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Horizontal convective boiling of refrigerants and refrigerant mixtures within a micro-fin tube
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hamilton, Lindsey J. Kedzierski, Mark A. Kaul, Matthew P. |
| Copyright Year | 2005 |
| Abstract | This report presents local convective boiling measurements in a micro-fin tube for four pure refrigerants: R22, R32, R125, and R134a; and four refrigerant mixtures: R410B (R32/125, 45/55 % mass), R32/R134a (27/73 % and 30/70 % mass) and, R407C (R32/125/134a, 25/23/52 % mass). Flow boiling heat transfer coefficients for the mixtures' pure components and R22 were measured to establish a baseline for the heat transfer degradation calculations. The measured convective boiling Nusselt numbers for all of the test refrigerants were correlated to a single expression consisting of a product of dimensionless properties. The correlation was shown to predict some existing data from the literature within 20 %. The degradation in heat transfer performance of the mixtures was found to range from 1 % to 50 % for all refrigerants tested. |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/https://dx.doi.org/10.6028/NIST.IR.7243 |
| Alternate Webpage(s) | https://nvlpubs.nist.gov/nistpubs/Legacy/IR/nistir7243.pdf |
| Alternate Webpage(s) | https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=860975 |
| Alternate Webpage(s) | https://doi.org/10.1002/https%3A%2F%2Fdx.doi.org%2F10.6028%2FNIST.IR.7243 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
