References of "Ngendakumana, Philippe"
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See detailInfluence of the nozzle capacity on the performance of a domestic fuel oil boiler
Ngendakumana, Philippe ULg; Masy, Cédric

in 2nd Edition of European Combustion Meeting (ECM 2005) (2005, April)

In order to investigate the influence of the nozzle capacity on the performance of fuel oil boilers, tests have been performed in transient and steady state regimes on our experimental boiler. The aim of ... [more ▼]

In order to investigate the influence of the nozzle capacity on the performance of fuel oil boilers, tests have been performed in transient and steady state regimes on our experimental boiler. The aim of the tests was to deduce the better couple nozzle - fuel injection pressure to reach the desired output power while producing fewer pollutants as possible. In short, a high fuel injection pressure associated with a low capacity nozzle is recommended. [less ▲]

Detailed reference viewed: 17 (0 ULg)
See detailEtude expérimentale des performances thermo-hydrauliques de radiateurs
Cuevas, Cristian; Trebilcock, Felipe; Ngendakumana, Philippe ULg

Report (2004)

Detailed reference viewed: 6 (0 ULg)
See detailExperimental study of the thermo-hydraulic performances of air-cooled radiators
Ngendakumana, Philippe ULg; Trebilcock, Felipe

Report (2004)

Detailed reference viewed: 4 (0 ULg)
See detailInfluence of DMM addition in light fuel oil on the flame emission in a domestic hot water boiler
Masy, Cédric; Ngendakumana, Philippe ULg

Conference (2004, August)

In order to investigate the soot reduction potentialities of DMM (called also methylal) addition in an overall lean diffusion flame, tests have been carried out on our experimental fuel oil boiler whose ... [more ▼]

In order to investigate the soot reduction potentialities of DMM (called also methylal) addition in an overall lean diffusion flame, tests have been carried out on our experimental fuel oil boiler whose burner is equipped with a spill-return atomizer. The tests have been performed in steady state regime without and with addition of DMM. During all the tests, the oxygen at the chimney was kept constant (around 3%) by adjusting the position of the burner air damper and thus the air combustion mass flow rate. The combustion chamber has two quartz windows through which the flame emission was registered by using a photodiode sensible in visible range. Classical gas analysers were used to measure the CO and NOx concentrations at the chimney. DMM percentages up to 15% (by mass) have been tested. [less ▲]

Detailed reference viewed: 14 (0 ULg)
See detailExperimental study of the thermo-hydraulic performances of humid air condensers
Cuevas, Cristian; Trebilcock, Felipe; Ngendakumana, Philippe ULg

Report (2003)

Detailed reference viewed: 7 (0 ULg)
See detailCombustion control by means of a photodiode
Ngendakumana, Philippe ULg; Tartari, Paula

in Proceedings of the 25th Task Leaders Meeting (TLM) of the IEA Implementing Agreement "Energy Conservation and Emissions Reduction in Combustion" (2003, September)

The objective of this work was to assess the feasibility of a photodiode to control combustion, instead of a spectrometer (which is an expensive sensor to be used in commercial burners). For that purpose ... [more ▼]

The objective of this work was to assess the feasibility of a photodiode to control combustion, instead of a spectrometer (which is an expensive sensor to be used in commercial burners). For that purpose, the flame emission has been measured in a hot-water boiler fired with light fuel-oil, whose nominal output power goes up to 370 kW. The parameters investigated were: overall air excess, combustion air distribution, burner power and atmospheric conditions. High influence of air distribution on the flame emission was detected by the diode, since it modifies directly the mixing quality reducing rich-fuel regions where soot can be formed. Low influence of air excess and burner power was found. When these parameters increase, the flame emission decreases. This behavior is explained by the better mixing attained at high burner power and at high air excess. However the high emission level observed at low firing rate can be reduced with a good burner adjustment. With the photodiode, it was possible to find the optimum air excess value where NO, CO and soot are as low as possible. As the photodiode measures locally in the flame, results were compared with images obtained with a CCD camera. Finally, these results are in good agreement with those obtained previously with the spectrometer. [less ▲]

Detailed reference viewed: 26 (2 ULg)
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Peer Reviewed
See detailTechnology Development for In-Flight Oxygen Collection TSTO's
Hendrick, Patrick; Verstraete, D.; Bizzarri, Didier et al

in European Journal of Mechanical and Environmental Engineering (2003), 48 n°2

Detailed reference viewed: 14 (5 ULg)
See detailPhotodiodes for Combustion Control (V2)
Tartari, Paula; Ngendakumana, Philippe ULg

Report (2003)

Detailed reference viewed: 1 (0 ULg)
Peer Reviewed
See detailTechnology Development for In-Flight Oxygen Collection TSTO's
Hendrick, Patrick; Verstraete, D.; Bizzari, Didier et al

in European Journal of Mechanical and Environmental Engineering, Vol. 48. N° 2. June 2003 (2003, June)

Detailed reference viewed: 20 (9 ULg)
Peer Reviewed
See detailModelling of an air condenser working in critical zone for engine cooling by refrigerant loop
Cuevas, Cristian; Winandy, Eric; Lebrun, Jean et al

in 6th Edition of Vehicle Thermal Management Systems (VTMS) Conference (2003, May)

A general and simple model of a condenser for engine cooling by refrigeration loop is presented. The model assumes that the condenser is divided into three distinct zones on the refrigerant side: the ... [more ▼]

A general and simple model of a condenser for engine cooling by refrigeration loop is presented. The model assumes that the condenser is divided into three distinct zones on the refrigerant side: the vapor superheated zone, the two-phase zone and the sub-cooled liquid zone. The model inputs are the dry bulb air supply temperature, the air mass flow rate, the refrigerant supply over-heating, the sub-cooling and the refrigerant mass flow rate. The model is able to give mainly the pressure and temperature in each zone and, of course also, the heat flow and the exhaust enthalpy. The model gives also the geometrical repartition or area percentage of each zone. Adjustable coefficients are used with each correlation to fit the experimental results. An example of identification and validation is presented. The condenser has been tested up to 40 bar with R134a and the model accuracy is within ±2K in condensing temperature prediction. [less ▲]

Detailed reference viewed: 31 (0 ULg)
See detailA Photodiode for Combustion Control (1)
Tartari, Paula; Ngendakumana, Philippe ULg

Report (2003)

Detailed reference viewed: 6 (1 ULg)