Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
APPLICATION OF PERIPHERAL FINS IN A VARIABLE-SPEED AIR CONDITIONER
Submission Author:
Guilherme Borges Ribeiro , SP , Brazil
Co-Authors:
Guilherme Borges Ribeiro
Presenter: Guilherme Borges Ribeiro
doi://10.26678/ABCM.ENCIT2018.CIT18-0050
Abstract
In air-conditioning applications, the used of hydrocarbons refrigerants as Propane (R-290) has growth extensively in the last years, due to more restricted regulations regarding the power consumption and the environmental. Hence, this paper proposes a numerical evaluation of a condenser that makes use of peripheral fins on a split-type air-conditioning system. The heat exchanger tube length was part of the evaluation, while three other types of fins were also simulated for comparison purposes: plain, wavy and louvered fins. In order to assess the system performance, the SEER rating computed in accordance with the AHRI 210/240 was included. Additionally, the system cooling capacity, the condenser thermal conductance and the system refrigerant charge were part of the analysis. As a manner to enhance the numerical evaluation, the Oil Circulation Ratio (OCR) of the system was estimated and the presence of the lubricating oil POE ISO 22 mixed with R-290 was taken into account on the thermophysical properties and correlations. Results have shown that for the simulated range, heat exchangers with peripheral fins provided higher thermal conductance (UA), SEER and cooling capacities than other types of fins. When the available heat transfer area is constrained in the peripheral fin condenser, cooling capacities similar to the other fins were achieved, with a strong decrease of the refrigerant charge.
Keywords
peripheral fin, air conditioning, SEER, variable-speed
