Author:
Belyaev Aleksandr V.,Dedov Alexey V.,Sidel’nikov Nikita E.,Jiang Peixue,Varava Aleksander N.,Xu Ruina
Abstract
This work aimed to study the intensification of flow boiling heat transfer and critical heat flux (CHF) under conditions of highly reduced pressures due to a modification of the inner wall surface of a mini-channel. Such research is relevant to the growing need of high-tech industries in the development of compact and energy-efficient heat exchange devices. We present experimental results of the surface modification effect on hydrodynamics and flow boiling heat transfer, including data on the CHF. A description of the experimental stand and method for modifying the test mini-channel is also presented. The studies were carried out with freon R-125 in a vertical mini-channel with a diameter of 1.1 mm and a length of 50 mm, in the range of mass flow rates from G = 200 to 1400 kg/(m2s) and reduced pressures between pr = p/pcr = 0.43 and 0.56. The maximum surface modification effect was achieved at a reduced pressure of pr = 0.43, the heat transfer coefficient increased up to 110%, and the CHF increased up to 22%.
Subject
Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry
Reference33 articles.
1. Li, Y., Wang, Q., Li, M., Ma, X., Xiao, X., and Ji, Y. (2022). Investigation of Flow and Heat Transfer Performance of Double-Layer Pin-Fin Manifold Microchannel Heat Sinks. Water, 14.
2. Kumar, S.R., and Singh, S. (2022). Experimental Study on Microchannel with Addition of Microinserts Aiming Heat Transfer Performance Improvement. Water, 14.
3. Heat transfer enhancement at boiling and evaporation of liquids on modified surfaces-a review;Volodin;Teplofizika Vysokikh Temperatur,2021
4. Fujikake, J. (1980). 1980 Heat Transfer Tube for Use in Boiling Type Heat Exchangers and Method of Producing the Same. (4216826), U.S. Patent.
5. Obtaining subsurface cavities by deforming cutting to intensify bubble boiling;Zubkov;Vestn. Mashinostr.,2014
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