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Robin Smith - One of the best experts on this subject based on the ideXlab platform.
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Evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon J. PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.In this work, waste heat is defined and a methodology developed to identify the potential for waste heat recovery in Process sites; considering the temperature and quantity of waste heat sources from the site Processes and the site utility system (including fired heaters and, the cogeneration, cooling and refrigeration systems). The concept of the energy Efficiency of a site is introduced - the fraction of the energy inputs that is converted into useful energy (heat or power or cooling) to support the methodology. Furthermore, simplified mathematical models of waste heat recovery technologies using heat as primary energy source, including organic Rankine cycles (using both pure and mixed organics as working fluids), absorption chillers and absorption heat pumps are developed to support the methodology. These models are applied to assess the potential for recovery of useful energy from waste heat.The methodology is illustrated for an existing Process site using a case study of a petroleum refinery. The energy Efficiency of the site increases by 10% as a result of waste heat recovery. If there is an infinite demand for recovered energy (i.e. all the recoverable waste heat sources are exploited), the site energy Efficiency could increase by 33%. The methodology also shows that combining technologies into a system creates greater potential to exploit the available waste heat in Process sites.
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evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.
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retrofit strategy for the site wide mitigation of co2 emissions in the Process industries
Chemical Engineering Research & Design, 2015Co-Authors: Mona Gharaie, Megan Jobson, Hassan M Panjeshahi, Jin Kuk Kim, Robin SmithAbstract:Abstract The combustion of fossil fuels for providing heat and power in the Process industries is a major contributor of CO2 emissions. Heat integration methods have been widely used for energy-saving retrofit projects to improve the energy Efficiency of Process plants, reducing fuel consumed and consequently CO2 emissions. It is not straightforward to identify the most appropriate strategy for CO2 emissions reduction, as a wide range of options are available, including fuel switching, reducing energy demand through Efficiency improvements, retrofit of heat exchanger networks, etc. The economic impact and design constraints of each option need to be considered. A systematic approach is presented to allow evaluation of trade-offs between the cost of emissions reduction options and the effect on overall CO2 emissions. The approach applies a hierarchical conceptual design procedure. The proposed procedure is applied to a case study to demonstrate how an economic retrofit solution to reducing site-wide CO2 emissions can be systematically developed and evaluated.
Megan Jobson - One of the best experts on this subject based on the ideXlab platform.
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Evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon J. PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.In this work, waste heat is defined and a methodology developed to identify the potential for waste heat recovery in Process sites; considering the temperature and quantity of waste heat sources from the site Processes and the site utility system (including fired heaters and, the cogeneration, cooling and refrigeration systems). The concept of the energy Efficiency of a site is introduced - the fraction of the energy inputs that is converted into useful energy (heat or power or cooling) to support the methodology. Furthermore, simplified mathematical models of waste heat recovery technologies using heat as primary energy source, including organic Rankine cycles (using both pure and mixed organics as working fluids), absorption chillers and absorption heat pumps are developed to support the methodology. These models are applied to assess the potential for recovery of useful energy from waste heat.The methodology is illustrated for an existing Process site using a case study of a petroleum refinery. The energy Efficiency of the site increases by 10% as a result of waste heat recovery. If there is an infinite demand for recovered energy (i.e. all the recoverable waste heat sources are exploited), the site energy Efficiency could increase by 33%. The methodology also shows that combining technologies into a system creates greater potential to exploit the available waste heat in Process sites.
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evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.
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retrofit strategy for the site wide mitigation of co2 emissions in the Process industries
Chemical Engineering Research & Design, 2015Co-Authors: Mona Gharaie, Megan Jobson, Hassan M Panjeshahi, Jin Kuk Kim, Robin SmithAbstract:Abstract The combustion of fossil fuels for providing heat and power in the Process industries is a major contributor of CO2 emissions. Heat integration methods have been widely used for energy-saving retrofit projects to improve the energy Efficiency of Process plants, reducing fuel consumed and consequently CO2 emissions. It is not straightforward to identify the most appropriate strategy for CO2 emissions reduction, as a wide range of options are available, including fuel switching, reducing energy demand through Efficiency improvements, retrofit of heat exchanger networks, etc. The economic impact and design constraints of each option need to be considered. A systematic approach is presented to allow evaluation of trade-offs between the cost of emissions reduction options and the effect on overall CO2 emissions. The approach applies a hierarchical conceptual design procedure. The proposed procedure is applied to a case study to demonstrate how an economic retrofit solution to reducing site-wide CO2 emissions can be systematically developed and evaluated.
Gbemi Oluleye - One of the best experts on this subject based on the ideXlab platform.
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Evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon J. PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.In this work, waste heat is defined and a methodology developed to identify the potential for waste heat recovery in Process sites; considering the temperature and quantity of waste heat sources from the site Processes and the site utility system (including fired heaters and, the cogeneration, cooling and refrigeration systems). The concept of the energy Efficiency of a site is introduced - the fraction of the energy inputs that is converted into useful energy (heat or power or cooling) to support the methodology. Furthermore, simplified mathematical models of waste heat recovery technologies using heat as primary energy source, including organic Rankine cycles (using both pure and mixed organics as working fluids), absorption chillers and absorption heat pumps are developed to support the methodology. These models are applied to assess the potential for recovery of useful energy from waste heat.The methodology is illustrated for an existing Process site using a case study of a petroleum refinery. The energy Efficiency of the site increases by 10% as a result of waste heat recovery. If there is an infinite demand for recovered energy (i.e. all the recoverable waste heat sources are exploited), the site energy Efficiency could increase by 33%. The methodology also shows that combining technologies into a system creates greater potential to exploit the available waste heat in Process sites.
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evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.
Simon Perry - One of the best experts on this subject based on the ideXlab platform.
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evaluating the potential of Process sites for waste heat recovery
Applied Energy, 2016Co-Authors: Gbemi Oluleye, Megan Jobson, Robin Smith, Simon PerryAbstract:As a result of depleting reserves of fossil fuels, conventional energy sources are becoming less available. In spite of this, energy is still being wasted, especially in the form of heat. The energy Efficiency of Process sites (defined as useful energy output per unit of energy input) may be increased through waste heat utilisation, thereby resulting in primary energy savings.
Icier Filiz - One of the best experts on this subject based on the ideXlab platform.
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Quality characteristics of pomegranate juice concentrates produced by ohmic heating assisted vacuum evaporation
'Wiley', 2019Co-Authors: Sabanci Serdal, Cevik Mutlu, Cokgezme, Omer F., Yildiz Hasan, Icier FilizAbstract:WOS: 000459322700059PubMed ID: 30411365BACKGROUND Vacuum evaporation (VE) Process is widely utilized in fruit juice evaporation to preserve quality attributes of final product. However, it has some disadvantages such as possible degradation of aroma components or volatile fatty acids due to long Process time, and low energy Efficiency of Process. Pomegranate juice having 17.5% total soluble solid (TSS) content was evaporated to 40% TSS by ohmic heating assisted vacuum evaporation (OVE; 7.5, 10 and 12.5 V cm(-1)) and VE in the present study. The effects of the evaporation methods on pH, titratable acidity and colour values, antioxidant activity (AA), total monomeric anthocyanin (TMA), total phenolic content (TPC), hydroxymethylfurfural (HMF) and invert sugar content of pomegranate juice concentrates were compared. RESULTS The colour properties, TMA, TPC and AA values of pomegranate juice concentrates evaporated by OVE were more influenced than those evaporated by VE. The degradation of sugars was minimized for OVE Processes at high voltage gradients (10 and 12.5 V cm(-1)), and HMF content of pomegranate juice concentrated by OVE was lower than VE. CONCLUSION It is thought that electrochemical reactions occurred because of the use of titanium electrodes during the OVE Process caused these quality changes in pomegranate juice concentrates having high acidity. Hence, it was concluded that the utilization of relatively more electrochemically inert electrodes should be investigated in further studies to better evaluate the of influence of OVE method on quality attributes of different fruit juices. (c) 2018 Society of Chemical IndustryTUBITAK ProjectTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114O117]This study was part of the TUBITAK Project No. 114O117 'Setting up and testing of ohmic heating assisted evaporation system, and investigation of its applicability on the concentration of pomegranate juice'. The authors acknowledge the TUBITAK TOVAG Group and the Certurkler Machine Company
