Share

Differential mass evacuation sampling method for measuring refrigerant charge in round tube plate fin heat exchangers (ASHRAE RP-1785).

Number: 2273

Author(s) : LEE A. J., BACH C. K., BRADSHAW C. R.

Summary

Charge modeling tools require high-fidelity experimental validation data to tune their predictions. This study addresses this need through a novel, validated, refrigerant charge measurement method for obtaining high-fidelity experimental charge data in Round Tube Plate Fin Heat Exchangers (RTPF). The method determines refrigerant charge in an RTPF by measuring the mass difference to the dry RTPF weight with a custom designed Differential Mass Measurement Scale (DMMS). A validation of the differential mass evacuation sampling method was conducted four times by measuring the same amount of refrigerant (119 g) on the DMMS and a commercial refrigerant scale respectively and comparing each measurement with the other; the mean difference between the DMMS and refrigerant scale measurements was 2.7 ± 1.7 g at 95% confidence interval. In addition, measured charge was confirmed from repeated tests and showed 1.3% repeatability of the method. The validated method can allow collecting high-fidelity experimental charge validation data for a variety of testing conditions in a Round Tube Plate Fin Heat Exchanger (RTPF).

Available documents

Format PDF

Pages: 10 p.

Available

Free

Download

Details

  • Original title: Differential mass evacuation sampling method for measuring refrigerant charge in round tube plate fin heat exchangers (ASHRAE RP-1785).
  • Record ID : 30030639
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

Links


See other articles from the proceedings (224)
See the conference proceedings

Indexing