| Title |
Experimental Investigation on the Performance of a Scroll Expander for an Organic Rankine Cycle |
| Authors |
성민제(Min-Je Sung) ; 안준(Joon Ahn) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.4.158 |
| Keywords |
유기랭킨사이클 ; 주전열면 열교환기 ; 채널주름비 ; 마찰계수 ; 누셀트수 ORC ; Primary surface heat exchanger ; Amplitude ratio ; Friction factor ; Nu |
| Abstract |
A series of numerical simulation has been carried out to study thermo-hydraulic characteristics of a primary surface type heat exchanger, which is designed for the evaporator and condenser of a geothermal ORC. Working fluid is geothermal water at hot side and R-245fa, which is a refrigerant designed for ORC, at cold side. Amplitude ratio of the channel and Reynolds number are considered as design parameters. Nusselt number is presented for the Reynolds number ranging from 50 to 150 and compared to analytic solutions. The result shows that higher amplitude ratio channel gives better heat transfer performance within the range of investigation. |