The conditions for disk evaporation by electron thermal conduction are examined, using a simplified semi–analytical 1-D model. The model is based on the mechanism proposed by Meyer & Meyer–Hofmeister (1994) in which an advection dominated accretion flow evaporates the top layers from the underlying disk by thermal conduction. The evaporation rate is calculated as a function of the density of th...

The effect of alkanoic acid [CH(3)(CH(2))(n-2)COOH; HCn] and perfluoroalkanoic acid [CF(3)(CF(2))(n-2)COOH; FCn] monolayers on the water evaporation rate was investigated by thermogravimetry tracing the decrease in amount of water with time. The evaporation rate from the surface covered by a monolayer was measured as a function of temperature and hydrophobic chain length of the acids, where the...

For increasing first law efficiency in terms of COP and Second law efficiency (Exergetic Efficiency) of VCR systems.the experiment is performed on VCR system to study the effect of silver oxide Nano particle(50nm) in base fluid of ethyl glycol (50:50 ratio with water) with concentration factor 0.02 to 0.06g by volume % on hot side of system (condenser side). For high efficiency out-put, the pla...

Waste heat recovery has been considered as an attractive technique to improve the overall energy utilization efficiency of internal combustion (IC) engines. In this paper, distinct from most past research work, a thermally driven refrigeration system based on combined organic Rankine and vapour compression cycles is proposed recover IC engines’ waste contained in cooling water. Based concept, l...

Erbium (Er) ion has been widely used in silica fiber-based active photonic devices, given its characteristic emission around 1.5 μm. Hydrogenated and deuterated amorphous carbon (a-C:H and a-C:D, respectively), thin film materials offering tailorable opto-electronic properties, have not been explored thoroughly as host materials for Er. The objective of this research is to study the potential s...

Thermal desalination plants consume large quantifies of heat energy for seawater evaporation. In condensing water vapor procured in evaporators and cooling distillate, a major part of heat energy is lost in the environment. Heat energy in processes of condensation and evaporation in desalination of seawater is quantitatively equal but these processes take place under different temperatures. Dif...

The performance, emission and combustion characteristics of a single cylinder four stroke variable compression ratio multi fuel engine when fueled with different blends of rice bran oil methyl ester and ethanol are investigated and compared with the results of standard diesel. Bio diesel produced from Rice bran oil by transesterification process has been used in this study. Experiment has been ...

Our understanding of homogeneous vapour bubble growth is currently restricted to asymptotic descriptions their limiting behaviour. While attempts have been made incorporate both the inertial and thermal limits into models, early stages not captured. By accounting for changing driving force restriction growth, we present an inertio-thermal model capable accurately capturing evolution a from nano...