Tag Archives: heat

City University of Hong Kong (CityUHK) has developed another approach to quell the self-destructive tendencies of perovskite solar cells in the face of moisture. It is a corrosion inhibitor that tackles ionic defects in the perovskite layer within the solar cell stack, even those created after manufacture. “Applying a living passivator on the perovskite surfaces enhances their resistance to environmental ...

CUI has introduced a range of ac fans with air flows 45 and 165CFM Across the 26 member CAF family there are three frame sizes – 120 x 120mm square either 26 or 38mm thick, and or 172mm circular (truncated to 150mm in one dimension) which is 51mm thick. Frames are aluminium, impeller is polymer (PBT, UL94V-0), and there is ...

UCLA researchers have made an electrically-controlled solid-state ‘transistor’ for thermal energy, with a heat-flow on-off ratio of >13:1 when controlled with a ±2.5V base bias at room temperature. The voltage-flow curve is almost a straight line, and operation at 1MHz has been demonstrated. “Precision control of how heat flows through materials has been a long-held but elusive dream for physicists ...

CUI Devices has added 20 x 20 x 6mm and 35 x 35 x 7mm fans to its thermal management products. Bearing options include sleeve, ball and the company’s own magnetic (-V suffix) and enhanced sleeve (-C or -CF). 20 x 20 types range from 0.33 to 1.56cfm and 0.02 to 0.24inch of water pressure. 30 x 30 x 7 ...

I got given a 5kW heater for the workshop, powered by diesel fuel and colloquially known as a ‘Chinese diesel heater’ (right) – they seem to be based on designs from German companies Webasto and Eberspacher. I finally got around to installing over the cold snap before Christmas, putting the heater unit inside the workshop (right) and the exhaust, air ...

Researchers in Japan have micro-fabricated a thermoelectric generator for IoT devices from non-toxic materials. The proof-of-concept consists of 36 junctions, each made from p-type Mg2Sn0.8Ge0.2 working against n-type bismuth. “The output voltages of thermoelectric conversion modules and devices generally decrease as their sizes diminish,” according to the Japanese National Institute for Materials Science (NIMS). “An approach to overcoming this miniaturisation-related ...

As a nice-to-have update, the Raspberry Pi fan controller got a user-interface, in the form of a tiny 3d-printed 2mm thick front panel (ball-point pen in photo for scale). In pushes tightly over the protruding mounting threads of the two switches. The annotations are 1mm deep pits filled with white marker pen – which got all over the place and ...

I am typing this on a Raspberry Pi 4 – running from an SSD to speed it up, otherwise random annoying paused make to too frustrating for work-level word processing. With the SSD, there are still random pauses, but they are negligible in duration. The Pi is in a rather nice case from Pi Hut, held with the SSD in ...

Pusan National University in Korea is increasing the efficiency of solar cells by bouncing heat back into the sky. “Standing in the sun all day, solar cells often become very heated,” according to the university. “Over time, this degrades them and lowers their power-conversion efficiency. Integrating radiative coolers can solve this problem without energy consumption.” The Prusan cells are being ...

Distributor New Yorker Electronics is stocking IP68-rated cooling fans from Orion Fans’ Harsh Environment AC and DC Fan Series. “Offered in a variety of frame sizes, the IP68 rating ensures that the motor has complete protection from dust and other particles and can be completely submerged in water of depths up to three meters,” according to New Yorker. Applications are ...