Style

Władysław Nowak, Aleksandra Borsukiewicz-Gozdur, Sławomir Wiśniewski. Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation. Archives of Thermodynamics. 2012; 33 (3):73-83.

Chicago/Turabian Style

Władysław Nowak; Aleksandra Borsukiewicz-Gozdur; Sławomir Wiśniewski. 2012. "Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation." Archives of Thermodynamics 33, no. 3: 73-83.

Journal article
Published: 01 September 2012 in Archives of Thermodynamics
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In the paper presented is an idea of organic Rankine cycle (ORC) operating with supercritical parameters and so called dry fluids. Discussed is one of the methods of improving the effectiveness of operation of supercritical cycle by application of internal regeneration of heat through the use of additional heat exchanger. The main objective of internal regenerator is to recover heat from the vapour leaving the turbine and its transfer to the liquid phase of working fluid after the circulation pump. In effect of application of the regenerative heat exchanger it is possible to obtain improved effectiveness of operation of the power plant, however, only in the case when the ORC plant is supplied from the so called sealed heat source. In the present paper presented is the discussion of heat sources and on the base of the case study of two heat sources, namely the rate of heat of thermal oil from the boiler and the rate of heat of hot air from the cooler of the clinkier from the cement production line having the same initial temperature of 260 oC, presented is the influence of the heat source on the justification of application of internal regeneration. In the paper presented are the calculations for the supercritical ORC power plant with R365mfc as a working fluid, accomplished has been exergy changes and exergy efficiency analysis with the view to select the most appropriate parameters of operation of the power plant for given parameters of the heat source.

ACS Style

Aleksandra Borsukiewicz-Gozdur. Exergy analysis of internal regeneration in supercritical cycles of ORC power plant. Archives of Thermodynamics 2012, 33, 48 -60.

AMA Style

Aleksandra Borsukiewicz-Gozdur. Exergy analysis of internal regeneration in supercritical cycles of ORC power plant. Archives of Thermodynamics. 2012; 33 (3):48-60.

Chicago/Turabian Style

Aleksandra Borsukiewicz-Gozdur. 2012. "Exergy analysis of internal regeneration in supercritical cycles of ORC power plant." Archives of Thermodynamics 33, no. 3: 48-60.

Journal article
Published: 01 January 2007 in Thermal Science
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In the work presented are the results of investigations regarding the effectiveness of operation of power plant fed by geothermal water with the flow rate of 100, 150, and 200 m3/h and temperatures of 70, 80, and 90 ?C, i. e. geothermal water with the parameters available in some towns of West Pomeranian region as well as in Stargard Szczecinski (86.4 ?C), Poland. The results of calculations regard the system of geothermal power plant with possibility of utilization of heat for technological purposes. Analyzed are possibilities of application of different working fluids with respect to the most efficient utilization of geothermal energy. .

ACS Style

Aleksandra Borsukiewicz-Gozdur; Wladyslaw Nowak. Feasibility study and energy efficiency estimation of geothermal power station based on medium enthalpy water. Thermal Science 2007, 11, 135 -142.

AMA Style

Aleksandra Borsukiewicz-Gozdur, Wladyslaw Nowak. Feasibility study and energy efficiency estimation of geothermal power station based on medium enthalpy water. Thermal Science. 2007; 11 (3):135-142.

Chicago/Turabian Style

Aleksandra Borsukiewicz-Gozdur; Wladyslaw Nowak. 2007. "Feasibility study and energy efficiency estimation of geothermal power station based on medium enthalpy water." Thermal Science 11, no. 3: 135-142.