Experimental investigation of surface temperature non-uniformity in spray cooling

An experimentally-verified temperature control simulation model for spray evaporative cooling of vibrating powertrain parts

“…dissipate heat flux in the range 1.5 -2 MW/m 2 , while the temperature needs to be kept below the silicon transistor limit (~ 150 ˚C) and above a lower operating temperature limit. Spray evaporative cooling actually provides a uniform temperature across all cooled surfaces [28], eliminating hot spots. This is important for thermal management of Lithium-ion battery stacks [29] to protect against overheating [30,31] and fires [32] because exceeding the upper limit risks thermal runaway whereas operating under the lower limit, reduces cell life.…”

The Simultaneous Analysis of Droplets’ Impacts and Heat Transfer during Water Spray Cooling Using a Transparent Heater

“…HTC ∼ q 0.6−0.8 . (12) Such similarity in the description of these two processes argues in favour of the hypothesis that the physical mechanisms of spray cooling and nucleate boiling are generally similar. In particular, the main contribution to heat transfer during spray cooling, like bubble formation for boiling, is provided by the droplet impact on the liquid film.…”

“…In the overwhelming majority of experimental studies, measurements of thermal characteristics are carried out using thermocouples and local temperature sensors with low temporal and spatial resolutions. At the same time, as the results of a number of works show, the temperature field of a heater during spray cooling can be non-uniform depending on the irrigation mode [12]. General data do not allow to obtain information on the local unsteady characteristics of heat transfer and to assess their contribution to integral heat transfer.…”

Temperature control of vibrating heat-generating hardware using spray evaporative cooling in the nucleate boiling region

“…Evaporative spray cooling should meet this challenge, moreover its two-phase flow helps to eliminate hot spots, by providing a uniform temperature across all cooled surfaces [24]. Uniform temperature is vital in the thermal management of electronic hardware and Lithium-ion battery stacks [29], where there is risk of overheating [30,31] and fires [32]. Further applications include indirect cooling, using pre-cooled air, which improves thermal performance of lithium battery packs [33].…”