The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform

Hao Liu - One of the best experts on this subject based on the ideXlab platform.

  • a biomass fired micro scale chp system with organic rankine Cycle orc thermodynamic modelling studies
    Biomass & Bioenergy, 2011
    Co-Authors: Hao Liu, Yingjua Shao
    Abstract:

    Abstract This paper presents the results of thermodynamics modelling studies of a 2 kW (e) biomass-fired CHP system with organic Rankine Cycle (ORC). Three environmentally friendly refrigerants, namely HFE7000, HFE7100 and n-pentane, have been selected as the ORC fluids. The thermodynamic properties of the selected ORC fluids which have been predicted by commercial software (EES) are used to predict the thermal Efficiency of ORC. The results of modelling show that under the simulated conditions (1) the ORC thermal Efficiency with any selected ORC fluid is well below (roughly about 60% of) the Carnot Cycle Efficiency; the ORC Efficiency depends on not only the modelling conditions but also the ORC fluid – the highest predicted ORC Efficiency is 16.6%; the predicted ORC Efficiency follows the following order: n-pentane > HFE7000 > HFE7100 (2) both superheating and sub-cooling are detrimental to the ORC Efficiency (3) the electrical Efficiency of the CHP system with the selected ORC fluids is predicted to be within the range of 7.5%–13.5%, mainly depending on the hot water temperature of the biomass boiler and the ORC condenser cooling water temperature as well as the ORC fluid, and corresponding to about 1.5 kW and 2.71 kW electricity output (4) the overall CHP Efficiency of the CHP system is in the order of 80% for all three ORC fluids although the amount and quality of heating supplied by the CHP system depend on the ORC fluid selected and the modelling conditions.

  • A biomass-fired micro-scale CHP system with organic Rankine Cycle (ORC) – Thermodynamic modelling studies
    Biomass and Bioenergy, 2011
    Co-Authors: Hao Liu, Shao Yingjuan
    Abstract:

    Abstract This paper presents the results of thermodynamics modelling studies of a 2 kW (e) biomass-fired CHP system with organic Rankine Cycle (ORC). Three environmentally friendly refrigerants, namely HFE7000, HFE7100 and n-pentane, have been selected as the ORC fluids. The thermodynamic properties of the selected ORC fluids which have been predicted by commercial software (EES) are used to predict the thermal Efficiency of ORC. The results of modelling show that under the simulated conditions (1) the ORC thermal Efficiency with any selected ORC fluid is well below (roughly about 60% of) the Carnot Cycle Efficiency; the ORC Efficiency depends on not only the modelling conditions but also the ORC fluid – the highest predicted ORC Efficiency is 16.6%; the predicted ORC Efficiency follows the following order: n-pentane > HFE7000 > HFE7100 (2) both superheating and sub-cooling are detrimental to the ORC Efficiency (3) the electrical Efficiency of the CHP system with the selected ORC fluids is predicted to be within the range of 7.5%–13.5%, mainly depending on the hot water temperature of the biomass boiler and the ORC condenser cooling water temperature as well as the ORC fluid, and corresponding to about 1.5 kW and 2.71 kW electricity output (4) the overall CHP Efficiency of the CHP system is in the order of 80% for all three ORC fluids although the amount and quality of heating supplied by the CHP system depend on the ORC fluid selected and the modelling conditions.

Yingjua Shao - One of the best experts on this subject based on the ideXlab platform.

  • a biomass fired micro scale chp system with organic rankine Cycle orc thermodynamic modelling studies
    Biomass & Bioenergy, 2011
    Co-Authors: Hao Liu, Yingjua Shao
    Abstract:

    Abstract This paper presents the results of thermodynamics modelling studies of a 2 kW (e) biomass-fired CHP system with organic Rankine Cycle (ORC). Three environmentally friendly refrigerants, namely HFE7000, HFE7100 and n-pentane, have been selected as the ORC fluids. The thermodynamic properties of the selected ORC fluids which have been predicted by commercial software (EES) are used to predict the thermal Efficiency of ORC. The results of modelling show that under the simulated conditions (1) the ORC thermal Efficiency with any selected ORC fluid is well below (roughly about 60% of) the Carnot Cycle Efficiency; the ORC Efficiency depends on not only the modelling conditions but also the ORC fluid – the highest predicted ORC Efficiency is 16.6%; the predicted ORC Efficiency follows the following order: n-pentane > HFE7000 > HFE7100 (2) both superheating and sub-cooling are detrimental to the ORC Efficiency (3) the electrical Efficiency of the CHP system with the selected ORC fluids is predicted to be within the range of 7.5%–13.5%, mainly depending on the hot water temperature of the biomass boiler and the ORC condenser cooling water temperature as well as the ORC fluid, and corresponding to about 1.5 kW and 2.71 kW electricity output (4) the overall CHP Efficiency of the CHP system is in the order of 80% for all three ORC fluids although the amount and quality of heating supplied by the CHP system depend on the ORC fluid selected and the modelling conditions.

Shao Yingjuan - One of the best experts on this subject based on the ideXlab platform.

  • A biomass-fired micro-scale CHP system with organic Rankine Cycle (ORC) – Thermodynamic modelling studies
    Biomass and Bioenergy, 2011
    Co-Authors: Hao Liu, Shao Yingjuan
    Abstract:

    Abstract This paper presents the results of thermodynamics modelling studies of a 2 kW (e) biomass-fired CHP system with organic Rankine Cycle (ORC). Three environmentally friendly refrigerants, namely HFE7000, HFE7100 and n-pentane, have been selected as the ORC fluids. The thermodynamic properties of the selected ORC fluids which have been predicted by commercial software (EES) are used to predict the thermal Efficiency of ORC. The results of modelling show that under the simulated conditions (1) the ORC thermal Efficiency with any selected ORC fluid is well below (roughly about 60% of) the Carnot Cycle Efficiency; the ORC Efficiency depends on not only the modelling conditions but also the ORC fluid – the highest predicted ORC Efficiency is 16.6%; the predicted ORC Efficiency follows the following order: n-pentane > HFE7000 > HFE7100 (2) both superheating and sub-cooling are detrimental to the ORC Efficiency (3) the electrical Efficiency of the CHP system with the selected ORC fluids is predicted to be within the range of 7.5%–13.5%, mainly depending on the hot water temperature of the biomass boiler and the ORC condenser cooling water temperature as well as the ORC fluid, and corresponding to about 1.5 kW and 2.71 kW electricity output (4) the overall CHP Efficiency of the CHP system is in the order of 80% for all three ORC fluids although the amount and quality of heating supplied by the CHP system depend on the ORC fluid selected and the modelling conditions.

Apostolos Pesyridis - One of the best experts on this subject based on the ideXlab platform.

  • Review of Organic Rankine Cycle experimental data trends
    Energy Conversion and Management, 2018
    Co-Authors: Byung Sik Park, Muhammad Usman, Muhammad Imran, Apostolos Pesyridis
    Abstract:

    Abstract Organic Rankine Cycle (ORC)-based systems are being extensively investigated for heat-to-electric power conversion from various sources, such as biomass, waste heat recovery, concentrated solar thermal and geothermal. The ORC technology has a promising future as it helps to meet energy requirements, arguably with a minimal environmental impact. This work summarizes the current state-of-the-art of actual i.e., experimental ORC system performance, derived from a comprehensive analysis of the most significant, relevant and up-to-date experimental data published in scientific literature. A survey of more than 200 scientific works is scrutinized according to specific selection criteria and data is extracted to develop a database containing thermodynamic Cycle information along with component-level performance information. Performance trends are discussed and addressed as functions of first principles. One of the least surprising results indicate that the performance follows economies of scale. More revealing is the fact that the Organic Rankine Cycle conversion Efficiency (mechanical to electrical) was around 70%. Furthermore, it becomes clear that there is a large gap between research and development for source and sink temperature differences above 150 °C. In general, the overall heat to electrical power conversion Efficiency was around 44% of the Carnot Cycle Efficiency of the Cycle. A host of other relevant thermodynamic parameters are cross-compared, as well as compared to theoretical results, allowing a level of practical ORC system design target homologation to be achieved which is useful for the engineer as well as the scientist in the design of ORC components, systems as well as advanced Cycles.

Byung Sik Park - One of the best experts on this subject based on the ideXlab platform.

  • Review of Organic Rankine Cycle experimental data trends
    Energy Conversion and Management, 2018
    Co-Authors: Byung Sik Park, Muhammad Usman, Muhammad Imran, Apostolos Pesyridis
    Abstract:

    Abstract Organic Rankine Cycle (ORC)-based systems are being extensively investigated for heat-to-electric power conversion from various sources, such as biomass, waste heat recovery, concentrated solar thermal and geothermal. The ORC technology has a promising future as it helps to meet energy requirements, arguably with a minimal environmental impact. This work summarizes the current state-of-the-art of actual i.e., experimental ORC system performance, derived from a comprehensive analysis of the most significant, relevant and up-to-date experimental data published in scientific literature. A survey of more than 200 scientific works is scrutinized according to specific selection criteria and data is extracted to develop a database containing thermodynamic Cycle information along with component-level performance information. Performance trends are discussed and addressed as functions of first principles. One of the least surprising results indicate that the performance follows economies of scale. More revealing is the fact that the Organic Rankine Cycle conversion Efficiency (mechanical to electrical) was around 70%. Furthermore, it becomes clear that there is a large gap between research and development for source and sink temperature differences above 150 °C. In general, the overall heat to electrical power conversion Efficiency was around 44% of the Carnot Cycle Efficiency of the Cycle. A host of other relevant thermodynamic parameters are cross-compared, as well as compared to theoretical results, allowing a level of practical ORC system design target homologation to be achieved which is useful for the engineer as well as the scientist in the design of ORC components, systems as well as advanced Cycles.