Work

Approximation of Vapor Pressure Curve with Optical Methods in a Heat Pump Test Stand for Pure Isobutane and an Isobutane/Propane Mixture

Year: 2026

Type: conference-paper

Abstract: A reliable description of the dew line of refrigerants is paramount for the safe operation of heat pumps. For commonly used molecules in industrial heat pumps, polynomials for the control of effective superheat are widely available. However, the approach to customize refrigerant mixtures has gained attention in recent years, which introduces a need to find polynomials to describe the vapor pressure curve for a wide range of fluid mixtures. This study investigates two methods to approximate the vapor pressure curve in a heat pump test stand for pure R-600a and a mixture with R-600a and R-290. For pure R-600a, the best polynomial could reproduce the reference vapor pressure curve in the tested region within 9.6 𝑘𝑃𝑎, for the mixture, the best fit achieved an accuracy of 57.9 𝑘𝑃𝑎.

Source: Open Repository and Bibliography (University of Liège)

Authors: Lemke, Paul, Schindler, Ulrich, Langebach, Robin, Brendel, Leon P. M., Lemort, Vincent, Bertsch, Stefan S.

Institutions: University of Liège, Karlsruhe University of Applied Sciences, OST - Ostschweizer Fachhochschule

Language: English

Topic: Refrigeration and Air Conditioning Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7203593285

FWCI:

Cites: 8

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Related to: 10