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Performance Characteristics of a Hybrid Air-Conditioner for Telecommunication Equipment Rooms  

Kim, Yong-Chan (Department of Mechanical Engineering, Korea University)
Choi, Jong-Min (Department of Mechanical Engineering, Hanbat National University)
Kang, Hoon (IFTP, Hanbat National University)
Yoon, Joon-Sang (Graduate School of Mechanical Engineering, Hanbat National University)
Kim, Young-Bae (Graduate School of Mechanical Engineering, Korea University)
Choi, Kwang-Min (Graduate School of Mechanical Engineering, Korea University)
Lee, Ho-Seong (Graduate School of Mechanical Engineering, Korea University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.18, no.11, 2006 , pp. 874-880 More about this Journal
Abstract
The power density and heat dissipation rate per unit area of the telecommunication equipment have been increased with the technology development in the footprint of telecommunication hardware. A proper heat dissipation method from the PCB module is very important to allow reliable operation of its electronic component. In this study, a hybrid air-conditioner for the telecommunication equipment room was designed to save energy and obtain system reliability. For high outdoor temperatures, the hybrid system operates in the vapor compression cycle, while, for low outdoor temperatures, the hybrid system works in the secondary fluid cooling cycle with no operation of the compressor. The performance of the hybrid air-conditioner was measured by varying outdoor and indoor temperatures. The hybrid air-conditioner yielded 50% energy saving compared with the conventional refrigeration system when the mode switch temperature was $8.3^{\circ}C$.
Keywords
Hybrid air-conditioner; Heat density; Telecommunication equipment; Cooling;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Schmidt, R R and Shaukatullah, H., 2003, Computer and telecommunications equipment room cooling, A review of literature, IEEE Transactions on Components and Packaging Technologies, Vol. 26, No.1, pp.89-98   DOI   ScienceOn
2 Cinato, P., Bianco, c. Licciardi, L., Pizzuti, F., Antonetti, M. and Grossoni, M., 1998, INTELEC, pp.770-776
3 ANSI, 1985, Laboratory methods of testing fans for rating, ANSI/AMCA 210, Arington (VA)
4 Yun, R, Kim, Y. C., Kim,. H., Choi, J, M. and Cheon, D. K, 2006, Optimum design of liquid cooling. heat exchangers and cooling-fluid distributors for a amplifier of telecommunication' equipment, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 18, No.1, pp.24-30   과학기술학회마을
5 Noh, H. K, Song, K S. and Chun, S. K, 1998, The cooling characteristics on the air supply and return flow system in the telecommunication cabinet room, INTELEC, pp.777-784
6 Hayana, H. and Nakao, M., 1989, Cooling data and dot-coms, Consulting-Specifying Engineering, Vol. 29, No.1, pp.28-36
7 Baer, D. B., 2001, Emerging cooling requirements & systems in telecommunications spaces, INTELEC, pp. 95-100
8 Kim, W. T., Song, K S. and Lee, Y, 1998, Design of a two-phase loop thermosyphone for telecommunication system(ll), KSME International Journal, Vol. 12, pp.942-955   DOI
9 Kim, W. T. and Kim, K. S., 1996, Forced convective cooling characteristics with stacked modules of multi-PCB's in telecommunication cabinet, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 8, No.2, pp. 230-239
10 Ha, S.J., Kim, T. H., Yang, T.J. and Kim, J. S., 2004, Development : of cooling system for electronic 'devices using oscillating capillary tube heat pipe, Proceedings of the SAREK, pp.869-874
11 Lee, H., Jeong, Y, Shin, J' Kang, M. and Chun, K, 2004, Package embedded heat exchanger for stacked multi-chip module, Sensors and actuators, Vol. 114, pp.204-211   DOI   ScienceOn
12 ASHRAE, 1983, Methods of testing. for seasonal efficiency of unitary air-conditioners and heat pumps, ASHRAE Standard 116, Atlanta (GA)