Abstract
The use of air conditioning in heating ventilating and air-conditioning (HVAC) industry has risen steadily over the last few decades. The goal of the system is to provide a comfortable indoor environment by the process of removal or addition of heat. There are various systems and components which have been in constant use over the years and have evolved with the needs of the user and the environment too. In this research paper attempt have been made to study microchannel heat exchangers in condenser section of package units. The idea is to see how an increase in cross-sectional area through the microchannel increases the area of heat transfer. The effect of grooved cross-section which results in increase of rate of cooling for a fluid flowing through the channel have been studied. R-32 (Freon Refrigerant) is considered as refrigerant along with water for the study using CFD analysis. Two designs were considered for the study considering circular cross section and the grooved cross section considering the channel geometry. From the results of CFD analysis, it can be stated that grooved cross section has performed better in terms of heat transfer and temperature drop as compared to circular cross section.
Highlights
Microchannel heat exchangers (MCHE) have been in use in different industries for decades
Ravigururajan [6] have studied the microchannel surfaces which are employed in high heat flux applications
Koichiro et al [7] have studied the performance of micro channel heat exchanger on heat transfer behavior and pressure loss. They studied the heat transfer considering silicon chip microchannel and the pressure was compared with the analytical results using three dimensional numerical simulations. They concluded that the microchannel heat exchanger system is sufficient to cool the silicon chip and the system they developed is
Summary
Microchannel heat exchangers (MCHE) have been in use in different industries for decades now. Zeynep and Nezaket [16] have studied the cross flow microchannel heat exchanger made of aluminum material considering square microchannels They have developed the experimental setup to perform fluid flow and heat transfer measurements. Tri et al [18] have studied microchannel heat exchanger with S-shaped fins using CFD fluent code to confirm simulation results of thermal hydraulic performance in case of carbon dioxide loop to study the pressure drop made of s-shaped fins and to compare with the conventional with zigzag films. They concluded that the experimental results were in line with the standard deviation of 13 to 16 percent. In this research work attempt have been made to study microchannel heat exchanger considering circular and grooved cross section geometry
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