Herein, a novel methodology to perform optimal sizing of AC-linked solar PV-PEM systems is proposed. The novelty this work the proposition plant electrolyzer capacity ratio (AC/AC ratio) as optimization variable. impact AC/AC on Levelized Cost Hydrogen (LCOH) and deviation DC/AC when optimized specifically for hydrogen production are quantified. Case studies covering Global Horizontal Irradiation (GHI) range 1400–2600 kWh/m2-year assessed. obtained LCOHs between 5.9 11.3 USD/kgH2 depending...

Chloroplast (trnL-F and rbcL) sequences were used to reconstruct the phylogeny of Geraniaceae Hypseocharitaceae.According these data Hypseocharitaceae are monophyletic.Pelargonium Monsonia sisters largest clade Geraniaceae, formed by Geranium, Erodium California.According molecular dating dispersal-vicariance analysis, split stem branches probably occurred during Oligocene, in southern Africa or plus Mediterranean area.However, their diversification Miocene, coinciding with beginning major...

The activities of the current European RACE and ACTS projects have led to an increasing interest in OFDM (orthogonal frequency division multiplexing) as a means combating impulsive noise multipath effects making fuller use available bandwidth system. This paper analyses performance signals amplifier nonlinearity. In particular, bit error rate (BER) degradation result amplitude limiting or clipping are analysed. presence both nonlinear distortion additive Gaussian noise, optimized output...

This paper provides the description and results of a recently developed statistical UWB multipath channel model. A new set parameters has been defined obtained from large measurement campaign process. The parameter values, detailed model final results, are covered in this contribution.

This study determines the viability and profitability of photovoltaic (PV) mounting structures on industrial roofs. For this purpose, more than 656,000 different cases have been analyzed, combining consumption patterns, energy prices, locations, inclinations, azimuths, capacity installed, excess income. The results show that industry’s pattern is a key factor, leading to significant reductions in available assembly budget for inclined compared coplanar option when seasonal and/or irregular....

This paper describes a systematic methodology for complete stability analysis of nonlinear microwave multifunction circuits. The proposed strategy has two different stages: the nominal steady-state solution and use continuation techniques to efficiently determine unstable operation ranges. is demanding due multiple loops contained in large circuit. first step check possible fulfillment oscillation startup conditions at circuit nodes followed by pole-zero identification. Given complexity...

This paper discusses, in a mathematical form and supported by complete special experimental characterization, the gate-to-source nonlinear capacitor contribution on small-signal intermodulation distortion (IMD) as well other related phenomena such onset of phase gain compression GaAs FET devices. A simplified one-sided version our previously proposed test setup its corresponding characterization formulation are shown to conform direct technique extract second- third-order coefficients for...

The wine production process has a high energy demand of about 1,750 million kWh per year in the EU. Saving energy, responsible consumption and efficient use sources are key aspects to consider for competitiveness viability sector. Therefore, TESLA project (Transfering Energy Save Laid on Agroindustry), funded by European Commission, conducted 39 audits wineries from four countries (Spain, France, Portugal Italy). information collected allowed them carry out comparative analysis efficiency...

The present work analyzes the feasibility of using solar water heating systems (SWHS) to supply hot required in winemaking industries. demand sector was characterized by selecting patterns that encompass wide range existing casuistry. After determining production potential SWHS an experimental system, 22500 energy simulations were carried out, combining different locations, prices, and prices necessary investment. results demonstrate seasonality irregularity a winery’s pattern drastically...

Path-loss in indoor environments is investigated at 1.8 GHz, using a power-law model where the exponent of distance descriptive random variable. The extremely simple and easily applicable practice by working engieers who need only make few measurements to get knowledge path loss sufficient for many applications. fits well experimental data various under different propagation conditions, including cross polarization, observed behavior suggests possibility one distribution function...

This paper presents an in-depth study of a UWB indoor radio channel between 1 and 9 GHz, which was used for the subsequent development new statistical multipath model, focusing on short range scenarios. The sounding process carried out covering different environments, such as laboratories, halls or corridors. A combination traditional parameters has been to accurately model impulse response in order perform precise temporal estimation received pulse shape. is designed specifically digital...

This paper provides the results of a complete study about indoor radio propagation channel at 17 GHz. Wideband parameters, as coherence bandwidth or rms delay spread, and coverage are analyzed for design an OFDM-based broadband WLAN. A discussion some adequate system parameters is also included. The report presents characterization well previously developed model; both them have been checked compared to bibliography in order verify their reliability.

Results showed more published papers, collaboration with U.S. colleagues, preference for English, and uneven research impact.

In this paper, a new technique is presented for the global stability analysis of nonlinear microwave circuits using harmonic balance commercial software. The stable operation region in any two-parameter plane determined from combination bifurcation conditions and continuation technique. case asynchronous instability, quasi-periodic solution paths are entirely traced their analyzed, which allows prediction possible chaotic responses. method makes both kinds analysis, limited so far to...