Numerical simulation of a heat exchanger using Al2O3 nanofluid and STES

Computational Civil Engineering Conference 2019

土木建筑工程

Baran, A.I.^1 ; Mateescu, T.^1 ; Luciu, R.S.^1

Department Pf Building Services Engineering, Technical University of Iasi, Romania^1

关键词: Beneficial effects;    Convective heat transfer Coefficient;    Energy performance;    Fossil fuel savings;    Heating and cooling systems;    Multi-tubular heat exchangers;    Phase changing materials;    Renewable energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/586/1/012040/pdf
DOI  :  10.1088/1757-899X/586/1/012040

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The major energy crisis, predictable for the global economy, requires attentive research & development in order to grow energy performance, heat transfer and energy storage. It is a known fact that in the energy balance, the biggest share is in thermal energy and that justifies the continuous effort in the optimization of fossil fuel saving solutions and intense promotion of renewable energies. Use of the latter in heating and cooling systems as well as "waste heat" from different processes is consistent with the concept of sustainable development and results in reduction of conventional fuel consumption and emissions. Optimizing such a system can be made by replacing the usual storage material with phase changing materials and by using nanofluids as a secondary agent with the beneficial effect on heat transfer. In this paper we have studied a simplified multitubular heat exchanger, buried in the ground, having as a primary working fluid plain water and nanofluid, using Ansys. The nanofluid is composed of particles of A12O3 dispersed in water at a concentration of 1%. The study indicates an increase in convective heat transfer coefficient of nanofluid compared to water.