Match!
Bogdan Diaconu
University of Porto
26Publications
10H-index
606Citations
Publications 26
Newest
Abstract Recycling ash from coal combustion deposited in dump sites and waste drilling fluid (WDF) from oil extraction industry for the purpose of partial replacement of clay in construction materials was investigated. Compressive strength, density and pore density were determined experimentally following standard procedures for test specimens manufactured from mixtures of the two waste materials and clay in varying proportions. A neural network model was developed and cross-validated based on e...
The paper presents synthetically the results of an extensive experimental study on the extent to which bottom ash resulting from coal-fired power plants has the potential to be recycled and used in the building materials industry. Unlike fly ash collected mainly from the electrostatic precipitators, the bottom ash and slag consists of large articles and incorporates unburned organic matter resulted from incomplete oxidation of combustible compounds of the coal or even unburned coal. The presence...
#2Traian AbagiuH-Index: 1
Last.Georgeta PredeanuH-Index: 4
view all 6 authors...
Development of technologies for the recovery of ash waste resulting from burning of coal without the generation of other wastes.
#2Traian AbagiuH-Index: 1
Last.Georgeta PredeanuH-Index: 4
view all 6 authors...
Development of technologies for the recovery of ash waste resulting from burning of coal without the generation of other wastes.
#2Traian AbagiuH-Index: 1
view all 7 authors...
Studying the possibilities of capitalizing the ash residue resulting from the separation of the unburned coal, the main idea is not to elaborate, as a whole, a recovery technology that generates another unused waste.
#1Adina Teodora Gheorghian (Politehnica University of Bucharest)H-Index: 3
#2Alexandru Dobrovicescu (Politehnica University of Bucharest)H-Index: 5
Last.Bogdan DiaconuH-Index: 10
view all 5 authors...
Abstract A performance assessment method for compact heat transfer surfaces is proposed, consisting of sizing a cross flow heat exchanger for given fluids, temperature and flow rate values. The resulting configuration is then used in a rating routine where only the heat transfer surface type on one exchanger side is modified while maintaining all design parameters constant. Heat exchanger core dimensions resulting from the sizing routine and the reference type on one side of the heat exchanger a...
#1Mihai CruceruH-Index: 3
#2Bogdan DiaconuH-Index: 10
The article presents the possibilities to use the biomass as a supplemental fuel in Romanian large power plants. Co-firing is the process of replacing part of the fossil fuel supplied to a power station or boiler with a 'carbon lean', renewable alternative. Usually it is used to refer to the use of solid biomass within coal fired powers stations, however co-firing of vegetable (mainly palm) oils to substitute heavy fuel oil (HFO) is also undertaken, and co-firing of other potential biofuels such...
#1Bogdan DiaconuH-Index: 10
view all 4 authors...
Indoor thermal comfort is a key issue in building design. The most important component of the thermal comfort is considered the indoor air temperature. However, radiative exchange between human body and the surfaces of the enclosure can influence to a significant extent the thermal comfort conditions. This is especially important in the case of indoor spaces with large glazed areas, such as modern office buildings. In such cases, it is essential to understand the heat transfer mechanisms and the...
Abstract View factor – defined as fraction of total outgoing radiation from surface 1 intercepted by surface 2 – is a key concept in solving the radiative heat transfer in systems of surfaces. Analytical forms of the view factor have been developed by means of integration for many conventional systems of 2D and 3D surfaces in various spatial positions. However, little investigation has been carried out for situations in which there is no complete visibility between the surfaces involved in radia...
This paper presents the components with negative environmental impacts that are found in ash, ash containment equipment typical of flue gas and fly ash utilization.
123