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1. Numerical investigation into the effect of nonlinear spring on the adaptation of an oscillating foil for energy extraction

Author:
Jiang, W.; Wang, Y.L.; Zhang, D.; Xie, Y.H.
Source:
Renewable energy 2018 v.117 pp. 12-21
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; foil; generators (equipment);     Show all 4 Subjects
Abstract:
... A new type of fully passive power generator based on oscillating foil is proposed and numerically tested. The shedding vortexes drive the foil to pitch around the pitching center, and the resulting periodic lift force drives the foil to swing around an arm. Nonlinear spring is utilized to improve the adaptation and energy extraction performance of the power generator. Two-dimensional Navier-Stokes ...
DOI:
10.1016/j.renene.2017.10.008

2. Hierarchical coordination of TSO-DSO economic dispatch considering large-scale integration of distributed energy resources

Author:
Yuan, Zhao; Hesamzadeh, Mohammad Reza
Source:
Applied energy 2017 v.195 pp. 600-615
ISSN:
0306-2619
Subject:
energy; energy resources,   etc   ; models;     Show all 3 Subject
Abstract:
... This paper proposes a hierarchical coordination mechanism for coordinating the economic dispatch of transmission system operator (TSO) and distribution system operator (DSO). The challenge of dispatching large-scale distributed energy resources (DERs) is addressed. The coordination problem of dispatching energy and reserve is formulated. Benders decomposition is the underlying mathematical foundat ...
DOI:
10.1016/j.apenergy.2017.03.042

3. Implications for the energy policy derived from the relation between the cultural dimensions of Hofstede's model and the consumption of renewable energies

Author:
Pelau, Corina; Pop, Nicolae Al.
Source:
Energy policy 2018 v.118 pp. 9-168
ISSN:
0301-4215
Subject:
energy; energy policy,   etc   ; European Union; models; motivation; natural resources; Europe;     Show all 7 Subjects
Abstract:
... This paper aims to determine the relation between national culture and the consumption of renewable energies in several European countries. According to the Renewable Energy Directive of the European Commission, there have been set common goals for the share of consumption of renewable energies in the European Union, but each country is responsible for the action plan to achieve these targets. The ...
DOI:
10.1016/j.enpol.2018.03.042

4. Why are rented dwellings less energy-efficient? Evidence from a representative sample of the U.S. housing stock

Author:
Souza, M.N.M.
Source:
Energy policy 2018 v.118 pp. 11-159
ISSN:
0301-4215
Subject:
energy costs; energy efficiency,   etc   ; homeowners; markets; residential housing; United States;     Show all 6 Subjects
Abstract:
... This paper compares energy-efficient appliance adoption rates across U.S. residential markets. The focus is to explore variation across tenure modes (rented or owner-occupied residences). Bivariate probits are used to correct for endogenous determination of tenure mode and energy efficiency outcomes. Results suggest that, when compared to renters, homeowners are significantly more likely to have e ...
DOI:
10.1016/j.enpol.2018.03.013

5. A comprehensive model of a cavity receiver to achieve uniform heat flux using air-carbon particles mixture

Author:
Jin, Yabin; Fang, Jiabin; Wei, Jinjia; Wang, Xinhe
Source:
Applied energy 2018 v.220 pp. 13-628
ISSN:
0306-2619
Subject:
energy; solar energy,   etc   ; absorption; carbon; equations; heat transfer; models; temperature;     Show all 8 Subjects
Abstract:
... A non-uniform solar flux leads to a non-uniform temperature distribution on the walls of cavity receiver. There exists a large temperature gradient, which can cause great challenges for the safety and high-efficiency operation of concentrating solar power system (CSP). To overcome this problem, micron particles with strong properties of absorption, scatter and radiation are added into the cavity r ...
DOI:
10.1016/j.apenergy.2018.03.142

6. On the use of risk-based Shapley values for cost sharing in interplant heat integration programs

Author:
Jin, Yuhui; Chang, Chuei-Tin; Li, Shaojun; Jiang, Da
Source:
Applied energy 2018 v.211 pp. 17-920
ISSN:
0306-2619
Subject:
energy conservation; energy costs,   etc   ; heat exchangers; heat recovery; models;     Show all 5 Subjects
Abstract:
... The heat exchanger network (HEN) is traditionally used for optimal heat recovery in a single chemical plant, while the multi-plant counterparts have been studied in recent years primarily for the purpose of reaping additional overall energy savings. Since all these works focused primarily upon minimization of the total energy cost, the resulting interplant heat integration arrangements were often ...
DOI:
10.1016/j.apenergy.2017.11.097

7. Effect of rectangular hot water tank position and aspect ratio on thermal stratification enhancement

Author:
Kurşun, Burak; Ökten, Korhan
Source:
Renewable energy 2018 v.116 pp. 639-646
ISSN:
0960-1481
Subject:
renewable energy sources; thermal energy,   etc   ; tanks; temperature profiles; water storage;     Show all 5 Subjects
Abstract:
... Thermal stratification is an important factor increasing the efficiency of hot water storage tanks used for thermal energy storage. In this study, the effects of the position of a rectangular hot water tank and the aspect ratio on the thermal stratification were investigated numerically. In this direction, a numerical analysis was carried out for the different angle of the water tank with the hori ...
DOI:
10.1016/j.renene.2017.10.013

8. Parametric study of the small scale linear Fresnel reflector

Author:
Barbón, A.; Barbón, N.; Bayón, L.; Sánchez-Rodríguez, J.A.
Source:
Renewable energy 2018 v.116 pp. 64-74
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; latitude; mathematical models; shade;     Show all 5 Subjects
Abstract:
... This paper addresses the influence of the transversal and longitudinal parameters in the performance of a small scale linear Fresnel reflector (SSLFR) without longitudinal movement. The main purpose of this study is to show the influence of the design parameters (receiver height, mirror length, and mirror width) on the energy absorbed by the absorber tube. In addition, the influence of these param ...
DOI:
10.1016/j.renene.2017.09.066

9. Research on environmental efficiency and TFP of Beijing areas under the constraint of energy-saving and emission reduction

Author:
Wen, Jiashuai; Wang, Haiyan; Chen, Feixiang; Yu, Ruonan
Source:
Ecological indicators 2018 v.84 pp. 235-243
ISSN:
1470-160X
Subject:
energy; energy conservation,   etc   ; momentum; pollution; urban areas; China;     Show all 6 Subjects
Abstract:
... In recent years, economy grows rapidly in China but it also pays a huge cost of destroy of resources and environment, and energy-saving and emission reduction has become a hot topic. This paper aims at calculating the environmental efficiency and environmental total factor productivity (TFP) of Beijing under the constraint of energy-saving and emission reduction to explore the relationship of the ...
DOI:
10.1016/j.ecolind.2017.08.069

10. Graphene surface-polariton in-plane Cherenkov radiation

Author:
Tao, Jin; Wu, Lin; Zheng, Guoxing
Source:
Carbon 2018 v.133 pp. 5-253
ISSN:
0008-6223
Subject:
energy,   etc   ; electrons; graphene; photons; wavelengths;     Show all 5 Subjects
Abstract:
... The Cherenkov plasmonic radiation in/parallel graphene plane is demonstrated theoretically. It is shown that the graphene Cherenkov radiation can be excited by a moving electron at a relative lower speed, which greatly reduces the difficulty for the Cherenkov radiation realization due to the low phase velocity and high field confinement of graphene plasmons. The excited graphene plasmons wavelengt ...
DOI:
10.1016/j.carbon.2018.03.027

11. Tunable quantum interference in bilayer graphene in double-resonant Raman scattering

Author:
Herziger, Felix; Tyborski, Christoph; Ochedowski, Oliver; Schleberger, Marika; Maultzsch, Janina
Source:
Carbon 2018 v.133 pp. 6-259
ISSN:
0008-6223
Subject:
energy,   etc   ; Raman spectroscopy; graphene; lasers;     Show all 4 Subjects
Abstract:
... The line shape of the double-resonant 2D Raman mode in bilayer graphene is often considered to be characteristic for a certain laser excitation energy. Here, in a joint experimental and theoretical study, we analyze the dependence of the double-resonant Raman scattering processes in bilayer graphene on the electronic broadening parameter γ. We demonstrate that the ratio between symmetric and anti- ...
DOI:
10.1016/j.carbon.2018.03.026

12. Eccentricity optimization of a horizontal shell-and-tube latent-heat thermal energy storage unit based on melting and melting-solidifying performance

Author:
Zheng, Zhang-Jing; Xu, Yang; Li, Ming-Jia
Source:
Applied energy 2018 v.220 pp. 8-454
ISSN:
0306-2619
Subject:
thermal energy,   etc   ; heat; melting; models;     Show all 4 Subjects
Abstract:
... As for a horizontal single-pass shell-and-tube latent-heat thermal energy storage unit (LTESU), the eccentricity between inner and outer tube is designed to improve the melting and melting-solidifying performances. A fixed-grid numerical method with enthalpy-double-porosities model is proposed to accurately predict the melting or solidifying characteristics of LTESUs with different eccentricities. ...
DOI:
10.1016/j.apenergy.2018.03.126

13. Energy harvesting properties of a flapping wing with an adaptive Gurney flap

Author:
Zhu, Bing; Huang, Yun; Zhang, Yongming
Source:
Energy 2018 v.152 pp. 10-128
ISSN:
0360-5442
Subject:
energy,   etc   ; foil; harvesting; mathematical models;     Show all 4 Subjects
Abstract:
... Flapping wing structures have drawn increasing attention for harvesting energy from flowing fluids. This work proposes the application of an adaptive Gurney flap to the trailing end of a flapping wing foil, which actively adjusts the position of a single Gurney flap to be consistently employed on the foil pressure side. The transient two-dimensional numerical simulations are conducted to compare t ...
DOI:
10.1016/j.energy.2018.03.142

14. Failure probability estimation of gas supply using the central moment method in an integrated energy system

Author:
Fu, Xueqian; Zhang, Xiurong
Source:
Applied energy 2018 v.219 pp. 10-10
ISSN:
0306-2619
Subject:
energy,   etc   ; algorithms; natural gas; uncertainty;     Show all 4 Subjects
Abstract:
... The reliable supply of natural gas ensures the safe and stable operation of an integrated energy system. Operational uncertainty of the integrated energy system (IES) such as a surge in heating load can exacerbate an unreliable supply situation of natural gas. This paper examines gas supply reliability. A central moment method is proposed to estimate the failure probabilities for the gas supply in ...
DOI:
10.1016/j.apenergy.2018.03.038

15. Residential versus communal combination of photovoltaic and battery in smart energy systems

Author:
Marczinkowski, Hannah Mareike; Østergaard, Poul Alberg
Source:
Energy 2018 v.152 pp. 10-475
ISSN:
0360-5442
Subject:
energy,   etc   ; batteries; electricity; simulation models;     Show all 4 Subjects
Abstract:
... This paper presents an analysis of small consumers’ involvement in smart island energy systems with a focus on the technical feasibility of photovoltaic (PV) systems in combination with batteries. Two approaches may be observed in the literature: the optimisation on a household level with the aim of being self-reliant versus coordinated and collective technologies with increased integration across ...
DOI:
10.1016/j.energy.2018.03.153

16. Hydrodynamic responses and efficiency analyses of a heaving-buoy wave energy converter with PTO damping in regular and irregular waves

Author:
Zang, Zhipeng; Zhang, Qinghe; Qi, Yue; Fu, Xiaoying
Source:
Renewable energy 2018 v.116 pp. 527-542
ISSN:
0960-1481
Subject:
energy conversion,   etc   ; hydrodynamics; water power;     Show all 3 Subjects
Abstract:
... Experimental investigation on the power performance of a heaving-buoy wave energy converter (WEC) with power take-off (PTO) damping was conducted under regular and irregular waves. The effects of the main influential parameters, including the incident wave height, wave frequency and PTO damping, on the maximum heave displacement, phase difference between the buoy velocity and wave elevation, and c ...
DOI:
10.1016/j.renene.2017.09.057

17. Estimation of daily and monthly diffuse radiation from measurements of global solar radiation a case study across China

Author:
Wang, Hong; Sun, Fubao; Wang, Tingting; Liu, Wenbin
Source:
Renewable energy 2018 v.126 pp. 16-241
ISSN:
0960-1481
Subject:
energy; energy conservation; renewable energy sources,   etc   ; case studies; engineering; income; solar radiation; China;     Show all 8 Subjects
Abstract:
... With increasing demand for energy, broaden renewable energy of income and reduce expenditure is becoming more and more important. Diffuse radiation (Rd) is an important consideration in building energy saving. Hundreds of methods were developed to calculate Rd because it is seldom available in many countries and its spatial-pattern is strongly station-dependent. There are only 13 stations that mon ...
DOI:
10.1016/j.renene.2018.03.029

18. Numerical and empirical evaluation of a novel building integrated collector storage solar water heater

Author:
Garnier, Celine; Muneer, Tariq; Currie, John
Source:
Renewable energy 2018 v.126 pp. 15-295
ISSN:
0960-1481
Subject:
energy; energy requirements; renewable energy sources,   etc   ; fluid mechanics; geometry; heat transfer; heaters; prototypes; solar collectors; temperature;     Show all 10 Subjects
Abstract:
... Integrated collector storage is a long established simple low cost solar water heater configuration combining the solar collector with a storage tank into a single unit. Previous studies have shown the potential of integrated collector storage solar water heaters to significantly reduce domestic energy requirements for water heating, however challenges still remain to integrate them in roof/façade ...
DOI:
10.1016/j.renene.2018.03.041

19. Simulation method for a pit seasonal thermal energy storage system with a heat pump in a district heating system

Author:
Sorknæs, Peter
Source:
Energy 2018 v.152 pp. 6-538
ISSN:
0360-5442
Subject:
energy industry; renewable energy sources; thermal energy,   etc   ; heat pumps; simulation models; temperature;     Show all 6 Subjects
Abstract:
... To better facilitate renewable energy systems, the district heating sector is currently changing towards lower temperatures and increased cross-sectoral integration. Seasonal thermal energy storage systems alongside heat pumps have received an increasing attention. However, the operation of a seasonal thermal energy storage system alongside a heat pump is more complex than a short-term thermal ene ...
DOI:
10.1016/j.energy.2018.03.152

20. Experimental testing of cooling internal loads with a radiant wall

Author:
Romaní, Joaquim; Cabeza, Luisa F.; Pérez, Gabriel; Pisello, Anna Laura; de Gracia, Alvaro
Source:
Renewable energy 2018 v.116 pp. 1-8
ISSN:
0960-1481
Subject:
energy; energy conservation; renewable energy sources,   etc   ; air temperature; buildings; heat exchangers; heat pumps; pipes;     Show all 8 Subjects
Abstract:
... Thermally activated building systems (TABS) consist of pipes or ducts embedded in the building structure. This is a well-known technology for its capability to reduce energy use for cooling buildings. Additionally, TABS help integrating renewable energies, such as free-cooling with ground heat exchangers (GHE). However, TABS cooling load is sensitive to the internal load, and the use of GHE for fr ...
DOI:
10.1016/j.renene.2017.09.051