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Computerized Fluent Simulation on Earth Tube Heat Exchanger Where Air as a Flow Medium

Leena Meravi, Vikas Kesharwani

Abstract


In the present era renewable source of energy is free and abundant in nature and it must be brought into application. Due to excessive use of air conditioning systems, the chemicals cause global warming is a serious issue. The renewable energy is the main aim and objective of an earth tube heat exchanger, which uses the thermal energy of the ground for cooling and heating of the fluent. Here, Air is used as fluent. The air cools in summer and gets heated in winter due to the temperature difference between the air and underground surface temperature. Researchers have been carried out at beginning as a field investigation. But presently software simulation is used for measurement of heat transfer and temperature difference at the outlet and inlet. The software requires complex model and its dimensioning process, such a system which involves optimization of numerous parameters such as the diameter, air flow rate depth, tube length and condensation in the meantime have to be considered. ANSYS Software is being used for simulation and modeling of result. Computational fluid dynamics (CFD fluent) workbench under ANSYS software is used as simulation analysis the pipe of 45 m length, 0.004 m thickness, 0.08 m diameter and 5 m depth of pipe from the earth ground. Air velocity is considered to be 1 m/s. The inlet temperature is considered for a day of every month in a year according the previous research. Using fluent thermal variations is being analyzed. It is observed at increasing velocity increases the rate of heat transfer, mid temperature, outlet temperature varies in the year.

Keywords


Thermal, heat convection, numerical simulation, temperature, renewable energy

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References


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DOI: https://doi.org/10.37628/ijsmfe.v6i2.1136

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