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  • ddc:330  (24)
  • Amsterdam: Elsevier  (24)
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  • 11
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    Amsterdam: Elsevier
    Publication Date: 2018-12-05
    Description: This study investigates the influence of socioeconomic and demographic characteristics of the population on residential energy utilization patterns at the ZIP code level in San Antonio, Bexar County, Texas. The City of San Antonio, Texas is the seventh most populous city in the United States and second in the State. Variables analyzed include gender, median age, median income, educational attainment, occupancy, population density, total energy, per capita energy and per home energy. Statistically significant relationships between variables are discovered and highlighted in support of public policy development to ensure long-term, and cost-effective energy management.
    Keywords: ddc:330 ; Energy engenderment ; Population and energy ; Residential energy consumption ; Socio-demographics and consumption ; Zip code analyses
    Language: English
    Type: doc-type:article
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  • 12
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    Amsterdam: Elsevier
    Publication Date: 2018-12-05
    Description: While plancha-type cookstoves are very popular and widely disseminated in Latin America, few peer review articles exist documenting their detailed technical performance. In this paper we use the standard Water Boiling Tests (WBT) to assess the energy and emission performance of five plancha-type cookstoves disseminated in about 450 thousand Mexican rural homes compared to the traditional 3-stone fire (TSF). In the high-power phase, average modified combustion efficiencies (MCE) for plancha-type stoves were 97±1% which was higher than TSF 93±4%, and reductions in CO and PM2.5 total emissions were on average 44%. Time to boil and specific fuel consumption, however, were increased in plancha-type stoves compared to the open fire as a result of the reduced overall thermal efficiency of the plancha during WBT. In the simmering phase, plancha-type stoves showed much more consistent performance reductions compared to the TSF. MCE for plancha stoves were on average 98±1% and 95±3% for the TSF, while reductions in CO and PM2.5 total emissions were on average 55%. In this phase 27% average savings in fuel use are achieved by plancha-type stoves. Removal of the plancha rings resulted in savings of specific fuel consumption (SFC), thermal efficiency (TE), and time to boil; however, CO and PM2.5 emissions increased significantly as flue air is drawn through the comal surface rather than through the combustion zone, resulting in suboptimal combustion conditions. International Workshop Agreement (IWA) energy performance Tiers for plancha-type stoves ranged from 0 to 1. However, these results contrast sharply with the well documented reductions in fuel consumption during daily cooking activities achieved by these stoves. IWA indoor emissions Tiers are 4 for both PM2.5 and CO using locally measured values for fugitive emissions. Optimization of combustion chamber design on these stoves in Mexico is desirable to further reduce indoor emissions and to reduce the impacts of neighborhood pollution that can re-infiltrate kitchens. Comparison of performance between plancha-type stoves and unvented stoves should reflect the substantial gains that are made by reducing indoor air pollution and exposures by venting pollutants.
    Keywords: ddc:330 ; 3-Stone fire ; Emissions ; Performance ; Plancha-type stoves ; Water boiling test
    Language: English
    Type: doc-type:article
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  • 13
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    Amsterdam: Elsevier
    Publication Date: 2018-12-05
    Description: Analysis of water use for power generation has, in the past, focused on large geographical regions and time scales. Attempting to refine this analysis on the time and spatial scales could help to further understand the complex relationships involved in the energy-water nexus, specifically, the water required to generate power. Water factors for different types of plants and cooling systems are used from literature in combination with power generation data for different balancing authorities to model water use as a function of time based on the fuel mix and power generated for that region. This model is designed to increase public awareness of the interrelation between the energy consumed and water use that can be taken into account when making decisions about electrical energy use. These results confirm that areas with higher renewable energy penetration use less water per unit of power generated than those with little or no renewable technologies in the area, but this effect is heavily dependent on the distribution of the types of renewable and conventional generation used.
    Keywords: ddc:330 ; Generation mix ; Power generation ; Thermoelectric power ; Water conservation ; Water use
    Language: English
    Type: doc-type:article
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  • 14
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    Amsterdam: Elsevier
    Publication Date: 2018-12-05
    Description: This study evaluates performance of passive thermal management system of high power Li-ion batteries in a cold environment. Two different phase change materials (PCM) consisting of pure paraffin and paraffin-graphite composites are considered and compared with a battery module in absence of PCM material. Battery modules are partially discharged for a period and then subjected to different cold time periods representing short and long vehicle stops during winter. Battery performance parameters such as capacity, power, and temperature along with thermophysical properties of each module are recorded, calculated, and compared for different scenarios. Thermal management systems moderate temperature rise during discharge and slow the temperature loss during cold stops but also slow the temperature rise after cold stops. Results show that after a short (10 min) cold stop the paraffin wax offers no advantage by keeping the module warm. Both paraffin and no PCM modules had comparable energy values. On the other hand, during long (2 hours) cold stops a significant detriment (15% reduced energy vs 6% reduced energy) was observed in PCM modules by delaying battery warm up when compared to modules with no PCM. Commercial PCM modules with graphite/paraffin composites performed in-between PCM and no PCM modules (9% reduced energy) after long cold soaks but had no advantage for short cold soaks (2.5% energy reduction) due to higher heat dissipation.
    Keywords: ddc:330 ; Lithium-ion battery ; Phase change material ; Thermal management system
    Language: English
    Type: doc-type:article
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  • 15
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    Amsterdam: Elsevier
    Publication Date: 2018-12-19
    Description: This paper focuses on the study of the ICT applied to the role of logistics in companies relationships, therefore a deeper analysis will be carried out on how the ICT affect the traditional chain of consequences: Service Quality - Value - Satisfaction - Loyalty. The SEM analysis is used in order to contrast the hypotheses of the links proposed bearing in mind the high/low presence of the ICT. The results on the reliability and validation analysis of the scales used are satisfactory and our conclusions confirm the above mentioned chain of consequences and remark the ICT influence when describing these relations.
    Keywords: ddc:330 ; ICT ; logistics ; supply Relationships ; logistics service quality ; logistics value
    Language: Spanish
    Type: doc-type:article
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  • 16
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    Amsterdam: Elsevier
    Publication Date: 2018-12-19
    Description: Literature about cooperative agreement shows us the importance of some factors in the success of the cooperative agreements. We will focus on the study of two variables with high social component, such as trust and commitment. Our objective is to evaluate if there are significant differences in both variables between the different reasons that motive companies to cooperate. If these significant differences appear there will be important managerial implications because managers would have more information in the decision making process because they would be identifying some reasons with higher level of those success key factors. Moreover, we carry out the empirical study in Spanish agro-alimentary industry because we consider that there are a few studies about cooperative agreement in mature sector with low technological component.
    Keywords: M19 ; L14 ; L66 ; ddc:330 ; cooperative agreement ; reasons ; trust ; commitment
    Language: Spanish
    Type: doc-type:article
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  • 17
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    Amsterdam: Elsevier
    Publication Date: 2018-12-19
    Description: This study focuses on the structure of the board of directors that is considered more suitable in terms of corporate social responsibility, and also on those contextual factors that could influence the socially responsible behavior of family firms. Empirical analysis on 535 non-listed Spanish firms leads to the identification of three clusters in terms of the variables related to boards´ structure: family dominated boards, professional boards and immature boards. Results show that the firms that have boards' structure with more potential for a socially responsible behavior (professional boards) are the ones who are bigger, older and with higher generational evolution.
    Keywords: M14 ; M19 ; ddc:330 ; family firm ; board of directors ; social responsibility ; stakeholders.
    Language: Spanish
    Type: doc-type:article
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  • 18
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    Amsterdam: Elsevier
    Publication Date: 2018-12-19
    Description: Marketing has evolved as a relevant scientific discipline in Spain over the last years. This paper tries to highlight what has characterized this development in the last two decades, and what is its current status. To reach this aim, we compare the major research which reviews marketing discipline in our country and we examine the content of the last eight editions of the main conference on marketing held in Spain, the Spanish Marketing Academic Conference. The final objective of this work is to expand the knowledge of marketing research in Spain, analysing aspects such as the degree of concentration/specialization of the papers, the authors of these papers, their evolution over past editions, etc.
    Keywords: ddc:330 ; marketing ; research ; congress ; tracks ; review
    Language: Spanish
    Type: doc-type:article
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  • 19
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    Amsterdam: Elsevier
    Publication Date: 2018-12-19
    Description: This paper aims to analyse the Basque Country companies' view about the financial valuation of intangibles relevance and its influence on business performance. To achieve this objective, a field study has been done with 440 telephone calls to Basque Country companies' financial managers. Then, their responses and theirs firm's performance are analysed. The results show that the companies that are interested in the financial valuation of the intangibles, specially for internal motivation, perform better, however, this improvement is not statistically significant. Otherwise, the companies that are more interested in the valuation of their intangibles for external reasons need to provide information to stakeholders about their ability to generate income.
    Keywords: M10 ; O16 ; G30 ; ddc:330 ; intangibles ; financial valuation of intangibles ; managers' opinion ; business performance
    Language: Spanish
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  • 20
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    Amsterdam: Elsevier
    Publication Date: 2018-12-05
    Description: We present a cooking technology consisting of a solar panel directly connected to an electric heater inside of a well-insulated chamber. Assuming continued decrease in solar panel prices, we anticipate that in a few decades Solar Electric Cooking (SEC) technologies will be the most common cooking technology for the poor. Appropriate use of insulation reduces the power demand making low-power Insulated Solar Electric Cooking (ISEC) systems already cost competitive. We present a $100 prototype and preliminary results of two implementations in Uganda.
    Keywords: ddc:330
    Language: English
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