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  • Energy Research
  • Open Access
  • Energies

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  • Open Access
    Authors: 
    Juan Pardo; Ana M. Mejías; Antonio Sartal;
    Publisher: Energies
    Country: Spain

    s society. Considering this, this paper assesses the importance of biomass-based heating and hot-water systems in the achievement of more sustainable buildings. Using a simplified calculation method, we jointly analyzed the potential operational cost savings and reducti...

  • Open Access English
    Authors: 
    Pierre-Henri Musiedlak; Edward Ransley; Martyn Hann; B. F. M. Child; Deborah Greaves;
    Publisher: MDPI AG

    Stokes Computational Fluid Dynamics (CFD) code OpenFOAM (4.2, OpenFOAM.org, London, UK). The coupling technique enables the simulation to change between codes, depending on an indicator relating to wave steepness identified as a function of the confidence in the linear ...

  • Open Access
    Authors: 
    Yingjie Tang; Zheren Zhang; Zheng Xu;
    Publisher: MDPI AG

    s turn-off performances, which should be carefully considered in parameter design. First, the calculation models for the turn-off process are discussed, including the conventional low frequency model and the broadband model. Then, it is found that high-frequency equipme...

  • Open Access English
    Authors: 
    Liu Hua; Xue Chen; Chen Zhongcan; Caobing Wei; Zuo Chen; Wang Jiang; Duan Yanjun; Ren Nan; Li Jian; Zhang Xingzhou;
    Publisher: Multidisciplinary Digital Publishing Institute

    The conductive and radiative properties of participating medium can be estimated by solving an inverse problem that combines transient temperature measurements and a forward model to predict the coupled conductive and radiative heat transfer. The procedure, as well as t...

  • Open Access
    Authors: 
    Manu Lahariya; Dries F. Benoit; Chris Develder;
    Publisher: MDPI AG
    Country: Belgium

    Electric vehicle (EV) charging stations have become prominent in electricity grids in the past few years. Their increased penetration introduces both challenges and opportunities; they contribute to increased load, but also offer flexibility potential, e.g., in deferrin...

  • Open Access English
    Authors: 
    María Del Carmen Ruiz-Abellón; Antonio Gabaldón; Antonio Guillamón;
    Publisher: Multidisciplinary Digital Publishing Institute

    In this paper, we propose a novel approach for clustering time series, which combines three well-known aspects: a permutation-based coding of the time series, several distance measurements for discrete distributions and hierarchical clustering using different linkages. ...

  • Open Access English
    Authors: 
    Shereen K. Sibie; Mohamed F. El-Amin; Shuyu Sun;
    Publisher: Multidisciplinary Digital Publishing Institute

    The atmosphere contains 3400 trillion gallons of water vapor, which would be enough to cover the entire Earth with a one-inch layer of water. As air humidity is available everywhere, it acts as an abundant renewable water reservoir, known as atmospheric water. The effic...

  • Open Access
    Authors: 
    Jose A. Riveros; Joel Prieto; Marco Rivera; Sergio Toledo; Raul Gregor;
    Publisher: MDPI AG

    Pulse width modulation (PWM) strategies for the control of asymmetrical six-phase drives have been widely studied since the beginning of this century. Nevertheless, space vector modulation (SVM) techniques with multifrequency voltage injection for the control of all the...

  • Open Access
    Authors: 
    Tingting Zhu; Yuanzhe Li; Zhenye Li; Yiren Guo; Chao Ni;
    Publisher: MDPI AG

    The installed capacity of photovoltaic power generation occupies an increasing proportion in the power system, and its stability is greatly affected by the fluctuation of solar radiation. Accurate prediction of solar radiation is an important prerequisite for ensuring p...

  • Open Access English
    Authors: 
    Hyunbin Jo; Jongkeun Park; Woosuk Kang; Junseok Hong; Sungmin Yoon; Howon Ra; Changkook Ryu;
    Publisher: Multidisciplinary Digital Publishing Institute

    Tangential-firing boilers develop large swirling fireballs by using pulverized coal and air from the corners of the burner zone. During operation, however, the boiler may experience an uneven air supply between corners; this deforms the fireball, raising various issues ...