92 research outputs found
Numerical analysis of heat transfer and nanofluid flow in a triangular duct with vortex generator: two-phase model
Laminar forced convection heat transfer and nano-fluids flow in an equilateral triangular channel using a delta-winglet pair of vortex generators is numerically studied.
Three nanofluids, namely; Al2O3, CuO, and SiO2 nano-particles suspended in an ethylene glycol base fluid are examined. A two-phase mixture model is considered to
simulate the governing equations of mass, momentum and energy for both phases and solved using the finite volume method (FVM). Constant and temperature dependent
properties methods are assumed. The single-phase model is considered here for comparison.
The nano-particle concentration is assumed to be 1% and 4% and Reynolds number is ranged from 100 to 800. The results show that the heat transfer enhancement by a using vortex generator and nano-fluids is greater than the case of vortex generator and base fluid only, and the latest case provided higher enhancement of heat transfer compared to the case of a base fluid flowing in a plain duct. Considering the nano-fluid as two separated phases is more reasonable than assuming the nano-fluid as a homogeneous single phase. Temperature dependent properties model provided higher heat transfer and lower shear stress than the constant properties model. C⃝2014
Wiley Periodicals, Inc. Heat Trans Asian Res, 0(0): 1–21, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.2116
Solar assisted open cycle absorption cooling
RERIC International Energy Journal16127-41RERN
Performance characteristics of solar ponds operating at different latitudes
Applied Energy17297-115APEN
Performance characteristics of solar ponds operating at different latitudes
The results of a comparative study of the performance of solar ponds operating at different latitudes are presented in this paper. A mathematical tool was developed to study the behaviour of solar ponds operating under different physical and operational conditions. The hourly meteorological data of Kew and Singapore were used. The pond operating at higher latitudes, i.e. Kew, where seasonal variations are significant, must be deeper than a pond operating near the equator. The deeper pond can also act as an interseasonal storage device. A pond operating at a location in Singapore attains a fairly high temperature but the temperature requirements are also high for the desired applications such as space cooling in conjunction with a refrigeration cycle. Although a pond at Kew attains a lower temperature compared with a pond at Singapore, it can supply considerable amounts of thermal energy to support a space heating load. Both the ponds require auxiliary heating, the magnitude being dependent upon the nature of the load.
Development of creative and innovative talents of students
The International journal of applied engineering education53331-339IJAE
Numerical study of the thermal-hydraulic performance of evaporative natural draft cooling towers
10.1016/S1359-4311(01)00065-5Applied Thermal Engineering22141-59ATEN
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