Experimental investigation on performance of parallel flow three fluid heat exchanger using passive technique for heat transfer enhancement.
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| Title: | Experimental investigation on performance of parallel flow three fluid heat exchanger using passive technique for heat transfer enhancement. |
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| Authors: | Ahamad, Sakeel1 (AUTHOR) sakeel5600@gmail.com, Verma, Suresh Kant1 (AUTHOR) |
| Source: | Experimental Heat Transfer. 2026, Vol. 39 Issue 3, p269-292. 24p. |
| Subject Terms: | *Heat exchangers, *Surface roughness, *Heat transfer coefficient, *Heat exchanger efficiency, *Nusselt number, *Pressure drop (Fluid dynamics), *Fluid flow |
| Abstract: | A three fluid heat exchanger (TFHE) having parallel flow arrangement considering relative roughness height (e/Bi) of 0.037 and 0.074 and relative roughness pitch (Ps/e) 2.5, 5, 7.5, 10, and 15 has been taken for experimentation. The Reynolds number for waste hot fluid, normal water, and air varies from 7500 -23,000, 2000–4000, and 3400 -10,500, respectively. The Nusselt number for the coil side is calculated using the traditional Wilson plot method and validated with the Nusselt number reported from literature for parallel flow arrangements. It is obtained that the maximum increment in Nu and the friction factor for the coil side is to be 50.62% and 52.38%, respectively, for the air side, the maximum increment in Nu, friction factor, TPF, overall heat transfer coefficient, and effectiveness are found to be 104.96%, 113.12%, 1.615, 69.60%, and 50.46%, respectively, at e/Bi equals to 0.074 and Ps/e equals to 2.5 as compared to the plain tube. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | A three fluid heat exchanger (TFHE) having parallel flow arrangement considering relative roughness height (e/Bi) of 0.037 and 0.074 and relative roughness pitch (Ps/e) 2.5, 5, 7.5, 10, and 15 has been taken for experimentation. The Reynolds number for waste hot fluid, normal water, and air varies from 7500 -23,000, 2000–4000, and 3400 -10,500, respectively. The Nusselt number for the coil side is calculated using the traditional Wilson plot method and validated with the Nusselt number reported from literature for parallel flow arrangements. It is obtained that the maximum increment in Nu and the friction factor for the coil side is to be 50.62% and 52.38%, respectively, for the air side, the maximum increment in Nu, friction factor, TPF, overall heat transfer coefficient, and effectiveness are found to be 104.96%, 113.12%, 1.615, 69.60%, and 50.46%, respectively, at e/Bi equals to 0.074 and Ps/e equals to 2.5 as compared to the plain tube. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 08916152 |
| DOI: | 10.1080/08916152.2025.2503881 |
