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Shimadzu Review 75[3・4] (2019.1)
Abstract
This article describes two developments for a two-phase heat transfer system for aircraft. This is an advanced cooling and heat transfer technology that can be used to design more compact systems than conventional liquid cooling systems. One of the developments is an active pump system using a small pump for circulating refrigerant. The other is a loop heat pipe that circulates refrigerant with no electrical power using the capillary force of a porous material. We designed prototype systems using R245fa as a working refrigerant and conducted tests in a laboratory environment, and achieved 20 kW stable heat transfer in the active pump system and 400 W stable heat transfer in the loop heat pipe. Currently, we are conducting additional tests under simulated aircraft equipment conditions using new refrigerants such as R1224yd(Z) and R1233zd(E). We plan to complete verification of system feasibility on the ground by the end of 2019.
Keywords: Heat transfer, Two-phase, Loop heat pipe, Liquid cooling
1Research & Development Department, Aircraft Equipment Division, Shimadzu Corporation, Kyoto, Japan
2Department of Mechanical System Engineering, Nagoya University, Nagoya, Japan
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