Jet-film contact devices for heat and mass transfer processes in heat power engineering

3rd International Scientific and Technical Conference “Energy Systems”

Dmitriev, A.V.^1 ; Khafizova, A.I.^2 ; Dmitrieva, O.S.^3

Department Teoretical Foundations of Heat Engineering, Kazan State Power Engineering University, Krasnoselskaya St. 51, Kazan

420066, Russia^1

Department of Food Production Equipment, Kazan National Research Technological University, Karl Marx St. 68, Kazan

420015, Russia^2

Department of Chemical Technology Processes and Apparatus, Kazan National Research Technological University, Karl Marx St. 68, Kazan

420015, Russia^3

关键词: Circulating waters;    Engineering methods;    Heat and mass transfer process;    Liquid and gas phasis;    Liquid entrainment;    Numerical calculation;    Production process;    Specialized software;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/552/1/012002/pdf
DOI  :  10.1088/1757-899X/552/1/012002

来源: IOP

【 摘 要 】

One of the main production processes for many branches of industry is cooling of recycled\circulating water, which takes place in the cooling towers. The most important parameter to determine the cooling efficiency of water in the cooling tower is the contact surface of air and water. The existing designs of contact devices are highly effective in cooling the liquid, but they are complex to manufacture and expensive. In this regard, a new design of the jet-film contact device was developed, which allows creating a highly developed contact surface of liquid and gas phases. Mathematical model of the element of jet-film contact device was built by means of specialized software package and numerical calculations were carried out. Paper includes the study of behaviour of liquid and gas phases in the device element, and the mathematical dependences were obtained. Dependency of the liquid entrainment from device when changing the water flow rate was studied. Also, the comparison of designs with different location of holes within the wall elements was also carried out. Modernization of the studied jetfilm contact device was carried out in order to identify the direction which to follow for improvement of design properties. This paper proposes an engineering method for calculating the jet-film contact device.