Effect of Thermal Cycling on Operational Characteristics and Lifetime Prediction of Space Pulse Tube Refrigerator

Table 4

Summary of thermal cycling test results.

Prototype	Sample	Testing	Heat reject temperature (K)		Cold-tip temperature (K)		Input electrical power (W)
		Time (h)	Preset value	Result	Requirement	Result	Requirement	Result
Type A	No. 1	16000	243∼283	241.1∼283.2	≤63	60 ± 0.2	P ≤ 80	47.02∼56.21
	No. 2	16000	243∼283	242.9∼282.7		60 ± 0.6		45.73∼54.62
Type B	No. 1	16000	243∼283	241.8∼286.4	≤83	80 ± 0.7	P ≤ 120	64.95∼97.31
	No. 2	16000	243∼283	240.2∼283.7		80 ± 0.6		67.56∼96.73