This page has only limited features, please log in for full access.

Prof. Piotr Kolasiński
Wrocław University of Science and Technology, Wroclaw, Poland

Basic Info


Research Keywords & Expertise

0 Energy Management
0 Heat Transfer
0 Renewable Energy
0 Thermodynamics
0 Waste energy recovery

Fingerprints

Organic Rankine cycle (ORC) systems
Volumetric machines
Heat Transfer

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Editorial
Published: 18 March 2021 in Energies
Reads 0
Downloads 0

The scientific and technical issues related to energy harvesting and conversion are inseparably bound to the issues of environmental protection. Energy conversion systems and devices that are applied for converting the chemical energy contained in different fuels into heat, electricity, and cold in industry and housing are sources of different gases and solid particle emissions. Thus, the development of different technologies for energy conversion and environmental protection that can be jointly applied to cover growing energy needs has become a crucial challenge for scientists and engineers around the world. Progress in the precise description, modeling, and optimization of physical and chemical phenomena related to these energy conversion systems is a key research and development field for the economy. Legal and social issues that are affecting key aspects and problems related to the energy conversion and power sector are also significant and worth investigating. The aim of Energy Processes, Systems and Equipment Special Issue is to publish selected high-quality papers from the XV Scientific Conference POL-EMIS 2020: Current Trends in Air and Climate Protection—Control Monitoring, Forecasting, and Reduction of Emissions (29–31 March 2021, Wrocław) and other papers related to the field of energy conversion.

ACS Style

Izabela Sówka; Sławomir Pietrowicz; Piotr Kolasiński. Energy Processes, Systems and Equipment. Energies 2021, 14, 1701 .

AMA Style

Izabela Sówka, Sławomir Pietrowicz, Piotr Kolasiński. Energy Processes, Systems and Equipment. Energies. 2021; 14 (6):1701.

Chicago/Turabian Style

Izabela Sówka; Sławomir Pietrowicz; Piotr Kolasiński. 2021. "Energy Processes, Systems and Equipment." Energies 14, no. 6: 1701.

Journal article
Published: 04 February 2021 in Energy Conversion and Management
Reads 0
Downloads 0

Air pollution with dust is particularly noticeable in winter. This problem is visible especially in those living areas in which furnaces fed by low-quality fuels are used for heating houses and flats. One of the possible ways of limiting the number of used furnaces may be heating and powering of the housing estates and villages by specially designed combined heat and power (CHP) steam (or vapor) power plants. To be competitive to other heating technologies these systems should be cheap, reliable and easy to operate. Therefore, their design should be as simple as possible. Steam or organic Rankine cycle (ORC) energy conversion systems utilizing simple volumetric expanders, which can be applied for distributed power generation are meeting these conditions. The article presents literature review as well as selected thermodynamic and design issues concerning these systems. Literature review gave an outlook on the modeling, experiments, operating conditions and possible configurations of steam and ORC CHP systems. Then, model of the CHP system was implemented in computer software. Thanks to the positive technical features and ability to operate with wet gas the screw machine was selected as the system’s expander. Selected experimental data obtained from the literature review were used for system modeling. Especially the operating conditions of the selected expander (i.e., maximum mechanical power, maximum inlet pressure, expansion ratio and internal efficiency) were assumed based on the experimental results, technical data and information reported in different papers. Expander’s operating conditions and technical data (in particular the value of maximum working fluid pressure allowable at the inlet to the expander) were the basis for pre-selection of working fluids which are possible to apply in the modelled system and selection of the heat source thermal parameters. Modeling was proceeded for different conditions and the results show that depending on the operating conditions and applied working fluid electric power output of the CHP system ranges between 1570 and 2511 kWe (for heat source temperature of 200 °C) and between 1583 and 2631 kWe (for heat source temperature of 150 °C). However, not only maximum power output should be considered as the selection criteria of the system design and working fluid choice. The other important criteria are related to maximization of the obtained electric power, minimization of the vapor pressure at the outlet of the vapor generator and at the inlet to the expander, minimization of the working fluid flow, minimization of fuel consumption and maximization of the temperature of the working fluid at the outlet of the expander. The modeling results show that from all cases studied the ORC CHP power plant utilizing screw expander, using MD2M as working fluid and featuring the electric power of 1570 kWe fed by rapeseed oil is the best possible solution if technical assessment criteria are taken into consideration. Such a system can cover the heating demands of ca. 9615 flats.

ACS Style

Piotr Kolasiński. Application of volumetric expanders in small vapour power plants used in distributed energy generation – Selected design and thermodynamic issues. Energy Conversion and Management 2021, 231, 113859 .

AMA Style

Piotr Kolasiński. Application of volumetric expanders in small vapour power plants used in distributed energy generation – Selected design and thermodynamic issues. Energy Conversion and Management. 2021; 231 ():113859.

Chicago/Turabian Style

Piotr Kolasiński. 2021. "Application of volumetric expanders in small vapour power plants used in distributed energy generation – Selected design and thermodynamic issues." Energy Conversion and Management 231, no. : 113859.

Review
Published: 02 February 2021 in Energies
Reads 0
Downloads 0

Small and micro energy sources are becoming increasingly important in the current environmental conditions. Especially, the production of electricity and heat in so-called cogeneration systems allows for significant primary energy savings thanks to their high generation efficiency (up to 90%). This article provides an overview of the currently used and developed technologies applied in small and micro cogeneration systems i.e., Stirling engines, gas and steam microturbines, various types of volumetric expanders (vane, lobe, screw, piston, Wankel, gerotor) and fuel cells. Their basic features, power ranges and examples of implemented installations based on these technologies are presented in this paper.

ACS Style

Marcin Wołowicz; Piotr Kolasiński; Krzysztof Badyda. Modern Small and Microcogeneration Systems—A Review. Energies 2021, 14, 785 .

AMA Style

Marcin Wołowicz, Piotr Kolasiński, Krzysztof Badyda. Modern Small and Microcogeneration Systems—A Review. Energies. 2021; 14 (3):785.

Chicago/Turabian Style

Marcin Wołowicz; Piotr Kolasiński; Krzysztof Badyda. 2021. "Modern Small and Microcogeneration Systems—A Review." Energies 14, no. 3: 785.

Journal article
Published: 02 August 2020 in Energies
Reads 0
Downloads 0

Environmental issues are nowadays of great importance. In particular air and water quality should be kept at as high levels as possible. Energy conversion systems and devices which are applied for converting the chemical energy contained in different fuels into heat, electricity and cold in the industry and housing are sources of different gases and solid particle emissions. Medical data show PM2.5 dust in particular is highly dangerous for human health. Therefore, limiting the number of low-quality fuel combustion processes is a key issue of modern energy policy. Statistical data show that domestic heating systems account for a large share of the total emissions of PM2.5 and PM10 dust. For example in Poland in 2017, the share of households in the total annual emissions of PM2.5 dust was equal to ca. 35.8%, while the share of PM2.5 emission in industry (i.e., power generating plants, industrial power plants and technologies) was equal to only 23.6%. A possible way of solving this problem is by the successful replacement of old domestic furnaces by combined heat and power (CHP) or multigeneration boilers which can be used for heating the rooms and sanitary water and generating electricity and cold. Such systems can possibly contribute in the future to significant reductions of dust emissions and air pollution in urban and rural areas by limiting the number of low-quality fuel combustion processes. This article presents design considerations and experimental results related to a domestic micro-CHP unit which is based on organic Rankine cycle (ORC) technology. The main aim of the design works and experiments was therefore the analysis of the possibility of integrating the ORC system with a standard domestic central heating gas-fired boiler. The specially designed micro-ORC system was implemented in the laboratory and experiments were performed using this test stand. The main design aims of the test-stand were: low operating pressure, small working fluid flow, low price and compact dimensions. To meet these aims, volumetric machines were chosen as the expander and working fluid pump. The experimental results were positive and show that it is possible to integrate an ORC system with a standard domestic central heating gas boiler. For different heat source temperatures, the obtained expander power ranged from 109 W to 241 W and the thermodynamic cycle efficiency ranged from 4.3% to 8.8%. These positive research results were achieved partly thanks to the positive features of the different system subassemblies.

ACS Style

Piotr Kolasiński. Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating. Energies 2020, 13, 3983 .

AMA Style

Piotr Kolasiński. Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating. Energies. 2020; 13 (15):3983.

Chicago/Turabian Style

Piotr Kolasiński. 2020. "Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating." Energies 13, no. 15: 3983.

Journal article
Published: 04 June 2020 in Thermal Science and Engineering Progress
Reads 0
Downloads 0

Some of the heat sources (such as e.g. waste or renewable), are characterized by floating thermal and output characteristics. Thus, their application for powering vapour power plants, such as ORCs, which should utilize the heat sources having steady thermal and output characteristics is difficult. The floating heat source characteristics may potentially be improved using the heat storage devices providing the thermal energy accumulation at stable output and temperature level. Heat storage device can be adopted as a e.g. steady-level heat source for ORC system. In this paper different applications of the heat storage devices in ORCs were proposed and the results of experiments on powering the ORC system via heat storage device are presented. Moreover, the modelling of ORC system operating time for various types of the heat storage devices was carried out. The results showed that adopting the heat storage devices for powering the ORC systems is possible and it is a promising way of utilizing the waste and renewable heat sources featuring floating characteristics.

ACS Style

Piotr Kolasiński. Experimental and modelling studies on the possible application of heat storage devices for powering the ORC (organic rankine cycle) systems. Thermal Science and Engineering Progress 2020, 19, 100586 .

AMA Style

Piotr Kolasiński. Experimental and modelling studies on the possible application of heat storage devices for powering the ORC (organic rankine cycle) systems. Thermal Science and Engineering Progress. 2020; 19 ():100586.

Chicago/Turabian Style

Piotr Kolasiński. 2020. "Experimental and modelling studies on the possible application of heat storage devices for powering the ORC (organic rankine cycle) systems." Thermal Science and Engineering Progress 19, no. : 100586.

Journal article
Published: 24 January 2020 in Energies
Reads 0
Downloads 0

The working fluid selection is one of the most important issues faced when designing Organic Rankine Cycle (ORC) systems. The choice of working fluid is dictated by different criteria. The most important of them are safety of use, impact on the environment, and physical and chemical parameters. The type of ORC system in which the working fluid is to be used and the type of expander applied in this system is also affecting the working fluid selection. Nowadays, volumetric expanders are increasingly used in ORC systems. In the case of volumetric expanders, in addition to the aforementioned working fluid selection criteria, additional parameters are considered during the selecting of the working fluid, such as the range of operating pressures and geometric dimensions (determining the volume of working chambers) affecting the achieved power and efficiency of the expander. This article presents a method of selecting a working medium for ORC systems using volumetric expanders. This method is based on the dimensionless rating parameters applied for the comparative analysis of different working fluids. Dimensionless parameters were defined for selected thermal properties of the working fluids, namely thermal capacity, mean temperature of evaporation, mean temperature of condensation, pressure and volumetric expansion ratio, volumetric expandability, as well as the heat of preheating, vaporization, superheating, cooling, and liquefaction. Moreover, isentropic expansion work was considered as the rating parameter. In this article, in addition to the working fluid selection method, computational examples related to the selection of the working fluid for the ORC system fed by a heat source featuring specified temperatures are presented. The results of calculations of rating parameters and their comparison gave an outlook on the selection of appropriate working fluids.

ACS Style

Piotr Kolasiński. The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders. Energies 2020, 13, 573 .

AMA Style

Piotr Kolasiński. The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders. Energies. 2020; 13 (3):573.

Chicago/Turabian Style

Piotr Kolasiński. 2020. "The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders." Energies 13, no. 3: 573.

Conference paper
Published: 24 September 2019 in E3S Web of Conferences
Reads 0
Downloads 0

Some of the heat sources (such as e.g. waste or renewable), are characterized by floating thermal and output characteristics. Thus, their application for powering vapor power plants, such as ORCs, which should utilize the heat sources having steady thermal and output characteristics is difficult. The floating heat source characteristics may potentially be improved using the heat storage devices providing the thermal energy accumulation at stable output and temperature level. Heat storage device can be adopted as a e.g. steady-level heat source for ORC system. In this paper different applications of the heat storage devices in ORCs were proposed and the results of experiments on powering the ORC system via heat storage device are presented. The results showed that adopting the heat storage devices for powering the ORC systems is possible and it is a promising way of utilizing the waste and renewable heat sources featuring floating characteristics.

ACS Style

Piotr Kolasiński. Studies on the possible application of heat storage devices for powering the ORC (Organic Rankine Cycle) systems. E3S Web of Conferences 2019, 116, 00035 .

AMA Style

Piotr Kolasiński. Studies on the possible application of heat storage devices for powering the ORC (Organic Rankine Cycle) systems. E3S Web of Conferences. 2019; 116 ():00035.

Chicago/Turabian Style

Piotr Kolasiński. 2019. "Studies on the possible application of heat storage devices for powering the ORC (Organic Rankine Cycle) systems." E3S Web of Conferences 116, no. : 00035.

Journal article
Published: 02 August 2019 in Entropy
Reads 0
Downloads 0

One of the main challenges in the design and implementation of fluidized desiccant cooling (FDC) systems is increasing their low COP (coefficient of performance). Exergy analysis is one of the tools especially suitable for improvement and optimization of FDC systems. The improvement of performance is impossible as long as the main sources of exergy destruction are not identified and evaluated. In this paper, the exergy analysis was applied in order to identify these components and processes of the FDC system that are mainly responsible for exergy destruction. Moreover, the exergy efficiency of a simple fluidized desiccant cooler was determined. The results showed that fluidized beds and regenerative heat exchanger were the main exergy destruction sources with a 32% and 18% share of total exergy destruction, respectively. On the other hand, the direct evaporative cooler and air cooler placed after the desorbing fluidized bed were characterized by the lowest exergy efficiencies. This work contributes to better understanding of FDC operation principles and improvement of the performance of FDC technology.

ACS Style

Zbigniew Rogala; Piotr Kolasiński. Exergy Analysis of Fluidized Desiccant Cooling System. Entropy 2019, 21, 757 .

AMA Style

Zbigniew Rogala, Piotr Kolasiński. Exergy Analysis of Fluidized Desiccant Cooling System. Entropy. 2019; 21 (8):757.

Chicago/Turabian Style

Zbigniew Rogala; Piotr Kolasiński. 2019. "Exergy Analysis of Fluidized Desiccant Cooling System." Entropy 21, no. 8: 757.

Review
Published: 01 August 2019 in Energies
Reads 0
Downloads 0

This paper reviews the applications of the multi-vane expanders in ORC (organic Rankine cycle) systems. The operating principle and design of the ORC systems are addressed in the introduction. Then, there is a brief review of the expanders applied in small-power and micro-power ORCs, and a discussion of the multi-vane expander design and operating principle as an introduction to a comprehensive review on the applications of the multi-vane expanders in ORC systems. The different features of the multi-vane expanders—i.e., the design of the expander, its geometrical dimensions and operating conditions, durability, applied working fluid, obtained power output, and efficiency—are analyzed in this paper. This review clearly indicates that multi-vane expanders are a promising alternative to the different types of the expanders applied in ORC systems.

ACS Style

Piotr Kolasiński. Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities. Energies 2019, 12, 2975 .

AMA Style

Piotr Kolasiński. Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities. Energies. 2019; 12 (15):2975.

Chicago/Turabian Style

Piotr Kolasiński. 2019. "Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities." Energies 12, no. 15: 2975.

Journal article
Published: 19 June 2018 in Energies
Reads 0
Downloads 0

This paper concerns the issue of the proper selection of the operating parameters of the fluidised desiccant cooler. Despite the fact that fluidised desiccant cooling technology is being reported in the literature as an efficient way to provide cooling for the purposes of air-conditioning, the improper control of its operation can lead to a significantly worse performance than expected. The objective of the presented theoretical study is to provide guidelines on the proper selection of such operating parameters of a fluidized desiccant cooler, such as superficial air velocity, desiccant particle diameter, bed switching time, and desiccant filling height. The influence of the chosen operating parameters on the performance of fluidised desiccant cooling technology is investigated based on their impact on electric and thermal coefficients of performance (COP) and specific cooling power (SCP). Moreover, the influence of the outlet air temperature, humidity, and desiccant water uptake on the adsorption/desorption characteristics was investigated, contributing to better understanding of sorption processes.

ACS Style

Zbigniew Rogala; Piotr Kolasiński; Przemysław Błasiak. The Influence of Operating Parameters on Adsorption/Desorption Characteristics and Performance of the Fluidised Desiccant Cooler. Energies 2018, 11, 1597 .

AMA Style

Zbigniew Rogala, Piotr Kolasiński, Przemysław Błasiak. The Influence of Operating Parameters on Adsorption/Desorption Characteristics and Performance of the Fluidised Desiccant Cooler. Energies. 2018; 11 (6):1597.

Chicago/Turabian Style

Zbigniew Rogala; Piotr Kolasiński; Przemysław Błasiak. 2018. "The Influence of Operating Parameters on Adsorption/Desorption Characteristics and Performance of the Fluidised Desiccant Cooler." Energies 11, no. 6: 1597.

Journal article
Published: 11 April 2018 in Energies
Reads 0
Downloads 0

Micro-power domestic organic Rankine cycle (ORC) systems are nowadays of great interest. These systems are considered for combined heat and power (CHP) generation in domestic and distributed applications. The main issues of ORC systems design is selection of the expander and the working fluid. Thanks to their positive features, multi-vane expanders are especially promising for application in micro-power ORC systems. These expanders are very simple in design, small in dimensions, inexpensive and feature low gas flow capacity and expansion ratio. The application of multi-vane expanders in ORC systems is innovative and currently limited to prototype applications. However, a literature review indicates the growing interest in these machines and the potential for practical implementation. For this reason, it is necessary to conduct detailed studies on the multi-vane expanders operation in ORC systems. In this paper the results of experimental and numerical investigations on the influence of the applied working fluid and the arrangement of the steering edges on multi-vane expander performance in micro ORC system are reported. The experiments were performed using the specially designed lab test-stand, i.e. the domestic ORC system. Numerical simulations were proceeded in ANSYS CFX software (ANSYS, Inc., Canonsburg, PA, USA) and were focused on determining the expander performance under various flow conditions of different working fluids. Detailed numerical analysis of the arrangement of the machine steering edges showed existence of optimal mutual position of the inlet and outlet port for which the multi-vane expander achieves maximum internal work and internal efficiency.

ACS Style

Józef Rak; Przemysław Błasiak; Piotr Kolasiński. Influence of the Applied Working Fluid and the Arrangement of the Steering Edges on Multi-Vane Expander Performance in Micro ORC System. Energies 2018, 11, 892 .

AMA Style

Józef Rak, Przemysław Błasiak, Piotr Kolasiński. Influence of the Applied Working Fluid and the Arrangement of the Steering Edges on Multi-Vane Expander Performance in Micro ORC System. Energies. 2018; 11 (4):892.

Chicago/Turabian Style

Józef Rak; Przemysław Błasiak; Piotr Kolasiński. 2018. "Influence of the Applied Working Fluid and the Arrangement of the Steering Edges on Multi-Vane Expander Performance in Micro ORC System." Energies 11, no. 4: 892.

Journal article
Published: 01 April 2018 in Chemical Engineering Research and Design
Reads 0
Downloads 0

The experimental and numerical analysis of the standard fume hood features in order to determine the nature of the flow phenomena within the working chamber are presented and studied in the paper. The experiments were carried out for three characteristic heights of the vertical sliding sash, i.e., the lowest (closed), working and the highest (fully opened) heights. The air flow parameters such as: mass flow rate, local distribution of velocity at the exhaust plenum and inlet and pressure drop were measured and analyzed. Assuming isothermal, incompressible and turbulence flow of the air treated as ideal gas, the numerical model based on the continuity and momentum equations was proposed and solved using the Finite Volume Method (FVM). The numerical model was validated against the obtained experimental results. The goal of the numerical simulations was to investigate the flow structure and condition inside the fume hood for different heights of a vertical sliding sash. The obtained numerical results indicated the intensified air recirculation zones within the fume hood chamber and showed the complicated nature of the flow. The conclusions and fume hood design guidelines aimed at reducing the size of the recirculation zones and thus reducing the noise and power needed to drive the exhaust fan were determined. On the basis of the performed calculations four modifications of the fume hood design were proposed and numerically analyzed. Finally, the reduction of the recirculation zones therefore a decrease of pressure drop by 30.5 % was achieved.

ACS Style

Sławomir Pietrowicz; Piotr Kolasiński; Michał Pomorski. Experimental and numerical flow analysis and design optimization of a fume hood using the CFD method. Chemical Engineering Research and Design 2018, 132, 627 -643.

AMA Style

Sławomir Pietrowicz, Piotr Kolasiński, Michał Pomorski. Experimental and numerical flow analysis and design optimization of a fume hood using the CFD method. Chemical Engineering Research and Design. 2018; 132 ():627-643.

Chicago/Turabian Style

Sławomir Pietrowicz; Piotr Kolasiński; Michał Pomorski. 2018. "Experimental and numerical flow analysis and design optimization of a fume hood using the CFD method." Chemical Engineering Research and Design 132, no. : 627-643.

Journal article
Published: 01 December 2017 in Applied Thermal Engineering
Reads 0
Downloads 0
ACS Style

Zbigniew Rogala; Piotr Kolasiński; Zbigniew Gnutek. Modelling and experimental analyzes on air-fluidised silica gel-water adsorption and desorption. Applied Thermal Engineering 2017, 127, 950 -962.

AMA Style

Zbigniew Rogala, Piotr Kolasiński, Zbigniew Gnutek. Modelling and experimental analyzes on air-fluidised silica gel-water adsorption and desorption. Applied Thermal Engineering. 2017; 127 ():950-962.

Chicago/Turabian Style

Zbigniew Rogala; Piotr Kolasiński; Zbigniew Gnutek. 2017. "Modelling and experimental analyzes on air-fluidised silica gel-water adsorption and desorption." Applied Thermal Engineering 127, no. : 950-962.

Conference paper
Published: 07 November 2017 in E3S Web of Conferences
Reads 0
Downloads 0

Multi-vane expanders are positive displacement volumetric machines which are nowadays considered for application in micro-power domestic ORC systems as promising alternative to micro turbines and other volumetric expanders. The multi-vane expander features very simple design, low gas flow capacity, low expansion ratios, an advantageous ratio of the power output to the external dimensions and are insensitive to the negative influence of the gas-liquid mixture expansion. Moreover, the multi-vane expander can be easily hermetically sealed, which is one of the key issues in the ORC system design. A literature review indicates that issues concerning the application of multi-vane expanders in such systems, especially related to operating of multi-vane expander with different low-boiling working fluids, are innovative, not fully scientifically described and have the potential for practical implementation. In this paper the results of numerical investigations on multi-vane expander operating conditions are presented. The analyses were performed on three-dimensional numerical model of the expander in ANSYS CFX software. The numerical model of the expander was validated using the data obtained from the experiment carried out on a lab test-stand. Then a series of computational analysis were performed using expanders' numerical model in order to determine its operating conditions under various flow conditions of different working fluids.

ACS Style

Józef Rak; Przemysław Błasiak; Piotr Kolasiński. Numerical modelling of multi-vane expander operating conditions in ORC system. E3S Web of Conferences 2017, 22, 142 .

AMA Style

Józef Rak, Przemysław Błasiak, Piotr Kolasiński. Numerical modelling of multi-vane expander operating conditions in ORC system. E3S Web of Conferences. 2017; 22 ():142.

Chicago/Turabian Style

Józef Rak; Przemysław Błasiak; Piotr Kolasiński. 2017. "Numerical modelling of multi-vane expander operating conditions in ORC system." E3S Web of Conferences 22, no. : 142.

Conference paper
Published: 07 November 2017 in E3S Web of Conferences
Reads 0
Downloads 0

Fluidised desiccant cooling is reported in the literature as an efficient way to provide cooling for air-conditioning purposes. The performance of this technology can be described by electric and thermal Coefficients of Performance (COP) and Specific Cooling Power (SCP). In this paper comprehensive theoretical study was carried out in order to assess the effect of operating conditions such as: superficial air velocity, desiccant particle diameter, bed switching time and desiccant filling height on the performance of fluidised desiccant cooler (FDC). It was concluded that FDC should be filled with as small as possible desiccant particles featuring diameters and should not be operated with shorter switching times than optimum. Moreover in order to efficiently run such systems superficial air velocities during adsorption and desorption should be similar. At last substantial effect of desiccant filling height on performance of FDC was presented.

ACS Style

Zbigniew Rogala; Piotr Kolasiński; Zbigniew Gnutek. Effect of operating conditions on performance of silica gel-water air-fluidised desiccant cooler. E3S Web of Conferences 2017, 22, 146 .

AMA Style

Zbigniew Rogala, Piotr Kolasiński, Zbigniew Gnutek. Effect of operating conditions on performance of silica gel-water air-fluidised desiccant cooler. E3S Web of Conferences. 2017; 22 ():146.

Chicago/Turabian Style

Zbigniew Rogala; Piotr Kolasiński; Zbigniew Gnutek. 2017. "Effect of operating conditions on performance of silica gel-water air-fluidised desiccant cooler." E3S Web of Conferences 22, no. : 146.

Journal article
Published: 01 September 2017 in Energy Procedia
Reads 0
Downloads 0
ACS Style

Piotr Kolasiński; Przemysław Błasiak; Józef Rak. Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system. Energy Procedia 2017, 129, 323 -330.

AMA Style

Piotr Kolasiński, Przemysław Błasiak, Józef Rak. Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system. Energy Procedia. 2017; 129 ():323-330.

Chicago/Turabian Style

Piotr Kolasiński; Przemysław Błasiak; Józef Rak. 2017. "Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system." Energy Procedia 129, no. : 323-330.

Journal article
Published: 23 May 2017 in Applied Sciences
Reads 0
Downloads 0

Gas pressure reduction stations are commonly applied to decrease the pressure of natural gas in the transmission pipelines. In such stations, natural gas is expanded in throttling valves without producing any energy. Through the use of expander in natural gas pressure reduction stations, it is possible to recover the pressure energy of the natural gas during expansion, and drive the electrical generator. Possible solutions include turbines and volumetric expanders. However, turbines are complicated and expensive, while volumetric expanders are simple and cheap. This paper presents an analytical modeling of rolling piston expander work conditions when adopted to natural gas expansion. The main objective of this research was therefore a comprehensive analysis of influence of varied sizes of the expander components and natural gas thermal properties at the inlet and at the outlet of the expander, on the expander output power. The analysis presented in this paper indicates that the rolling piston expander is a good alternative to the turbines proposed for energy recovery in natural gas pressure reduction stations.

ACS Style

Piotr Kolasiński; Michał Pomorski; Przemysław Błasiak; Józef Rak. Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues. Applied Sciences 2017, 7, 535 .

AMA Style

Piotr Kolasiński, Michał Pomorski, Przemysław Błasiak, Józef Rak. Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues. Applied Sciences. 2017; 7 (6):535.

Chicago/Turabian Style

Piotr Kolasiński; Michał Pomorski; Przemysław Błasiak; Józef Rak. 2017. "Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues." Applied Sciences 7, no. 6: 535.

Journal article
Published: 01 August 2016 in Energies
Reads 0
Downloads 0

Micro (0.5–10 kW) organic Rankine cycle (ORC) power systems are nowadays considered for domestic power generation. Selection of a suitable expander is one of the most important problems connected with the domestic ORC system design. Volumetric machines or micro-turbines can be adopted as an expander in domestic ORC systems. Scroll and screw expanders are a common choice and were successfully applied in different small- and micro-power applications. However, micro-turbines as well as scroll and screw expanders are mechanically complicated and expensive. An alternative are rotary-vane machines, which are simple and cheap compared to micro-turbines. This paper documents a study providing the experimental and numerical analyses on the rotary vane expander operating conditions in a micro-ORC system. A test-stand was designed and set up and a series of experiments was performed using the test-stand. Results of these experiments were further used as an input to numerical simulations of an expander operation. In order to simulate the expander operating conditions, a three-dimensional numerical model has been prepared. The analysis presented in this paper indicates that a properly designed multi-vane expander is a cheap and mechanically simple alternative to other expansion devices proposed for domestic ORC systems.

ACS Style

Piotr Kolasiński; Przemysław Błasiak; Józef Rak. Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System. Energies 2016, 9, 606 .

AMA Style

Piotr Kolasiński, Przemysław Błasiak, Józef Rak. Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System. Energies. 2016; 9 (8):606.

Chicago/Turabian Style

Piotr Kolasiński; Przemysław Błasiak; Józef Rak. 2016. "Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System." Energies 9, no. 8: 606.

Review
Published: 17 June 2016 in Materials
Reads 0
Downloads 0

This paper reviews materials for thermoelectric waste heat recovery, and discusses selected industrial and distributed waste heat sources as well as recovery methods that are currently applied. Thermoelectric properties, especially electrical conductivity, thermopower, thermal conductivity and the thermoelectric figures of merit, are considered when evaluating thermoelectric materials for waste heat recovery. Alloys and oxides are briefly discussed as materials suitable for medium- and high-grade sources. Electroactive polymers are presented as a new group of materials for low-grade sources. Polyaniline is a particularly fitting polymer for these purposes. We also discuss types of modifiers and modification methods, and their influence on the thermoelectric performance of this class of polymers.

ACS Style

Ewa Kolasińska; Piotr Kolasiński. A Review on Electroactive Polymers for Waste Heat Recovery. Materials 2016, 9, 485 .

AMA Style

Ewa Kolasińska, Piotr Kolasiński. A Review on Electroactive Polymers for Waste Heat Recovery. Materials. 2016; 9 (6):485.

Chicago/Turabian Style

Ewa Kolasińska; Piotr Kolasiński. 2016. "A Review on Electroactive Polymers for Waste Heat Recovery." Materials 9, no. 6: 485.

Conference paper
Published: 01 February 2016 in IOP Conference Series: Materials Science and Engineering
Reads 0
Downloads 0

The effective waste heat recovery is one of the present-day challenges in the industry and power engineering. The energy systems dedicated for waste heat conversion into electricity are usually characterized by low efficiency and are complicated in the design. The possibility of waste heat recovery via thermoelectric materials may be an interesting alternative to the currently used technologies. In particular, due to their material characteristics, conducting polymers may be competitive when compared with the power machinery and equipment. These materials can be used in a wide range of the geometries e.g. the bulk products, thin films, pristine form or composites and the others. In this article, the authors present selected issues related to the mathematical and thermodynamic description of the heat transfer processes in the thermoelectric materials dedicated for the waste heat recovery. The link of these models with electrical properties of the material and a material solution based on a conducting polymer have also been presented in this paper.

ACS Style

Piotr Kolasinski; Ewa Kolasińska. Direct waste heat recovery via thermoelectric materials - chosen issues of the thermodynamic description. IOP Conference Series: Materials Science and Engineering 2016, 113, 012022 .

AMA Style

Piotr Kolasinski, Ewa Kolasińska. Direct waste heat recovery via thermoelectric materials - chosen issues of the thermodynamic description. IOP Conference Series: Materials Science and Engineering. 2016; 113 ():012022.

Chicago/Turabian Style

Piotr Kolasinski; Ewa Kolasińska. 2016. "Direct waste heat recovery via thermoelectric materials - chosen issues of the thermodynamic description." IOP Conference Series: Materials Science and Engineering 113, no. : 012022.