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Influence of the activator concentration and calcium hydroxide addition on the properties of alkali-activated porcelain stoneware
(Elsevier, 2014-07)
Objective
The aim of this research was to investigate the influence of the alkali activator concentration and calcium dosage on the fresh behavior, compressive strength and microstructure of the binder produced by the ...
Attitude towards the incorporation of the selective collection of biowaste in a municipal solid waste management system. A case study
(Elsevier, 2014-12)
European waste legislation has been encouraging for years the incorporation of selective collection systems for the biowaste fraction. European countries are therefore incorporating it into their current municipal solid ...
Characterization and modeling of a scroll expander with air and ammonia as working fluid
(Elsevier, 2014-09)
This paper presents the experimental characterization and modeling of a scroll expander. The expander used here is a scroll compressor modified to work as an expander. It is characterized in two experimental setups using ...
Energetic evaluation of a CO2 refrigeration plant working in supercritical and subcritical conditions
(Elsevier, 2014-05)
Unlike other refrigerants, R744 (or carbon dioxide) has a very low critical temperature (30.98 °C) which hampers working in subcritical conditions especially when the environment is used as a heat rejection sink. Accordingly, ...
Dynamic performance of existing high-speed railway bridges under resonant conditions following a retrofit with fluid viscous dampers supported on clamped auxiliary beams
(Elsevier, 2014-02)
This contribution investigates the application of Passive Control techniques to reduce the severe transverse vibrations that railway bridges of moderate lengths may experience under resonant conditions. The proposed solution ...
Influence of the vehicle model on the prediction of the maximum bending response of simply-supported bridges under high-speed railway traffic
(Elsevier, 2014-08)
This investigation intends to contribute to the problem of train-bridge interaction in high-speed railway lines. For design purposes, most often a numerical model based on constant moving loads is used to reproduce the ...
Technologies for Building a Spatial Augmented Reality Prototype to Act as a Creative Resource for Designers and Artists
(Common Ground Publishing, 2015-07)
This paper analyzes the technologies, devices and equipment available today that can contribute to the creation
of an interactive environment based on Spatial Augmented Reality (SAR). The objective is to define what should ...
Experimental Assessment of the Internal Heat Exchanger in Vapour Compression Systems With Low GWP Refrigerant R516A
(Elsevier, 2022)
Internal heat exchangers (IHX) are commonly used
to improve the energy performance of vapour
compression refrigeration cycles. However, the
magnitude of the improvement depends on the
refrigerant and operational ...
Small capacity absorption systems for cooling and power with a scroll expander and ammonia based working fluids
(Elsevier, 2014-11)
Up to now, the use of ammonia/water absorption cycles has been mainly limited to the production of refrigeration or air conditioning but due to the relatively high generator pressure some authors have proposed the integration ...
New positions for an internal heat exchanger in a CO2 supercritical refrigeration plant. Experimental analysis and energetic evaluation
(Elsevier, 2014-02)
IHX is probably, one of the most commonly alternative used to improve cooling capacity and COP in a CO2 refrigerating plant working in supercritical conditions. The “classical” position at gas-cooler exit has been analyzed ...