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Research project 185 was the result of dissatisfaction on the part of the author with the usual line-sizing charts employing turning points on multiple diagonal lines. Research project 185 was undertaken to compile a booklet of charts covering refrigerants 12, 22, 502 and 717 based on a simple and more accurate chart. Preparation of the chart data led to related studies, including the effect from viscosity of superheated-vapor on pressure loss.

Citation: ASHRAE Transactions, Volume 88, Part 1, Houston, TX