Following harvest, fresh produce needs to be cooled immediately in a room where the air temperature and the relative air humidity are controlled to maintain the produce quality. In this paper, an experimental study for forced air cooling of fresh produce (cauliflower) is performed using a pilot developed within our laboratory. Furthermore, a numerical simulation of spherical produces, taking in...

We report on the realization of a stable mixture of ultracold lithium and ytterbium atoms confined in a far-off-resonance optical dipole trap. We observe sympathetic cooling of 6Li by 174Yb and extract the s-wave scattering length magnitude |a(6Li-174Yb)|=(13±3)a0 from the rate of interspecies thermalization. Using forced evaporative cooling of 174Yb, we achieve reduction of the 6Li temperature...

This paper explores the potential of forced convection cooling in a ducted photovoltaic façade unit. Where panel is backed by 5 cm thick insulated duct at depth 50 cm. The heat removal from unit due to investigated with range fan speeds 1 m/s 6 m/s. It found that ΔT between inlet and outlet ranged 2.6–24.6 °C. A speed 4 yielded highest removing 550 W efficiency 51%. Whereas lowest mean PV cell ...

For laser forming of sheet metal to become a practical production or rapid prototyping tool, multiscan, that is, to use a laser to scan the workpiece repeatedly is necessary in order to achieve the required magnitude of deformation. Between consecutive scans, substantial waiting time is normally necessary for the workpiece to cool down in order for a steep temperature gradient to be reestablish...

To study the temperature rise of dry-type transformer in different cooling conditions, finite element method is used in this paper to calculate temperature distribution in the transformer. Firstly, thermal-fluid coupled model of a transfomer is built up,and the equivalent heat generation of this model is figured out according to the results of delivery test. Then, thermal-fluid coupled model is...

Forced draft evaporative cooling towers are often used for condenser cooling in small steam power plants. Conventional control strategies keep the cooling pump operating at full speed all the time, and control the cooling water temperature by modulating the tower fan speed. In this work, an energy-efficient control strategy is proposed, that minimizes the combined consumption of the tower fans ...

Rotating fans are the prevalent forced cooling method for heat generating equipment and buildings. As concentration of atmospheric pollutants has increased, accumulation microscale nanoscale particles on surfaces due to advection-diffusion led adverse mechanical, chemical electrical effects that increase demands reduce reliability electronic equipment. Here, we uncover mechanisms leading enhanc...