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Design, construction and operation study of experimental device of heat pump

Kryfos Dionysios

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Summary

Environmental concerns caused by climate change, as well as the current energy crisis, have focused the energy sector's interest on the use of technologies with a low environmental footprint and high operational efficiency. One of these promising technologies is the heat pump.With this in mind, the subject of this thesis was the construction of a fully functional water-to-water heat pump system as a practical application of the theory on which heat pump operation is based.More specifically, the operation of this device is based on the principle of operation of the vapor compression refrigeration cycle, where it was designed and built to be able to provide measurements of quantities such as temperature (water, refrigerant), supply (water), pressure (refrigerant), and various electrical quantities for conducting experiments. The data from the experimental measurements were analyzed and processed to determine the functionality of the device.This thesis is organized as follows:First, in the 1st chapter of the work, a brief historical review of the development of heat pump technology is given, but also a more general description of the different types and applications of heat pump systems and their presence in the world market.In the 2nd chapter, the theoretical background necessary for the elaboration of the thesis is given, focusing on the vapor compression refrigeration cycle.In the 3rd chapter, the design, the manufacturing process, but also the experimental operation of the device is described in detail.Finally, in the 4th chapter, the results of the analysis and processing of the experimental data are presented, which were carried out using the program MS Excel and a code developed in the Python programming language. Based on the results, the coefficient of performance and energy efficiency ratio of the experimental water-to-water heat pump system were determined. The coefficient of performance shows values from 3 to 4, while the energy efficiency ratio shows values from 2.5 to 3.

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