12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 2016
http://hdl.handle.net/2263/61359
2024-03-28T17:41:52ZExperimental investigation of effusion and film cooling for gas turbine combustor
http://hdl.handle.net/2263/62098
Experimental investigation of effusion and film cooling for gas turbine combustor
Inanli, S.; Yasa, T.; Ulas, A.
Experimental study was conducted to understand the heat
transfer characteristics of film or effusion cooled test plates that
represent the gas turbine combustor liner. Two effusion cooling
test plates having different hole angles (30 and 75° with
horizontal) were used. Film cooling tests were conducted by six
different slot geometries. Test geometries were the scaled-up
model of real combustor liner. Three different blowing ratios
were applied for each test plate geometry. Surface cooling
effectiveness was determined for each test condition by
measuring the surface temperature distribution by infrared
thermography technique. Effects of geometrical and flow
parameters on cooling effectiveness were investigated.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
2016-01-01T00:00:00ZExperimental investigation of domestic gas boiler fitted with organic rankine cycle module
http://hdl.handle.net/2263/62097
Experimental investigation of domestic gas boiler fitted with organic rankine cycle module
Wajs, J.; Mikielewicz, D.; Bajor, M.
The results of investigations conducted on the prototype of vapour driven micro-CHP unit integrated with a gas boiler are presented. The system enables cogeneration of heat and electric energy to cover the energy demand of household. The idea of such system is to produce electricity for own demand or for selling it to the electric grid – in such situation the system user will became the prosumer. A typical commercial gas boiler, additionally equipped with an organic Rankine cycle (ORC) module based on environmentally acceptable working fluid can be regarded as future generation unit.
In the paper the prototype of innovative domestic cogenerative ORC system, consisting of a conventional gas boiler and a small size axial vapour microturbines (in-house designed for ORC and the commercially available for Rankine cycle (RC)), evaporator and condenser were scrutinised. In the course of study the fluid working temperatures, rates of heat, electricity generation and efficiency of the whole system were obtained. The tested system could produce electricity in the amount of 1 kWe. Some preliminary tests were started with water as working fluid and the results for that case are also presented. The investigations showed that domestic gas boiler was able to provide the saturated/superheated ethanol vapour (in the ORC system) and steam (in the RC system) as working fluids.
papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
2016-01-01T00:00:00ZExperimental investigation of a helical coil heat exchanger operating at sub- and supercritical state in a small-scale solar orc installations
http://hdl.handle.net/2263/62096
Experimental investigation of a helical coil heat exchanger operating at sub- and supercritical state in a small-scale solar orc installations
Lazova, M.; Kaya, A.; Huisseune, H.; De Paepe, M.
In this study, an experimental investigation of the
performance a helical coil heat exchanger operating at sub- and
supercritical conditions was carried out. The heat exchanger
was coupled and tested in a small-scale Organic Rankine Cycle
installation with a net cycle capacity of 3 kW and with a heat
source inlet temperature of 100 °C. The first measurements
were conducted under controlled conditions in a laboratory.
Towards determining the effects of different parameters on the
heat transfer rate in the heat exchanger several set of
measurements were conducted. Particularly, the performance
analysis are elaborated considering the changes of various
parameters such as the mass flow rate, inlet temperature and
operating pressure of the organic (working) fluid (R-404A) at
the cold side. While all the parameters at the inlet of the hot
side were kept stable for all set of measurements. From the
experimental results and the performance evaluation of the heat
exchanger it was found that a better performance is achieved
when operating at supercritical state.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
2016-01-01T00:00:00ZExperimental investigation on heat transfer characteristics of high blockage ribs channel
http://hdl.handle.net/2263/62099
Experimental investigation on heat transfer characteristics of high blockage ribs channel
Yang, Weihua; Xue, Shulin
The heat transfer and pressure loss characteristics on a square
channel with two opposite surfaces roughened by high
blockage ratio ribs are measured by systematic experiments.
Reynolds number studied in the channel range from 1400 to
4500. The rib height(e) to hydraulic diameter(D) ratios are 0.2
and 0.33, respectively. The rib spacing(p) to height ratio(p/e)
ranges from 5 to 15. The rib orientations in the opposite
surfaces are symmetric and staggered arrangement. The
experimental results show that (1) the heat transfer coefficients
are increased with the increase of rib height and Reynolds
number, though at the cost of higher pressure losses; (2)when
the rib spacing to height ratio is 10, it keeps a highest heat
transfer coefficient in three kinds of rib spacing to height ratio 5,
10 and 15; (3)the heat transfer coefficient of symmetric
arrangement ribs is higher than the staggered arrangement ribs,
but the pressure losses of symmetric arrangement ribs is larger
than the staggered arrangement ribs.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
2016-01-01T00:00:00Z