452 results found
Acha S, Mariaud A, Shah N, et al., 2018, Optimal design and operation of distributed low-carbon energy technologies in commercial buildings, ENERGY, Vol: 142, Pages: 578-591, ISSN: 0360-5442
Al-Ansari T, Govindan R, Korre A, et al., 2018, An energy, water and food nexus approach aiming to enhance food production systems through CO2 fertilization, Editors: Friedl, Klemes, Radl, Varbanov, Wallek, Publisher: ELSEVIER SCIENCE BV, Pages: 1487-1492
Ballantyne AD, Hallett JP, Riley DJ, et al., 2018, Lead acid battery recycling for the twenty-first century, ROYAL SOCIETY OPEN SCIENCE, Vol: 5, ISSN: 2054-5703
Bieber N, Kee JH, Wang X, et al., 2018, Sustainable planning of the energy-water-food nexus using decision making tools (vol 113, pg 584, 2018), ENERGY POLICY, Vol: 116, Pages: 289-289, ISSN: 0301-4215
Bieber N, Ker JH, Wang X, et al., 2018, Sustainable planning of the energy-water-food nexus using decision making tools, ENERGY POLICY, Vol: 113, Pages: 584-607, ISSN: 0301-4215
Chen W, Sharifzadeh M, Shah N, et al., 2018, Iterative peptide synthesis in membrane cascades: Untangling operational decisions, COMPUTERS & CHEMICAL ENGINEERING, Vol: 115, Pages: 275-285, ISSN: 0098-1354
Georgiou S, Acha S, Shah N, et al., 2018, A generic tool for quantifying the energy requirements of glasshouse food production, JOURNAL OF CLEANER PRODUCTION, Vol: 191, Pages: 384-399, ISSN: 0959-6526
Georgiou S, Shah N, Markides CN, 2018, A thermo-economic analysis and comparison of pumped-thermal and liquid-air electricity storage systems, Applied Energy, Vol: 226, Pages: 1119-1133, ISSN: 0306-2619
© 2018 The Authors Efficient and affordable electricity storage systems have a significant potential to support the growth and increasing penetration of intermittent renewable-energy generation into the grid from an energy system planning and management perspective, while differences in the demand and price of peak and off-peak electricity can make its storage of economic interest. Technical (e.g., roundtrip efficiency, energy and power capacity) as well as economic (e.g., capital, operating and maintenance costs) indicators are anticipated to have a significant combined impact on the competitiveness of any electricity storage technology or system under consideration and, ultimately, will crucially determine their uptake and implementation. In this paper, we present thermo-economic models of two recently proposed medium- to large-scale electricity storage systems, namely ‘Pumped-Thermal Electricity Storage’ (PTES) and ‘Liquid-Air Energy Storage’ (LAES), focusing on system efficiency and costs. The LAES thermodynamic model is validated against data from an operational pilot plant in the UK; no such equivalent PTES plant exists, although one is currently under construction. As common with most newly proposed technologies, the absence of cost data results to the economic analysis and comparison being a significant challenge. Therefore, a costing effort for the two electricity storage systems that includes multiple costing approaches based on the module costing technique is presented, with the overriding aim of conducting a preliminary economic feasibility assessment and comparison of the two systems. Based on the results, it appears that PTES has the potential to achieve higher roundtrip efficiencies, although this remains to be demonstrated. LAES performance is found to be significantly enhanced through the integration and utilisation of waste heat (and cold) streams. In terms of economics on the other hand, and at the system size intended
Govindan R, Al-Ansari T, Korre A, et al., 2018, Assessment of technology portfolios with enhanced economic and environmental performance for the energy, water and food nexus, Editors: Friedl, Klemes, Radl, Varbanov, Wallek, Publisher: ELSEVIER SCIENCE BV, Pages: 537-542
Heuberger CF, Rubin ES, Staffell L, et al., 2018, Power capacity expansion planning considering endogenous technology cost learning (vol 204, pg 831, 2017), APPLIED ENERGY, Vol: 220, Pages: 974-974, ISSN: 0306-2619
Heuberger CF, Staffell I, Shah N, et al., 2018, Impact of myopic decision-making and disruptive events in power systems planning, NATURE ENERGY, Vol: 3, Pages: 634-640, ISSN: 2058-7546
Iruretagoyena D, Sunny N, del Rio-Chanona EA, et al., 2018, Towards a low carbon economy via sorptionenhanced water gas shift and alcohol reforming, Computer Aided Chemical Engineering, Pages: 1729-1734
© 2018 Elsevier B.V. Hydrogen (H2) is one of the most important raw materials in the chemical and refinery industries. H2is also regarded as a future “energy vector” due to its potential to act as an ultraclean fuel in the heat, power, and transport sectors. Therefore, development of efficient, low carbon routes to produce H2is essential to meet its current and growing demand. In particular, this has placed an imperative on improving the efficiency of steam reforming of hydrocarbons (SRH), this process being considered the most feasible and economic route to large scale H2production. The water gas shift reaction (WGS) is one of the most important stages of SRH, but is equilibrium limited and requires improvements in energy efficiency. In this study, we demonstrate that the overall efficiency of the WGS can be improved by removing CO2in situ and co-feeding alcohols such as methanol and ethanol. The feasibility of this novel concept is investigated by conducting thermodynamic analyses of the alcohol reforming/WGS (alcohol-to-shift) reactions for H2production alone and with simultaneous CO2adsorption (sorption-enhanced, SEalcohol-to-shift). To this end, a non-stoichiometric approach based on the minimisation of the Gibbs free energy is used. The results show that adding alcohols to the feed facilitates autothermal operation of the shift unit and significantly increases the amount of H2produced. The H2productivity can be further enhanced by adsorbing CO2in situ. The theoretical studies presented here are carried out under relevant operating conditions for SRH and aim to serve as a guideline for future work on alcohol-to-shift processes enhanced by adsorption.
Jing R, Zhu X, Zhu Z, et al., 2018, A multi-objective optimization and multi-criteria evaluation integrated framework for distributed energy system optimal planning, ENERGY CONVERSION AND MANAGEMENT, Vol: 166, Pages: 445-462, ISSN: 0196-8904
O'Dwyer E, Wang H, Wang A-J, et al., 2018, Optimisation of Wastewater Treatment and Recovery Solutions in Industrial Parks, Editors: Friedl, Klemes, Radl, Varbanov, Wallek, Publisher: ELSEVIER SCIENCE BV, Pages: 1407-1412
Pantaleo AM, Camporeale SM, Sorrentino A, et al., 2018, Hybrid solar-biomass combined Brayton/organic Rankine-cycle plants integrated with thermal storage: Techno-economic feasibility in selected Mediterranean areas, Renewable Energy, ISSN: 0960-1481
© 2018 The Authors This paper presents a thermodynamic analysis and techno-economic assessment of a novel hybrid solar-biomass power-generation system configuration composed of an externally fired gas-turbine (EFGT) fuelled by biomass (wood chips) and a bottoming organic Rankine cycle (ORC) plant. The main novelty is related to the heat recovery from the exhaust gases of the EFGT via thermal energy storage (TES), and integration of heat from a parabolic-trough collectors (PTCs) field with molten salts as a heat-transfer fluid (HTF). The presence of a TES between the topping and bottoming cycles facilitates the flexible operation of the system, allows the system to compensate for solar energy input fluctuations, and increases capacity factor and dispatchability. A TES with two molten salt tanks (one cold at 200 °C and one hot at 370 °C) is chosen. The selected bottoming ORC is a superheated recuperative cycle suitable for heat conversion in the operating temperature range of the TES. The whole system is modelled by means of a Python-based software code, and three locations in the Mediterranean area are assumed in order to perform energy-yield analyses: Marseille in France, Priolo Gargallo in Italy and Rabat in Morocco. In each case, the thermal storage that minimizes the levelized cost of energy (LCE) is selected on the basis of the estimated solar radiation and CSP size. The results of the thermodynamic simulations, capital and operational costs assessments and subsidies (feed-in tariffs for biomass and solar electricity available in the Italian framework), allow estimating the global energy conversion efficiency and the investment profitability in the three locations. Sensitivity analyses of the biomass costs, size of PTCs, feed-in tariff and share of cogenerated heat delivered to the load are also performed. The results show that the high investment costs of the CSP section in the proposed size range and hybridization configuration allow investment pr
Panteli A, Giarola S, Shah N, 2018, Supply Chain Mixed Integer Linear Program Model Integrating a Biorefining Technology Superstructure, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 57, Pages: 9849-9865, ISSN: 0888-5885
Quek VC, Shah N, Chachuat B, 2018, Modeling for design and operation of high-pressure membrane contactors in natural gas sweetening, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 132, Pages: 1005-1019, ISSN: 0263-8762
Thaore V, Chadwick D, Shah N, 2018, Sustainable production of chemical intermediates for nylon manufacture: A techno-economic analysis for renewable production of caprolactone, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 135, Pages: 140-152, ISSN: 0263-8762
Triantafyllidis CP, Koppelaar RHEM, Wang X, et al., 2018, An integrated optimisation platform for sustainable resource and infrastructure planning, ENVIRONMENTAL MODELLING & SOFTWARE, Vol: 101, Pages: 146-168, ISSN: 1364-8152
Wang X, Guo M, Koppelaar RHEM, et al., 2018, A Nexus Approach for Sustainable Urban Energy-Water-Waste Systems Planning and Operation, ENVIRONMENTAL SCIENCE & TECHNOLOGY, Vol: 52, Pages: 3257-3266, ISSN: 0013-936X
Wang X, Kong Q, Papathanasiou MM, et al., 2018, Precision healthcare supply chain design through multi-objective stochastic programming, Computer Aided Chemical Engineering, Pages: 2137-2142
© 2018 Elsevier B.V. Following the FDA's historic approval of the first cell-based, autologous, cancer therapy in 2017, there has been an increasing growth in the personalized cell therapy market. Both the personalized character as well as the sensitive nature of these therapies, has increased the complexity of their supply chain design and optimisation. In this work, we have addressed key issues in the cyclic supply chain for simultaneous design of the supply chain and the manufacturing plan. A comprehensive optimisation based methodology through both deterministic and stochastic programming is presented and applied to study the Chimeric Antigen Receptor (CAR) T cell therapies. Multiple objectives including maximisation of the overall net present value (NPV) and minimisation of the average response time of all patients are evaluated, while accounting the uncertainties in patients’ demand distribution. Results indicate that the total benefits from the optimized supply chain management are significant compared with the current global market.
Wang X, Li L, Palazoglu A, et al., 2018, Optimization and control of offshore wind systems with energy storage, Energy Conversion and Management, Vol: 173, Pages: 426-437, ISSN: 0196-8904
© 2018 Elsevier Ltd Wind energy is widely exploited as a promising renewable energy source worldwide. In this article, an optimization method for the control and operation of the offshore wind farm as an integrated system considering its operational, economic and environmental impacts is proposed. The state of the offshore wind farm development, and the challenges faced by the offshore wind farms, including the challenges of economic costs, operational reliability, and environmental impacts are reviewed and summarized. A systematic methodology is proposed to optimize the costs of an offshore wind farm system based on a framework that extends from the supervisory level dispatch strategies to individual pitch control for load reduction and fatigue mitigation. This holistic approach is able to improve the efficiency and economic performance of a wind farm through overall system optimization, while explicitly operating each wind turbine using a formally designed control framework leading to an extension of their service lifespan. This work provides thorough introduction and innovative solutions for many economic and environmental issues in offshore wind farm development and has strong application potential.
Zhang D, del Rio-Chanona EA, Shah N, 2018, Life cycle assessments for biomass derived sustainable biopolymer & energy co-generation, Sustainable Production and Consumption, Vol: 15, Pages: 109-118
© 2018 Institution of Chemical Engineers Sustainable polymers derived from biomass have been considered as promising candidates to reduce the dependency on fossil based polymers. In this study, a conceptual process design was conducted for citrus waste derived biopolymer production with energy co-generation, and its eco-friendliness was evaluated through life cycle assessment by comparison against a petroleum derived polymer production process. Based on the current research, two original conclusions were proposed. The first one is that energy-efficient separation techniques are of critical importance for the design of eco-friendly chemical processes. Only focusing on the use of sustainable feedstocks with high conversion reactions cannot guarantee an environmentally-friendly final product. The second one is that biomass should be considered not only as a raw material, but more importantly, as an energy source for the sustainable synthesis of biochemicals. In other words, a sustainable process should be designed such that a portion of biomass is used to provide clean energy for process operation, with the rest converted for product generation.
Zhang D, del Rio-Chanona EA, Shah N, 2018, Life cycle assessment of bio-based sustainable polylimonene carbonate production processes, Computer Aided Chemical Engineering, Pages: 1693-1698
© 2018 Elsevier B.V. Biomass derived polymers are considered as promising candidates to replace petroleum based polymers due to their potential environmental friendliness. To facilitate their application, in this study, a newly proposed biopolymer, polylimonene carbonate, was chosen as the representative to investigate the environmental impacts of the biopolymer production process. Different feedstocks (citrus waste and microalgae) were selected and a comprehensive process design from limonene oxidation to polymer synthesis was completed. Through life cycle assessment, effects of biomass treatment methods, energy integration, and use of solvents on the process environmental impacts were thoroughly discussed. It was found that for sustainable polylimonene carbonate synthesis, a more environmentally-friendly and energy-efficient limonene oxidation method should be developed. Based on the economic analysis, the polymer's cost was estimated to be around 1.36 to 1.51 $/kg, indicating its great potential as a substitute for petrol-based polystyrene. Moreover, this study found that both feedstock selection and biowaste treatment method significantly affect the process environmental impacts, and a carbon negative biopolymer can be achieved when the remaining waste is used for energy generation. Therefore, a new concept that considers CO2as an efficient solar energy carrier for future sustainable process design is proposed in this study.
Zhang D, del Rio-Chanona EA, Wagner JL, et al., 2018, Life cycle assessments of bio-based sustainable polylimonene carbonate production processes, Sustainable Production and Consumption, Vol: 14, Pages: 152-160
© 2018 Institution of Chemical Engineers Biomass is a promising feedstock for the production of sustainable biopolymers, which could offer a significant reduction of the adverse environmental impacts associated with conventional petroleum-based polymers. To further evaluate their potential, this study investigated the environmental impacts associated with the production of the newly proposed biopolymer polylimonene carbonate. Different feedstocks (citrus waste and microalgae) were selected and a conceptual process design from limonene oxidation to polymer synthesis was completed. Using life cycle assessment, the potential for energy integration and the contributions of individual process sections on the overall process environmental impacts were thoroughly analysed. The results showed, that sustainable polylimonene carbonate synthesis was limited by the use of tert-butyl hydroperoxide as the limonene oxidation agent and consequently, a more environmentally-friendly and energy-efficient limonene oxidation method should be developed. Based on the economic analysis, the polymer cost was estimated to range from $1.36 to $1.51 kg−1, comparable to the costs of petrol-based polystyrene ($1.2 to $1.6 kg−1). Moreover, this study found that both feedstock selection and the biowaste treatment method have significant effects on the process environmental impacts, and a carbon negative process was achieved when applying the waste biomass for electricity generation. Therefore, it was concluded that future process designs should combine polymer production with the co-generation of energy from waste biomass.
Zheng X, Wu G, Qiu Y, et al., 2018, A MINLP multi-objective optimization model for operational planning of a case study CCHP system in urban China, APPLIED ENERGY, Vol: 210, Pages: 1126-1140, ISSN: 0306-2619
del Rio-Chanona EA, Liu J, Wagner JL, et al., 2018, Dynamic modeling of green algae cultivation in a photobioreactor for sustainable biodiesel production, BIOTECHNOLOGY AND BIOENGINEERING, Vol: 115, Pages: 359-370, ISSN: 0006-3592
del Rio-Chanona EA, Zhang D, Shah N, 2018, Sustainable biopolymer synthesis via superstructure and multiobjective optimization, AICHE JOURNAL, Vol: 64, Pages: 91-103, ISSN: 0001-1541
Acha S, Mariaud A, Shah N, et al., 2017, Optimal design and operation of low-carbon energy technologies in commercial buildings
© 2017 CURRAN-CONFERENCE. All rights reserved. Non-domestic buildings are large energy consumers and present many opportunities with which to enhance the way they produce and consume electricity, heating and cooling. If energy system integration is feasible, this can lead to significant reductions in energy use and emissions associated with building operations. Due to their diverse energy requirements, a broad range of technologies in flexible solutions need to be evaluated to identify the best alternative. This paper presents an integrated energy-systems model that optimizes the selection and operation of distributed technologies for commercial buildings. The framework consists of a comprehensive technology database, half-hourly electricity cost profiles, conventional fuel costs and building features. This data is applied to a mixed-integer linear programming model that optimizes the design and operation of installed technologies based on a range of financial and environmental criteria. The model aims to guide decision makers in making attractive investments that are technically feasible and environmentally sound. A case study of a food distribution centre in the UK is presented to illustrate the economic and environmental benefits the proposed integrated energy systems model could bring against a business as usual (BaU) approach. The technology portfolio considered in the case study includes combined heat and power (CHP) and organic Rankine cycle (ORC) engines, absorption chillers, photovoltaic (PV) panels, and battery systems. The results clearly illustrate the different outcomes and trade-offs that can emerge when stakeholders champion different technologies instead of making an exhaustive assessment. Overall, the model provides meaningful insights that can allow stakeholders to make well informed investment decisions when it comes to the optimal configuration and operation of energy technologies in commercial buildings.
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