Abstract
As a main component in a refrigeration system, finned-tube CO2 gas cooler plays an important role to the system performance and thus needs to be thoroughly investigated. To achieve this, some effective parameters including the CO2 and air fluid velocityfields, temperature profiles and heat transfer characteristics at different operating conditions are predicted and analysed by means of Computational Fluid Dynamics (CFD) modelling and simulation. It is noted that CFD modelling can accurately obtain the localheat transfer coefficients of both air and refrigerant sides, which are difficult to be predicted by conventional empirical correlations. This paper investigates the effect of varied operational parameters on local heat transfer coefficients and temperature profiles of the working fluids in a finned-tube CO2 gas cooler by means of CFD modelling. As one of the simulation results, it is found that the approach temperature decreases with increased air inlet velocity. The model has been compared and validated with experimental measurements and literature correlations. The research methods and outcomes can be used for further investigation and optimization in this area
| Original language | English |
|---|---|
| Pages (from-to) | 275-282 |
| Journal | Energy procedia |
| Volume | 161 |
| DOIs | |
| Publication status | Published - 18 Mar 2019 |
| Event | 2nd International Conference on Sustainable Energy and Resource Use in Food Chains: ICSEF 2018 - Paphos, Cyprus Duration: 17 Oct 2018 → 19 Oct 2018 Conference number: 2nd |
Keywords
- CO2 finned-tube gas cooler
- heat transfer coefficient
- refrigeration system
- Computational Fluid Dynamics (CFD)