| Effects of the longitudinal chains on thermal performance of a double pipe heat exchanger, An Experimental Effort |
| کد مقاله : 1163-FDC |
| نویسندگان |
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محمد جعفری * هیئت علمی گروه مهندسی مکانیک دانشگاه لرستان |
| چکیده مقاله |
| The effects of a number of longitudinal chains soldered on the inner tube of a double pipe heat exchanger on its thermal performance are investigated experimentally. The chains have been made of a copper wire with 1mm diameter. Each circle of the chain has 3 mm internal diameter. The heat exchanger has an inner copper tube with 16 mm outer diameter and 1mm thickness when the outer pipe has 40 mm inner diameter. The study was carried out when the Reynolds number of the hot fluid flow passing in the inner tube was 4000 when the Reynolds number of cold fluid passing through the annulus area were changed from 3000 to 6000. The results showed that the usage of the longitudinal chains leads to a noticeable growth in the overall heat transfer of the heat exchanger from 10 to 40 %. On other side, the results also represented an increase of the pressure loss in the outer tube, resulting an increase in the friction factor from 8 to 35 % based on the Reynolds number and number of the used chains. |
| کلیدواژه ها |
| Double Pipe Heat Exchanger, Longitudinal Chain, Thermal Performance |
| وضعیت: پذیرفته شده |