Energy efficiency of pulsating flows at heat-transfer enhancement in a shell-and-tube water oil cooler

International Scientific-technical Conference on Innovative Engineering Technologies, Equipment and Materials 2017

工业技术;机械制造;材料科学

Haibullina, A.I.^1 ; Sabitov, L.S.^1,2 ; Hayrullin, A.R.^1 ; Ilyin, V.K.^1

Kazan State Power Engineering University, 51 Krasnoselskaya street, Kazan

420066, Russia^1

Kazan Federal University, 18 Kremlyovskaya street, Kazan

420008, Russia^2

关键词: Heat Transfer enhancement;    Hydraulic cylinders;    Hydraulic system;    Outside diameter;    Pulsating flow;    Relative amplitude;    Shell-and-tube;    Shell-side flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/412/1/012026/pdf
DOI  :  10.1088/1757-899X/412/1/012026

来源: IOP

【 摘 要 】

In this paper the energy efficiency of pulsating flows during of enhancement heat transfer in a shell-and-tube water oil cooler was studied. A device for enhancement heat-transfer in an oil cooler based on a hydraulic system and a hydraulic cylinder is developed. A shell side flow of the oil cooler underwent pulsating. A Reynolds number of the oil flow based on the outside diameter of the tube was Re oil = 658, a number of Prandtl Pr oil = 293. It is established that with increasing frequency and relative amplitude of pulsations, an increase in heat transfer commensurate with increasing power consumption. It is shown that the energy efficiency of asymmetric pulsations is higher in comparison with the symmetric pulsations.