Abstract
In this article we present an inclusive review of research carried out in the field of phase change heat transfer enhancement. First, we discuss about different kinds of conventional heat transfer enhancement techniques performed in convection heat transfer related heat exchangers. Next, we present the advantages of implementing phase change heat transfer and report a brief introduction to the physics behind the phase change (boiling) heat transfer phenomenon. We present a well explained data about different kinds of enhancement techniques using micro and nano scale structures on heat transfer surface/device to increase the limit of boiling heat transfer. The entire review article is broadly divided into two categories: first the investigation related to fluid flow or transport mechanism over the micro/nano structured surface which is of crucial importance, second is the actual computational and experimental methods to achieve higher heat transfer capability in terms of critical heat flux (CHF) for a given surface/device. From the ongoing work, we are able to conclude and put forward three major stages of doing research in CHF enhancement using micro/nano structures/devices viz.: (i) selection and construction of micro/nano structures, (ii) perceiving the fluid transport through capillary over the micro/nano structured surface and (iii) actual experiment/computation to compare CHF of modified device with the base device.
Highlights
Heat transfer enhancement has become an immense topic of discussion in the last few decades
After reviewing different research articles in the field of heat transfer enhancement, especially one with phase change, we come to a major conclusion that critical heat flux (CHF) enhancement is due to surface modification of heat transfer device
The process of enhancing the heat transfer capability by raising CHF to higher value is to be studied in three steps: (i) selection of proper micro or nano scale structures to be built over the heat transfer device (ii) study of fluid transport over that modified surface with micro/nano structures and (iii) actual experiment or computational analysis for CHF enhancement on the new device
Summary
Heat transfer enhancement has become an immense topic of discussion in the last few decades. Enhancement techniques are adopted in order to increase the limit of heat transfer capability as well as to eliminate the undesirable loss of energy/heat to the surrounding. It has been a practice of selecting materials with good thermal properties to be used in heat transfer devices which helps a lot for better heat conduction in a wide range of applications. If we discuss about convection mode of heat transfer, it is well known that, thermal boundary layer is a major hindrance for efficient heat exchange. Numerous experimental and theoretical works have been carried out to destroy or postpone the thermal boundary layer formation on such heat transfer surfaces with an intention of acquiring an enhanced. We perform the inclusive review of different research activities related to the devices with enhanced heat transfer capability and put forward the major findings of each one of them which will be of great aid to carry out future research in this area
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