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In this study, we investigated the performance of honeycomb structured PVC used as packing material inside humidifier in Humidification-Dehumidification Desalination Plant. The affecting operational parameter like mass flow rate of water and air on the performance parameters of humidifier such as range, effectiveness, efficiency, water evaporation rate, heat and mass transfer rate are studied. The...
Monitoring aqueous systems using Near InfraRed (NIR) light is possible due to vibrational overtone and combination water bands located around 1400–1450nm which are highly sensitive to changes in hydrogen bonds. Hyperspectral imaging (HSI) in the NIR wavelength range offers the potential to gain information on the spatial distribution of water structures in aqueous solutions. This study examines the...
An experimental pool boiling study was conducted using plain and nanocoated heater surfaces immersed in various working fluids. Working fluids include water, ethanol and HFE-7100 and pool boiling tests were performed on a flat 1 cm × 1 cm heaters. Unlike in water, CHF enhancement of the nanocoating seems to be less or marginal in ethanol and HFE-7100 at 1 atm. The reduced effect of the nanocoating...
An electric thruster using water propellant has enormous potential for human spaceflight missions. Seriously unstable mechanisms of a previous water arcjet are analyzed. The experiment simulating the vaporization of water shows the fluctuations of the plume and the arc voltage mainly result from the vaporization process in the supply pipe. A new supply pipe including capillary bundles and a buffer...
Experiments on vapor chamber performance with working fluid of water, methanol and acetone, respectively, were conducted using our novel vapor chambers. Water has remarkably larger latent heat and surface tension, and acetone has similar surface tension as methanol but smallest latent heat. A sintered two-layer 100+200 mesh wick was adopted, and the volumetric fluid charges were the same. The footprint...
This paper presents results and commentary on the design of a back-calculation anti-windup PID controller at an open-pool research reactor. The design and analysis was performed offline. The target for the control design was the reactors pre-existing qualified distributed control system, hence the control solution was limited in scope to the existing control block algorithms. This posed some technical...
This paper describes an experimental study on the convective heat transfer of SiO2/water nanofluids inside a circular tube with imposed wall temperature. To our knowledge, very few papers have been published with temperature boundary conditions and none in cooling conditions. The experimental apparatus is described which allows us to measure local wall temperatures as well as fluid inlet/outlet temperatures...
This paper describes an experimental study on convective heat transfer and flow behaviour of SiO2/water nanofluids at different concentrations (5, 16 and 34 % in weight) inside a 1.3mm diameter tube heated at constant heat flux. The experimental test bench allowing us to measure local wall temperatures as well as fluid inlet/outlet temperatures is described. The flow regimes range from laminar to...
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