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1. An optimization model for economic feasibility analysis and design of decentralized waste-to-energy systems

Author:
Xiong, Jie; Ng, Tsan Sheng Adam; Wang, Shuming
Source:
Energy 2016 v.101 pp. 239-251
ISSN:
0360-5442
Subject:
case studies; economic feasibility; models; municipal solid waste; probability; waste treatment; Singapore
Abstract:
... This paper considers a methodology for economic feasibility analysis of a decentralized hybrid WTE (waste-to-energy) system, when input waste streams and technical parameters can be uncertain. A hybrid WTE system is decentralized when there are possibly different owners of the waste treatment units. A two-stage stochastic programming model is proposed to evaluate and optimize the joint probability ...
DOI:
10.1016/j.energy.2016.01.080

2. A study of double functions and load matching of a phosphoric acid fuel cell/heat-driven refrigerator hybrid system

Author:
Chen, Xiaohang; Wang, Yuan; Zhao, Yingru; Zhou, Yinghui
Source:
Energy 2016 v.101 pp. 359-365
ISSN:
0360-5442
Subject:
fuel cells; fuels; models; phosphoric acid; refrigeration; refrigerators; temperature
Abstract:
... A generic model of the hybrid system consisting of a phosphoric acid fuel cell (PAFC) and a heat-driven refrigerator is originally established. On the basis of the models of PAFCs and three-heat-source refrigerators, the equivalent power output and efficiency of the hybrid system are obtained. The performance characteristic curves of the hybrid system are plotted through numerical calculation, sho ...
DOI:
10.1016/j.energy.2016.02.029

3. Combustion study of a spark-ignition engine from pressure cycles

Author:
Djouadi, Amel; Bentahar, Fatiha
Source:
Energy 2016 v.101 pp. 211-217
ISSN:
0360-5442
Subject:
burning; combustion; fuels; gases; heat; hydrogen; methane; models; spark ignition engines; specific heat; temperature
Abstract:
... This work presents investigations on combustion analysis of an experimental spark-ignition engine fueled specially by a mixture of 15% in volume of hydrogen and 85% in volume of methane with an equivalence ratio of 0.67 at 100% load, corresponding to optimum conditions for SI engine, using two models, zero dimensional model based on Rassweiller & Withrow theory and first law-single zone either at ...
DOI:
10.1016/j.energy.2016.02.013

4. Determination of the current–voltage characteristics of concentrator systems by using different adapted conventional techniques

Author:
Almonacid, Florencia; Rodrigo, Pedro; Fernández, Eduardo F.
Source:
Energy 2016 v.101 pp. 146-160
ISSN:
0360-5442
Subject:
energy; light intensity; models; monitoring; power plants; prediction; temperature
Abstract:
... The modelling of the current–voltage characteristics of HCPV (high concentrator photovoltaic) modules is fundamental for the design, monitoring and energy prediction of HCPV systems and power plants. However, the modelling of these devices is inherently different and more complex than that of conventional PV (photovoltaic) modules. Because of this, considerable efforts have been done to develop mo ...
DOI:
10.1016/j.energy.2016.01.082

5. DPHX (dew point evaporative heat exchanger): System design and performance analysis

Author:
Ham, Sang-Woo; Jeong, Jae-Weon
Source:
Energy 2016 v.101 pp. 132-145
ISSN:
0360-5442
Subject:
air; air temperature; coolers; dehumidification; dewpoint; energy; heat exchangers; models; summer; systems engineering; wastes
Abstract:
... The main purpose of this study is to propose a new type of DP-IEC (dew point evaporative cooler), a DPHX (dew point evaporative heat exchanger). A DP-IEC, known as regenerative evaporative cooler or M-cycle indirect evaporative cooler, has drawn great attention from researchers because it can theoretically cool the air to its dew point temperature, thereby overcoming the high SAT (supply air tempe ...
DOI:
10.1016/j.energy.2016.02.019

6. Estimating the hedging value of an energy exchange in Turkey to a retail power consumer

Author:
Kurucak, Abdurrahman; Shcherbakova, Anastasia
Source:
Energy 2016 v.101 pp. 16-26
ISSN:
0360-5442
Subject:
electricity; energy transfer; markets; models; prices; retail marketing; risk; Turkey (country)
Abstract:
... The new Electricity Market Law of Turkey, enacted in March 2013, built the legal framework needed to establish a long discussed energy exchange in Turkish electricity markets. The aim of this study is to estimate the value of this prospective energy exchange.We do this by first developing a spot price model and a link between spot and forward markets. We then use the resulting price series to comp ...
DOI:
10.1016/j.energy.2016.02.005

7. Finding a representative network losses model for large-scale transmission expansion planning with renewable energy sources

Author:
Fitiwi, Desta Z.; Olmos, L.; Rivier, M.; de Cuadra, F.; Pérez-Arriaga, I.J.
Source:
Energy 2016 v.101 pp. 343-358
ISSN:
0360-5442
Subject:
algorithms; case studies; models; planning; renewable energy sources; uncertainty
Abstract:
... The global drive for integration of RESs (renewable energy sources) means that TEP (transmission expansion planning) has to be carried out over geographically wide and large-scale networks under high levels of uncertainty. This leads to complex combinatorial TEP optimization problems, requiring a huge amount of OPF (optimal power flow) computations. The algorithm employed to calculate the OPF must ...
DOI:
10.1016/j.energy.2016.02.015

8. Flexibility mechanisms and pathways to a highly renewable US electricity future

Author:
Frew, Bethany A.; Becker, Sarah; Dvorak, Michael J.; Andresen, Gorm B.; Jacobson, Mark Z.
Source:
Energy 2016 v.101 pp. 65-78
ISSN:
0360-5442
Subject:
cost effectiveness; electric vehicles; electricity; linear programming; models; planning; prices; renewable electricity; renewable energy sources; California
Abstract:
... This study explores various scenarios and flexibility mechanisms to integrate high penetrations of renewable energy into the US (United States) power grid. A linear programming model – POWER (Power system Optimization With diverse Energy Resources) – is constructed and used to (1) quantify flexibility cost-benefits of geographic aggregation, renewable overgeneration, storage, and flexible electric ...
DOI:
10.1016/j.energy.2016.01.079

9. Heat transfer and entropy generation in a microchannel with longitudinal vortex generators using nanofluids

Author:
Ebrahimi, Amin; Rikhtegar, Farhad; Sabaghan, Amin; Roohi, Ehsan
Source:
Energy 2016 v.101 pp. 190-201
ISSN:
0360-5442
Subject:
aluminum oxide; cupric oxide; entropy; heat transfer; model validation; models; nanofluids; nanoparticles; particle size
Abstract:
... Conjugated heat transfer and hydraulic performance for nanofluid flow in a rectangular microchannel heat sink with LVGs (longitudinal vortex generators) are numerically investigated using at different ranges of Reynolds numbers. Three-dimensional simulations are performed on a microchannel heated by a constant heat flux with a hydraulic diameter of 160 μm and six pairs of LVGs using a single-phase ...
DOI:
10.1016/j.energy.2016.01.102

10. Hybrid diagnosis to characterise the energy and environmental enhancement of photovoltaic modules using smart materials

Author:
Royo, Patricia; Ferreira, Víctor J.; López-Sabirón, Ana M.; Ferreira, Germán
Source:
Energy 2016 v.101 pp. 174-189
ISSN:
0360-5442
Subject:
computer software; electricity; energy efficiency; environmental assessment; environmental enrichment; environmental impact; latent heat; life cycle assessment; manufacturing; mineral resources; models; phase transition; solar collectors; solar energy; sustainable technology; systems engineering; temperature
Abstract:
... Growing demands for energy, gradual depletion of fossil resources and high environmental impacts require that current energy production models be replaced by more sustainable technology. Thus, research efforts focused on improving energy efficiency and material efficiency are considered extremely relevant.In the following work, the influence of incorporating PCMs (phase change materials) on electr ...
DOI:
10.1016/j.energy.2016.01.101

11. Investigation on the dynamic characteristics of the counter-current flow for liquid desiccant dehumidification

Author:
Lu, Hao; Lu, Lin; Luo, Yimo; Qi, Ronghui
Source:
Energy 2016 v.101 pp. 229-238
ISSN:
0360-5442
Subject:
absorption; air flow; dehumidification; desiccants; liquids; models; prediction; turbulent flow
Abstract:
... The dynamic characteristics of solution film flow with counter-current air flow, especially the two phase contact area, are important for the optimal design and operation of LDD (liquid desiccant dehumidifier). However, the unsteady interfacial information, including the interfacial pressure, velocity and film thickness, is hardly to be examined accurately by theoretical prediction or experimental ...
DOI:
10.1016/j.energy.2016.02.023

12. Least cost, utility scale abatement from Australia's NEM (National Electricity Market). Part 1: Problem formulation and modelling

Author:
Jeppesen, M.; Brear, M.J.; Chattopadhyay, D.; Manzie, C.; Dargaville, R.; Alpcan, T.
Source:
Energy 2016 v.101 pp. 606-620
ISSN:
0360-5442
Subject:
carbon; electricity; greenhouse gas emissions; greenhouse gases; issues and policy; markets; meteorological data; models; planning; prices; solar energy; wind; wind power; Australia
Abstract:
... This paper is the first of a two part study that considers long term, least cost, GHG (greenhouse gas) abatement pathways for an electricity system. Part 1 formulates a planning model to optimise these pathways and presents results for a single reference scenario. Part 2 applies this model to different scenarios and considers the policy implications.The planning model formulated has several constr ...
DOI:
10.1016/j.energy.2016.02.017

13. Least cost, utility scale abatement from Australia's NEM (National Electricity Market). Part 2: Scenarios and policy implications

Author:
Brear, M.J.; Jeppesen, M.; Chattopadhyay, D.; Manzie, C.; Alpcan, T.; Dargaville, R.
Source:
Energy 2016 v.101 pp. 621-628
ISSN:
0360-5442
Subject:
carbon sequestration; discount rate; electricity; energy costs; greenhouse gases; issues and policy; markets; models; nonrenewable resources; nuclear power; power generation; Australia
Abstract:
... This paper is the second of a two part study that considers least cost, greenhouse gas abatement pathways for an electricity system. Part 1 of this study formulated a model for determining these abatement pathways, and applied this model to Australia's NEM (National Electricity Market) for a single reference scenario. Part 2 of this study applies this model to different scenarios and considers the ...
DOI:
10.1016/j.energy.2016.02.020

14. Reduction of pulverized coal boiler's emissions through ReEngineered Feedstock™ co-combustion

Author:
Vekemans, Odile; Laviolette, Jean-Philippe; Chaouki, Jamal
Source:
Energy 2016 v.101 pp. 471-483
ISSN:
0360-5442
Subject:
air; coal; combustion; emissions; furnaces; hydrochloric acid; mixing; models; nitrogen oxides; polychlorinated biphenyls; sorbents; sulfur; sulfur dioxide; temperature; wastes
Abstract:
... This paper presents an experimental study of ReEF™ co-firing with coal in a pilot-scale PCB (pulverized coal boiler). ReEF™, or ReEngineered Feedstock™, is a novel fuel composed of both waste and alkaline sorbent, combining therefore the PCB emission control techniques of waste derived fuel co-firing and that of sorbent blending. The results show that ReEF™ co-firing resulted in a higher sorbent u ...
DOI:
10.1016/j.energy.2016.01.105

15. Stochastic techno-economic assessment based on Monte Carlo simulation and the Response Surface Methodology: The case of an innovative linear Fresnel CSP (concentrated solar power) system

Author:
Bendato, Ilaria; Cassettari, Lucia; Mosca, Marco; Mosca, Roberto
Source:
Energy 2016 v.101 pp. 309-324
ISSN:
0360-5442
Subject:
Monte Carlo method; costs and returns; economic performance; income; models; power plants; profitability; response surface methodology; solar energy
Abstract:
... Combining technological solutions with investment profitability is a critical aspect in designing both traditional and innovative renewable power plants. Often, the introduction of new advanced-design solutions, although technically interesting, does not generate adequate revenue to justify their utilization. In this study, an innovative methodology is developed that aims to satisfy both targets. ...
DOI:
10.1016/j.energy.2016.02.048

16. Synthesis of heat exchanger network considering pressure drop and layout of equipment exchanging heat

Author:
Souza, Rachitha D; Khanam, Shabina; Mohanty, Bikash
Source:
Energy 2016 v.101 pp. 484-495
ISSN:
0360-5442
Subject:
case studies; economic investment; heat exchangers; linear programming; models; pipelines; topology
Abstract:
... The present work is related to development of a MINLP (Mixed integer non linear programming) model for the synthesis of HEN (heat exchanger network) considering pressure drop through connecting pipelines, heat exchangers and the layout of the equipment exchanging heat simultaneously. The pressure drop of shell and tube sides in a heat exchanger is considered in the model. Further, detailed plant l ...
DOI:
10.1016/j.energy.2016.02.040

17. The “cost of not doing” energy planning: The Spanish energy bubble

Author:
Gómez, Antonio; Dopazo, César; Fueyo, Norberto
Source:
Energy 2016 v.101 pp. 434-446
ISSN:
0360-5442
Subject:
bubbles; economic sustainability; energy; energy policy; models; planning; power generation; power plants; tariffs; uncertainty
Abstract:
... The Spanish power generation sector is facing dire problems: generation overcapacity, various tariff hikes over recent years, uncertainty over the financial viability of many power plants and a regulatory framework that lacks stability. This situation is the consequence of both poor energy policies and the economic crisis in the late 2000s and early 2010s. In this paper we analyze the following th ...
DOI:
10.1016/j.energy.2016.02.004

18. The value of stochastic programming in day-ahead and intra-day generation unit commitment

Author:
Schulze, Tim; McKinnon, Ken
Source:
Energy 2016 v.101 pp. 592-605
ISSN:
0360-5442
Subject:
decision support systems; models; renewable energy sources; stochastic processes; uncertainty; wind
Abstract:
... The recent expansion of renewable energy supplies has prompted the development of a variety of efficient stochastic optimization models and solution techniques for hydro-thermal scheduling. However, little has been published about the added value of stochastic models over deterministic ones. In the context of day-ahead and intra-day unit commitment under wind uncertainty, we compare two-stage and ...
DOI:
10.1016/j.energy.2016.01.090

19. Validation of cell voltage and water content in a PEM (polymer electrolyte membrane) fuel cell model using neutron imaging for different operating conditions

Author:
Salva, J. Antonio; Iranzo, Alfredo; Rosa, Felipe; Tapia, Elvira
Source:
Energy 2016 v.101 pp. 100-112
ISSN:
0360-5442
Subject:
cathodes; electric power; electrochemistry; electrolytes; fuel cells; heat transfer; hydrogen; image analysis; mass transfer; models; neutrons; oxygen; physical phenomena; polymers; radiography; relative humidity; stoichiometry; temperature; water content
Abstract:
... This work presents a one dimensional analytical model developed for a 50 cm² PEM (polymer electrolyte membrane) fuel cell with five-channel serpentine flow field. The different coupled physical phenomena such as electrochemistry, mass transfer of hydrogen, oxygen and water (two phases) together with heat transfer have been solved simultaneously. The innovation of this work is that the model has be ...
DOI:
10.1016/j.energy.2016.02.006

20. Virtual generation tribe based robust collaborative consensus algorithm for dynamic generation command dispatch optimization of smart grid

Author:
Zhang, Xiaoshun; Yu, Tao; Yang, Bo; Li, Li
Source:
Energy 2016 v.101 pp. 34-51
ISSN:
0360-5442
Subject:
algorithms; electrical equipment; models; topology
Abstract:
... This paper proposes a decentralized collaborative control framework of autonomous VGT (virtual generation tribe) for smart grid. A VGT-CCA (VGT based collaborative consensus algorithm) is firstly developed to solve the dynamic GCD (generation command dispatch) optimization of the AGC (automatic generation control) under an ideal communication network. Then a novel CCA VGT-RCCA (VGT based robust CC ...
DOI:
10.1016/j.energy.2016.02.009