Machine learning technology in biodiesel research: A review

Waste to energy: Production of waste tire pyrolysis oil and comprehensive analysis of its usability in diesel engines

Effect of turbulator modifications on the thermal performance of cost-effective alternative solar air heater

Investigation of the effects of biodiesel/2-ethylhexyl nitrate (EHN) fuel blends on diesel engine performance and emissions by response surface methodology (RSM)

Engine performance and emission characteristics of palm biodiesel blends with graphene oxide nanoplatelets and dimethyl carbonate additives.

Impact of various metal-oxide based nanoparticles and biodiesel blends on the combustion, performance, emission, vibration and noise characteristics of a CI engine

Energy efficiency becomes one of the most attracting study areas in the world because of the rising environmental issues. It is widely known that a plenty of energy efficiency applications are performed in heat transfer devices. In this regard, it is aimed to improve the thermal performance of recuperator, an air–air heat exchanger, including heat pipe bundle by utilizing a nanofluid, which is the mixture of nanoparticles of a metal oxide and deionized water, by this experimental study. The tests were conducted by filling the heat pipe at the rate of 1/3 of heat pipe volume both deionized water and alumina nanofluid, respectively. Coolant air was used to determine how much heat could be extracted from the condenser section. The findings obtained from the tests show that thermal performance of a heat pipe bundle-including recuperator was remarkably enhanced when nanoparticles containing working fluid was used as the working fluid in place of deionized water. The maximum improvement was achieved as 37.04% during the tests conducted at 6 kW heater power.

Influences of alumina and fly ash nanofluid usage on the performance of recuperator including heat pipe bundle

This paper deals with the improvement of thermal performance of the heat recovery system in air-to-air unit by using a nanofluid of TiO particles and distilled water. The 2 experimental set-up equipped with 15 copper pipes of a 1000 mm length, 10.5 mm inner diameter, and 12 mm outer diameter was used. 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 volumes of heat pipes were filled with working fluids. Experiments were carried out at temperatures between 25oC and 90oC by using five different cooling air-flows (40, 42, 45, 61, and 84 g/s), and two different heating powers (3 kW and 6 kW) for the evaporation section, to determine heat removed from the condensation section. Trials were performed for distilled water and nanofluid respectively, and the results were compared with each other. Results revealed that a 50% recovery in the thermal performance of the heat pipe heat recovery system was achieved in the design using TiO nanofluid as the working liquid, at a heating power of 3 kW, air 2 velocity of 2.03 m/s and air-flow of 84 g/s.

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Performance improvement of the heat recovery unit with sequential type heat pipes using TiO2 nanofluid

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Design and manufacture of a new two axes welding seam tracking system using laser sensor fuzzy logic control

The purpose of this study is to improve the thermal performance of air-to-air heat recovery units containing heat pipes and utilizing single Al2O3/EG and TiO2/EG and hybrid Al2O3 + TiO2/EG (50:50) nanofluids as various working fluids. In the experimental setup, 15 wickless and vacuumed copper pipes with a length of 100 cm, an inner diameter of 10.5 mm, and an outer diameter of 12 mm were used. Heat pipe portions of 450 mm, 400 mm, and 150 mm constitute the evaporator zone, condenser zone, and the adiabatic zone, respectively. In the experimental studies, 1/3 of the evaporator volumes of the heat pipes were filled with working fluids. The experiments were conducted by applying three different heating powers (500 W, 1000 W, and 1500 W) to the evaporator section and three different air mass flow rates (m1 = 125 g/s, m2 = 175 g/s, and m3 = 215 g/s) to the condenser section. The values of thermal efficiency and thermal resistance were calculated to compare the values of single and hybrid nanofluids utilized in the system. The results indicated that single and hybrid nanofluids are more efficient than EG under all different conditions. A maximum efficiency of 82% was acquired at 1500 W and a mass flow rate of m3 = 215 g/s by utilizing the hybrid nanofluids Al2O3 + TiO2/EG (50:50). Furthermore, it was observed all the nanofluids facilities reduced thermal resistance of heat pipes. This thus generated an improvement in the quantity of heat transfer. Under 1500 W and m3 = 215 g/s mass flow rate conditions a maximum of 53.71% reduction in thermal resistance was also achieved by means of hybrid nanofluids. 

Ahmet Öztürk

Papers

Impact of various metal-oxide based nanoparticles and biodiesel blends on the combustion, performance, emission, vibration and noise characteristics of a CI engine

Influences of alumina and fly ash nanofluid usage on the performance of recuperator including heat pipe bundle

Performance improvement of the heat recovery unit with sequential type heat pipes using TiO2 nanofluid

Design and manufacture of a new two axes welding seam tracking system using laser sensor fuzzy logic control

AN EXPERIMENTAL STUDY ON THE THERMAL EFFICIENCY OF AN AIR-TO-AIR HEAT EXCHANGER WITH ETHYLENE GLYCOL (EG)-BASED HYBRID NANOFLUID Al2O3 + TiO2