+ ∆ p: pressure loss along the road in the cold channel. + g: coefficient of gravity, g = 9.81 (m/s2). + L: the total length of the cooling channel. + D: cold channel diameter. + ʎ: coefficient of loss. -Pressure loss along the road in the cold channel (∆ p): pressure loss along the road in the cold channel is defined as follows: + ∆ p = Pv-Pr + Pv, PR: pressure on and the pressure out of the cooling system.
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