Browsing by Author "Cheng, WY"

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Evaporation of R-22 in a 7-mm microfin tube
(1995)
Kuo, CS
;
Wang, CC
;
Cheng, WY
;
Lu, DC
;
機械工程學系
Film condensation of HCFC-22 on horizontal enhanced tubes
(1996-01-01)
Cheng, WY
;
Wang, CC
;
Hu, YZR
;
Huang, LW
;
機械工程學系
Experiments were conducted to study the condensation heat transfer characteristics of horizontal enhanced tubes. In the current experiment, six different enhanced tubes, including 26, 40 fpi low fin tubes and four three-dimensional-fin tubes, were tested. The working fluid used in the experiment was HCFC-22. Data were presented in the form of overall heat transfer coefficient at three working pressures, namely 1.32, 1.47 and 1.62 Mpa. In addition, the condensing heat transfer coefficients for the test tubes were obtained from the Wilson plot technique.
Measurement of hyperfine splitting of molecular iodine at 532 nm by double-passed acousto optic modulator frequency shifter
(2006-04-01)
Fang, HM
;
Wang, SC
;
Liu, LC
;
Cheng, WY
;
Wu, KY
The hyperfine splitting of molecular iodine R(56) 32-0 transition at 532 nm is measured using a double-passed acousto optic modulator frequency shifting apparatus. Preliminary results, compared with the values recommended by the Consultative Committee for Length, show that the accuracy of our method is better than 20 kHz, which can be easily improved in the future.