In various applications, thermoelectric active cooling systems can help maintain electronic devices at a desired temperature condition better than passive coolers. Thermoelectric Coolers (TEC) are especially useful when the temperature of a device needs to be precisely controlled. This study proposes a user-friendly graphical method for calculating the steady-state operational point of a TEC ba...

We propose a refrigeration scheme in mesoscopic superconductor-quantum dot hybrid device. The setup can significantly cool down normal metal coupled to the device by applying bias voltage across system. demonstrate that cooling power be as large 0.05$\Delta_0^2/h$ where $\Delta_0$ is absolute value of superconducting order parameter. In contrast previous proposals, our operates without any magn...

A heart scanner based on high-T, SQUIDS is currently under development at the University of Twente. It is intended to be used in standard clinical environments without a magnetically shielded room. In order to make the application simple to use, the SQUIDS will be cooled by small cryocoolers, thus realizing a turnkey apparatus. The aimed field resolution is 50 ffRMs HZ-‘/~ in a measuring band o...

Seebeck coefficient is one of the key parameters to evaluate the performance of thermoelectric coolers. However, it is very difficult to directly measure Seebeck coefficient perpendicular to thin film devices because of the difficulty of creating a temperature gradient and measuring localized temperature and voltage change simultaneously. In this paper, a novel method is described and it is use...

Most of the developing nations like Nigeria intend to develop in a sustainable manner. This development cannot be realized if refrigerated-based air conditioning systems that are characterized by high power requirement, high cost and with a negative influence on t he environment are used as a means of achieving thermal comfort in living spaces. Evaporative coolers are viable options of achievin...

SiGe is a good thermoelectric material for high temperature applications. In this paper the fabrication and characterization of single-element SiGe/Si superlattice coolers of both nand p-type devices are described for room temperature applications. Superlattice structures were used to enhance the device performance by reducing the thermal conductivity between the hot and the cold junctions, and...

An excellent molecule-based cryogenic magnetic refrigerant, gadolinium acetate tetrahydrate, is here used to decorate selected portions of silicon substrate. By quantitative magnetic force microscopy for a variable applied magnetic field near liquid-helium temperature, the molecules are demonstrated to hold their magnetic properties intact, and therefore their cooling functionality, after their...