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Jul 09, 2021 - 07:53 PM
That is correct, 2-phase cooling can remove a lot of heat by evaporation, but it has an upper limit where the evaporation occurs so quickly that a gas layer is created between the chip die and the coolant. In this instant the temperature of the die will rapid accelerate as the cooling function brakes down and runaway temperatures take place causing the chip to fail due to thermal overload.
In the instance of single phase cooling this evaporation layer never occurs and with our Dielectric Coolants like BitCool and ElectroCool you can constantly increase the flow rate to remove more heat. Keep in mind that heat is just a form of energy so you can either transfer it to another material or convert its form (thermal to kinetic to electrical in the instance of Rankin Cycle driven electrical generators). So you must continuously flow the coolant past the chips and the heat sink simply provides a great surface area for which the energy transfer can take place.
The problem with all grease based TIMs is that it will degrade in our Dielectric Coolants, so we recommend that you replace the TIM early in the use cycle, but we also have a lot of customers that simply immerse the device and wait to see if the temperature of the chip spikes due to the TIM leaching out.
In the instance of single phase cooling this evaporation layer never occurs and with our Dielectric Coolants like BitCool and ElectroCool you can constantly increase the flow rate to remove more heat. Keep in mind that heat is just a form of energy so you can either transfer it to another material or convert its form (thermal to kinetic to electrical in the instance of Rankin Cycle driven electrical generators). So you must continuously flow the coolant past the chips and the heat sink simply provides a great surface area for which the energy transfer can take place.
The problem with all grease based TIMs is that it will degrade in our Dielectric Coolants, so we recommend that you replace the TIM early in the use cycle, but we also have a lot of customers that simply immerse the device and wait to see if the temperature of the chip spikes due to the TIM leaching out.
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