Buscar
Assessment of Parametric Assembly Models Based on CAD Quality Dimensions
(Taylor & Francis, 2018)
An approach to convey CAD quality
-
oriented strategies to beginning
users
to create
bottom
-
up
assemblies
is described
.
The work builds on previous
efforts in the area of single part ...
Experimental study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement
(Elsevier, 2015)
This work presents an experimental analysis of a non-flammable R1234ze(E)/R134a mixture (R450A) as R134a drop-in replacement. While R134a has a high GWP value (1430), the R450A GWP is only 547. The experimental tests are ...
Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potential
(Elsevier, 2018-12-15)
High-temperature heat pumps (HTHPs) based on vapour compression can be used for industrial
low-grade waste heat valorisation, which can aid in mitigating climate change. Currently, the
performance of HTHPs ...
Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids
(Elsevier, 2015)
This paper presents a model of shell and tube evaporator with micro-fin tubes using R1234yf and R134a. The model developed for this evaporator uses the ε-NTU method to predict the evaporating pressure, the refrigerant ...
Transverse vibrations in existing railway bridges under resonant conditions: Single-track versus double-track configurations
(Elsevier, 2010)
In this paper, the dynamic performance of a certain kind of existing bridge under the action of high-speed railway traffic is addressed. Short-to-medium-span simply supported structures are susceptible to experiencing ...
Dynamic performance of existing high-speed railway bridges under resonant conditions retrofitted with fluid viscous dampers
(Elsevier, 2010)
This paper deals with the application of Passive Control techniques to mitigate the excessive vibrations that short simply supported railway bridges may undergo under the circulation of High-Speed trains. A possible solution ...
Identifying design guidelines to meet the circular economy principles: A case study on electric and electronic equipment
(Elsevier, 2018-08)
This study presents a methodology that allows the analysis of how an existing product design meets the design guidelines required from the circular economy perspective, and which are the design guidelines that would need ...
Dynamic performance of existing double track railway bridges at resonance with the increase of the operational line speed
(Elsevier, 2017-02-01)
This article addresses the dynamic behaviour of double track simply supported bridges of short to medium span lengths
(10 m < L < 25 m) belonging to conventional railway lines. These structures are susceptible to experience ...
Evaluation of energy density as performance indicator for thermal energy storage at material and system levels
(Elsevier, 2019-02-01)
The increase of the capacity factor of thermal processes which use renewable energies is closely linked to the implementation of thermal energy storage (TES) systems. Currently, TES systems can be classified depending on ...
R-152a as an alternative refrigerant to R-134 a in domestic refrigerators: An experimental analysis
(Elsevier, 2018-09)
Among all sectors of refrigeration, one of the most affected by the latest international regulations is the domestic refrigeration. Although for it has been suggested some solutions, such as the construction of household ...