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Science and Technology for the Built Environment Volume 23, 2017 - Issue 1
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General Issue

Oil retention in a microchannel type condenser and its effects on heat transfer rate performance and on the pressure drop

Ardiyansyah Saad YatimDepartment of Mechanical Engineering, University of Indonesia, Depok, 16424, West Java, IndonesiaCorrespondence[email protected]
,
Pratik Shashikant DeokarDepartment of Mechanical Engineering, Auburn University, Auburn, AL, USA
&
Lorenzo CremaschiDepartment of Mechanical Engineering, Auburn University, Auburn, AL, USA
Pages 166-180 | Received 20 Oct 2015, Accepted 04 Apr 2016, Published online: 18 Oct 2016

Figures & data

Schematic of the experimental setup for condenser tests.
Schematic of the experimental setup for condenser tests.
Oil extraction system (left) and mass balance at the oil extractor (right, the oil extractor consisted of the two oil separators connected in series, as indicated inside the red dashed square on the left side of the figure).
Oil extraction system (left) and mass balance at the oil extractor (right, the oil extractor consisted of the two oil separators connected in series, as indicated inside the red dashed square on the left side of the figure).
Oil retention calculation: a. injection at inlet of MCHX; b. injection at outlet of MCHX.
Oil retention calculation: a. injection at inlet of MCHX; b. injection at outlet of MCHX.
Microchannel condenser specifications.
Microchannel condenser specifications.
Oil retention volume at low degree of superheat for R410A+POE oil in microchannel condenser.
Oil retention volume at low degree of superheat for R410A+POE oil in microchannel condenser.
Oil retention volume at high degree of superheat for R410A+POE oil in microchannel condenser
Oil retention volume at high degree of superheat for R410A+POE oil in microchannel condenser
Oil retention volume at high degree of inlet superheat for R134a+POE oil in microchannel condenser.
Oil retention volume at high degree of inlet superheat for R134a+POE oil in microchannel condenser.
Heat transfer factor at low degree of superheat for R410A+POE oil in microchannel condenser.
Heat transfer factor at low degree of superheat for R410A+POE oil in microchannel condenser.
Heat transfer factor at high degree of superheat for R410A+POE oil in microchannel condenser.
Heat transfer factor at high degree of superheat for R410A+POE oil in microchannel condenser.
Heat transfer factor at high degree of superheat for R134a+POE oil in microchannel condenser.
Heat transfer factor at high degree of superheat for R134a+POE oil in microchannel condenser.

Table 1 Microchannel condenser geometry.

Table 2 Test conditions.

Table 3 Experimental uncertainties.

Table 4 Legend of the letters and symbols used in the figures reporting the tests results of microchannel condenser with R410A and POE.

Table 5 Legend of the letters and symbols used in the figures reporting the tests results of microchannel condenser with R134a and POE.

Figure 11 Pressure drop at low degree of superheat for R410A+POE oil in microchannel condenser.
Figure 11 Pressure drop at low degree of superheat for R410A+POE oil in microchannel condenser.
Figure 12 Pressure drop at high degree of superheat for R410A+POE oil in microchannel condenser.
Figure 12 Pressure drop at high degree of superheat for R410A+POE oil in microchannel condenser.
Figure 13 Pressure drop factor at high degree of superheat for R134a+POE oil in microchannel condenser.
Figure 13 Pressure drop factor at high degree of superheat for R134a+POE oil in microchannel condenser.

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