Study on the heat transfer characteristics of a shell-and-tube phase change energy storage heat exchanger

In the present work, the phase change energy storage heat exchanger in thermal control system of short-time and periodic working satellite payloads is taken as the research object. Under the condition of constant heated power of the satellite payload, the heat transfer characteristics of phase change energy storage heat exchanger are analyzed by numerical simulation and experimental method. The heat exchanger with fin arrays to enhance heat transfer is filled with tetradecane, whose density varies with temperature. The flow field distribution, the solid-liquid distribution, the temperature distribution, and the phase change process in the plate phase change energy storage heat exchanger unit are analyzed. The flow and heat transfer characteristics of heat exchangers under different fluid-flow rates and temperature were investigated.

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An experimental investigation of heat transfer characteristics of water based Al2O3 nanofluid operated shell and tube heat exchanger with air bubble injection technique

International Journal of Engineering & Technology ◽

10.14419/ijet.v6i4.7881 ◽

2017 ◽

Vol 6 (4) ◽

pp. 83 ◽

Cited By ~ 6

Author(s):

Gaurav Thakur ◽

Gurpreet Singh

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Al2o3 Nanoparticles ◽

Air Bubbles ◽

Heat Transfer Characteristics ◽

Tube Heat Exchanger ◽

Air Bubble ◽

Transfer Characteristics ◽

Water Based ◽

Shell And Tube

The thermal performance of shell and tube heat exchangers has been enhanced with the use of different techniques. Air bubble injection is one such promising and inexpensive technique that enhances the heat transfer characteristics inside shell and tube heat exchanger by creating turbulence in the flowing fluid. In this paper, experimental study on heat transfer characteristics of shell and tube heat exchanger was done with the injection of air bubbles at the tube inlet and throughout the tube with water based Al2O3 nanofluids i.e. (0.1%v/v and 0.2%v/v). The outcomes obtained for both the concentrations at two distinct injection points were compared with the case when air bubbles were not injected. The outcomes revealed that the heat transfer characteristics enhanced with nanoparticles volumetric concentration and the air bubble injection. The case where air bubbles were injected throughout the tube gave maximum enhancement followed by the cases of injection of air bubbles at the tube inlet and no air bubble injection. Besides this, water based Al2O3 nanofluid with 0.2%v/v of Al2O3 nanoparticles gave more enhancement than Al2O3nanofluid with 0.1%v/v of Al2O3 nanoparticles as the enhancement in the heat transfer characteristics is directly proportional to the volumetric concentration of nanoparticles in the base fluid. The heat transfer rate showed an enhancement of about 25-40% and dimensionless exergy loss showed an enhancement of about 33-43% when air bubbles were injected throughout the tube. Moreover, increment in the heat transfer characteristics was also found due to increase in the temperature of the hot fluid keeping the flow rate of both the heat transfer fluids constant.

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Numerical Study of Heat Transfer Characteristics in Shell-and-Tube Heat Exchanger

Numerical Heat Transfer and Fluid Flow - Lecture Notes in Mechanical Engineering ◽

10.1007/978-981-13-1903-7_43 ◽

2018 ◽

pp. 375-383 ◽

Cited By ~ 1

Author(s):

Ravi Gugulothu ◽

Narsimhulu Sanke ◽

A. V. S. S. K. S. Gupta

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Numerical Study ◽

Heat Transfer Characteristics ◽

Tube Heat Exchanger ◽

Transfer Characteristics ◽

Shell And Tube

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Numerical Investigation on Heat Transfer of Al2O3/Water Nanofluid in a Shell and Tube Heat Exchanger

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.591.3 ◽

2014 ◽

Vol 591 ◽

pp. 3-6

Author(s):

M. Raja ◽

R. Vijayan ◽

R. Vivekananthan ◽

M.A. Vadivelu

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

Heat Exchanger ◽

Numerical Investigation ◽

Volume Concentration ◽

Heat Transfer Characteristics ◽

Tube Heat Exchanger ◽

Transfer Characteristics ◽

Shell And Tube ◽

Suspended Nanoparticles

In the present work, the effect of nanofluid in a shell and tube heat exchanger was studied numerically. The effects of Reynolds number, volume concentration of suspended nanoparticles on the heat transfer characteristics were investigated using CFD software. Finally, the effect of the nanofluid on Shell and tube heat exchanger performance was studied and compared to that of a conventional fluid (i.e., water).

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