Heat transfer coefficient

Engineering

Heat transfer

Materials science

Heat transfer enhancement

Moving bed heat exchanger

Heat exchanger

Plate heat exchanger

Mechanical engineering

Thermodynamics

Physics

Pressure drop

Shell and tube heat exchanger

Nanofluid

Mechanics

Micro heat exchanger

Plate fin heat exchanger

Energy Conversion and Management

• A brief review on application of nanofluid in heat exchangers. • Presenting a review on nanofluids and their simulation methods. • Presenting studies on different heat exchangers including: plate, helical, shell and tube and double-tube. • Trying to understand the mechanisms of heat transfer in the field of using nanofluids in heat exchangers. • Nanofluids reduce volume of heat exchangers and improve saving energy. In this paper a brief review on application of nanofluids in heat exchangers has been addressed. One of the barriers to increase the capacity of different industries is the lack of response of heat devices in higher capacities. In addition, increasing capacity leads to an increase in pressure drop and this is one of the most important restrictions on the large industries. Conventional methods of increasing heat transfer greatly increase the pressure drop, and according to the results of previous studies, using the special nanofluids, the thermal efficiency of the heat exchanger can be increased significantly, which is one of the most important thermal devices in the industry. In this research, firstly a review of nanofluids studies and introduction of nanofluids is presented, then their simulation methods are investigated, and finally, studies on the used tubes in the heat exchangers have been investigated, and studies of the plate heat exchanger, helical heat exchanger, shell and tube heat exchanger, and double-tube heat exchanger have been examined. The enhancement of thermal and hydraulic performance of heat exchangers is very important in terms of energy conversion, and also is important in the economic recovery of systems through savings. This paper examines previous studies on heat exchangers and using of nanofluids in them. The purpose of the paper is not only to describe the previous studies, but also to understand the mechanisms of heat transfer in the field of using nanofluids in heat exchangers, and also to evaluate and compare different heat transfer techniques. Finally, it can be concluded that the nanofluids in most cases improve heat transfer, which reduce the volume of heat exchangers, saving energy, consequently water consumption and industrial waste.

An updated review on application of nanofluids in heat exchangers for saving energy