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## Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers

#### Ahmet ÖZTÜRK [1] , Mehmet ÖZALP [2] , Adnan SÖZEN [3]

##### 90 219

This study investigates the thermal performance of a heat pipe heat recovery system in air-to-air heat recovery systems using a nanofluid of Al2O3 (aluminum oxide) particles and distilled water. The experimental setup used 15 wickless vacuumed copper pipes with a length of 1000 mm, a 10.5 mm inner diameter and a 12 mm outer diameter. The evaporator section consists of 450 mm of heat pipes, the condenser section is 400 mm, and the adiabatic section is 150 mm. In experimental studies, 33% of the evaporator volume of the heat pipes was filled with working fluids. Experiments were carried out at temperatures between 25ºC and 90ºC by using five different cooling air flows (40 g/s, 42 g/s, 45 g/s, 61 g/s and 84 g/s), and two different heating powers (3 kW and 6 kW) for the evaporation section, to determine the heat removed from the condensation section. Experiments were performed for distilled water and Al2O3 nanofluid, respectively, and the results were compared with each other. As a result of the experiments, it was observed that using a nanofluid as the working fluid increased the efficiency of the heat pipe. The highest efficiency (η = 59%) was obtained in the experiments carried out using an Al2O3 nanofluid at a heating power of 3 kW and an air flow of 112 g/s.

Aluminum oxide, heat pipe, heat recovery, nanofluid
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Primary Language en Engineering Mechanical Engineering Author: Ahmet ÖZTÜRKInstitution: Artvin Çoruh University, Artvin Vocational School, Machine Part, Artvin, TurkeyCountry: Turkey Author: Mehmet ÖZALPInstitution: Karabük University, Engineering Faculty, Mechanical Engineering, KarabükCountry: Turkey Author: Adnan SÖZENInstitution: Technology Faculty, Energy Systems Engineering, Gazi University, 06500 AnkaraCountry: Turkey
 Bibtex @research article { gujs330984, journal = {GAZI UNIVERSITY JOURNAL OF SCIENCE}, issn = {}, eissn = {2147-1762}, address = {Gazi University}, year = {2018}, volume = {31}, pages = {616 - 626}, doi = {}, title = {Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers}, key = {cite}, author = {ÖZTÜRK, Ahmet and ÖZALP, Mehmet and SÖZEN, Adnan} } APA ÖZTÜRK, A , ÖZALP, M , SÖZEN, A . (2018). Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers. GAZI UNIVERSITY JOURNAL OF SCIENCE, 31 (2), 616-626. Retrieved from http://dergipark.gov.tr/gujs/issue/37206/330984 MLA ÖZTÜRK, A , ÖZALP, M , SÖZEN, A . "Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers". GAZI UNIVERSITY JOURNAL OF SCIENCE 31 (2018): 616-626 Chicago ÖZTÜRK, A , ÖZALP, M , SÖZEN, A . "Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers". GAZI UNIVERSITY JOURNAL OF SCIENCE 31 (2018): 616-626 RIS TY - JOUR T1 - Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers AU - Ahmet ÖZTÜRK , Mehmet ÖZALP , Adnan SÖZEN Y1 - 2018 PY - 2018 N1 - DO - T2 - GAZI UNIVERSITY JOURNAL OF SCIENCE JF - Journal JO - JOR SP - 616 EP - 626 VL - 31 IS - 2 SN - -2147-1762 M3 - UR - Y2 - 2018 ER - EndNote %0 GAZI UNIVERSITY JOURNAL OF SCIENCE Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers %A Ahmet ÖZTÜRK , Mehmet ÖZALP , Adnan SÖZEN %T Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers %D 2018 %J GAZI UNIVERSITY JOURNAL OF SCIENCE %P -2147-1762 %V 31 %N 2 %R %U ISNAD ÖZTÜRK, Ahmet , ÖZALP, Mehmet , SÖZEN, Adnan . "Experimental Investigation of an Al2O3 / Distilled Water Nanofluid Used In the Heat Pipes of Heat Exchangers". GAZI UNIVERSITY JOURNAL OF SCIENCE 31 / 2 (June 2018): 616-626.