objective: the main objective pursued in this paper is to investigate the energy consumption for drying of potato slices using vacuum-infrared drying method. methods: drying of potato slices with the thicknesses of 1, 2 and 3 mm were conducted at vacuum levels of zero (without vacuum), 20, 80 and 140 mm [hg], infrared radiation at power levels of 100, 150 and 200 w in the three repetition. resu...

Objective: The main objective pursued in this paper is to investigate the energy consumption for drying of potato slices using vacuum-infrared drying method. Methods: Drying of potato slices with the thicknesses of 1, 2 and 3 mm were conducted at vacuum levels of zero (without vacuum), 20, 80 and 140 mm [Hg], infrared radiation at power levels of 100, 150 and 200 W in the three repetition. Resu...

Objective: The main objective pursued in this paper is to investigate the energy consumption for drying of potato slices using vacuum-infrared drying method. Methods: Drying of potato slices with the thicknesses of 1, 2 and 3 mm were conducted at vacuum levels of zero (without vacuum), 20, 80 and 140 mm [Hg], infrared radiation at power levels of 100, 150 and 200 W in the three repetition. Resu...

Among solar thermal collectors, the evacuated flat panel is emerging as a reference technology for operation at temperatures high 200 °C with an increased annual energy production owing to both direct and diffuse light capture. Accurate measurements of optical properties selective absorbers used in such devices are key reliable estimation overall performance. These must be measured under vacuum...

l{nvironmental testing and flight clualification of the ‘1’OPEX/POSEIDON spacecraft solar panels were performed with infrared (IR) lamps and a control system that were newly designed and integrated. The basic goal was more rigorous testing of the. costly panels’ new conqJositestructure design without jeopardizing their safety, The technique greatly reduces the costs and high risks of testing fl...

Ground testing of WFC3 under ambient conditions during April of 2007 was performed in order to prepare for upcoming thermal vacuum testing. As a part of this ambient testing, the dark current rate of the spare UVIS package (UVIS build 2) was measured while the CCD was operating at a temperature of -54oC. This temperature is significantly higher than the nominal operating temperature of -83oC, l...

We propose a mechanism for photon mediated thermal rectification through vacuum relying only on the temperature dependence of electromagnetic resonances. We also propose an example implementation consisting of two polytypes of silicon carbide, which exploits the interaction of temperature dependent surface phonon polaritons to achieve significant rectification.

A multi-layer photonic crystal can be used to suppress coherent thermal conductance below the vacuum conductance value, over the entire high-temperature range. With interlacing layers of silicon and vacuum, heat can only be carried by photons. The thermal conductance of the crystal would then be determined by the photonic band structure. Partial photonic band gaps that present over most of the ...