Experimental Research and Thermographic Analysis of Heat Transfer Processes in a Heat Pipe Heat Exchanger Utilizing as a Working Fluid R134A
This article presents the experimental results of a heat pipe heat exchanger for the lower temperature range of 15–50 °C. It is worth noting that the heat pipes, thanks to the wide temperature range and high efficiency, can soon be used in building engineering. Recognizing the processes taking place in their interior and their work is essential especially in the era of striving to reduce heat loss and avoid unnecessary energy dissipation. The goal of this work was to carry out research and analysis of heat pipes and process condition by the need to save primary energy in both civil engineering and industry. The results show the effects of phase changes for the R134A refrigerant as well as the effect of its amount on the heat and power of the heat pipe. One of the main objectives of the study is to analyze the efficiency of heat pipes for different amounts of working fluid at different temperatures in both the evaporator section (heat delivery) and the condenser section (heat transfer). The paper presents the results of research on real heat exchanger made from copper 1769 mm tube, 18 mm diameter and 1 mm wall thickness. The study involved placing a heat pipe in a tube heat exchanger in a tube to deliver and receive heat to and from a heat pipe.
KeywordsHeat pipe Heat transfer Phase change
The studies presented were financed by the National Science Centre (NCN) Poland under the research program Preludium II, Research and development project is entitled nr: DEC-2011/03/N/ST8/05912 pt. “Badania procesów wymiany ciepła i rozkładów pól prędkości przepływów metodą PIV oraz efektów przemian fazowych i transportu kapilarnego zachodzących w wymiennikach ciepła typu rurka ciepła”.
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