Search results for " Direct"

Guía comercial de Valencia y su provincia : publicada con datos del anuario del comercio (Bailly-Bailliere)

Index Premiada amb medalla d'Or en l'exposició de Barcelona 1888, amb medalla d'Argent en la de Paris 1889 i amb el gran Diploma d'Honor en el Concurs Internacional de Madrid de 1890. Any 10é de la publicació

Guía comercial de Valencia y su provincia : publicada con datos del anuario del comercio (Bailly-Bailliere)

Index Premiada amb medalla d'Or en l'exposició de Barcelona 1888, amb medalla d'Argent en la de Paris 1889 i amb el gran Diploma d'Honor en el Concurs Internacional de Madrid de 1890. Any 16é de la publicació

Plano general de Valencia con su urbanización actual, dibujado exclusivamente para la Ruta del Viajero

Dividit per quadrícula alfanumèrica

Do women directors behave more ethically than men directors of the audit committees with respect to the quality of the accounting information?

2018

In this analysis, we aim at investigating how audit committees (ACs) gender diversity impacts on the quality of financial information, calculated with the opinion that external auditors give firms in the audit report. We hypothesize that there is a negative relation between gender diversity on ACs and the likelihood of receiving a qualification with errors, non-compliance and the omission of information, and a positive association between gender diversity on ACs and the probability of disclosing qualifications with uncertainties. The results show a negative association between the proportion of women directors on ACs, the proportion of institutional women directors on ACs and ACs chaired by…

Energy Storage by using HVDC Power Cables

2018

The development of HVDC (high voltage direct current) systems closely follow the growth of global energy requirements. In particular, HVDC cables are conveniently used for the interconnection of geographical areas which need a low environmental impact and/or when submarines interconnections have to be built up. The paper investigates the stored energy value in an HVDC cable during its normal duty and if it is possible to take advantage of this energy when the cable is disconnected for some reason. In particular, the idea is to store the cable energy, which would be dissipated uselessly, by using a dedicated system and then reuse it when favorable conditions hold, e.g a convenient economic s…

Design, assembly and characterization of silicide-based thermoelectric modules

2016

ID: 1143 In: Energy conversion and management, 13-21. Summary: Highlights•Novel silicide-based thermoelectric modules were experimentally investigated.•The modules produced high power of 1.04 W at 405 °C and 3.24 W at 735 °C.•An estimated module efficiency of 5.3% represent the highest reported for silicide systems.AbstractSilicides have attracted considerable attention for use in thermoelectric generators due mainly to low cost, low toxicity and light weight, in contrast to conventional materials such as bismuth and lead telluride. Most reported work has focused on optimizing the materials properties while little has been done on module testing. In this work we have designed and tested mod…

Cost-effectiveness analysis of sewer mining versus centralized wastewater treatment: Case study of the Arga river basin, Spain

2015

ABSTRACT:In the context of the EU Water Framework Directive, a Cost-Effectiveness Analysis (CEA) was performed to compare centralized and decentralized wastewater treatment strategies aimed to improve the ecological status of a Spanish river. The implementation of several hybrid membrane bioreactors within the urban framework for sewer mining (SM) was compared with the more common wastewater treatment plant enlargement option. The assessment ranked 6 alternatives based on 12 potential scenarios, aimed at narrowing the uncertainty of the CEA. The cost analysis illustrated that SM is the most expensive option regarding both investment and operation and maintenance costs. However, the effectiv…

On Thermoeconomic Diagnosis of a Fouled Direct Expansion Coil: Effects of Induced Malfunctions on Quantitative Performance of the Diagnostic Technique

2017

Thermoeconomic diagnosis represents a promising technique for the detection of common faults in refrigeration systems, which are responsible of degradation in their energetic performance. Recently, the authors have carried out a sensitivity analysis of the performance of this method to the thermodynamic conditions of inlet air and to the geometry of the direct expansion coil, in case of degradation induced by evaporator fouling. The analysis showed that the method is able to detect this fault, but sometimes its quantitative assessments are not satisfactory. In order to understand more in-depth the origin of such results and identify margins for refinement of the technique, this paper is aim…

Economic feasibility study for wastewater treatment: a cost-benefit analysis.

2010

Water resource management should be made from a multidisciplinary perspective. In this sense, economic research into the design and implementation of policies for the efficient management of water resources has been emphasized by the European Water Framework Directive (WFD). Cost-benefit analysis (CBA) is one of the more widely accepted economic instruments since it is a rational and systematic decision-making support tool. Moreover, the wastewater treatment process has significant associated environmental benefits. However, these benefits are often left uncalculated because they have no market value. In this paper, using the concept of shadow price, a quantification of the environmental be…

Hybrid moving bed biofilm reactors: a pilot plant experiment.

2008

The growing increment of the urbanization and on the other hand, the even more strict effluent limits imposed by the Water Framework Directive for the receiving water body quality state have lead to a need of upgrading several existing WWTP. With this respect HMBBR systems are an innovative solution since allow to upgrade existing high loaded WWTP without building new tanks. However, some uncertainties in their design, maintenance as well as performance have to be addressed due to their recent acquisition compared with well consolidated technologies such as activated sludge systems. In this light, a data gathering campaign on a HMBBR pilot plant has been performed. The aim was to detect the…